| Message ID | 1570436549-8694-3-git-send-email-uli@fpond.eu (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | PS8640 MIPI-to-eDP bridge | expand |
Hi, cc'ing the drm/bridge maintainers which I think are missing (Andrzej Hajda and Neil Armstrong) Missatge de Matthias Brugger <matthias.bgg@gmail.com> del dia dl., 7 d’oct. 2019 a les 13:04: > > > > On 07/10/2019 10:22, Ulrich Hecht wrote: > > From: Jitao Shi <jitao.shi@mediatek.com> > > > > This patch adds drm_bridge driver for parade DSI to eDP bridge chip. > > > > Signed-off-by: Jitao Shi <jitao.shi@mediatek.com> > > Reviewed-by: Daniel Kurtz <djkurtz@chromium.org> > > Reviewed-by: Enric Balletbo i Serra <enric.balletbo@collabora.com> > > [uli: followed API changes, removed FW update feature] > > Signed-off-by: Ulrich Hecht <uli@fpond.eu> > > Now it works, thanks for pushing this forward :) > > Tested-by: Matthias Brugger <matthias.bgg@gmail.com> > This bridge is really needed in case you have an Acer Chromebook R13, otherwise, you don't have the display working. Would be nice have it upstream :-), If it helps, I tested this patch on top of current 5.4-rc8 and I get the display working, so Tested-by: Enric Balletbo i Serra <enric.balletbo@collabora.com> Thanks, Enric > > --- > > > > Changes since v19: > > - fixed return value of ps8640_probe() when no panel is found > > > > Changes since v18: > > - followed DRM API changes > > - use DEVICE_ATTR_RO() > > - remove firmware update code > > - add SPDX identifier > > > > Changes since v17: > > - remove some unused head files. > > - add macros for ps8640 pages. > > - remove ddc_i2c client > > - add mipi_dsi_device_register_full > > - remove the manufacturer from the name and i2c_device_id > > > > Changes since v16: > > - Disable ps8640 DSI MCS Function. > > - Rename gpios name more clearly. > > - Tune the ps8640 power on sequence. > > > > Changes since v15: > > - Drop drm_connector_(un)register calls from parade ps8640. > > The main DRM driver mtk_drm_drv now calls > > drm_connector_register_all() after drm_dev_register() in the > > mtk_drm_bind() function. That function should iterate over all > > connectors and call drm_connector_register() for each of them. > > So, remove drm_connector_(un)register calls from parade ps8640. > > > > Changes since v14: > > - update copyright info. > > - change bridge_to_ps8640 and connector_to_ps8640 to inline function. > > - fix some coding style. > > - use sizeof as array counter. > > - use drm_get_edid when read edid. > > - add mutex when firmware updating. > > > > Changes since v13: > > - add const on data, ps8640_write_bytes(struct i2c_client *client, const u8 *data, u16 data_len) > > - fix PAGE2_SW_REST tyro. > > - move the buf[3] init to entrance of the function. > > > > Changes since v12: > > - fix hw_chip_id build warning > > > > Changes since v11: > > - Remove depends on I2C, add DRM depends > > - Reuse ps8640_write_bytes() in ps8640_write_byte() > > - Use timer check for polling like the routines in <linux/iopoll.h> > > - Fix no drm_connector_unregister/drm_connector_cleanup when ps8640_bridge_attach fail > > - Check the ps8640 hardware id in ps8640_validate_firmware > > - Remove fw_version check > > - Move ps8640_validate_firmware before ps8640_enter_bl > > - Add ddc_i2c unregister when probe fail and ps8640_remove > > > > > > drivers/gpu/drm/bridge/Kconfig | 12 + > > drivers/gpu/drm/bridge/Makefile | 1 + > > drivers/gpu/drm/bridge/parade-ps8640.c | 672 +++++++++++++++++++++++++++++++++ > > 3 files changed, 685 insertions(+) > > create mode 100644 drivers/gpu/drm/bridge/parade-ps8640.c > > > > diff --git a/drivers/gpu/drm/bridge/Kconfig b/drivers/gpu/drm/bridge/Kconfig > > index 1cc9f50..61c6415 100644 > > --- a/drivers/gpu/drm/bridge/Kconfig > > +++ b/drivers/gpu/drm/bridge/Kconfig > > @@ -82,6 +82,18 @@ config DRM_PARADE_PS8622 > > ---help--- > > Parade eDP-LVDS bridge chip driver. > > > > +config DRM_PARADE_PS8640 > > + tristate "Parade PS8640 MIPI DSI to eDP Converter" > > + depends on DRM > > + depends on OF > > + select DRM_KMS_HELPER > > + select DRM_MIPI_DSI > > + select DRM_PANEL > > + help > > + Choose this option if you have PS8640 for display > > + The PS8640 is a high-performance and low-power > > + MIPI DSI to eDP converter > > + > > config DRM_SIL_SII8620 > > tristate "Silicon Image SII8620 HDMI/MHL bridge" > > depends on OF > > diff --git a/drivers/gpu/drm/bridge/Makefile b/drivers/gpu/drm/bridge/Makefile > > index 4934fcf..14660ab 100644 > > --- a/drivers/gpu/drm/bridge/Makefile > > +++ b/drivers/gpu/drm/bridge/Makefile > > @@ -6,6 +6,7 @@ obj-$(CONFIG_DRM_LVDS_ENCODER) += lvds-encoder.o > > obj-$(CONFIG_DRM_MEGACHIPS_STDPXXXX_GE_B850V3_FW) += megachips-stdpxxxx-ge-b850v3-fw.o > > obj-$(CONFIG_DRM_NXP_PTN3460) += nxp-ptn3460.o > > obj-$(CONFIG_DRM_PARADE_PS8622) += parade-ps8622.o > > +obj-$(CONFIG_DRM_PARADE_PS8640) += parade-ps8640.o > > obj-$(CONFIG_DRM_SIL_SII8620) += sil-sii8620.o > > obj-$(CONFIG_DRM_SII902X) += sii902x.o > > obj-$(CONFIG_DRM_SII9234) += sii9234.o > > diff --git a/drivers/gpu/drm/bridge/parade-ps8640.c b/drivers/gpu/drm/bridge/parade-ps8640.c > > new file mode 100644 > > index 0000000..ac27010 > > --- /dev/null > > +++ b/drivers/gpu/drm/bridge/parade-ps8640.c > > @@ -0,0 +1,672 @@ > > +// SPDX-License-Identifier: GPL-2.0-only > > +/* > > + * Copyright (c) 2016 MediaTek Inc. > > + * > > + * This program is free software; you can redistribute it and/or modify > > + * it under the terms of the GNU General Public License version 2 as > > + * published by the Free Software Foundation. > > + * > > + * This program is distributed in the hope that it will be useful, > > + * but WITHOUT ANY WARRANTY; without even the implied warranty of > > + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the > > + * GNU General Public License for more details. > > + */ > > + > > +#include <linux/delay.h> > > +#include <linux/err.h> > > +#include <linux/firmware.h> > > +#include <linux/gpio/consumer.h> > > +#include <linux/i2c.h> > > +#include <linux/module.h> > > +#include <linux/of_graph.h> > > +#include <linux/regulator/consumer.h> > > +#include <asm/unaligned.h> > > +#include <drm/drm_panel.h> > > + > > +#include <drm/drm_atomic_helper.h> > > +#include <drm/drm_crtc_helper.h> > > +#include <drm/drm_edid.h> > > +#include <drm/drm_mipi_dsi.h> > > +#include <drm/drm_print.h> > > +#include <drm/drm_probe_helper.h> > > + > > +#define PAGE1_VSTART 0x6b > > +#define PAGE2_SPI_CFG3 0x82 > > +#define I2C_TO_SPI_RESET 0x20 > > +#define PAGE2_ROMADD_BYTE1 0x8e > > +#define PAGE2_ROMADD_BYTE2 0x8f > > +#define PAGE2_SWSPI_WDATA 0x90 > > +#define PAGE2_SWSPI_RDATA 0x91 > > +#define PAGE2_SWSPI_LEN 0x92 > > +#define PAGE2_SWSPI_CTL 0x93 > > +#define TRIGGER_NO_READBACK 0x05 > > +#define TRIGGER_READBACK 0x01 > > +#define PAGE2_SPI_STATUS 0x9e > > +#define SPI_READY 0x0c > > +#define PAGE2_GPIO_L 0xa6 > > +#define PAGE2_GPIO_H 0xa7 > > +#define PS_GPIO9 BIT(1) > > +#define PAGE2_IROM_CTRL 0xb0 > > +#define IROM_ENABLE 0xc0 > > +#define IROM_DISABLE 0x80 > > +#define PAGE2_SW_RESET 0xbc > > +#define SPI_SW_RESET BIT(7) > > +#define MPU_SW_RESET BIT(6) > > +#define PAGE2_ENCTLSPI_WR 0xda > > +#define PAGE2_I2C_BYPASS 0xea > > +#define I2C_BYPASS_EN 0xd0 > > +#define PAGE2_MCS_EN 0xf3 > > +#define MCS_EN BIT(0) > > +#define PAGE3_SET_ADD 0xfe > > +#define PAGE3_SET_VAL 0xff > > +#define VDO_CTL_ADD 0x13 > > +#define VDO_DIS 0x18 > > +#define VDO_EN 0x1c > > +#define PAGE4_REV_L 0xf0 > > +#define PAGE4_REV_H 0xf1 > > +#define PAGE4_CHIP_L 0xf2 > > +#define PAGE4_CHIP_H 0xf3 > > + > > +#define PAGE0_DP_CNTL 0 > > +#define PAGE1_VDO_BDG 1 > > +#define PAGE2_TOP_CNTL 2 > > +#define PAGE3_DSI_CNTL1 3 > > +#define PAGE4_MIPI_PHY 4 > > +#define PAGE5_VPLL 5 > > +#define PAGE6_DSI_CNTL2 6 > > +#define PAGE7_SPI_CNTL 7 > > +#define MAX_DEVS 0x8 > > + > > +struct ps8640_info { > > + u8 family_id; > > + u8 variant_id; > > + u16 version; > > +}; > > + > > +struct ps8640 { > > + struct drm_connector connector; > > + struct drm_bridge bridge; > > + struct edid *edid; > > + struct mipi_dsi_device *dsi; > > + struct i2c_client *page[MAX_DEVS]; > > + struct regulator_bulk_data supplies[2]; > > + struct drm_panel *panel; > > + struct gpio_desc *gpio_reset; > > + struct gpio_desc *gpio_power_down; > > + struct gpio_desc *gpio_mode_sel; > > + bool enabled; > > + > > + /* firmware file info */ > > + struct ps8640_info info; > > + bool in_fw_update; > > + /* for firmware update protect */ > > + struct mutex fw_mutex; > > +}; > > + > > +static const u8 enc_ctrl_code[6] = { 0xaa, 0x55, 0x50, 0x41, 0x52, 0x44 }; > > +static const u8 hw_chip_id[4] = { 0x00, 0x0a, 0x00, 0x30 }; > > + > > +static inline struct ps8640 *bridge_to_ps8640(struct drm_bridge *e) > > +{ > > + return container_of(e, struct ps8640, bridge); > > +} > > + > > +static inline struct ps8640 *connector_to_ps8640(struct drm_connector *e) > > +{ > > + return container_of(e, struct ps8640, connector); > > +} > > + > > +static int ps8640_read(struct i2c_client *client, u8 reg, u8 *data, > > + u16 data_len) > > +{ > > + int ret; > > + struct i2c_msg msgs[] = { > > + { > > + .addr = client->addr, > > + .flags = 0, > > + .len = 1, > > + .buf = ®, > > + }, > > + { > > + .addr = client->addr, > > + .flags = I2C_M_RD, > > + .len = data_len, > > + .buf = data, > > + } > > + }; > > + > > + ret = i2c_transfer(client->adapter, msgs, 2); > > + > > + if (ret == 2) > > + return 0; > > + if (ret < 0) > > + return ret; > > + else > > + return -EIO; > > +} > > + > > +static int ps8640_write_bytes(struct i2c_client *client, const u8 *data, > > + u16 data_len) > > +{ > > + int ret; > > + struct i2c_msg msg; > > + > > + msg.addr = client->addr; > > + msg.flags = 0; > > + msg.len = data_len; > > + msg.buf = (u8 *)data; > > + > > + ret = i2c_transfer(client->adapter, &msg, 1); > > + if (ret == 1) > > + return 0; > > + if (ret < 0) > > + return ret; > > + else > > + return -EIO; > > +} > > + > > +static int ps8640_write_byte(struct i2c_client *client, u8 reg, u8 data) > > +{ > > + u8 buf[] = { reg, data }; > > + > > + return ps8640_write_bytes(client, buf, sizeof(buf)); > > +} > > + > > +static void ps8640_get_mcu_fw_version(struct ps8640 *ps_bridge) > > +{ > > + struct i2c_client *client = ps_bridge->page[PAGE5_VPLL]; > > + u8 fw_ver[2]; > > + > > + ps8640_read(client, 0x4, fw_ver, sizeof(fw_ver)); > > + ps_bridge->info.version = (fw_ver[0] << 8) | fw_ver[1]; > > + > > + DRM_INFO_ONCE("ps8640 rom fw version %d.%d\n", fw_ver[0], fw_ver[1]); > > +} > > + > > +static int ps8640_bridge_unmute(struct ps8640 *ps_bridge) > > +{ > > + struct i2c_client *client = ps_bridge->page[PAGE3_DSI_CNTL1]; > > + u8 vdo_ctrl_buf[3] = { PAGE3_SET_ADD, VDO_CTL_ADD, VDO_EN }; > > + > > + return ps8640_write_bytes(client, vdo_ctrl_buf, sizeof(vdo_ctrl_buf)); > > +} > > + > > +static int ps8640_bridge_mute(struct ps8640 *ps_bridge) > > +{ > > + struct i2c_client *client = ps_bridge->page[PAGE3_DSI_CNTL1]; > > + u8 vdo_ctrl_buf[3] = { PAGE3_SET_ADD, VDO_CTL_ADD, VDO_DIS }; > > + > > + return ps8640_write_bytes(client, vdo_ctrl_buf, sizeof(vdo_ctrl_buf)); > > +} > > + > > +static void ps8640_pre_enable(struct drm_bridge *bridge) > > +{ > > + struct ps8640 *ps_bridge = bridge_to_ps8640(bridge); > > + struct i2c_client *client = ps_bridge->page[PAGE2_TOP_CNTL]; > > + struct i2c_client *page1 = ps_bridge->page[PAGE1_VDO_BDG]; > > + int err; > > + u8 set_vdo_done, mcs_en, vstart; > > + ktime_t timeout; > > + > > + if (ps_bridge->in_fw_update) > > + return; > > + > > + if (ps_bridge->enabled) > > + return; > > + > > + err = drm_panel_prepare(ps_bridge->panel); > > + if (err < 0) { > > + DRM_ERROR("failed to prepare panel: %d\n", err); > > + return; > > + } > > + > > + err = regulator_bulk_enable(ARRAY_SIZE(ps_bridge->supplies), > > + ps_bridge->supplies); > > + if (err < 0) { > > + DRM_ERROR("cannot enable regulators %d\n", err); > > + goto err_panel_unprepare; > > + } > > + > > + gpiod_set_value(ps_bridge->gpio_power_down, 1); > > + gpiod_set_value(ps_bridge->gpio_reset, 0); > > + usleep_range(2000, 2500); > > + gpiod_set_value(ps_bridge->gpio_reset, 1); > > + > > + /* > > + * Wait for the ps8640 embed mcu ready > > + * First wait 200ms and then check the mcu ready flag every 20ms > > + */ > > + msleep(200); > > + > > + timeout = ktime_add_ms(ktime_get(), 200); > > + for (;;) { > > + err = ps8640_read(client, PAGE2_GPIO_H, &set_vdo_done, 1); > > + if (err < 0) { > > + DRM_ERROR("failed read PAGE2_GPIO_H: %d\n", err); > > + goto err_regulators_disable; > > + } > > + if ((set_vdo_done & PS_GPIO9) == PS_GPIO9) > > + break; > > + if (ktime_compare(ktime_get(), timeout) > 0) > > + break; > > + msleep(20); > > + } > > + > > + msleep(50); > > + > > + ps8640_read(page1, PAGE1_VSTART, &vstart, 1); > > + DRM_INFO("PS8640 PAGE1.0x6B = 0x%x\n", vstart); > > + > > + /** > > + * The Manufacturer Command Set (MCS) is a device dependent interface > > + * intended for factory programming of the display module default > > + * parameters. Once the display module is configured, the MCS shall be > > + * disabled by the manufacturer. Once disabled, all MCS commands are > > + * ignored by the display interface. > > + */ > > + ps8640_read(client, PAGE2_MCS_EN, &mcs_en, 1); > > + ps8640_write_byte(client, PAGE2_MCS_EN, mcs_en & ~MCS_EN); > > + > > + if (ps_bridge->info.version == 0) > > + ps8640_get_mcu_fw_version(ps_bridge); > > + > > + err = ps8640_bridge_unmute(ps_bridge); > > + if (err) > > + DRM_ERROR("failed to enable unmutevideo: %d\n", err); > > + /* Switch access edp panel's edid through i2c */ > > + ps8640_write_byte(client, PAGE2_I2C_BYPASS, I2C_BYPASS_EN); > > + ps_bridge->enabled = true; > > + > > + return; > > + > > +err_regulators_disable: > > + regulator_bulk_disable(ARRAY_SIZE(ps_bridge->supplies), > > + ps_bridge->supplies); > > +err_panel_unprepare: > > + drm_panel_unprepare(ps_bridge->panel); > > +} > > + > > +static void ps8640_enable(struct drm_bridge *bridge) > > +{ > > + struct ps8640 *ps_bridge = bridge_to_ps8640(bridge); > > + int err; > > + > > + err = drm_panel_enable(ps_bridge->panel); > > + if (err < 0) > > + DRM_ERROR("failed to enable panel: %d\n", err); > > +} > > + > > +static void ps8640_disable(struct drm_bridge *bridge) > > +{ > > + struct ps8640 *ps_bridge = bridge_to_ps8640(bridge); > > + int err; > > + > > + err = drm_panel_disable(ps_bridge->panel); > > + if (err < 0) > > + DRM_ERROR("failed to disable panel: %d\n", err); > > +} > > + > > +static void ps8640_post_disable(struct drm_bridge *bridge) > > +{ > > + struct ps8640 *ps_bridge = bridge_to_ps8640(bridge); > > + int err; > > + > > + if (ps_bridge->in_fw_update) > > + return; > > + > > + if (!ps_bridge->enabled) > > + return; > > + > > + ps_bridge->enabled = false; > > + > > + err = ps8640_bridge_mute(ps_bridge); > > + if (err < 0) > > + DRM_ERROR("failed to unmutevideo: %d\n", err); > > + > > + gpiod_set_value(ps_bridge->gpio_reset, 0); > > + gpiod_set_value(ps_bridge->gpio_power_down, 0); > > + err = regulator_bulk_disable(ARRAY_SIZE(ps_bridge->supplies), > > + ps_bridge->supplies); > > + if (err < 0) > > + DRM_ERROR("cannot disable regulators %d\n", err); > > + > > + err = drm_panel_unprepare(ps_bridge->panel); > > + if (err) > > + DRM_ERROR("failed to unprepare panel: %d\n", err); > > +} > > + > > +static int ps8640_get_modes(struct drm_connector *connector) > > +{ > > + struct ps8640 *ps_bridge = connector_to_ps8640(connector); > > + struct edid *edid; > > + int num_modes = 0; > > + bool power_off; > > + > > + if (ps_bridge->edid) > > + return drm_add_edid_modes(connector, ps_bridge->edid); > > + > > + power_off = !ps_bridge->enabled; > > + ps8640_pre_enable(&ps_bridge->bridge); > > + > > + edid = drm_get_edid(connector, ps_bridge->page[0]->adapter); > > + if (!edid) > > + goto out; > > + > > + ps_bridge->edid = edid; > > + drm_connector_update_edid_property(connector, ps_bridge->edid); > > + num_modes = drm_add_edid_modes(connector, ps_bridge->edid); > > + > > +out: > > + if (power_off) > > + ps8640_post_disable(&ps_bridge->bridge); > > + > > + return num_modes; > > +} > > + > > +static const struct drm_connector_helper_funcs ps8640_connector_helper_funcs = { > > + .get_modes = ps8640_get_modes, > > +}; > > + > > +static enum drm_connector_status ps8640_detect(struct drm_connector *connector, > > + bool force) > > +{ > > + return connector_status_connected; > > +} > > + > > +static const struct drm_connector_funcs ps8640_connector_funcs = { > > + .fill_modes = drm_helper_probe_single_connector_modes, > > + .detect = ps8640_detect, > > + .reset = drm_atomic_helper_connector_reset, > > + .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, > > + .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, > > +}; > > + > > +int ps8640_bridge_attach(struct drm_bridge *bridge) > > +{ > > + struct ps8640 *ps_bridge = bridge_to_ps8640(bridge); > > + struct device *dev = &ps_bridge->page[0]->dev; > > + struct device_node *in_ep, *dsi_node = NULL; > > + struct mipi_dsi_device *dsi; > > + struct mipi_dsi_host *host = NULL; > > + int ret; > > + const struct mipi_dsi_device_info info = { .type = "ps8640", > > + .channel = 0, > > + .node = NULL, > > + }; > > + > > + ret = drm_connector_init(bridge->dev, &ps_bridge->connector, > > + &ps8640_connector_funcs, > > + DRM_MODE_CONNECTOR_eDP); > > + > > + if (ret) { > > + DRM_ERROR("Failed to initialize connector with drm: %d\n", ret); > > + return ret; > > + } > > + > > + drm_connector_helper_add(&ps_bridge->connector, > > + &ps8640_connector_helper_funcs); > > + > > + ps_bridge->connector.dpms = DRM_MODE_DPMS_ON; > > + drm_connector_attach_encoder(&ps_bridge->connector, > > + bridge->encoder); > > + > > + if (ps_bridge->panel) > > + drm_panel_attach(ps_bridge->panel, &ps_bridge->connector); > > + > > + /* port@0 is ps8640 dsi input port */ > > + in_ep = of_graph_get_endpoint_by_regs(dev->of_node, 0, -1); > > + if (in_ep) { > > + dsi_node = of_graph_get_remote_port_parent(in_ep); > > + of_node_put(in_ep); > > + } > > + > > + if (dsi_node) { > > + host = of_find_mipi_dsi_host_by_node(dsi_node); > > + of_node_put(dsi_node); > > + if (!host) { > > + ret = -ENODEV; > > + goto err; > > + } > > + } > > + > > + dsi = mipi_dsi_device_register_full(host, &info); > > + if (IS_ERR(dsi)) { > > + dev_err(dev, "failed to create dsi device\n"); > > + ret = PTR_ERR(dsi); > > + goto err; > > + } > > + > > + ps_bridge->dsi = dsi; > > + > > + dsi->host = host; > > + dsi->mode_flags = MIPI_DSI_MODE_VIDEO | > > + MIPI_DSI_MODE_VIDEO_SYNC_PULSE; > > + dsi->format = MIPI_DSI_FMT_RGB888; > > + dsi->lanes = 4; > > + ret = mipi_dsi_attach(dsi); > > + if (ret) > > + goto err_dsi_attach; > > + > > + return 0; > > + > > +err_dsi_attach: > > + mipi_dsi_device_unregister(dsi); > > +err: > > + if (ps_bridge->panel) > > + drm_panel_detach(ps_bridge->panel); > > + drm_connector_cleanup(&ps_bridge->connector); > > + return ret; > > +} > > + > > +static const struct drm_bridge_funcs ps8640_bridge_funcs = { > > + .attach = ps8640_bridge_attach, > > + .disable = ps8640_disable, > > + .post_disable = ps8640_post_disable, > > + .pre_enable = ps8640_pre_enable, > > + .enable = ps8640_enable, > > +}; > > + > > +/* Firmware Version is returned as Major.Minor */ > > +static ssize_t fw_version_show(struct device *dev, > > + struct device_attribute *attr, char *buf) > > +{ > > + struct ps8640 *ps_bridge = dev_get_drvdata(dev); > > + struct ps8640_info *info = &ps_bridge->info; > > + > > + return scnprintf(buf, PAGE_SIZE, "%u.%u\n", info->version >> 8, > > + info->version & 0xff); > > +} > > + > > +/* Hardware Version is returned as FamilyID.VariantID */ > > +static ssize_t hw_version_show(struct device *dev, > > + struct device_attribute *attr, char *buf) > > +{ > > + struct ps8640 *ps_bridge = dev_get_drvdata(dev); > > + struct ps8640_info *info = &ps_bridge->info; > > + > > + return scnprintf(buf, PAGE_SIZE, "ps%u.%u\n", info->family_id, > > + info->variant_id); > > +} > > + > > +static DEVICE_ATTR_RO(fw_version); > > +static DEVICE_ATTR_RO(hw_version); > > + > > +static struct attribute *ps8640_attrs[] = { > > + &dev_attr_fw_version.attr, > > + &dev_attr_hw_version.attr, > > + NULL > > +}; > > + > > +static const struct attribute_group ps8640_attr_group = { > > + .attrs = ps8640_attrs, > > +}; > > + > > +static void ps8640_remove_sysfs_group(void *data) > > +{ > > + struct ps8640 *ps_bridge = data; > > + > > + sysfs_remove_group(&ps_bridge->page[0]->dev.kobj, &ps8640_attr_group); > > +} > > + > > +static int ps8640_probe(struct i2c_client *client, > > + const struct i2c_device_id *id) > > +{ > > + struct device *dev = &client->dev; > > + struct ps8640 *ps_bridge; > > + struct device_node *np = dev->of_node; > > + struct device_node *port, *out_ep; > > + struct device_node *panel_node = NULL; > > + int ret; > > + u32 i; > > + > > + ps_bridge = devm_kzalloc(dev, sizeof(*ps_bridge), GFP_KERNEL); > > + if (!ps_bridge) > > + return -ENOMEM; > > + > > + /* port@1 is ps8640 output port */ > > + port = of_graph_get_port_by_id(np, 1); > > + if (port) { > > + out_ep = of_get_child_by_name(port, "endpoint"); > > + of_node_put(port); > > + if (out_ep) { > > + panel_node = of_graph_get_remote_port_parent(out_ep); > > + of_node_put(out_ep); > > + } > > + } > > + if (panel_node) { > > + ps_bridge->panel = of_drm_find_panel(panel_node); > > + of_node_put(panel_node); > > + if (IS_ERR(ps_bridge->panel)) > > + return PTR_ERR(ps_bridge->panel); > > + } > > + > > + mutex_init(&ps_bridge->fw_mutex); > > + ps_bridge->supplies[0].supply = "vdd33"; > > + ps_bridge->supplies[1].supply = "vdd12"; > > + ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(ps_bridge->supplies), > > + ps_bridge->supplies); > > + if (ret) { > > + dev_info(dev, "failed to get regulators: %d\n", ret); > > + return ret; > > + } > > + > > + ps_bridge->gpio_mode_sel = devm_gpiod_get_optional(&client->dev, > > + "mode-sel", > > + GPIOD_OUT_HIGH); > > + if (IS_ERR(ps_bridge->gpio_mode_sel)) { > > + ret = PTR_ERR(ps_bridge->gpio_mode_sel); > > + dev_err(dev, "cannot get mode-sel %d\n", ret); > > + return ret; > > + } > > + > > + ps_bridge->gpio_power_down = devm_gpiod_get(&client->dev, "sleep", > > + GPIOD_OUT_LOW); > > + if (IS_ERR(ps_bridge->gpio_power_down)) { > > + ret = PTR_ERR(ps_bridge->gpio_power_down); > > + dev_err(dev, "cannot get sleep: %d\n", ret); > > + return ret; > > + } > > + > > + /* > > + * Request the reset pin low to avoid the bridge being > > + * initialized prematurely > > + */ > > + ps_bridge->gpio_reset = devm_gpiod_get(&client->dev, "reset", > > + GPIOD_OUT_LOW); > > + if (IS_ERR(ps_bridge->gpio_reset)) { > > + ret = PTR_ERR(ps_bridge->gpio_reset); > > + dev_err(dev, "cannot get reset: %d\n", ret); > > + return ret; > > + } > > + > > + ps_bridge->bridge.funcs = &ps8640_bridge_funcs; > > + ps_bridge->bridge.of_node = dev->of_node; > > + > > + ps_bridge->page[0] = client; > > + > > + /* > > + * ps8640 uses multiple addresses, use dummy devices for them > > + * page[0]: for DP control > > + * page[1]: for VIDEO Bridge > > + * page[2]: for control top > > + * page[3]: for DSI Link Control1 > > + * page[4]: for MIPI Phy > > + * page[5]: for VPLL > > + * page[6]: for DSI Link Control2 > > + * page[7]: for spi rom mapping > > + */ > > + for (i = 1; i < MAX_DEVS; i++) { > > + ps_bridge->page[i] = i2c_new_dummy(client->adapter, > > + client->addr + i); > > + if (!ps_bridge->page[i]) { > > + dev_err(dev, "failed i2c dummy device, address%02x\n", > > + client->addr + i); > > + ret = -EBUSY; > > + goto exit_dummy; > > + } > > + } > > + i2c_set_clientdata(client, ps_bridge); > > + > > + ret = sysfs_create_group(&client->dev.kobj, &ps8640_attr_group); > > + if (ret) { > > + dev_err(dev, "failed to create sysfs entries: %d\n", ret); > > + goto exit_dummy; > > + } > > + > > + ret = devm_add_action(dev, ps8640_remove_sysfs_group, ps_bridge); > > + if (ret) { > > + dev_err(dev, "failed to add sysfs cleanup action: %d\n", ret); > > + goto exit_remove_sysfs; > > + } > > + > > + drm_bridge_add(&ps_bridge->bridge); > > + return 0; > > + > > +exit_remove_sysfs: > > + sysfs_remove_group(&ps_bridge->page[0]->dev.kobj, &ps8640_attr_group); > > +exit_dummy: > > + while (--i) > > + i2c_unregister_device(ps_bridge->page[i]); > > + return ret; > > +} > > + > > +static int ps8640_remove(struct i2c_client *client) > > +{ > > + struct ps8640 *ps_bridge = i2c_get_clientdata(client); > > + int i = MAX_DEVS; > > + > > + drm_bridge_remove(&ps_bridge->bridge); > > + sysfs_remove_group(&ps_bridge->page[0]->dev.kobj, &ps8640_attr_group); > > + while (--i) > > + i2c_unregister_device(ps_bridge->page[i]); > > + > > + return 0; > > +} > > + > > +static const struct i2c_device_id ps8640_i2c_table[] = { > > + { "ps8640", 0 }, > > + { /* sentinel */ }, > > +}; > > +MODULE_DEVICE_TABLE(i2c, ps8640_i2c_table); > > + > > +static const struct of_device_id ps8640_match[] = { > > + { .compatible = "parade,ps8640" }, > > + { /* sentinel */ }, > > +}; > > +MODULE_DEVICE_TABLE(of, ps8640_match); > > + > > +static struct i2c_driver ps8640_driver = { > > + .id_table = ps8640_i2c_table, > > + .probe = ps8640_probe, > > + .remove = ps8640_remove, > > + .driver = { > > + .name = "ps8640", > > + .of_match_table = ps8640_match, > > + }, > > +}; > > +module_i2c_driver(ps8640_driver); > > + > > +MODULE_AUTHOR("Jitao Shi <jitao.shi@mediatek.com>"); > > +MODULE_AUTHOR("CK Hu <ck.hu@mediatek.com>"); > > +MODULE_DESCRIPTION("PARADE ps8640 DSI-eDP converter driver"); > > +MODULE_LICENSE("GPL v2"); > > > _______________________________________________ > dri-devel mailing list > dri-devel@lists.freedesktop.org > https://lists.freedesktop.org/mailman/listinfo/dri-devel
On 07/10/2019 10:22, Ulrich Hecht wrote: > From: Jitao Shi <jitao.shi@mediatek.com> > > This patch adds drm_bridge driver for parade DSI to eDP bridge chip. > > Signed-off-by: Jitao Shi <jitao.shi@mediatek.com> > Reviewed-by: Daniel Kurtz <djkurtz@chromium.org> > Reviewed-by: Enric Balletbo i Serra <enric.balletbo@collabora.com> > [uli: followed API changes, removed FW update feature] > Signed-off-by: Ulrich Hecht <uli@fpond.eu> > --- > > Changes since v19: > - fixed return value of ps8640_probe() when no panel is found > > Changes since v18: > - followed DRM API changes > - use DEVICE_ATTR_RO() > - remove firmware update code > - add SPDX identifier > > Changes since v17: > - remove some unused head files. > - add macros for ps8640 pages. > - remove ddc_i2c client > - add mipi_dsi_device_register_full > - remove the manufacturer from the name and i2c_device_id > > Changes since v16: > - Disable ps8640 DSI MCS Function. > - Rename gpios name more clearly. > - Tune the ps8640 power on sequence. > > Changes since v15: > - Drop drm_connector_(un)register calls from parade ps8640. > The main DRM driver mtk_drm_drv now calls > drm_connector_register_all() after drm_dev_register() in the > mtk_drm_bind() function. That function should iterate over all > connectors and call drm_connector_register() for each of them. > So, remove drm_connector_(un)register calls from parade ps8640. > > Changes since v14: > - update copyright info. > - change bridge_to_ps8640 and connector_to_ps8640 to inline function. > - fix some coding style. > - use sizeof as array counter. > - use drm_get_edid when read edid. > - add mutex when firmware updating. > > Changes since v13: > - add const on data, ps8640_write_bytes(struct i2c_client *client, const u8 *data, u16 data_len) > - fix PAGE2_SW_REST tyro. > - move the buf[3] init to entrance of the function. > > Changes since v12: > - fix hw_chip_id build warning > > Changes since v11: > - Remove depends on I2C, add DRM depends > - Reuse ps8640_write_bytes() in ps8640_write_byte() > - Use timer check for polling like the routines in <linux/iopoll.h> > - Fix no drm_connector_unregister/drm_connector_cleanup when ps8640_bridge_attach fail > - Check the ps8640 hardware id in ps8640_validate_firmware > - Remove fw_version check > - Move ps8640_validate_firmware before ps8640_enter_bl > - Add ddc_i2c unregister when probe fail and ps8640_remove > > > drivers/gpu/drm/bridge/Kconfig | 12 + > drivers/gpu/drm/bridge/Makefile | 1 + > drivers/gpu/drm/bridge/parade-ps8640.c | 672 +++++++++++++++++++++++++++++++++ > 3 files changed, 685 insertions(+) > create mode 100644 drivers/gpu/drm/bridge/parade-ps8640.c > > diff --git a/drivers/gpu/drm/bridge/Kconfig b/drivers/gpu/drm/bridge/Kconfig > index 1cc9f50..61c6415 100644 > --- a/drivers/gpu/drm/bridge/Kconfig > +++ b/drivers/gpu/drm/bridge/Kconfig > @@ -82,6 +82,18 @@ config DRM_PARADE_PS8622 > ---help--- > Parade eDP-LVDS bridge chip driver. > > +config DRM_PARADE_PS8640 > + tristate "Parade PS8640 MIPI DSI to eDP Converter" > + depends on DRM > + depends on OF > + select DRM_KMS_HELPER > + select DRM_MIPI_DSI > + select DRM_PANEL > + help > + Choose this option if you have PS8640 for display > + The PS8640 is a high-performance and low-power > + MIPI DSI to eDP converter > + > config DRM_SIL_SII8620 > tristate "Silicon Image SII8620 HDMI/MHL bridge" > depends on OF > diff --git a/drivers/gpu/drm/bridge/Makefile b/drivers/gpu/drm/bridge/Makefile > index 4934fcf..14660ab 100644 > --- a/drivers/gpu/drm/bridge/Makefile > +++ b/drivers/gpu/drm/bridge/Makefile > @@ -6,6 +6,7 @@ obj-$(CONFIG_DRM_LVDS_ENCODER) += lvds-encoder.o > obj-$(CONFIG_DRM_MEGACHIPS_STDPXXXX_GE_B850V3_FW) += megachips-stdpxxxx-ge-b850v3-fw.o > obj-$(CONFIG_DRM_NXP_PTN3460) += nxp-ptn3460.o > obj-$(CONFIG_DRM_PARADE_PS8622) += parade-ps8622.o > +obj-$(CONFIG_DRM_PARADE_PS8640) += parade-ps8640.o > obj-$(CONFIG_DRM_SIL_SII8620) += sil-sii8620.o > obj-$(CONFIG_DRM_SII902X) += sii902x.o > obj-$(CONFIG_DRM_SII9234) += sii9234.o > diff --git a/drivers/gpu/drm/bridge/parade-ps8640.c b/drivers/gpu/drm/bridge/parade-ps8640.c > new file mode 100644 > index 0000000..ac27010 > --- /dev/null > +++ b/drivers/gpu/drm/bridge/parade-ps8640.c > @@ -0,0 +1,672 @@ > +// SPDX-License-Identifier: GPL-2.0-only > +/* > + * Copyright (c) 2016 MediaTek Inc. > + * > + * This program is free software; you can redistribute it and/or modify > + * it under the terms of the GNU General Public License version 2 as > + * published by the Free Software Foundation. > + * > + * This program is distributed in the hope that it will be useful, > + * but WITHOUT ANY WARRANTY; without even the implied warranty of > + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the > + * GNU General Public License for more details. > + */ > + > +#include <linux/delay.h> > +#include <linux/err.h> > +#include <linux/firmware.h> > +#include <linux/gpio/consumer.h> > +#include <linux/i2c.h> > +#include <linux/module.h> > +#include <linux/of_graph.h> > +#include <linux/regulator/consumer.h> > +#include <asm/unaligned.h> > +#include <drm/drm_panel.h> > + > +#include <drm/drm_atomic_helper.h> > +#include <drm/drm_crtc_helper.h> > +#include <drm/drm_edid.h> > +#include <drm/drm_mipi_dsi.h> > +#include <drm/drm_print.h> > +#include <drm/drm_probe_helper.h> > + > +#define PAGE1_VSTART 0x6b > +#define PAGE2_SPI_CFG3 0x82 > +#define I2C_TO_SPI_RESET 0x20 > +#define PAGE2_ROMADD_BYTE1 0x8e > +#define PAGE2_ROMADD_BYTE2 0x8f > +#define PAGE2_SWSPI_WDATA 0x90 > +#define PAGE2_SWSPI_RDATA 0x91 > +#define PAGE2_SWSPI_LEN 0x92 > +#define PAGE2_SWSPI_CTL 0x93 > +#define TRIGGER_NO_READBACK 0x05 > +#define TRIGGER_READBACK 0x01 > +#define PAGE2_SPI_STATUS 0x9e > +#define SPI_READY 0x0c > +#define PAGE2_GPIO_L 0xa6 > +#define PAGE2_GPIO_H 0xa7 > +#define PS_GPIO9 BIT(1) > +#define PAGE2_IROM_CTRL 0xb0 > +#define IROM_ENABLE 0xc0 > +#define IROM_DISABLE 0x80 > +#define PAGE2_SW_RESET 0xbc > +#define SPI_SW_RESET BIT(7) > +#define MPU_SW_RESET BIT(6) > +#define PAGE2_ENCTLSPI_WR 0xda > +#define PAGE2_I2C_BYPASS 0xea > +#define I2C_BYPASS_EN 0xd0 > +#define PAGE2_MCS_EN 0xf3 > +#define MCS_EN BIT(0) > +#define PAGE3_SET_ADD 0xfe > +#define PAGE3_SET_VAL 0xff > +#define VDO_CTL_ADD 0x13 > +#define VDO_DIS 0x18 > +#define VDO_EN 0x1c > +#define PAGE4_REV_L 0xf0 > +#define PAGE4_REV_H 0xf1 > +#define PAGE4_CHIP_L 0xf2 > +#define PAGE4_CHIP_H 0xf3 > + > +#define PAGE0_DP_CNTL 0 > +#define PAGE1_VDO_BDG 1 > +#define PAGE2_TOP_CNTL 2 > +#define PAGE3_DSI_CNTL1 3 > +#define PAGE4_MIPI_PHY 4 > +#define PAGE5_VPLL 5 > +#define PAGE6_DSI_CNTL2 6 > +#define PAGE7_SPI_CNTL 7 > +#define MAX_DEVS 0x8 > + > +struct ps8640_info { > + u8 family_id; > + u8 variant_id; > + u16 version; > +}; > + > +struct ps8640 { > + struct drm_connector connector; > + struct drm_bridge bridge; > + struct edid *edid; > + struct mipi_dsi_device *dsi; > + struct i2c_client *page[MAX_DEVS]; > + struct regulator_bulk_data supplies[2]; > + struct drm_panel *panel; > + struct gpio_desc *gpio_reset; > + struct gpio_desc *gpio_power_down; > + struct gpio_desc *gpio_mode_sel; > + bool enabled; > + > + /* firmware file info */ > + struct ps8640_info info; > + bool in_fw_update; > + /* for firmware update protect */ > + struct mutex fw_mutex; > +}; > + > +static const u8 enc_ctrl_code[6] = { 0xaa, 0x55, 0x50, 0x41, 0x52, 0x44 }; > +static const u8 hw_chip_id[4] = { 0x00, 0x0a, 0x00, 0x30 }; > + > +static inline struct ps8640 *bridge_to_ps8640(struct drm_bridge *e) > +{ > + return container_of(e, struct ps8640, bridge); > +} > + > +static inline struct ps8640 *connector_to_ps8640(struct drm_connector *e) > +{ > + return container_of(e, struct ps8640, connector); > +} > + > +static int ps8640_read(struct i2c_client *client, u8 reg, u8 *data, > + u16 data_len) > +{ > + int ret; > + struct i2c_msg msgs[] = { > + { > + .addr = client->addr, > + .flags = 0, > + .len = 1, > + .buf = ®, > + }, > + { > + .addr = client->addr, > + .flags = I2C_M_RD, > + .len = data_len, > + .buf = data, > + } > + }; > + > + ret = i2c_transfer(client->adapter, msgs, 2); > + > + if (ret == 2) > + return 0; > + if (ret < 0) > + return ret; > + else > + return -EIO; > +} > + > +static int ps8640_write_bytes(struct i2c_client *client, const u8 *data, > + u16 data_len) > +{ > + int ret; > + struct i2c_msg msg; > + > + msg.addr = client->addr; > + msg.flags = 0; > + msg.len = data_len; > + msg.buf = (u8 *)data; > + > + ret = i2c_transfer(client->adapter, &msg, 1); > + if (ret == 1) > + return 0; > + if (ret < 0) > + return ret; > + else > + return -EIO; > +} > + > +static int ps8640_write_byte(struct i2c_client *client, u8 reg, u8 data) > +{ > + u8 buf[] = { reg, data }; > + > + return ps8640_write_bytes(client, buf, sizeof(buf)); > +} > + > +static void ps8640_get_mcu_fw_version(struct ps8640 *ps_bridge) > +{ > + struct i2c_client *client = ps_bridge->page[PAGE5_VPLL]; > + u8 fw_ver[2]; > + > + ps8640_read(client, 0x4, fw_ver, sizeof(fw_ver)); > + ps_bridge->info.version = (fw_ver[0] << 8) | fw_ver[1]; > + > + DRM_INFO_ONCE("ps8640 rom fw version %d.%d\n", fw_ver[0], fw_ver[1]); > +} > + > +static int ps8640_bridge_unmute(struct ps8640 *ps_bridge) > +{ > + struct i2c_client *client = ps_bridge->page[PAGE3_DSI_CNTL1]; > + u8 vdo_ctrl_buf[3] = { PAGE3_SET_ADD, VDO_CTL_ADD, VDO_EN }; > + > + return ps8640_write_bytes(client, vdo_ctrl_buf, sizeof(vdo_ctrl_buf)); > +} > + > +static int ps8640_bridge_mute(struct ps8640 *ps_bridge) > +{ > + struct i2c_client *client = ps_bridge->page[PAGE3_DSI_CNTL1]; > + u8 vdo_ctrl_buf[3] = { PAGE3_SET_ADD, VDO_CTL_ADD, VDO_DIS }; > + > + return ps8640_write_bytes(client, vdo_ctrl_buf, sizeof(vdo_ctrl_buf)); > +} > + > +static void ps8640_pre_enable(struct drm_bridge *bridge) > +{ > + struct ps8640 *ps_bridge = bridge_to_ps8640(bridge); > + struct i2c_client *client = ps_bridge->page[PAGE2_TOP_CNTL]; > + struct i2c_client *page1 = ps_bridge->page[PAGE1_VDO_BDG]; > + int err; > + u8 set_vdo_done, mcs_en, vstart; > + ktime_t timeout; > + > + if (ps_bridge->in_fw_update) > + return; > + > + if (ps_bridge->enabled) > + return; > + > + err = drm_panel_prepare(ps_bridge->panel); > + if (err < 0) { > + DRM_ERROR("failed to prepare panel: %d\n", err); > + return; > + } > + > + err = regulator_bulk_enable(ARRAY_SIZE(ps_bridge->supplies), > + ps_bridge->supplies); > + if (err < 0) { > + DRM_ERROR("cannot enable regulators %d\n", err); > + goto err_panel_unprepare; > + } > + > + gpiod_set_value(ps_bridge->gpio_power_down, 1); > + gpiod_set_value(ps_bridge->gpio_reset, 0); > + usleep_range(2000, 2500); > + gpiod_set_value(ps_bridge->gpio_reset, 1); > + > + /* > + * Wait for the ps8640 embed mcu ready > + * First wait 200ms and then check the mcu ready flag every 20ms > + */ > + msleep(200); > + > + timeout = ktime_add_ms(ktime_get(), 200); > + for (;;) { > + err = ps8640_read(client, PAGE2_GPIO_H, &set_vdo_done, 1); > + if (err < 0) { > + DRM_ERROR("failed read PAGE2_GPIO_H: %d\n", err); > + goto err_regulators_disable; > + } > + if ((set_vdo_done & PS_GPIO9) == PS_GPIO9) > + break; > + if (ktime_compare(ktime_get(), timeout) > 0) > + break; > + msleep(20); > + } > + > + msleep(50); > + > + ps8640_read(page1, PAGE1_VSTART, &vstart, 1); > + DRM_INFO("PS8640 PAGE1.0x6B = 0x%x\n", vstart); > + > + /** > + * The Manufacturer Command Set (MCS) is a device dependent interface > + * intended for factory programming of the display module default > + * parameters. Once the display module is configured, the MCS shall be > + * disabled by the manufacturer. Once disabled, all MCS commands are > + * ignored by the display interface. > + */ > + ps8640_read(client, PAGE2_MCS_EN, &mcs_en, 1); > + ps8640_write_byte(client, PAGE2_MCS_EN, mcs_en & ~MCS_EN); > + > + if (ps_bridge->info.version == 0) > + ps8640_get_mcu_fw_version(ps_bridge); > + > + err = ps8640_bridge_unmute(ps_bridge); > + if (err) > + DRM_ERROR("failed to enable unmutevideo: %d\n", err); > + /* Switch access edp panel's edid through i2c */ > + ps8640_write_byte(client, PAGE2_I2C_BYPASS, I2C_BYPASS_EN); > + ps_bridge->enabled = true; > + > + return; > + > +err_regulators_disable: > + regulator_bulk_disable(ARRAY_SIZE(ps_bridge->supplies), > + ps_bridge->supplies); > +err_panel_unprepare: > + drm_panel_unprepare(ps_bridge->panel); > +} > + > +static void ps8640_enable(struct drm_bridge *bridge) > +{ > + struct ps8640 *ps_bridge = bridge_to_ps8640(bridge); > + int err; > + > + err = drm_panel_enable(ps_bridge->panel); > + if (err < 0) > + DRM_ERROR("failed to enable panel: %d\n", err); > +} > + > +static void ps8640_disable(struct drm_bridge *bridge) > +{ > + struct ps8640 *ps_bridge = bridge_to_ps8640(bridge); > + int err; > + > + err = drm_panel_disable(ps_bridge->panel); > + if (err < 0) > + DRM_ERROR("failed to disable panel: %d\n", err); > +} > + > +static void ps8640_post_disable(struct drm_bridge *bridge) > +{ > + struct ps8640 *ps_bridge = bridge_to_ps8640(bridge); > + int err; > + > + if (ps_bridge->in_fw_update) > + return; > + > + if (!ps_bridge->enabled) > + return; > + > + ps_bridge->enabled = false; > + > + err = ps8640_bridge_mute(ps_bridge); > + if (err < 0) > + DRM_ERROR("failed to unmutevideo: %d\n", err); > + > + gpiod_set_value(ps_bridge->gpio_reset, 0); > + gpiod_set_value(ps_bridge->gpio_power_down, 0); > + err = regulator_bulk_disable(ARRAY_SIZE(ps_bridge->supplies), > + ps_bridge->supplies); > + if (err < 0) > + DRM_ERROR("cannot disable regulators %d\n", err); > + > + err = drm_panel_unprepare(ps_bridge->panel); > + if (err) > + DRM_ERROR("failed to unprepare panel: %d\n", err); > +} > + > +static int ps8640_get_modes(struct drm_connector *connector) > +{ > + struct ps8640 *ps_bridge = connector_to_ps8640(connector); > + struct edid *edid; > + int num_modes = 0; > + bool power_off; > + > + if (ps_bridge->edid) > + return drm_add_edid_modes(connector, ps_bridge->edid); > + > + power_off = !ps_bridge->enabled; > + ps8640_pre_enable(&ps_bridge->bridge); > + > + edid = drm_get_edid(connector, ps_bridge->page[0]->adapter); > + if (!edid) > + goto out; > + > + ps_bridge->edid = edid; > + drm_connector_update_edid_property(connector, ps_bridge->edid); > + num_modes = drm_add_edid_modes(connector, ps_bridge->edid); > + > +out: > + if (power_off) > + ps8640_post_disable(&ps_bridge->bridge); > + > + return num_modes; > +} > + > +static const struct drm_connector_helper_funcs ps8640_connector_helper_funcs = { > + .get_modes = ps8640_get_modes, > +}; > + > +static enum drm_connector_status ps8640_detect(struct drm_connector *connector, > + bool force) > +{ > + return connector_status_connected; > +} > + > +static const struct drm_connector_funcs ps8640_connector_funcs = { > + .fill_modes = drm_helper_probe_single_connector_modes, > + .detect = ps8640_detect, > + .reset = drm_atomic_helper_connector_reset, > + .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, > + .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, > +}; > + > +int ps8640_bridge_attach(struct drm_bridge *bridge) > +{ > + struct ps8640 *ps_bridge = bridge_to_ps8640(bridge); > + struct device *dev = &ps_bridge->page[0]->dev; > + struct device_node *in_ep, *dsi_node = NULL; > + struct mipi_dsi_device *dsi; > + struct mipi_dsi_host *host = NULL; > + int ret; > + const struct mipi_dsi_device_info info = { .type = "ps8640", > + .channel = 0, > + .node = NULL, > + }; > + > + ret = drm_connector_init(bridge->dev, &ps_bridge->connector, > + &ps8640_connector_funcs, > + DRM_MODE_CONNECTOR_eDP); > + > + if (ret) { > + DRM_ERROR("Failed to initialize connector with drm: %d\n", ret); > + return ret; > + } > + > + drm_connector_helper_add(&ps_bridge->connector, > + &ps8640_connector_helper_funcs); > + > + ps_bridge->connector.dpms = DRM_MODE_DPMS_ON; > + drm_connector_attach_encoder(&ps_bridge->connector, > + bridge->encoder); > + > + if (ps_bridge->panel) > + drm_panel_attach(ps_bridge->panel, &ps_bridge->connector); > + > + /* port@0 is ps8640 dsi input port */ > + in_ep = of_graph_get_endpoint_by_regs(dev->of_node, 0, -1); > + if (in_ep) { > + dsi_node = of_graph_get_remote_port_parent(in_ep); > + of_node_put(in_ep); > + } > + > + if (dsi_node) { > + host = of_find_mipi_dsi_host_by_node(dsi_node); > + of_node_put(dsi_node); > + if (!host) { > + ret = -ENODEV; > + goto err; > + } > + } > + > + dsi = mipi_dsi_device_register_full(host, &info); > + if (IS_ERR(dsi)) { > + dev_err(dev, "failed to create dsi device\n"); > + ret = PTR_ERR(dsi); > + goto err; > + } > + > + ps_bridge->dsi = dsi; > + > + dsi->host = host; > + dsi->mode_flags = MIPI_DSI_MODE_VIDEO | > + MIPI_DSI_MODE_VIDEO_SYNC_PULSE; > + dsi->format = MIPI_DSI_FMT_RGB888; > + dsi->lanes = 4; > + ret = mipi_dsi_attach(dsi); > + if (ret) > + goto err_dsi_attach; > + > + return 0; > + > +err_dsi_attach: > + mipi_dsi_device_unregister(dsi); > +err: > + if (ps_bridge->panel) > + drm_panel_detach(ps_bridge->panel); > + drm_connector_cleanup(&ps_bridge->connector); > + return ret; > +} > + > +static const struct drm_bridge_funcs ps8640_bridge_funcs = { > + .attach = ps8640_bridge_attach, > + .disable = ps8640_disable, > + .post_disable = ps8640_post_disable, > + .pre_enable = ps8640_pre_enable, > + .enable = ps8640_enable, > +}; > + > +/* Firmware Version is returned as Major.Minor */ > +static ssize_t fw_version_show(struct device *dev, > + struct device_attribute *attr, char *buf) > +{ > + struct ps8640 *ps_bridge = dev_get_drvdata(dev); > + struct ps8640_info *info = &ps_bridge->info; > + > + return scnprintf(buf, PAGE_SIZE, "%u.%u\n", info->version >> 8, > + info->version & 0xff); > +} > + > +/* Hardware Version is returned as FamilyID.VariantID */ > +static ssize_t hw_version_show(struct device *dev, > + struct device_attribute *attr, char *buf) > +{ > + struct ps8640 *ps_bridge = dev_get_drvdata(dev); > + struct ps8640_info *info = &ps_bridge->info; > + > + return scnprintf(buf, PAGE_SIZE, "ps%u.%u\n", info->family_id, > + info->variant_id); > +} > + > +static DEVICE_ATTR_RO(fw_version); > +static DEVICE_ATTR_RO(hw_version); > + > +static struct attribute *ps8640_attrs[] = { > + &dev_attr_fw_version.attr, > + &dev_attr_hw_version.attr, > + NULL > +}; > + > +static const struct attribute_group ps8640_attr_group = { > + .attrs = ps8640_attrs, > +}; > + > +static void ps8640_remove_sysfs_group(void *data) > +{ > + struct ps8640 *ps_bridge = data; > + > + sysfs_remove_group(&ps_bridge->page[0]->dev.kobj, &ps8640_attr_group); > +} > + > +static int ps8640_probe(struct i2c_client *client, > + const struct i2c_device_id *id) > +{ > + struct device *dev = &client->dev; > + struct ps8640 *ps_bridge; > + struct device_node *np = dev->of_node; > + struct device_node *port, *out_ep; > + struct device_node *panel_node = NULL; > + int ret; > + u32 i; > + > + ps_bridge = devm_kzalloc(dev, sizeof(*ps_bridge), GFP_KERNEL); > + if (!ps_bridge) > + return -ENOMEM; > + > + /* port@1 is ps8640 output port */ > + port = of_graph_get_port_by_id(np, 1); > + if (port) { > + out_ep = of_get_child_by_name(port, "endpoint"); > + of_node_put(port); > + if (out_ep) { > + panel_node = of_graph_get_remote_port_parent(out_ep); > + of_node_put(out_ep); > + } > + } > + if (panel_node) { > + ps_bridge->panel = of_drm_find_panel(panel_node); > + of_node_put(panel_node); > + if (IS_ERR(ps_bridge->panel)) > + return PTR_ERR(ps_bridge->panel); > + } > + > + mutex_init(&ps_bridge->fw_mutex); > + ps_bridge->supplies[0].supply = "vdd33"; > + ps_bridge->supplies[1].supply = "vdd12"; > + ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(ps_bridge->supplies), > + ps_bridge->supplies); > + if (ret) { > + dev_info(dev, "failed to get regulators: %d\n", ret); > + return ret; > + } > + > + ps_bridge->gpio_mode_sel = devm_gpiod_get_optional(&client->dev, > + "mode-sel", > + GPIOD_OUT_HIGH); > + if (IS_ERR(ps_bridge->gpio_mode_sel)) { > + ret = PTR_ERR(ps_bridge->gpio_mode_sel); > + dev_err(dev, "cannot get mode-sel %d\n", ret); > + return ret; > + } > + > + ps_bridge->gpio_power_down = devm_gpiod_get(&client->dev, "sleep", > + GPIOD_OUT_LOW); > + if (IS_ERR(ps_bridge->gpio_power_down)) { > + ret = PTR_ERR(ps_bridge->gpio_power_down); > + dev_err(dev, "cannot get sleep: %d\n", ret); > + return ret; > + } > + > + /* > + * Request the reset pin low to avoid the bridge being > + * initialized prematurely > + */ > + ps_bridge->gpio_reset = devm_gpiod_get(&client->dev, "reset", > + GPIOD_OUT_LOW); > + if (IS_ERR(ps_bridge->gpio_reset)) { > + ret = PTR_ERR(ps_bridge->gpio_reset); > + dev_err(dev, "cannot get reset: %d\n", ret); > + return ret; > + } > + > + ps_bridge->bridge.funcs = &ps8640_bridge_funcs; > + ps_bridge->bridge.of_node = dev->of_node; > + > + ps_bridge->page[0] = client; > + > + /* > + * ps8640 uses multiple addresses, use dummy devices for them > + * page[0]: for DP control > + * page[1]: for VIDEO Bridge > + * page[2]: for control top > + * page[3]: for DSI Link Control1 > + * page[4]: for MIPI Phy > + * page[5]: for VPLL > + * page[6]: for DSI Link Control2 > + * page[7]: for spi rom mapping > + */ > + for (i = 1; i < MAX_DEVS; i++) { > + ps_bridge->page[i] = i2c_new_dummy(client->adapter, > + client->addr + i); I think this has changed to i2c_new_dummy_device(). Are you planning to rebase and respin the series? Regrads, Matthias > + if (!ps_bridge->page[i]) { > + dev_err(dev, "failed i2c dummy device, address%02x\n", > + client->addr + i); > + ret = -EBUSY; > + goto exit_dummy; > + } > + } > + i2c_set_clientdata(client, ps_bridge); > + > + ret = sysfs_create_group(&client->dev.kobj, &ps8640_attr_group); > + if (ret) { > + dev_err(dev, "failed to create sysfs entries: %d\n", ret); > + goto exit_dummy; > + } > + > + ret = devm_add_action(dev, ps8640_remove_sysfs_group, ps_bridge); > + if (ret) { > + dev_err(dev, "failed to add sysfs cleanup action: %d\n", ret); > + goto exit_remove_sysfs; > + } > + > + drm_bridge_add(&ps_bridge->bridge); > + return 0; > + > +exit_remove_sysfs: > + sysfs_remove_group(&ps_bridge->page[0]->dev.kobj, &ps8640_attr_group); > +exit_dummy: > + while (--i) > + i2c_unregister_device(ps_bridge->page[i]); > + return ret; > +} > + > +static int ps8640_remove(struct i2c_client *client) > +{ > + struct ps8640 *ps_bridge = i2c_get_clientdata(client); > + int i = MAX_DEVS; > + > + drm_bridge_remove(&ps_bridge->bridge); > + sysfs_remove_group(&ps_bridge->page[0]->dev.kobj, &ps8640_attr_group); > + while (--i) > + i2c_unregister_device(ps_bridge->page[i]); > + > + return 0; > +} > + > +static const struct i2c_device_id ps8640_i2c_table[] = { > + { "ps8640", 0 }, > + { /* sentinel */ }, > +}; > +MODULE_DEVICE_TABLE(i2c, ps8640_i2c_table); > + > +static const struct of_device_id ps8640_match[] = { > + { .compatible = "parade,ps8640" }, > + { /* sentinel */ }, > +}; > +MODULE_DEVICE_TABLE(of, ps8640_match); > + > +static struct i2c_driver ps8640_driver = { > + .id_table = ps8640_i2c_table, > + .probe = ps8640_probe, > + .remove = ps8640_remove, > + .driver = { > + .name = "ps8640", > + .of_match_table = ps8640_match, > + }, > +}; > +module_i2c_driver(ps8640_driver); > + > +MODULE_AUTHOR("Jitao Shi <jitao.shi@mediatek.com>"); > +MODULE_AUTHOR("CK Hu <ck.hu@mediatek.com>"); > +MODULE_DESCRIPTION("PARADE ps8640 DSI-eDP converter driver"); > +MODULE_LICENSE("GPL v2"); >
diff --git a/drivers/gpu/drm/bridge/Kconfig b/drivers/gpu/drm/bridge/Kconfig index 1cc9f50..61c6415 100644 --- a/drivers/gpu/drm/bridge/Kconfig +++ b/drivers/gpu/drm/bridge/Kconfig @@ -82,6 +82,18 @@ config DRM_PARADE_PS8622 ---help--- Parade eDP-LVDS bridge chip driver. +config DRM_PARADE_PS8640 + tristate "Parade PS8640 MIPI DSI to eDP Converter" + depends on DRM + depends on OF + select DRM_KMS_HELPER + select DRM_MIPI_DSI + select DRM_PANEL + help + Choose this option if you have PS8640 for display + The PS8640 is a high-performance and low-power + MIPI DSI to eDP converter + config DRM_SIL_SII8620 tristate "Silicon Image SII8620 HDMI/MHL bridge" depends on OF diff --git a/drivers/gpu/drm/bridge/Makefile b/drivers/gpu/drm/bridge/Makefile index 4934fcf..14660ab 100644 --- a/drivers/gpu/drm/bridge/Makefile +++ b/drivers/gpu/drm/bridge/Makefile @@ -6,6 +6,7 @@ obj-$(CONFIG_DRM_LVDS_ENCODER) += lvds-encoder.o obj-$(CONFIG_DRM_MEGACHIPS_STDPXXXX_GE_B850V3_FW) += megachips-stdpxxxx-ge-b850v3-fw.o obj-$(CONFIG_DRM_NXP_PTN3460) += nxp-ptn3460.o obj-$(CONFIG_DRM_PARADE_PS8622) += parade-ps8622.o +obj-$(CONFIG_DRM_PARADE_PS8640) += parade-ps8640.o obj-$(CONFIG_DRM_SIL_SII8620) += sil-sii8620.o obj-$(CONFIG_DRM_SII902X) += sii902x.o obj-$(CONFIG_DRM_SII9234) += sii9234.o diff --git a/drivers/gpu/drm/bridge/parade-ps8640.c b/drivers/gpu/drm/bridge/parade-ps8640.c new file mode 100644 index 0000000..ac27010 --- /dev/null +++ b/drivers/gpu/drm/bridge/parade-ps8640.c @@ -0,0 +1,672 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2016 MediaTek Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <linux/delay.h> +#include <linux/err.h> +#include <linux/firmware.h> +#include <linux/gpio/consumer.h> +#include <linux/i2c.h> +#include <linux/module.h> +#include <linux/of_graph.h> +#include <linux/regulator/consumer.h> +#include <asm/unaligned.h> +#include <drm/drm_panel.h> + +#include <drm/drm_atomic_helper.h> +#include <drm/drm_crtc_helper.h> +#include <drm/drm_edid.h> +#include <drm/drm_mipi_dsi.h> +#include <drm/drm_print.h> +#include <drm/drm_probe_helper.h> + +#define PAGE1_VSTART 0x6b +#define PAGE2_SPI_CFG3 0x82 +#define I2C_TO_SPI_RESET 0x20 +#define PAGE2_ROMADD_BYTE1 0x8e +#define PAGE2_ROMADD_BYTE2 0x8f +#define PAGE2_SWSPI_WDATA 0x90 +#define PAGE2_SWSPI_RDATA 0x91 +#define PAGE2_SWSPI_LEN 0x92 +#define PAGE2_SWSPI_CTL 0x93 +#define TRIGGER_NO_READBACK 0x05 +#define TRIGGER_READBACK 0x01 +#define PAGE2_SPI_STATUS 0x9e +#define SPI_READY 0x0c +#define PAGE2_GPIO_L 0xa6 +#define PAGE2_GPIO_H 0xa7 +#define PS_GPIO9 BIT(1) +#define PAGE2_IROM_CTRL 0xb0 +#define IROM_ENABLE 0xc0 +#define IROM_DISABLE 0x80 +#define PAGE2_SW_RESET 0xbc +#define SPI_SW_RESET BIT(7) +#define MPU_SW_RESET BIT(6) +#define PAGE2_ENCTLSPI_WR 0xda +#define PAGE2_I2C_BYPASS 0xea +#define I2C_BYPASS_EN 0xd0 +#define PAGE2_MCS_EN 0xf3 +#define MCS_EN BIT(0) +#define PAGE3_SET_ADD 0xfe +#define PAGE3_SET_VAL 0xff +#define VDO_CTL_ADD 0x13 +#define VDO_DIS 0x18 +#define VDO_EN 0x1c +#define PAGE4_REV_L 0xf0 +#define PAGE4_REV_H 0xf1 +#define PAGE4_CHIP_L 0xf2 +#define PAGE4_CHIP_H 0xf3 + +#define PAGE0_DP_CNTL 0 +#define PAGE1_VDO_BDG 1 +#define PAGE2_TOP_CNTL 2 +#define PAGE3_DSI_CNTL1 3 +#define PAGE4_MIPI_PHY 4 +#define PAGE5_VPLL 5 +#define PAGE6_DSI_CNTL2 6 +#define PAGE7_SPI_CNTL 7 +#define MAX_DEVS 0x8 + +struct ps8640_info { + u8 family_id; + u8 variant_id; + u16 version; +}; + +struct ps8640 { + struct drm_connector connector; + struct drm_bridge bridge; + struct edid *edid; + struct mipi_dsi_device *dsi; + struct i2c_client *page[MAX_DEVS]; + struct regulator_bulk_data supplies[2]; + struct drm_panel *panel; + struct gpio_desc *gpio_reset; + struct gpio_desc *gpio_power_down; + struct gpio_desc *gpio_mode_sel; + bool enabled; + + /* firmware file info */ + struct ps8640_info info; + bool in_fw_update; + /* for firmware update protect */ + struct mutex fw_mutex; +}; + +static const u8 enc_ctrl_code[6] = { 0xaa, 0x55, 0x50, 0x41, 0x52, 0x44 }; +static const u8 hw_chip_id[4] = { 0x00, 0x0a, 0x00, 0x30 }; + +static inline struct ps8640 *bridge_to_ps8640(struct drm_bridge *e) +{ + return container_of(e, struct ps8640, bridge); +} + +static inline struct ps8640 *connector_to_ps8640(struct drm_connector *e) +{ + return container_of(e, struct ps8640, connector); +} + +static int ps8640_read(struct i2c_client *client, u8 reg, u8 *data, + u16 data_len) +{ + int ret; + struct i2c_msg msgs[] = { + { + .addr = client->addr, + .flags = 0, + .len = 1, + .buf = ®, + }, + { + .addr = client->addr, + .flags = I2C_M_RD, + .len = data_len, + .buf = data, + } + }; + + ret = i2c_transfer(client->adapter, msgs, 2); + + if (ret == 2) + return 0; + if (ret < 0) + return ret; + else + return -EIO; +} + +static int ps8640_write_bytes(struct i2c_client *client, const u8 *data, + u16 data_len) +{ + int ret; + struct i2c_msg msg; + + msg.addr = client->addr; + msg.flags = 0; + msg.len = data_len; + msg.buf = (u8 *)data; + + ret = i2c_transfer(client->adapter, &msg, 1); + if (ret == 1) + return 0; + if (ret < 0) + return ret; + else + return -EIO; +} + +static int ps8640_write_byte(struct i2c_client *client, u8 reg, u8 data) +{ + u8 buf[] = { reg, data }; + + return ps8640_write_bytes(client, buf, sizeof(buf)); +} + +static void ps8640_get_mcu_fw_version(struct ps8640 *ps_bridge) +{ + struct i2c_client *client = ps_bridge->page[PAGE5_VPLL]; + u8 fw_ver[2]; + + ps8640_read(client, 0x4, fw_ver, sizeof(fw_ver)); + ps_bridge->info.version = (fw_ver[0] << 8) | fw_ver[1]; + + DRM_INFO_ONCE("ps8640 rom fw version %d.%d\n", fw_ver[0], fw_ver[1]); +} + +static int ps8640_bridge_unmute(struct ps8640 *ps_bridge) +{ + struct i2c_client *client = ps_bridge->page[PAGE3_DSI_CNTL1]; + u8 vdo_ctrl_buf[3] = { PAGE3_SET_ADD, VDO_CTL_ADD, VDO_EN }; + + return ps8640_write_bytes(client, vdo_ctrl_buf, sizeof(vdo_ctrl_buf)); +} + +static int ps8640_bridge_mute(struct ps8640 *ps_bridge) +{ + struct i2c_client *client = ps_bridge->page[PAGE3_DSI_CNTL1]; + u8 vdo_ctrl_buf[3] = { PAGE3_SET_ADD, VDO_CTL_ADD, VDO_DIS }; + + return ps8640_write_bytes(client, vdo_ctrl_buf, sizeof(vdo_ctrl_buf)); +} + +static void ps8640_pre_enable(struct drm_bridge *bridge) +{ + struct ps8640 *ps_bridge = bridge_to_ps8640(bridge); + struct i2c_client *client = ps_bridge->page[PAGE2_TOP_CNTL]; + struct i2c_client *page1 = ps_bridge->page[PAGE1_VDO_BDG]; + int err; + u8 set_vdo_done, mcs_en, vstart; + ktime_t timeout; + + if (ps_bridge->in_fw_update) + return; + + if (ps_bridge->enabled) + return; + + err = drm_panel_prepare(ps_bridge->panel); + if (err < 0) { + DRM_ERROR("failed to prepare panel: %d\n", err); + return; + } + + err = regulator_bulk_enable(ARRAY_SIZE(ps_bridge->supplies), + ps_bridge->supplies); + if (err < 0) { + DRM_ERROR("cannot enable regulators %d\n", err); + goto err_panel_unprepare; + } + + gpiod_set_value(ps_bridge->gpio_power_down, 1); + gpiod_set_value(ps_bridge->gpio_reset, 0); + usleep_range(2000, 2500); + gpiod_set_value(ps_bridge->gpio_reset, 1); + + /* + * Wait for the ps8640 embed mcu ready + * First wait 200ms and then check the mcu ready flag every 20ms + */ + msleep(200); + + timeout = ktime_add_ms(ktime_get(), 200); + for (;;) { + err = ps8640_read(client, PAGE2_GPIO_H, &set_vdo_done, 1); + if (err < 0) { + DRM_ERROR("failed read PAGE2_GPIO_H: %d\n", err); + goto err_regulators_disable; + } + if ((set_vdo_done & PS_GPIO9) == PS_GPIO9) + break; + if (ktime_compare(ktime_get(), timeout) > 0) + break; + msleep(20); + } + + msleep(50); + + ps8640_read(page1, PAGE1_VSTART, &vstart, 1); + DRM_INFO("PS8640 PAGE1.0x6B = 0x%x\n", vstart); + + /** + * The Manufacturer Command Set (MCS) is a device dependent interface + * intended for factory programming of the display module default + * parameters. Once the display module is configured, the MCS shall be + * disabled by the manufacturer. Once disabled, all MCS commands are + * ignored by the display interface. + */ + ps8640_read(client, PAGE2_MCS_EN, &mcs_en, 1); + ps8640_write_byte(client, PAGE2_MCS_EN, mcs_en & ~MCS_EN); + + if (ps_bridge->info.version == 0) + ps8640_get_mcu_fw_version(ps_bridge); + + err = ps8640_bridge_unmute(ps_bridge); + if (err) + DRM_ERROR("failed to enable unmutevideo: %d\n", err); + /* Switch access edp panel's edid through i2c */ + ps8640_write_byte(client, PAGE2_I2C_BYPASS, I2C_BYPASS_EN); + ps_bridge->enabled = true; + + return; + +err_regulators_disable: + regulator_bulk_disable(ARRAY_SIZE(ps_bridge->supplies), + ps_bridge->supplies); +err_panel_unprepare: + drm_panel_unprepare(ps_bridge->panel); +} + +static void ps8640_enable(struct drm_bridge *bridge) +{ + struct ps8640 *ps_bridge = bridge_to_ps8640(bridge); + int err; + + err = drm_panel_enable(ps_bridge->panel); + if (err < 0) + DRM_ERROR("failed to enable panel: %d\n", err); +} + +static void ps8640_disable(struct drm_bridge *bridge) +{ + struct ps8640 *ps_bridge = bridge_to_ps8640(bridge); + int err; + + err = drm_panel_disable(ps_bridge->panel); + if (err < 0) + DRM_ERROR("failed to disable panel: %d\n", err); +} + +static void ps8640_post_disable(struct drm_bridge *bridge) +{ + struct ps8640 *ps_bridge = bridge_to_ps8640(bridge); + int err; + + if (ps_bridge->in_fw_update) + return; + + if (!ps_bridge->enabled) + return; + + ps_bridge->enabled = false; + + err = ps8640_bridge_mute(ps_bridge); + if (err < 0) + DRM_ERROR("failed to unmutevideo: %d\n", err); + + gpiod_set_value(ps_bridge->gpio_reset, 0); + gpiod_set_value(ps_bridge->gpio_power_down, 0); + err = regulator_bulk_disable(ARRAY_SIZE(ps_bridge->supplies), + ps_bridge->supplies); + if (err < 0) + DRM_ERROR("cannot disable regulators %d\n", err); + + err = drm_panel_unprepare(ps_bridge->panel); + if (err) + DRM_ERROR("failed to unprepare panel: %d\n", err); +} + +static int ps8640_get_modes(struct drm_connector *connector) +{ + struct ps8640 *ps_bridge = connector_to_ps8640(connector); + struct edid *edid; + int num_modes = 0; + bool power_off; + + if (ps_bridge->edid) + return drm_add_edid_modes(connector, ps_bridge->edid); + + power_off = !ps_bridge->enabled; + ps8640_pre_enable(&ps_bridge->bridge); + + edid = drm_get_edid(connector, ps_bridge->page[0]->adapter); + if (!edid) + goto out; + + ps_bridge->edid = edid; + drm_connector_update_edid_property(connector, ps_bridge->edid); + num_modes = drm_add_edid_modes(connector, ps_bridge->edid); + +out: + if (power_off) + ps8640_post_disable(&ps_bridge->bridge); + + return num_modes; +} + +static const struct drm_connector_helper_funcs ps8640_connector_helper_funcs = { + .get_modes = ps8640_get_modes, +}; + +static enum drm_connector_status ps8640_detect(struct drm_connector *connector, + bool force) +{ + return connector_status_connected; +} + +static const struct drm_connector_funcs ps8640_connector_funcs = { + .fill_modes = drm_helper_probe_single_connector_modes, + .detect = ps8640_detect, + .reset = drm_atomic_helper_connector_reset, + .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, + .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, +}; + +int ps8640_bridge_attach(struct drm_bridge *bridge) +{ + struct ps8640 *ps_bridge = bridge_to_ps8640(bridge); + struct device *dev = &ps_bridge->page[0]->dev; + struct device_node *in_ep, *dsi_node = NULL; + struct mipi_dsi_device *dsi; + struct mipi_dsi_host *host = NULL; + int ret; + const struct mipi_dsi_device_info info = { .type = "ps8640", + .channel = 0, + .node = NULL, + }; + + ret = drm_connector_init(bridge->dev, &ps_bridge->connector, + &ps8640_connector_funcs, + DRM_MODE_CONNECTOR_eDP); + + if (ret) { + DRM_ERROR("Failed to initialize connector with drm: %d\n", ret); + return ret; + } + + drm_connector_helper_add(&ps_bridge->connector, + &ps8640_connector_helper_funcs); + + ps_bridge->connector.dpms = DRM_MODE_DPMS_ON; + drm_connector_attach_encoder(&ps_bridge->connector, + bridge->encoder); + + if (ps_bridge->panel) + drm_panel_attach(ps_bridge->panel, &ps_bridge->connector); + + /* port@0 is ps8640 dsi input port */ + in_ep = of_graph_get_endpoint_by_regs(dev->of_node, 0, -1); + if (in_ep) { + dsi_node = of_graph_get_remote_port_parent(in_ep); + of_node_put(in_ep); + } + + if (dsi_node) { + host = of_find_mipi_dsi_host_by_node(dsi_node); + of_node_put(dsi_node); + if (!host) { + ret = -ENODEV; + goto err; + } + } + + dsi = mipi_dsi_device_register_full(host, &info); + if (IS_ERR(dsi)) { + dev_err(dev, "failed to create dsi device\n"); + ret = PTR_ERR(dsi); + goto err; + } + + ps_bridge->dsi = dsi; + + dsi->host = host; + dsi->mode_flags = MIPI_DSI_MODE_VIDEO | + MIPI_DSI_MODE_VIDEO_SYNC_PULSE; + dsi->format = MIPI_DSI_FMT_RGB888; + dsi->lanes = 4; + ret = mipi_dsi_attach(dsi); + if (ret) + goto err_dsi_attach; + + return 0; + +err_dsi_attach: + mipi_dsi_device_unregister(dsi); +err: + if (ps_bridge->panel) + drm_panel_detach(ps_bridge->panel); + drm_connector_cleanup(&ps_bridge->connector); + return ret; +} + +static const struct drm_bridge_funcs ps8640_bridge_funcs = { + .attach = ps8640_bridge_attach, + .disable = ps8640_disable, + .post_disable = ps8640_post_disable, + .pre_enable = ps8640_pre_enable, + .enable = ps8640_enable, +}; + +/* Firmware Version is returned as Major.Minor */ +static ssize_t fw_version_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct ps8640 *ps_bridge = dev_get_drvdata(dev); + struct ps8640_info *info = &ps_bridge->info; + + return scnprintf(buf, PAGE_SIZE, "%u.%u\n", info->version >> 8, + info->version & 0xff); +} + +/* Hardware Version is returned as FamilyID.VariantID */ +static ssize_t hw_version_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct ps8640 *ps_bridge = dev_get_drvdata(dev); + struct ps8640_info *info = &ps_bridge->info; + + return scnprintf(buf, PAGE_SIZE, "ps%u.%u\n", info->family_id, + info->variant_id); +} + +static DEVICE_ATTR_RO(fw_version); +static DEVICE_ATTR_RO(hw_version); + +static struct attribute *ps8640_attrs[] = { + &dev_attr_fw_version.attr, + &dev_attr_hw_version.attr, + NULL +}; + +static const struct attribute_group ps8640_attr_group = { + .attrs = ps8640_attrs, +}; + +static void ps8640_remove_sysfs_group(void *data) +{ + struct ps8640 *ps_bridge = data; + + sysfs_remove_group(&ps_bridge->page[0]->dev.kobj, &ps8640_attr_group); +} + +static int ps8640_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct device *dev = &client->dev; + struct ps8640 *ps_bridge; + struct device_node *np = dev->of_node; + struct device_node *port, *out_ep; + struct device_node *panel_node = NULL; + int ret; + u32 i; + + ps_bridge = devm_kzalloc(dev, sizeof(*ps_bridge), GFP_KERNEL); + if (!ps_bridge) + return -ENOMEM; + + /* port@1 is ps8640 output port */ + port = of_graph_get_port_by_id(np, 1); + if (port) { + out_ep = of_get_child_by_name(port, "endpoint"); + of_node_put(port); + if (out_ep) { + panel_node = of_graph_get_remote_port_parent(out_ep); + of_node_put(out_ep); + } + } + if (panel_node) { + ps_bridge->panel = of_drm_find_panel(panel_node); + of_node_put(panel_node); + if (IS_ERR(ps_bridge->panel)) + return PTR_ERR(ps_bridge->panel); + } + + mutex_init(&ps_bridge->fw_mutex); + ps_bridge->supplies[0].supply = "vdd33"; + ps_bridge->supplies[1].supply = "vdd12"; + ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(ps_bridge->supplies), + ps_bridge->supplies); + if (ret) { + dev_info(dev, "failed to get regulators: %d\n", ret); + return ret; + } + + ps_bridge->gpio_mode_sel = devm_gpiod_get_optional(&client->dev, + "mode-sel", + GPIOD_OUT_HIGH); + if (IS_ERR(ps_bridge->gpio_mode_sel)) { + ret = PTR_ERR(ps_bridge->gpio_mode_sel); + dev_err(dev, "cannot get mode-sel %d\n", ret); + return ret; + } + + ps_bridge->gpio_power_down = devm_gpiod_get(&client->dev, "sleep", + GPIOD_OUT_LOW); + if (IS_ERR(ps_bridge->gpio_power_down)) { + ret = PTR_ERR(ps_bridge->gpio_power_down); + dev_err(dev, "cannot get sleep: %d\n", ret); + return ret; + } + + /* + * Request the reset pin low to avoid the bridge being + * initialized prematurely + */ + ps_bridge->gpio_reset = devm_gpiod_get(&client->dev, "reset", + GPIOD_OUT_LOW); + if (IS_ERR(ps_bridge->gpio_reset)) { + ret = PTR_ERR(ps_bridge->gpio_reset); + dev_err(dev, "cannot get reset: %d\n", ret); + return ret; + } + + ps_bridge->bridge.funcs = &ps8640_bridge_funcs; + ps_bridge->bridge.of_node = dev->of_node; + + ps_bridge->page[0] = client; + + /* + * ps8640 uses multiple addresses, use dummy devices for them + * page[0]: for DP control + * page[1]: for VIDEO Bridge + * page[2]: for control top + * page[3]: for DSI Link Control1 + * page[4]: for MIPI Phy + * page[5]: for VPLL + * page[6]: for DSI Link Control2 + * page[7]: for spi rom mapping + */ + for (i = 1; i < MAX_DEVS; i++) { + ps_bridge->page[i] = i2c_new_dummy(client->adapter, + client->addr + i); + if (!ps_bridge->page[i]) { + dev_err(dev, "failed i2c dummy device, address%02x\n", + client->addr + i); + ret = -EBUSY; + goto exit_dummy; + } + } + i2c_set_clientdata(client, ps_bridge); + + ret = sysfs_create_group(&client->dev.kobj, &ps8640_attr_group); + if (ret) { + dev_err(dev, "failed to create sysfs entries: %d\n", ret); + goto exit_dummy; + } + + ret = devm_add_action(dev, ps8640_remove_sysfs_group, ps_bridge); + if (ret) { + dev_err(dev, "failed to add sysfs cleanup action: %d\n", ret); + goto exit_remove_sysfs; + } + + drm_bridge_add(&ps_bridge->bridge); + return 0; + +exit_remove_sysfs: + sysfs_remove_group(&ps_bridge->page[0]->dev.kobj, &ps8640_attr_group); +exit_dummy: + while (--i) + i2c_unregister_device(ps_bridge->page[i]); + return ret; +} + +static int ps8640_remove(struct i2c_client *client) +{ + struct ps8640 *ps_bridge = i2c_get_clientdata(client); + int i = MAX_DEVS; + + drm_bridge_remove(&ps_bridge->bridge); + sysfs_remove_group(&ps_bridge->page[0]->dev.kobj, &ps8640_attr_group); + while (--i) + i2c_unregister_device(ps_bridge->page[i]); + + return 0; +} + +static const struct i2c_device_id ps8640_i2c_table[] = { + { "ps8640", 0 }, + { /* sentinel */ }, +}; +MODULE_DEVICE_TABLE(i2c, ps8640_i2c_table); + +static const struct of_device_id ps8640_match[] = { + { .compatible = "parade,ps8640" }, + { /* sentinel */ }, +}; +MODULE_DEVICE_TABLE(of, ps8640_match); + +static struct i2c_driver ps8640_driver = { + .id_table = ps8640_i2c_table, + .probe = ps8640_probe, + .remove = ps8640_remove, + .driver = { + .name = "ps8640", + .of_match_table = ps8640_match, + }, +}; +module_i2c_driver(ps8640_driver); + +MODULE_AUTHOR("Jitao Shi <jitao.shi@mediatek.com>"); +MODULE_AUTHOR("CK Hu <ck.hu@mediatek.com>"); +MODULE_DESCRIPTION("PARADE ps8640 DSI-eDP converter driver"); +MODULE_LICENSE("GPL v2");