From patchwork Mon Dec 23 14:35:38 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Enric Balletbo i Serra X-Patchwork-Id: 11309429 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 4B01C921 for ; Tue, 24 Dec 2019 14:31:21 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 33BD7206D3 for ; Tue, 24 Dec 2019 14:31:21 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 33BD7206D3 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=collabora.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id D646F6E7E2; Tue, 24 Dec 2019 14:30:05 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from bhuna.collabora.co.uk (bhuna.collabora.co.uk [IPv6:2a00:1098:0:82:1000:25:2eeb:e3e3]) by gabe.freedesktop.org (Postfix) with ESMTPS id 167026E2B8 for ; Mon, 23 Dec 2019 14:35:50 +0000 (UTC) Received: from [127.0.0.1] (localhost [127.0.0.1]) (Authenticated sender: eballetbo) with ESMTPSA id 943CE2921D9 From: Enric Balletbo i Serra To: linux-kernel@vger.kernel.org Subject: [PATCH v22 2/2] drm/bridge: Add I2C based driver for ps8640 bridge Date: Mon, 23 Dec 2019 15:35:38 +0100 Message-Id: <20191223143538.20327-3-enric.balletbo@collabora.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20191223143538.20327-1-enric.balletbo@collabora.com> References: <20191223143538.20327-1-enric.balletbo@collabora.com> MIME-Version: 1.0 X-Mailman-Approved-At: Tue, 24 Dec 2019 14:29:55 +0000 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Ulrich Hecht , Jernej Skrabec , drinkcat@chromium.org, Jitao Shi , Jonas Karlman , David Airlie , Neil Armstrong , linux-mediatek@lists.infradead.org, dri-devel@lists.freedesktop.org, hsinyi@chromium.org, matthias.bgg@gmail.com, Collabora Kernel ML , linux-arm-kernel@lists.infradead.org, Laurent Pinchart Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" From: Jitao Shi This patch adds drm_bridge driver for parade DSI to eDP bridge chip. Signed-off-by: Jitao Shi Reviewed-by: Daniel Kurtz [uli: followed API changes, removed FW update feature] Signed-off-by: Ulrich Hecht Signed-off-by: Enric Balletbo i Serra Tested-by: Hsin-Yi Wang Reviewed-by: Ezequiel Garcia --- One of the reviews from Laurent was to use 'i2c_new_ancillary_device'. I didn't change this for two reasons. 1) It doesn't have a devm version, so the remove path is more simple using the devm_i2c_new_dummy_device family. 2) IIUC the ancillary function is useful when you want to retrieve the address from the firmware or DT, that's not really the case here, as we have a base address and fixed offset to the base address which I think is not configurable. Let me know if you still think that I should use the ancillary call. Changes in v23: - Merge mute/unmute functions into one (Nicolas Boichat) - Use enum for ENABLE/DISABLE instead of bool (Ezequiel Garcia) - Rename mute/unmute to vdo_control and fix error messages (Nicolas Boichat and Enric) - Add space between address and address parameter 'address%02x' (Nicolas Boichat) - Add Tested-by Hsin-Yi - Added me as author after the refactor Changes in v22: - Remove sysfs attributes because are not really used (Enric Balletbo) - Use enum for address page offsets (Ezequiel Garcia) - Remove enable tracking (Enric Balletbo) - Use panel_bridge API (Laurent Pinchart) - Do not use kernel-doc format for non kernel-doc formatted commands (Enric Balletbo) - Remove verbose message for PAGE1_VSTART command (Ezequiel Garcia) - Use time_is_after_jiffies idiom (Ezequiel Garcia) - Remove unused macros (Ezequiel Garcia) - Fix weird alignment in dsi->mode_flags (Laurent Pinchart) - Use drm_of_find_panel_or_bridge helper (Laurent Pinchart) - Remove mode-sel-gpios as is not used (Laurent Pinchart) - Remove error messages to get gpios as the core will already report it (Enric Balletbo) - Remove redundant message getting the regulators (Laurent Pinchart) - Rename sleep-gpios to powerdown-gpios (Laurent Pinchart) - Use ARRAY_SIZE(ps_bridge->page) instead of MAX_DEV when possible (Laurent Pinchart) - Fix race with userspace accessing the sysfs attributes (Laurent Pinchart) - Remove id_table as is only used on DR platforms (Laurent Pinchart) - Convert to new i2c device probe() (Laurent Pinchart) - Use i2c_smbus_read/write helpers instead of open coding it (Laurent Pinchart) - Remove unnused global variables (Laurent Pinchart) - Remove unnused fields in ps8640 struct (Laurent Pinchart) - Remove commented-out headers (Laurent Pinchart) Changes in v21: - Use devm_i2c_new_dummy_device and fix build issue using deprecated i2c_new_dummy - Fix build issue due missing drm_bridge.h - Do not remove in ps8640_remove device managed resources Changes in v19: - fixed return value of ps8640_probe() when no panel is found Changes in v18: - followed DRM API changes - use DEVICE_ATTR_RO() - remove firmware update code - add SPDX identifier Changes in 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 in v16: - Disable ps8640 DSI MCS Function. - Rename gpios name more clearly. - Tune the ps8640 power on sequence. Changes in 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 in 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 in 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 in v12: - fix hw_chip_id build warning Changes in 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 - 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 | 11 + drivers/gpu/drm/bridge/Makefile | 1 + drivers/gpu/drm/bridge/parade-ps8640.c | 348 +++++++++++++++++++++++++ 3 files changed, 360 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 4734f6993858..3e0a63011723 100644 --- a/drivers/gpu/drm/bridge/Kconfig +++ b/drivers/gpu/drm/bridge/Kconfig @@ -101,6 +101,17 @@ 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 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 1c0c92667ac4..91490c595b38 100644 --- a/drivers/gpu/drm/bridge/Makefile +++ b/drivers/gpu/drm/bridge/Makefile @@ -8,6 +8,7 @@ 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 000000000000..646ac649d175 --- /dev/null +++ b/drivers/gpu/drm/bridge/parade-ps8640.c @@ -0,0 +1,348 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2016 MediaTek Inc. + */ + +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include + +#define PAGE2_GPIO_H 0xa7 +#define PS_GPIO9 BIT(1) +#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 VDO_CTL_ADD 0x13 +#define VDO_DIS 0x18 +#define VDO_EN 0x1c + +/* + * PS8640 uses multiple addresses: + * 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 + */ +enum page_addr_offset { + PAGE0_DP_CNTL = 0, + PAGE1_VDO_BDG, + PAGE2_TOP_CNTL, + PAGE3_DSI_CNTL1, + PAGE4_MIPI_PHY, + PAGE5_VPLL, + PAGE6_DSI_CNTL2, + PAGE7_SPI_CNTL, + MAX_DEVS +}; + +enum ps8640_vdo_control { + DISABLE = VDO_DIS, + ENABLE = VDO_EN, +}; + +struct ps8640 { + struct drm_bridge bridge; + struct drm_bridge *panel_bridge; + struct mipi_dsi_device *dsi; + struct i2c_client *page[MAX_DEVS]; + struct regulator_bulk_data supplies[2]; + struct gpio_desc *gpio_reset; + struct gpio_desc *gpio_powerdown; +}; + +static inline struct ps8640 *bridge_to_ps8640(struct drm_bridge *e) +{ + return container_of(e, struct ps8640, bridge); +} + +static int ps8640_bridge_vdo_control(struct ps8640 *ps_bridge, + const enum ps8640_vdo_control ctrl) +{ + struct i2c_client *client = ps_bridge->page[PAGE3_DSI_CNTL1]; + u8 vdo_ctrl_buf[] = { VDO_CTL_ADD, ctrl }; + int ret; + + ret = i2c_smbus_write_i2c_block_data(client, PAGE3_SET_ADD, + sizeof(vdo_ctrl_buf), + vdo_ctrl_buf); + if (ret < 0) + return ret; + + return 0; +} + +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]; + unsigned long timeout; + int ret, status; + + ret = regulator_bulk_enable(ARRAY_SIZE(ps_bridge->supplies), + ps_bridge->supplies); + if (ret < 0) { + DRM_ERROR("cannot enable regulators %d\n", ret); + return; + } + + gpiod_set_value(ps_bridge->gpio_powerdown, 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 embedded MCU to be ready + * First wait 200ms and then check the MCU ready flag every 20ms + */ + msleep(200); + + timeout = jiffies + msecs_to_jiffies(200) + 1; + + while (time_is_after_jiffies(timeout)) { + status = i2c_smbus_read_byte_data(client, PAGE2_GPIO_H); + if (status < 0) { + DRM_ERROR("failed read PAGE2_GPIO_H: %d\n", status); + goto err_regulators_disable; + } + if ((status & PS_GPIO9) == PS_GPIO9) + break; + + msleep(20); + } + + msleep(50); + + /* + * 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. + */ + status = i2c_smbus_read_byte_data(client, PAGE2_MCS_EN); + if (status < 0) { + DRM_ERROR("failed read PAGE2_MCS_EN: %d\n", status); + goto err_regulators_disable; + } + + ret = i2c_smbus_write_byte_data(client, PAGE2_MCS_EN, + status & ~MCS_EN); + if (ret < 0) { + DRM_ERROR("failed write PAGE2_MCS_EN: %d\n", ret); + goto err_regulators_disable; + } + + ret = ps8640_bridge_vdo_control(ps_bridge, ENABLE); + if (ret) { + DRM_ERROR("failed to enable VDO: %d\n", ret); + goto err_regulators_disable; + } + + /* Switch access edp panel's edid through i2c */ + ret = i2c_smbus_write_byte_data(client, PAGE2_I2C_BYPASS, + I2C_BYPASS_EN); + if (ret < 0) { + DRM_ERROR("failed write PAGE2_I2C_BYPASS: %d\n", ret); + goto err_regulators_disable; + } + + return; + +err_regulators_disable: + regulator_bulk_disable(ARRAY_SIZE(ps_bridge->supplies), + ps_bridge->supplies); +} + +static void ps8640_post_disable(struct drm_bridge *bridge) +{ + struct ps8640 *ps_bridge = bridge_to_ps8640(bridge); + int ret; + + ret = ps8640_bridge_vdo_control(ps_bridge, DISABLE); + if (ret < 0) + DRM_ERROR("failed to disable VDO: %d\n", ret); + + gpiod_set_value(ps_bridge->gpio_reset, 0); + gpiod_set_value(ps_bridge->gpio_powerdown, 0); + ret = regulator_bulk_disable(ARRAY_SIZE(ps_bridge->supplies), + ps_bridge->supplies); + if (ret < 0) + DRM_ERROR("cannot disable regulators %d\n", ret); +} + +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; + struct mipi_dsi_device *dsi; + struct mipi_dsi_host *host; + int ret; + const struct mipi_dsi_device_info info = { .type = "ps8640", + .channel = 0, + .node = NULL, + }; + /* port@0 is ps8640 dsi input port */ + in_ep = of_graph_get_endpoint_by_regs(dev->of_node, 0, -1); + if (!in_ep) + return -ENODEV; + + dsi_node = of_graph_get_remote_port_parent(in_ep); + of_node_put(in_ep); + if (!dsi_node) + return -ENODEV; + + host = of_find_mipi_dsi_host_by_node(dsi_node); + of_node_put(dsi_node); + if (!host) + return -ENODEV; + + 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); + return ret; + } + + 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; + + /* Attach the panel-bridge to the dsi bridge */ + return drm_bridge_attach(bridge->encoder, ps_bridge->panel_bridge, + &ps_bridge->bridge); + +err_dsi_attach: + mipi_dsi_device_unregister(dsi); + return ret; +} + +static const struct drm_bridge_funcs ps8640_bridge_funcs = { + .attach = ps8640_bridge_attach, + .post_disable = ps8640_post_disable, + .pre_enable = ps8640_pre_enable, +}; + +static int ps8640_probe(struct i2c_client *client) +{ + struct device *dev = &client->dev; + struct device_node *np = dev->of_node; + struct ps8640 *ps_bridge; + struct drm_panel *panel; + 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 */ + ret = drm_of_find_panel_or_bridge(np, 1, 0, &panel, NULL); + if (ret < 0) + return ret; + if (!panel) + return -ENODEV; + + panel->connector_type = DRM_MODE_CONNECTOR_eDP; + + ps_bridge->panel_bridge = devm_drm_panel_bridge_add(dev, panel); + if (IS_ERR(ps_bridge->panel_bridge)) + return PTR_ERR(ps_bridge->panel_bridge); + + 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) + return ret; + + ps_bridge->gpio_powerdown = devm_gpiod_get(&client->dev, "powerdown", + GPIOD_OUT_LOW); + if (IS_ERR(ps_bridge->gpio_powerdown)) + return PTR_ERR(ps_bridge->gpio_powerdown); + + /* + * 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)) + return PTR_ERR(ps_bridge->gpio_reset); + + ps_bridge->bridge.funcs = &ps8640_bridge_funcs; + ps_bridge->bridge.of_node = dev->of_node; + + ps_bridge->page[PAGE0_DP_CNTL] = client; + + for (i = 1; i < ARRAY_SIZE(ps_bridge->page); i++) { + ps_bridge->page[i] = devm_i2c_new_dummy_device(&client->dev, + client->adapter, + client->addr + i); + if (IS_ERR(ps_bridge->page[i])) { + dev_err(dev, "failed i2c dummy device, address %02x\n", + client->addr + i); + return PTR_ERR(ps_bridge->page[i]); + } + } + + i2c_set_clientdata(client, ps_bridge); + + drm_bridge_add(&ps_bridge->bridge); + + return 0; +} + +static int ps8640_remove(struct i2c_client *client) +{ + struct ps8640 *ps_bridge = i2c_get_clientdata(client); + + drm_bridge_remove(&ps_bridge->bridge); + + return 0; +} + +static const struct of_device_id ps8640_match[] = { + { .compatible = "parade,ps8640" }, + { } +}; +MODULE_DEVICE_TABLE(of, ps8640_match); + +static struct i2c_driver ps8640_driver = { + .probe_new = ps8640_probe, + .remove = ps8640_remove, + .driver = { + .name = "ps8640", + .of_match_table = ps8640_match, + }, +}; +module_i2c_driver(ps8640_driver); + +MODULE_AUTHOR("Jitao Shi "); +MODULE_AUTHOR("CK Hu "); +MODULE_AUTHOR("Enric Balletbo i Serra "); +MODULE_DESCRIPTION("PARADE ps8640 DSI-eDP converter driver"); +MODULE_LICENSE("GPL v2");