| Message ID | 20181026144344.27778-21-jagan@amarulasolutions.com (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | drm/sun4i: Allwinner A64 MIPI-DSI support | expand |
On Fri, Oct 26, 2018 at 08:13:39PM +0530, Jagan Teki wrote: > Techstar TS8550B MIPI DSI panel is 480x854, 2-lane MIPI DSI > LCD panel. Add panel driver for it. > > Signed-off-by: Jagan Teki <jagan@amarulasolutions.com> > Tested-by: Jagan Teki <jagan@amarulasolutions.com> > --- > Changes for v3: > - new patch > Changes for v2: > - none > > drivers/gpu/drm/panel/Kconfig | 9 + > drivers/gpu/drm/panel/Makefile | 1 + > .../gpu/drm/panel/panel-techstar-ts8550b.c | 346 ++++++++++++++++++ > 3 files changed, 356 insertions(+) > create mode 100644 drivers/gpu/drm/panel/panel-techstar-ts8550b.c > > diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig > index 20b88c275421..d0d4e60f5153 100644 > --- a/drivers/gpu/drm/panel/Kconfig > +++ b/drivers/gpu/drm/panel/Kconfig > @@ -195,4 +195,13 @@ config DRM_PANEL_SITRONIX_ST7789V > Say Y here if you want to enable support for the Sitronix > ST7789V controller for 240x320 LCD panels > > +config DRM_PANEL_TECHSTAR_TS8550B > + tristate "Techstar TS8550B MIPI-DSI panel driver" > + depends on OF > + depends on DRM_MIPI_DSI > + depends on BACKLIGHT_CLASS_DEVICE > + help > + Say Y if you want to enable support for panels based on the > + Techstar TS8550B MIPI-DSI interface. > + > endmenu > diff --git a/drivers/gpu/drm/panel/Makefile b/drivers/gpu/drm/panel/Makefile > index 04696bb85218..88011f06edb8 100644 > --- a/drivers/gpu/drm/panel/Makefile > +++ b/drivers/gpu/drm/panel/Makefile > @@ -20,3 +20,4 @@ obj-$(CONFIG_DRM_PANEL_SEIKO_43WVF1G) += panel-seiko-43wvf1g.o > obj-$(CONFIG_DRM_PANEL_SHARP_LQ101R1SX01) += panel-sharp-lq101r1sx01.o > obj-$(CONFIG_DRM_PANEL_SHARP_LS043T1LE01) += panel-sharp-ls043t1le01.o > obj-$(CONFIG_DRM_PANEL_SITRONIX_ST7789V) += panel-sitronix-st7789v.o > +obj-$(CONFIG_DRM_PANEL_TECHSTAR_TS8550B) += panel-techstar-ts8550b.o > diff --git a/drivers/gpu/drm/panel/panel-techstar-ts8550b.c b/drivers/gpu/drm/panel/panel-techstar-ts8550b.c > new file mode 100644 > index 000000000000..8baca71595a7 > --- /dev/null > +++ b/drivers/gpu/drm/panel/panel-techstar-ts8550b.c > @@ -0,0 +1,346 @@ > +// SPDX-License-Identifier: GPL-2.0+ > +/* > + * Copyright (C) 2019, Amarula Solutions. > + * Author: Jagan Teki <jagan@amarulasolutions.com> > + */ > + > +#include <linux/backlight.h> > +#include <linux/delay.h> > +#include <linux/device.h> > +#include <linux/err.h> > +#include <linux/errno.h> > +#include <linux/fb.h> > +#include <linux/kernel.h> > +#include <linux/module.h> > + > +#include <linux/gpio/consumer.h> > +#include <linux/regulator/consumer.h> > + > +#include <drm/drm_mipi_dsi.h> > +#include <drm/drm_modes.h> > +#include <drm/drm_panel.h> > + > +#include <video/mipi_display.h> > + > +struct ts8550b { > + struct drm_panel panel; > + struct mipi_dsi_device *dsi; > + > + struct backlight_device *backlight; > + struct regulator *dvdd; > + struct regulator *avdd; > + struct gpio_desc *reset; > + > + bool is_enabled; > + bool is_prepared; > +}; > + > +static inline struct ts8550b *panel_to_ts8550b(struct drm_panel *panel) > +{ > + return container_of(panel, struct ts8550b, panel); > +} > + > +static inline int ts8550b_dcs_write_seq(struct ts8550b *ctx, const void *seq, > + size_t len) > +{ > + return mipi_dsi_dcs_write_buffer(ctx->dsi, seq, len); > +}; > + > +#define ts8550b_dcs_write_seq_static(ctx, seq...) \ > + ({ \ > + static const u8 d[] = { seq }; \ > + ts8550b_dcs_write_seq(ctx, d, ARRAY_SIZE(d)); \ > + }) > + > +static void ts8550b_init_sequence(struct ts8550b *ctx) This seems to be pretty "standard" MIPI-based display, utilizing bunch of manufacturer-specific commands during init sequence. Standard MIPI commands fall between 0x00..0xAF and are defined in <video/mipi.h> > +{ > + ts8550b_dcs_write_seq_static(ctx, 0x01, 0x00); MIPI_DCS_SOFT_RESET > + msleep(200); > + ts8550b_dcs_write_seq_static(ctx, 0xFF, 0x77, 0x01, 0x00, 0x00, 0x11); > + ts8550b_dcs_write_seq_static(ctx, 0xD1, 0x11); > + ts8550b_dcs_write_seq_static(ctx, 0x11, 0x00); MIPI_DCS_EXIT_SLEEP_MODE > + msleep(200); > + ts8550b_dcs_write_seq_static(ctx, 0xFF, 0x77, 0x01, 0x00, 0x00, 0x10); > + ts8550b_dcs_write_seq_static(ctx, 0xC0, 0xE9, 0x03); > + ts8550b_dcs_write_seq_static(ctx, 0xC1, 0x12, 0x02); > + ts8550b_dcs_write_seq_static(ctx, 0xC2, 0x07, 0x06); > + ts8550b_dcs_write_seq_static(ctx, 0xB0, 0x00, 0x0E, 0x15, 0x0F, 0x11, > + 0x08, 0x08, 0x08, 0x08, 0x23, 0x04, 0x13, > + 0x12, 0x2B, 0x34, 0x1F); > + ts8550b_dcs_write_seq_static(ctx, 0xB1, 0x00, 0x0E, 0x95, 0x0F, 0x13, > + 0x07, 0x09, 0x08, 0x08, 0x22, 0x04, 0x10, > + 0x0E, 0x2C, 0x34, 0x1F); > + ts8550b_dcs_write_seq_static(ctx, 0xFF, 0x77, 0x01, 0x00, 0x00, 0x11); > + ts8550b_dcs_write_seq_static(ctx, 0xB0, 0x45); > + ts8550b_dcs_write_seq_static(ctx, 0xB1, 0x13); > + ts8550b_dcs_write_seq_static(ctx, 0xB2, 0x07); > + ts8550b_dcs_write_seq_static(ctx, 0xB3, 0x80); > + ts8550b_dcs_write_seq_static(ctx, 0xB5, 0x47); > + ts8550b_dcs_write_seq_static(ctx, 0xB7, 0x85); > + ts8550b_dcs_write_seq_static(ctx, 0xB8, 0x20); > + ts8550b_dcs_write_seq_static(ctx, 0xB9, 0x11); > + ts8550b_dcs_write_seq_static(ctx, 0xC1, 0x78); > + ts8550b_dcs_write_seq_static(ctx, 0xC2, 0x78); > + ts8550b_dcs_write_seq_static(ctx, 0xD0, 0x88); > + msleep(100); > + ts8550b_dcs_write_seq_static(ctx, 0xE0, 0x00, 0x00, 0x02); > + ts8550b_dcs_write_seq_static(ctx, 0xE1, 0x0B, 0x00, 0x0D, 0x00, 0x0C, > + 0x00, 0x0E, 0x00, 0x00, 0x44, 0x44); > + ts8550b_dcs_write_seq_static(ctx, 0xE2, 0x33, 0x33, 0x44, 0x44, 0x64, > + 0x00, 0x66, 0x00, 0x65, 0x00, 0x67, 0x00, > + 0x00); > + ts8550b_dcs_write_seq_static(ctx, 0xE3, 0x00, 0x00, 0x33, 0x33); > + ts8550b_dcs_write_seq_static(ctx, 0xE4, 0x44, 0x44); > + ts8550b_dcs_write_seq_static(ctx, 0xE5, 0x0C, 0x78, 0x3C, 0xA0, 0x0E, > + 0x78, 0x3C, 0xA0, 0x10, 0x78, 0x3C, 0xA0, > + 0x12, 0x78, 0x3C, 0xA0); > + ts8550b_dcs_write_seq_static(ctx, 0xE6, 0x00, 0x00, 0x33, 0x33); > + ts8550b_dcs_write_seq_static(ctx, 0xE7, 0x44, 0x44); > + ts8550b_dcs_write_seq_static(ctx, 0xE8, 0x0D, 0x78, 0x3C, 0xA0, 0x0F, > + 0x78, 0x3C, 0xA0, 0x11, 0x78, 0x3C, 0xA0, > + 0x13, 0x78, 0x3C, 0xA0); > + ts8550b_dcs_write_seq_static(ctx, 0xEB, 0x02, 0x02, 0x39, 0x39, 0xEE, > + 0x44, 0x00); > + ts8550b_dcs_write_seq_static(ctx, 0xEC, 0x00, 0x00); > + ts8550b_dcs_write_seq_static(ctx, 0xED, 0xFF, 0xF1, 0x04, 0x56, 0x72, > + 0x3F, 0xFF, 0xFF, 0xFF, 0xFF, 0xF3, 0x27, > + 0x65, 0x40, 0x1F, 0xFF); > + ts8550b_dcs_write_seq_static(ctx, 0xFF, 0x77, 0x01, 0x00, 0x00, 0x00); > + msleep(10); > + ts8550b_dcs_write_seq_static(ctx, 0x29, 0x00); MIPI_DCS_SET_DISPLAY_ON > + msleep(200); > +} > + > +static int ts8550b_prepare(struct drm_panel *panel) > +{ > + struct ts8550b *ctx = panel_to_ts8550b(panel); > + int ret; > + > + if (ctx->is_prepared) > + return 0; > + > + gpiod_set_value(ctx->reset, 0); > + msleep(20); > + > + ret = regulator_enable(ctx->dvdd); > + if (ret) > + return ret; > + msleep(20); > + > + ret = regulator_enable(ctx->avdd); > + if (ret) > + return ret; > + msleep(20); > + > + gpiod_set_value(ctx->reset, 1); > + msleep(20); > + > + gpiod_set_value(ctx->reset, 0); > + msleep(30); > + > + gpiod_set_value(ctx->reset, 1); > + msleep(150); > + > + ts8550b_init_sequence(ctx); > + > + ctx->is_prepared = true; > + > + return 0; > +} > + > +static int ts8550b_enable(struct drm_panel *panel) > +{ > + struct ts8550b *ctx = panel_to_ts8550b(panel); > + > + if (ctx->is_enabled) > + return 0; > + > + msleep(120); > + > + backlight_enable(ctx->backlight); > + ctx->is_enabled = true; > + > + return 0; > +} > + > +static int ts8550b_disable(struct drm_panel *panel) > +{ > + struct ts8550b *ctx = panel_to_ts8550b(panel); > + > + if (!ctx->is_enabled) > + return 0; > + > + backlight_disable(ctx->backlight); > + ctx->is_enabled = false; > + > + return 0; > +} > + > +static int ts8550b_unprepare(struct drm_panel *panel) > +{ > + struct ts8550b *ctx = panel_to_ts8550b(panel); > + int ret; > + > + if (!ctx->is_prepared) > + return 0; > + > + ret = mipi_dsi_dcs_set_display_off(ctx->dsi); > + if (ret < 0) > + dev_err(panel->dev, "failed to set display off: %d\n", ret); > + > + ret = mipi_dsi_dcs_enter_sleep_mode(ctx->dsi); > + if (ret < 0) > + dev_err(panel->dev, "failed to enter sleep mode: %d\n", ret); > + > + msleep(120); > + > + regulator_disable(ctx->dvdd); > + > + regulator_disable(ctx->avdd); > + > + gpiod_set_value(ctx->reset, 0); > + > + gpiod_set_value(ctx->reset, 1); > + > + gpiod_set_value(ctx->reset, 0); > + > + ctx->is_prepared = false; > + > + return 0; > +} > + > +static const struct drm_display_mode default_mode = { > + .clock = 27500, > + .vrefresh = 60, > + > + .hdisplay = 480, > + .hsync_start = 480 + 38, > + .hsync_end = 480 + 38 + 12, > + .htotal = 480 + 38 + 12 + 12, > + > + .vdisplay = 854, > + .vsync_start = 854 + 18, > + .vsync_end = 854 + 18 + 8, > + .vtotal = 854 + 18 + 8 + 4, > +}; > + > +static int ts8550b_get_modes(struct drm_panel *panel) > +{ > + struct drm_connector *connector = panel->connector; > + struct ts8550b *ctx = panel_to_ts8550b(panel); > + struct drm_display_mode *mode; > + > + mode = drm_mode_duplicate(panel->drm, &default_mode); > + if (!mode) { > + dev_err(&ctx->dsi->dev, "failed to add mode %ux%ux@%u\n", > + default_mode.hdisplay, default_mode.vdisplay, > + default_mode.vrefresh); > + return -ENOMEM; > + } > + > + drm_mode_set_name(mode); > + > + mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED; > + drm_mode_probed_add(connector, mode); > + > + panel->connector->display_info.width_mm = 69; > + panel->connector->display_info.height_mm = 139; > + > + return 1; > +} > + > +static const struct drm_panel_funcs ts8550b_funcs = { > + .disable = ts8550b_disable, > + .unprepare = ts8550b_unprepare, > + .prepare = ts8550b_prepare, > + .enable = ts8550b_enable, > + .get_modes = ts8550b_get_modes, > +}; > + > +static int ts8550b_dsi_probe(struct mipi_dsi_device *dsi) > +{ > + struct device_node *np; > + struct ts8550b *ctx; > + int ret; > + > + ctx = devm_kzalloc(&dsi->dev, sizeof(*ctx), GFP_KERNEL); > + if (!ctx) > + return -ENOMEM; > + > + mipi_dsi_set_drvdata(dsi, ctx); > + ctx->dsi = dsi; > + > + drm_panel_init(&ctx->panel); > + ctx->panel.dev = &dsi->dev; > + ctx->panel.funcs = &ts8550b_funcs; > + > + ctx->dvdd = devm_regulator_get(&dsi->dev, "dvdd"); > + if (IS_ERR(ctx->dvdd)) { > + dev_err(&dsi->dev, "Couldn't get dvdd regulator\n"); > + return PTR_ERR(ctx->dvdd); > + } > + > + ctx->avdd = devm_regulator_get(&dsi->dev, "avdd"); > + if (IS_ERR(ctx->avdd)) { > + dev_err(&dsi->dev, "Couldn't get avdd regulator\n"); > + return PTR_ERR(ctx->avdd); > + } > + > + ctx->reset = devm_gpiod_get(&dsi->dev, "reset", GPIOD_OUT_LOW); > + if (IS_ERR(ctx->reset)) { > + dev_err(&dsi->dev, "Couldn't get our reset GPIO\n"); > + return PTR_ERR(ctx->reset); > + } > + > + np = of_parse_phandle(dsi->dev.of_node, "backlight", 0); > + if (np) { > + ctx->backlight = of_find_backlight_by_node(np); > + of_node_put(np); > + > + if (!ctx->backlight) > + return -EPROBE_DEFER; > + } > + > + ret = drm_panel_add(&ctx->panel); > + if (ret < 0) > + return ret; > + > + dsi->mode_flags = MIPI_DSI_MODE_VIDEO; > + dsi->format = MIPI_DSI_FMT_RGB888; > + dsi->lanes = 2; > + > + return mipi_dsi_attach(dsi); > +} > + > +static int ts8550b_dsi_remove(struct mipi_dsi_device *dsi) > +{ > + struct ts8550b *ctx = mipi_dsi_get_drvdata(dsi); > + > + mipi_dsi_detach(dsi); > + drm_panel_remove(&ctx->panel); > + > + if (ctx->backlight) > + put_device(&ctx->backlight->dev); > + > + return 0; > +} > + > +static const struct of_device_id ts8550b_of_match[] = { > + { .compatible = "techstar,ts8550b" }, > + { } > +}; > +MODULE_DEVICE_TABLE(of, ts8550b_of_match); > + > +static struct mipi_dsi_driver ts8550b_dsi_driver = { > + .probe = ts8550b_dsi_probe, > + .remove = ts8550b_dsi_remove, > + .driver = { > + .name = "techstar-ts8550b", > + .of_match_table = ts8550b_of_match, > + }, > +}; > +module_mipi_dsi_driver(ts8550b_dsi_driver); > + > +MODULE_AUTHOR("Jagan Teki <jagan@amarulasolutions.com>"); > +MODULE_DESCRIPTION("Techstar TS8550B MIPI-DSI LCD Panel Driver"); > +MODULE_LICENSE("GPL v2"); > -- > 2.18.0.321.gffc6fa0e3 > > -- > You received this message because you are subscribed to the Google Groups "linux-sunxi" group. > To unsubscribe from this group and stop receiving emails from it, send an email to linux-sunxi+unsubscribe@googlegroups.com. > For more options, visit https://groups.google.com/d/optout.
On Fri, Oct 26, 2018 at 9:43 PM Priit Laes <plaes@plaes.org> wrote: > > On Fri, Oct 26, 2018 at 08:13:39PM +0530, Jagan Teki wrote: > > Techstar TS8550B MIPI DSI panel is 480x854, 2-lane MIPI DSI > > LCD panel. Add panel driver for it. > > > > Signed-off-by: Jagan Teki <jagan@amarulasolutions.com> > > Tested-by: Jagan Teki <jagan@amarulasolutions.com> > > --- > > Changes for v3: > > - new patch > > Changes for v2: > > - none > > > > drivers/gpu/drm/panel/Kconfig | 9 + > > drivers/gpu/drm/panel/Makefile | 1 + > > .../gpu/drm/panel/panel-techstar-ts8550b.c | 346 ++++++++++++++++++ > > 3 files changed, 356 insertions(+) > > create mode 100644 drivers/gpu/drm/panel/panel-techstar-ts8550b.c > > > > diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig > > index 20b88c275421..d0d4e60f5153 100644 > > --- a/drivers/gpu/drm/panel/Kconfig > > +++ b/drivers/gpu/drm/panel/Kconfig > > @@ -195,4 +195,13 @@ config DRM_PANEL_SITRONIX_ST7789V > > Say Y here if you want to enable support for the Sitronix > > ST7789V controller for 240x320 LCD panels > > > > +config DRM_PANEL_TECHSTAR_TS8550B > > + tristate "Techstar TS8550B MIPI-DSI panel driver" > > + depends on OF > > + depends on DRM_MIPI_DSI > > + depends on BACKLIGHT_CLASS_DEVICE > > + help > > + Say Y if you want to enable support for panels based on the > > + Techstar TS8550B MIPI-DSI interface. > > + > > endmenu > > diff --git a/drivers/gpu/drm/panel/Makefile b/drivers/gpu/drm/panel/Makefile > > index 04696bb85218..88011f06edb8 100644 > > --- a/drivers/gpu/drm/panel/Makefile > > +++ b/drivers/gpu/drm/panel/Makefile > > @@ -20,3 +20,4 @@ obj-$(CONFIG_DRM_PANEL_SEIKO_43WVF1G) += panel-seiko-43wvf1g.o > > obj-$(CONFIG_DRM_PANEL_SHARP_LQ101R1SX01) += panel-sharp-lq101r1sx01.o > > obj-$(CONFIG_DRM_PANEL_SHARP_LS043T1LE01) += panel-sharp-ls043t1le01.o > > obj-$(CONFIG_DRM_PANEL_SITRONIX_ST7789V) += panel-sitronix-st7789v.o > > +obj-$(CONFIG_DRM_PANEL_TECHSTAR_TS8550B) += panel-techstar-ts8550b.o > > diff --git a/drivers/gpu/drm/panel/panel-techstar-ts8550b.c b/drivers/gpu/drm/panel/panel-techstar-ts8550b.c > > new file mode 100644 > > index 000000000000..8baca71595a7 > > --- /dev/null > > +++ b/drivers/gpu/drm/panel/panel-techstar-ts8550b.c > > @@ -0,0 +1,346 @@ > > +// SPDX-License-Identifier: GPL-2.0+ > > +/* > > + * Copyright (C) 2019, Amarula Solutions. > > + * Author: Jagan Teki <jagan@amarulasolutions.com> > > + */ > > + > > +#include <linux/backlight.h> > > +#include <linux/delay.h> > > +#include <linux/device.h> > > +#include <linux/err.h> > > +#include <linux/errno.h> > > +#include <linux/fb.h> > > +#include <linux/kernel.h> > > +#include <linux/module.h> > > + > > +#include <linux/gpio/consumer.h> > > +#include <linux/regulator/consumer.h> > > + > > +#include <drm/drm_mipi_dsi.h> > > +#include <drm/drm_modes.h> > > +#include <drm/drm_panel.h> > > + > > +#include <video/mipi_display.h> > > + > > +struct ts8550b { > > + struct drm_panel panel; > > + struct mipi_dsi_device *dsi; > > + > > + struct backlight_device *backlight; > > + struct regulator *dvdd; > > + struct regulator *avdd; > > + struct gpio_desc *reset; > > + > > + bool is_enabled; > > + bool is_prepared; > > +}; > > + > > +static inline struct ts8550b *panel_to_ts8550b(struct drm_panel *panel) > > +{ > > + return container_of(panel, struct ts8550b, panel); > > +} > > + > > +static inline int ts8550b_dcs_write_seq(struct ts8550b *ctx, const void *seq, > > + size_t len) > > +{ > > + return mipi_dsi_dcs_write_buffer(ctx->dsi, seq, len); > > +}; > > + > > +#define ts8550b_dcs_write_seq_static(ctx, seq...) \ > > + ({ \ > > + static const u8 d[] = { seq }; \ > > + ts8550b_dcs_write_seq(ctx, d, ARRAY_SIZE(d)); \ > > + }) > > + > > +static void ts8550b_init_sequence(struct ts8550b *ctx) > > This seems to be pretty "standard" MIPI-based display, utilizing > bunch of manufacturer-specific commands during init sequence. > > Standard MIPI commands fall between 0x00..0xAF and are defined in <video/mipi.h> Where is this file? we have include/video/mipi_display.h with 0x00..0xA8. Not all commands in sequence is listed in this, may be I will update DCS commands macros and rest as-it-is. what do you think?
On Sat, Oct 27, 2018 at 03:25:29PM +0530, Jagan Teki wrote: > On Fri, Oct 26, 2018 at 9:43 PM Priit Laes <plaes@plaes.org> wrote: > > > > On Fri, Oct 26, 2018 at 08:13:39PM +0530, Jagan Teki wrote: > > > Techstar TS8550B MIPI DSI panel is 480x854, 2-lane MIPI DSI > > > LCD panel. Add panel driver for it. > > > > > > Signed-off-by: Jagan Teki <jagan@amarulasolutions.com> > > > Tested-by: Jagan Teki <jagan@amarulasolutions.com> > > > --- > > > Changes for v3: > > > - new patch > > > Changes for v2: > > > - none > > > > > > drivers/gpu/drm/panel/Kconfig | 9 + > > > drivers/gpu/drm/panel/Makefile | 1 + > > > .../gpu/drm/panel/panel-techstar-ts8550b.c | 346 ++++++++++++++++++ > > > 3 files changed, 356 insertions(+) > > > create mode 100644 drivers/gpu/drm/panel/panel-techstar-ts8550b.c > > > > > > diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig > > > index 20b88c275421..d0d4e60f5153 100644 > > > --- a/drivers/gpu/drm/panel/Kconfig > > > +++ b/drivers/gpu/drm/panel/Kconfig > > > @@ -195,4 +195,13 @@ config DRM_PANEL_SITRONIX_ST7789V > > > Say Y here if you want to enable support for the Sitronix > > > ST7789V controller for 240x320 LCD panels > > > > > > +config DRM_PANEL_TECHSTAR_TS8550B > > > + tristate "Techstar TS8550B MIPI-DSI panel driver" > > > + depends on OF > > > + depends on DRM_MIPI_DSI > > > + depends on BACKLIGHT_CLASS_DEVICE > > > + help > > > + Say Y if you want to enable support for panels based on the > > > + Techstar TS8550B MIPI-DSI interface. > > > + > > > endmenu > > > diff --git a/drivers/gpu/drm/panel/Makefile b/drivers/gpu/drm/panel/Makefile > > > index 04696bb85218..88011f06edb8 100644 > > > --- a/drivers/gpu/drm/panel/Makefile > > > +++ b/drivers/gpu/drm/panel/Makefile > > > @@ -20,3 +20,4 @@ obj-$(CONFIG_DRM_PANEL_SEIKO_43WVF1G) += panel-seiko-43wvf1g.o > > > obj-$(CONFIG_DRM_PANEL_SHARP_LQ101R1SX01) += panel-sharp-lq101r1sx01.o > > > obj-$(CONFIG_DRM_PANEL_SHARP_LS043T1LE01) += panel-sharp-ls043t1le01.o > > > obj-$(CONFIG_DRM_PANEL_SITRONIX_ST7789V) += panel-sitronix-st7789v.o > > > +obj-$(CONFIG_DRM_PANEL_TECHSTAR_TS8550B) += panel-techstar-ts8550b.o > > > diff --git a/drivers/gpu/drm/panel/panel-techstar-ts8550b.c b/drivers/gpu/drm/panel/panel-techstar-ts8550b.c > > > new file mode 100644 > > > index 000000000000..8baca71595a7 > > > --- /dev/null > > > +++ b/drivers/gpu/drm/panel/panel-techstar-ts8550b.c > > > @@ -0,0 +1,346 @@ > > > +// SPDX-License-Identifier: GPL-2.0+ > > > +/* > > > + * Copyright (C) 2019, Amarula Solutions. > > > + * Author: Jagan Teki <jagan@amarulasolutions.com> > > > + */ > > > + > > > +#include <linux/backlight.h> > > > +#include <linux/delay.h> > > > +#include <linux/device.h> > > > +#include <linux/err.h> > > > +#include <linux/errno.h> > > > +#include <linux/fb.h> > > > +#include <linux/kernel.h> > > > +#include <linux/module.h> > > > + > > > +#include <linux/gpio/consumer.h> > > > +#include <linux/regulator/consumer.h> > > > + > > > +#include <drm/drm_mipi_dsi.h> > > > +#include <drm/drm_modes.h> > > > +#include <drm/drm_panel.h> > > > + > > > +#include <video/mipi_display.h> > > > + > > > +struct ts8550b { > > > + struct drm_panel panel; > > > + struct mipi_dsi_device *dsi; > > > + > > > + struct backlight_device *backlight; > > > + struct regulator *dvdd; > > > + struct regulator *avdd; > > > + struct gpio_desc *reset; > > > + > > > + bool is_enabled; > > > + bool is_prepared; > > > +}; > > > + > > > +static inline struct ts8550b *panel_to_ts8550b(struct drm_panel *panel) > > > +{ > > > + return container_of(panel, struct ts8550b, panel); > > > +} > > > + > > > +static inline int ts8550b_dcs_write_seq(struct ts8550b *ctx, const void *seq, > > > + size_t len) > > > +{ > > > + return mipi_dsi_dcs_write_buffer(ctx->dsi, seq, len); > > > +}; > > > + > > > +#define ts8550b_dcs_write_seq_static(ctx, seq...) \ > > > + ({ \ > > > + static const u8 d[] = { seq }; \ > > > + ts8550b_dcs_write_seq(ctx, d, ARRAY_SIZE(d)); \ > > > + }) > > > + > > > +static void ts8550b_init_sequence(struct ts8550b *ctx) > > > > This seems to be pretty "standard" MIPI-based display, utilizing > > bunch of manufacturer-specific commands during init sequence. > > > > Standard MIPI commands fall between 0x00..0xAF and are defined in <video/mipi.h> > > Where is this file? we have include/video/mipi_display.h with > 0x00..0xA8. Not all commands in sequence is listed in this, may be I > will update DCS commands macros and rest as-it-is. what do you think? Yeah, include/video/mipi_display.h is the header file I was referring to. Although those three commands I pointed out look like standard DCS command defines and the order makes sense too: SOFT_RESET -> magic1 -> EXIT_SLEEP_MODE -> magic2 -> SET_DISPLAY_ON Until someone finds proper datasheet for this device, those magic1 and magic2 sequenses remain mystery... Päikest, Priit :)
diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig index 20b88c275421..d0d4e60f5153 100644 --- a/drivers/gpu/drm/panel/Kconfig +++ b/drivers/gpu/drm/panel/Kconfig @@ -195,4 +195,13 @@ config DRM_PANEL_SITRONIX_ST7789V Say Y here if you want to enable support for the Sitronix ST7789V controller for 240x320 LCD panels +config DRM_PANEL_TECHSTAR_TS8550B + tristate "Techstar TS8550B MIPI-DSI panel driver" + depends on OF + depends on DRM_MIPI_DSI + depends on BACKLIGHT_CLASS_DEVICE + help + Say Y if you want to enable support for panels based on the + Techstar TS8550B MIPI-DSI interface. + endmenu diff --git a/drivers/gpu/drm/panel/Makefile b/drivers/gpu/drm/panel/Makefile index 04696bb85218..88011f06edb8 100644 --- a/drivers/gpu/drm/panel/Makefile +++ b/drivers/gpu/drm/panel/Makefile @@ -20,3 +20,4 @@ obj-$(CONFIG_DRM_PANEL_SEIKO_43WVF1G) += panel-seiko-43wvf1g.o obj-$(CONFIG_DRM_PANEL_SHARP_LQ101R1SX01) += panel-sharp-lq101r1sx01.o obj-$(CONFIG_DRM_PANEL_SHARP_LS043T1LE01) += panel-sharp-ls043t1le01.o obj-$(CONFIG_DRM_PANEL_SITRONIX_ST7789V) += panel-sitronix-st7789v.o +obj-$(CONFIG_DRM_PANEL_TECHSTAR_TS8550B) += panel-techstar-ts8550b.o diff --git a/drivers/gpu/drm/panel/panel-techstar-ts8550b.c b/drivers/gpu/drm/panel/panel-techstar-ts8550b.c new file mode 100644 index 000000000000..8baca71595a7 --- /dev/null +++ b/drivers/gpu/drm/panel/panel-techstar-ts8550b.c @@ -0,0 +1,346 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (C) 2019, Amarula Solutions. + * Author: Jagan Teki <jagan@amarulasolutions.com> + */ + +#include <linux/backlight.h> +#include <linux/delay.h> +#include <linux/device.h> +#include <linux/err.h> +#include <linux/errno.h> +#include <linux/fb.h> +#include <linux/kernel.h> +#include <linux/module.h> + +#include <linux/gpio/consumer.h> +#include <linux/regulator/consumer.h> + +#include <drm/drm_mipi_dsi.h> +#include <drm/drm_modes.h> +#include <drm/drm_panel.h> + +#include <video/mipi_display.h> + +struct ts8550b { + struct drm_panel panel; + struct mipi_dsi_device *dsi; + + struct backlight_device *backlight; + struct regulator *dvdd; + struct regulator *avdd; + struct gpio_desc *reset; + + bool is_enabled; + bool is_prepared; +}; + +static inline struct ts8550b *panel_to_ts8550b(struct drm_panel *panel) +{ + return container_of(panel, struct ts8550b, panel); +} + +static inline int ts8550b_dcs_write_seq(struct ts8550b *ctx, const void *seq, + size_t len) +{ + return mipi_dsi_dcs_write_buffer(ctx->dsi, seq, len); +}; + +#define ts8550b_dcs_write_seq_static(ctx, seq...) \ + ({ \ + static const u8 d[] = { seq }; \ + ts8550b_dcs_write_seq(ctx, d, ARRAY_SIZE(d)); \ + }) + +static void ts8550b_init_sequence(struct ts8550b *ctx) +{ + ts8550b_dcs_write_seq_static(ctx, 0x01, 0x00); + msleep(200); + ts8550b_dcs_write_seq_static(ctx, 0xFF, 0x77, 0x01, 0x00, 0x00, 0x11); + ts8550b_dcs_write_seq_static(ctx, 0xD1, 0x11); + ts8550b_dcs_write_seq_static(ctx, 0x11, 0x00); + msleep(200); + ts8550b_dcs_write_seq_static(ctx, 0xFF, 0x77, 0x01, 0x00, 0x00, 0x10); + ts8550b_dcs_write_seq_static(ctx, 0xC0, 0xE9, 0x03); + ts8550b_dcs_write_seq_static(ctx, 0xC1, 0x12, 0x02); + ts8550b_dcs_write_seq_static(ctx, 0xC2, 0x07, 0x06); + ts8550b_dcs_write_seq_static(ctx, 0xB0, 0x00, 0x0E, 0x15, 0x0F, 0x11, + 0x08, 0x08, 0x08, 0x08, 0x23, 0x04, 0x13, + 0x12, 0x2B, 0x34, 0x1F); + ts8550b_dcs_write_seq_static(ctx, 0xB1, 0x00, 0x0E, 0x95, 0x0F, 0x13, + 0x07, 0x09, 0x08, 0x08, 0x22, 0x04, 0x10, + 0x0E, 0x2C, 0x34, 0x1F); + ts8550b_dcs_write_seq_static(ctx, 0xFF, 0x77, 0x01, 0x00, 0x00, 0x11); + ts8550b_dcs_write_seq_static(ctx, 0xB0, 0x45); + ts8550b_dcs_write_seq_static(ctx, 0xB1, 0x13); + ts8550b_dcs_write_seq_static(ctx, 0xB2, 0x07); + ts8550b_dcs_write_seq_static(ctx, 0xB3, 0x80); + ts8550b_dcs_write_seq_static(ctx, 0xB5, 0x47); + ts8550b_dcs_write_seq_static(ctx, 0xB7, 0x85); + ts8550b_dcs_write_seq_static(ctx, 0xB8, 0x20); + ts8550b_dcs_write_seq_static(ctx, 0xB9, 0x11); + ts8550b_dcs_write_seq_static(ctx, 0xC1, 0x78); + ts8550b_dcs_write_seq_static(ctx, 0xC2, 0x78); + ts8550b_dcs_write_seq_static(ctx, 0xD0, 0x88); + msleep(100); + ts8550b_dcs_write_seq_static(ctx, 0xE0, 0x00, 0x00, 0x02); + ts8550b_dcs_write_seq_static(ctx, 0xE1, 0x0B, 0x00, 0x0D, 0x00, 0x0C, + 0x00, 0x0E, 0x00, 0x00, 0x44, 0x44); + ts8550b_dcs_write_seq_static(ctx, 0xE2, 0x33, 0x33, 0x44, 0x44, 0x64, + 0x00, 0x66, 0x00, 0x65, 0x00, 0x67, 0x00, + 0x00); + ts8550b_dcs_write_seq_static(ctx, 0xE3, 0x00, 0x00, 0x33, 0x33); + ts8550b_dcs_write_seq_static(ctx, 0xE4, 0x44, 0x44); + ts8550b_dcs_write_seq_static(ctx, 0xE5, 0x0C, 0x78, 0x3C, 0xA0, 0x0E, + 0x78, 0x3C, 0xA0, 0x10, 0x78, 0x3C, 0xA0, + 0x12, 0x78, 0x3C, 0xA0); + ts8550b_dcs_write_seq_static(ctx, 0xE6, 0x00, 0x00, 0x33, 0x33); + ts8550b_dcs_write_seq_static(ctx, 0xE7, 0x44, 0x44); + ts8550b_dcs_write_seq_static(ctx, 0xE8, 0x0D, 0x78, 0x3C, 0xA0, 0x0F, + 0x78, 0x3C, 0xA0, 0x11, 0x78, 0x3C, 0xA0, + 0x13, 0x78, 0x3C, 0xA0); + ts8550b_dcs_write_seq_static(ctx, 0xEB, 0x02, 0x02, 0x39, 0x39, 0xEE, + 0x44, 0x00); + ts8550b_dcs_write_seq_static(ctx, 0xEC, 0x00, 0x00); + ts8550b_dcs_write_seq_static(ctx, 0xED, 0xFF, 0xF1, 0x04, 0x56, 0x72, + 0x3F, 0xFF, 0xFF, 0xFF, 0xFF, 0xF3, 0x27, + 0x65, 0x40, 0x1F, 0xFF); + ts8550b_dcs_write_seq_static(ctx, 0xFF, 0x77, 0x01, 0x00, 0x00, 0x00); + msleep(10); + ts8550b_dcs_write_seq_static(ctx, 0x29, 0x00); + msleep(200); +} + +static int ts8550b_prepare(struct drm_panel *panel) +{ + struct ts8550b *ctx = panel_to_ts8550b(panel); + int ret; + + if (ctx->is_prepared) + return 0; + + gpiod_set_value(ctx->reset, 0); + msleep(20); + + ret = regulator_enable(ctx->dvdd); + if (ret) + return ret; + msleep(20); + + ret = regulator_enable(ctx->avdd); + if (ret) + return ret; + msleep(20); + + gpiod_set_value(ctx->reset, 1); + msleep(20); + + gpiod_set_value(ctx->reset, 0); + msleep(30); + + gpiod_set_value(ctx->reset, 1); + msleep(150); + + ts8550b_init_sequence(ctx); + + ctx->is_prepared = true; + + return 0; +} + +static int ts8550b_enable(struct drm_panel *panel) +{ + struct ts8550b *ctx = panel_to_ts8550b(panel); + + if (ctx->is_enabled) + return 0; + + msleep(120); + + backlight_enable(ctx->backlight); + ctx->is_enabled = true; + + return 0; +} + +static int ts8550b_disable(struct drm_panel *panel) +{ + struct ts8550b *ctx = panel_to_ts8550b(panel); + + if (!ctx->is_enabled) + return 0; + + backlight_disable(ctx->backlight); + ctx->is_enabled = false; + + return 0; +} + +static int ts8550b_unprepare(struct drm_panel *panel) +{ + struct ts8550b *ctx = panel_to_ts8550b(panel); + int ret; + + if (!ctx->is_prepared) + return 0; + + ret = mipi_dsi_dcs_set_display_off(ctx->dsi); + if (ret < 0) + dev_err(panel->dev, "failed to set display off: %d\n", ret); + + ret = mipi_dsi_dcs_enter_sleep_mode(ctx->dsi); + if (ret < 0) + dev_err(panel->dev, "failed to enter sleep mode: %d\n", ret); + + msleep(120); + + regulator_disable(ctx->dvdd); + + regulator_disable(ctx->avdd); + + gpiod_set_value(ctx->reset, 0); + + gpiod_set_value(ctx->reset, 1); + + gpiod_set_value(ctx->reset, 0); + + ctx->is_prepared = false; + + return 0; +} + +static const struct drm_display_mode default_mode = { + .clock = 27500, + .vrefresh = 60, + + .hdisplay = 480, + .hsync_start = 480 + 38, + .hsync_end = 480 + 38 + 12, + .htotal = 480 + 38 + 12 + 12, + + .vdisplay = 854, + .vsync_start = 854 + 18, + .vsync_end = 854 + 18 + 8, + .vtotal = 854 + 18 + 8 + 4, +}; + +static int ts8550b_get_modes(struct drm_panel *panel) +{ + struct drm_connector *connector = panel->connector; + struct ts8550b *ctx = panel_to_ts8550b(panel); + struct drm_display_mode *mode; + + mode = drm_mode_duplicate(panel->drm, &default_mode); + if (!mode) { + dev_err(&ctx->dsi->dev, "failed to add mode %ux%ux@%u\n", + default_mode.hdisplay, default_mode.vdisplay, + default_mode.vrefresh); + return -ENOMEM; + } + + drm_mode_set_name(mode); + + mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED; + drm_mode_probed_add(connector, mode); + + panel->connector->display_info.width_mm = 69; + panel->connector->display_info.height_mm = 139; + + return 1; +} + +static const struct drm_panel_funcs ts8550b_funcs = { + .disable = ts8550b_disable, + .unprepare = ts8550b_unprepare, + .prepare = ts8550b_prepare, + .enable = ts8550b_enable, + .get_modes = ts8550b_get_modes, +}; + +static int ts8550b_dsi_probe(struct mipi_dsi_device *dsi) +{ + struct device_node *np; + struct ts8550b *ctx; + int ret; + + ctx = devm_kzalloc(&dsi->dev, sizeof(*ctx), GFP_KERNEL); + if (!ctx) + return -ENOMEM; + + mipi_dsi_set_drvdata(dsi, ctx); + ctx->dsi = dsi; + + drm_panel_init(&ctx->panel); + ctx->panel.dev = &dsi->dev; + ctx->panel.funcs = &ts8550b_funcs; + + ctx->dvdd = devm_regulator_get(&dsi->dev, "dvdd"); + if (IS_ERR(ctx->dvdd)) { + dev_err(&dsi->dev, "Couldn't get dvdd regulator\n"); + return PTR_ERR(ctx->dvdd); + } + + ctx->avdd = devm_regulator_get(&dsi->dev, "avdd"); + if (IS_ERR(ctx->avdd)) { + dev_err(&dsi->dev, "Couldn't get avdd regulator\n"); + return PTR_ERR(ctx->avdd); + } + + ctx->reset = devm_gpiod_get(&dsi->dev, "reset", GPIOD_OUT_LOW); + if (IS_ERR(ctx->reset)) { + dev_err(&dsi->dev, "Couldn't get our reset GPIO\n"); + return PTR_ERR(ctx->reset); + } + + np = of_parse_phandle(dsi->dev.of_node, "backlight", 0); + if (np) { + ctx->backlight = of_find_backlight_by_node(np); + of_node_put(np); + + if (!ctx->backlight) + return -EPROBE_DEFER; + } + + ret = drm_panel_add(&ctx->panel); + if (ret < 0) + return ret; + + dsi->mode_flags = MIPI_DSI_MODE_VIDEO; + dsi->format = MIPI_DSI_FMT_RGB888; + dsi->lanes = 2; + + return mipi_dsi_attach(dsi); +} + +static int ts8550b_dsi_remove(struct mipi_dsi_device *dsi) +{ + struct ts8550b *ctx = mipi_dsi_get_drvdata(dsi); + + mipi_dsi_detach(dsi); + drm_panel_remove(&ctx->panel); + + if (ctx->backlight) + put_device(&ctx->backlight->dev); + + return 0; +} + +static const struct of_device_id ts8550b_of_match[] = { + { .compatible = "techstar,ts8550b" }, + { } +}; +MODULE_DEVICE_TABLE(of, ts8550b_of_match); + +static struct mipi_dsi_driver ts8550b_dsi_driver = { + .probe = ts8550b_dsi_probe, + .remove = ts8550b_dsi_remove, + .driver = { + .name = "techstar-ts8550b", + .of_match_table = ts8550b_of_match, + }, +}; +module_mipi_dsi_driver(ts8550b_dsi_driver); + +MODULE_AUTHOR("Jagan Teki <jagan@amarulasolutions.com>"); +MODULE_DESCRIPTION("Techstar TS8550B MIPI-DSI LCD Panel Driver"); +MODULE_LICENSE("GPL v2");