| Message ID | 3a7d3e17e37819fa0a198a37d0c2f54de7b93971.1729630039.git.jahau@rocketmail.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | Add new panel driver Samsung S6E88A0-AMS427AP24 | expand |
Hi, On 22/10/2024 23:33, Jakob Hauser wrote: > This initial part of the panel driver was mostly generated by the > "linux-mdss-dsi-panel-driver-generator" tool [1], reading downstream > Android kernel file "dsi_panel_S6E88A0_AMS427AP24_qhd_octa_video.dtsi" [2]. > > On top of the generic output of the tool, there were a couple of changes > applied: > - Added mipi_dsi_dcs_set_display_on() to function s6e88a0_ams427ap24_on(), > otherwise the display does not show up. > - In functions s6e88a0_ams427ap24_on() and s6e88a0_ams427ap24_off() > changed DSI commands to multi context and used "accum_err" returns. > - In functions s6e88a0_ams427ap24_on() and s6e88a0_ams427ap24_off() replaced > msleep() by mipi_dsi_msleep(). > - The function s6e88a0_ams427ap24_get_modes() was changed to make use of > drm_connector_helper_get_modes_fixed(). This also required to include > drm/drm_probe_helper.h. > - In function s6e88a0_ams427ap24_probe() registring the regulators was changed > to devm_regulator_bulk_get_const(). This required to change supplies in struct > s6e88a0_ams427ap24 to a pointer. > - Removed bool "prepared" from struct s6e88a0_ams427ap24 and instead used > framework-provided "panel->prepared" in functions s6e88a0_ams427ap24_prepare() > and s6e88a0_ams427ap24_unprepare(). > > [1] https://github.com/msm8916-mainline/linux-mdss-dsi-panel-driver-generator > [2] https://github.com/msm8916-mainline/linux-downstream/blob/GT-I9195I/drivers/video/msm/mdss/samsung/S6E88A0_AMS427AP24/dsi_panel_S6E88A0_AMS427AP24_qhd_octa_video.dtsi > > Signed-off-by: Jakob Hauser <jahau@rocketmail.com> > --- > Coulnd't read out RAW EDID, /sys/class/drm/card0-DSI-1/edid is empty. DSI panels doesn't have EDID, you can drop this comment > > Changes in v2: > - Removed bool "prepared" from struct s6e88a0_ams427ap24 and instead used > framework-provided "panel->prepared" in functions s6e88a0_ams427ap24_prepare() > and s6e88a0_ams427ap24_unprepare(). Mentioned this in the commit message. > --- > drivers/gpu/drm/panel/Kconfig | 9 + > drivers/gpu/drm/panel/Makefile | 1 + > .../panel/panel-samsung-s6e88a0-ams427ap24.c | 260 ++++++++++++++++++ > 3 files changed, 270 insertions(+) > create mode 100644 drivers/gpu/drm/panel/panel-samsung-s6e88a0-ams427ap24.c > > diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig > index bce4cb64184a..f8adc38447fb 100644 > --- a/drivers/gpu/drm/panel/Kconfig > +++ b/drivers/gpu/drm/panel/Kconfig > @@ -632,6 +632,15 @@ config DRM_PANEL_SAMSUNG_AMS639RQ08 > Say Y or M here if you want to enable support for the > Samsung AMS639RQ08 FHD Plus (2340x1080@60Hz) CMD mode panel. > > +config DRM_PANEL_SAMSUNG_S6E88A0_AMS427AP24 > + tristate "Samsung AMS427AP24 panel with S6E88A0 controller" > + depends on GPIOLIB && OF && REGULATOR > + depends on DRM_MIPI_DSI > + help > + Say Y here if you want to enable support for Samsung AMS427AP24 panel > + with S6E88A0 controller (found in Samsung Galaxy S4 Mini Value Edition > + GT-I9195I). To compile this driver as a module, choose M here. > + > config DRM_PANEL_SAMSUNG_S6E88A0_AMS452EF01 > tristate "Samsung AMS452EF01 panel with S6E88A0 DSI video mode controller" > depends on OF > diff --git a/drivers/gpu/drm/panel/Makefile b/drivers/gpu/drm/panel/Makefile > index 4db02c2411ae..7dcf72646cac 100644 > --- a/drivers/gpu/drm/panel/Makefile > +++ b/drivers/gpu/drm/panel/Makefile > @@ -77,6 +77,7 @@ obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6E63J0X03) += panel-samsung-s6e63j0x03.o > obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6E63M0) += panel-samsung-s6e63m0.o > obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6E63M0_SPI) += panel-samsung-s6e63m0-spi.o > obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6E63M0_DSI) += panel-samsung-s6e63m0-dsi.o > +obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6E88A0_AMS427AP24) += panel-samsung-s6e88a0-ams427ap24.o > obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6E88A0_AMS452EF01) += panel-samsung-s6e88a0-ams452ef01.o > obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6E8AA0) += panel-samsung-s6e8aa0.o > obj-$(CONFIG_DRM_PANEL_SAMSUNG_SOFEF00) += panel-samsung-sofef00.o > diff --git a/drivers/gpu/drm/panel/panel-samsung-s6e88a0-ams427ap24.c b/drivers/gpu/drm/panel/panel-samsung-s6e88a0-ams427ap24.c > new file mode 100644 > index 000000000000..0ab2768e0e2b > --- /dev/null > +++ b/drivers/gpu/drm/panel/panel-samsung-s6e88a0-ams427ap24.c > @@ -0,0 +1,260 @@ > +// SPDX-License-Identifier: GPL-2.0-only > +/* > + * Samsung AMS427AP24 panel with S6E88A0 controller > + * Copyright (c) 2024 Jakob Hauser <jahau@rocketmail.com> > + */ > + > +#include <linux/delay.h> > +#include <linux/gpio/consumer.h> > +#include <linux/module.h> > +#include <linux/of.h> > +#include <linux/regulator/consumer.h> > + > +#include <video/mipi_display.h> > + > +#include <drm/drm_mipi_dsi.h> > +#include <drm/drm_modes.h> > +#include <drm/drm_panel.h> > +#include <drm/drm_probe_helper.h> > + > +struct s6e88a0_ams427ap24 { > + struct drm_panel panel; > + struct mipi_dsi_device *dsi; > + struct regulator_bulk_data *supplies; > + struct gpio_desc *reset_gpio; > +}; > + > +const struct regulator_bulk_data s6e88a0_ams427ap24_supplies[] = { Please add static > + { .supply = "vdd3" }, > + { .supply = "vci" }, > +}; > + > +static inline > +struct s6e88a0_ams427ap24 *to_s6e88a0_ams427ap24(struct drm_panel *panel) > +{ > + return container_of(panel, struct s6e88a0_ams427ap24, panel); > +} > + > +static void s6e88a0_ams427ap24_reset(struct s6e88a0_ams427ap24 *ctx) > +{ > + gpiod_set_value_cansleep(ctx->reset_gpio, 0); > + usleep_range(5000, 6000); > + gpiod_set_value_cansleep(ctx->reset_gpio, 1); > + usleep_range(1000, 2000); > + gpiod_set_value_cansleep(ctx->reset_gpio, 0); > + usleep_range(18000, 19000); > +} > + > +static int s6e88a0_ams427ap24_on(struct s6e88a0_ams427ap24 *ctx) > +{ > + struct mipi_dsi_device *dsi = ctx->dsi; > + struct mipi_dsi_multi_context dsi_ctx = { .dsi = dsi }; > + > + dsi->mode_flags |= MIPI_DSI_MODE_LPM; > + > + mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xf0, 0x5a, 0x5a); > + mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xfc, 0x5a, 0x5a); > + mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xb0, 0x11); > + mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xfd, 0x11); > + mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xb0, 0x13); > + mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xfd, 0x18); > + mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xb0, 0x02); > + mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xb8, 0x30); > + > + mipi_dsi_dcs_exit_sleep_mode_multi(&dsi_ctx); > + mipi_dsi_msleep(&dsi_ctx, 20); > + > + mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xf1, 0x5a, 0x5a); > + mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xcc, 0x4c); > + mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xf2, 0x03, 0x0d); > + mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xf1, 0xa5, 0xa5); > + mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xca, > + 0x01, 0x00, 0x01, 0x00, 0x01, 0x00, 0x80, > + 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, > + 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, > + 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, > + 0x80, 0x80, 0x00, 0x00, 0x00); > + mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xb2, > + 0x40, 0x08, 0x20, 0x00, 0x08); > + mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xb6, 0x28, 0x0b); > + mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xf7, 0x03); > + mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0x55, 0x00); > + mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xf0, 0xa5, 0xa5); > + mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xfc, 0xa5, 0xa5); > + > + mipi_dsi_dcs_set_display_on_multi(&dsi_ctx); > + > + return dsi_ctx.accum_err; > +} > + > +static int s6e88a0_ams427ap24_off(struct s6e88a0_ams427ap24 *ctx) > +{ > + struct mipi_dsi_device *dsi = ctx->dsi; > + struct mipi_dsi_multi_context dsi_ctx = { .dsi = dsi }; > + > + dsi->mode_flags &= ~MIPI_DSI_MODE_LPM; > + > + mipi_dsi_dcs_set_display_off_multi(&dsi_ctx); > + mipi_dsi_dcs_enter_sleep_mode_multi(&dsi_ctx); > + mipi_dsi_msleep(&dsi_ctx, 120); > + > + return dsi_ctx.accum_err; > +} > + > +static int s6e88a0_ams427ap24_prepare(struct drm_panel *panel) > +{ > + struct s6e88a0_ams427ap24 *ctx = to_s6e88a0_ams427ap24(panel); > + struct device *dev = &ctx->dsi->dev; > + int ret; > + > + if (panel->prepared) > + return 0; You can drop these, _prepare won't be called twice, the framework controls that. > + > + ret = regulator_bulk_enable(ARRAY_SIZE(s6e88a0_ams427ap24_supplies), > + ctx->supplies); > + if (ret < 0) { > + dev_err(dev, "Failed to enable regulators: %d\n", ret); > + return ret; > + } > + > + s6e88a0_ams427ap24_reset(ctx); > + > + ret = s6e88a0_ams427ap24_on(ctx); > + if (ret < 0) { > + dev_err(dev, "Failed to initialize panel: %d\n", ret); > + gpiod_set_value_cansleep(ctx->reset_gpio, 1); > + regulator_bulk_disable(ARRAY_SIZE(s6e88a0_ams427ap24_supplies), > + ctx->supplies); > + return ret; > + } > + > + panel->prepared = true; Ditto > + return 0; > +} > + > +static int s6e88a0_ams427ap24_unprepare(struct drm_panel *panel) > +{ > + struct s6e88a0_ams427ap24 *ctx = to_s6e88a0_ams427ap24(panel); > + struct device *dev = &ctx->dsi->dev; > + int ret; > + > + if (!panel->prepared) > + return 0; Ditto > + > + ret = s6e88a0_ams427ap24_off(ctx); > + if (ret < 0) > + dev_err(dev, "Failed to un-initialize panel: %d\n", ret); > + > + gpiod_set_value_cansleep(ctx->reset_gpio, 1); > + regulator_bulk_disable(ARRAY_SIZE(s6e88a0_ams427ap24_supplies), > + ctx->supplies); > + > + panel->prepared = false; Ditto > + return 0; > +} > + > +static const struct drm_display_mode s6e88a0_ams427ap24_mode = { > + .clock = (540 + 94 + 4 + 18) * (960 + 12 + 1 + 3) * 60 / 1000, > + .hdisplay = 540, > + .hsync_start = 540 + 94, > + .hsync_end = 540 + 94 + 4, > + .htotal = 540 + 94 + 4 + 18, > + .vdisplay = 960, > + .vsync_start = 960 + 12, > + .vsync_end = 960 + 12 + 1, > + .vtotal = 960 + 12 + 1 + 3, > + .width_mm = 55, > + .height_mm = 95, > + .type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED, > +}; > + > +static int s6e88a0_ams427ap24_get_modes(struct drm_panel *panel, > + struct drm_connector *connector) > +{ > + return drm_connector_helper_get_modes_fixed(connector, > + &s6e88a0_ams427ap24_mode); > +} > + > +static const struct drm_panel_funcs s6e88a0_ams427ap24_panel_funcs = { > + .prepare = s6e88a0_ams427ap24_prepare, > + .unprepare = s6e88a0_ams427ap24_unprepare, > + .get_modes = s6e88a0_ams427ap24_get_modes, > +}; > + > +static int s6e88a0_ams427ap24_probe(struct mipi_dsi_device *dsi) > +{ > + struct device *dev = &dsi->dev; > + struct s6e88a0_ams427ap24 *ctx; > + int ret; > + > + ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL); > + if (!ctx) > + return -ENOMEM; > + > + ret = devm_regulator_bulk_get_const(dev, > + ARRAY_SIZE(s6e88a0_ams427ap24_supplies), > + s6e88a0_ams427ap24_supplies, > + &ctx->supplies); > + if (ret < 0) > + return ret; > + > + ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH); > + if (IS_ERR(ctx->reset_gpio)) > + return dev_err_probe(dev, PTR_ERR(ctx->reset_gpio), > + "Failed to get reset-gpios\n"); > + > + ctx->dsi = dsi; > + mipi_dsi_set_drvdata(dsi, ctx); > + > + dsi->lanes = 2; > + dsi->format = MIPI_DSI_FMT_RGB888; > + dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST | > + MIPI_DSI_MODE_NO_EOT_PACKET; > + > + drm_panel_init(&ctx->panel, dev, &s6e88a0_ams427ap24_panel_funcs, > + DRM_MODE_CONNECTOR_DSI); > + ctx->panel.prepare_prev_first = true; > + > + drm_panel_add(&ctx->panel); > + > + ret = mipi_dsi_attach(dsi); > + if (ret < 0) { > + dev_err(dev, "Failed to attach to DSI host: %d\n", ret); > + drm_panel_remove(&ctx->panel); > + return ret; > + } > + > + return 0; > +} > + > +static void s6e88a0_ams427ap24_remove(struct mipi_dsi_device *dsi) > +{ > + struct s6e88a0_ams427ap24 *ctx = mipi_dsi_get_drvdata(dsi); > + int ret; > + > + ret = mipi_dsi_detach(dsi); > + if (ret < 0) > + dev_err(&dsi->dev, "Failed to detach from DSI host: %d\n", ret); > + > + drm_panel_remove(&ctx->panel); > +} > + > +static const struct of_device_id s6e88a0_ams427ap24_of_match[] = { > + { .compatible = "samsung,s6e88a0-ams427ap24" }, > + { /* sentinel */ }, > +}; > +MODULE_DEVICE_TABLE(of, s6e88a0_ams427ap24_of_match); > + > +static struct mipi_dsi_driver s6e88a0_ams427ap24_driver = { > + .probe = s6e88a0_ams427ap24_probe, > + .remove = s6e88a0_ams427ap24_remove, > + .driver = { > + .name = "panel-s6e88a0-ams427ap24", > + .of_match_table = s6e88a0_ams427ap24_of_match, > + }, > +}; > +module_mipi_dsi_driver(s6e88a0_ams427ap24_driver); > + > +MODULE_AUTHOR("Jakob Hauser <jahau@rocketmail.com>"); > +MODULE_DESCRIPTION("Samsung AMS427AP24 panel with S6E88A0 controller"); > +MODULE_LICENSE("GPL v2"); Thanks, Neil
diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig index bce4cb64184a..f8adc38447fb 100644 --- a/drivers/gpu/drm/panel/Kconfig +++ b/drivers/gpu/drm/panel/Kconfig @@ -632,6 +632,15 @@ config DRM_PANEL_SAMSUNG_AMS639RQ08 Say Y or M here if you want to enable support for the Samsung AMS639RQ08 FHD Plus (2340x1080@60Hz) CMD mode panel. +config DRM_PANEL_SAMSUNG_S6E88A0_AMS427AP24 + tristate "Samsung AMS427AP24 panel with S6E88A0 controller" + depends on GPIOLIB && OF && REGULATOR + depends on DRM_MIPI_DSI + help + Say Y here if you want to enable support for Samsung AMS427AP24 panel + with S6E88A0 controller (found in Samsung Galaxy S4 Mini Value Edition + GT-I9195I). To compile this driver as a module, choose M here. + config DRM_PANEL_SAMSUNG_S6E88A0_AMS452EF01 tristate "Samsung AMS452EF01 panel with S6E88A0 DSI video mode controller" depends on OF diff --git a/drivers/gpu/drm/panel/Makefile b/drivers/gpu/drm/panel/Makefile index 4db02c2411ae..7dcf72646cac 100644 --- a/drivers/gpu/drm/panel/Makefile +++ b/drivers/gpu/drm/panel/Makefile @@ -77,6 +77,7 @@ obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6E63J0X03) += panel-samsung-s6e63j0x03.o obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6E63M0) += panel-samsung-s6e63m0.o obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6E63M0_SPI) += panel-samsung-s6e63m0-spi.o obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6E63M0_DSI) += panel-samsung-s6e63m0-dsi.o +obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6E88A0_AMS427AP24) += panel-samsung-s6e88a0-ams427ap24.o obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6E88A0_AMS452EF01) += panel-samsung-s6e88a0-ams452ef01.o obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6E8AA0) += panel-samsung-s6e8aa0.o obj-$(CONFIG_DRM_PANEL_SAMSUNG_SOFEF00) += panel-samsung-sofef00.o diff --git a/drivers/gpu/drm/panel/panel-samsung-s6e88a0-ams427ap24.c b/drivers/gpu/drm/panel/panel-samsung-s6e88a0-ams427ap24.c new file mode 100644 index 000000000000..0ab2768e0e2b --- /dev/null +++ b/drivers/gpu/drm/panel/panel-samsung-s6e88a0-ams427ap24.c @@ -0,0 +1,260 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Samsung AMS427AP24 panel with S6E88A0 controller + * Copyright (c) 2024 Jakob Hauser <jahau@rocketmail.com> + */ + +#include <linux/delay.h> +#include <linux/gpio/consumer.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/regulator/consumer.h> + +#include <video/mipi_display.h> + +#include <drm/drm_mipi_dsi.h> +#include <drm/drm_modes.h> +#include <drm/drm_panel.h> +#include <drm/drm_probe_helper.h> + +struct s6e88a0_ams427ap24 { + struct drm_panel panel; + struct mipi_dsi_device *dsi; + struct regulator_bulk_data *supplies; + struct gpio_desc *reset_gpio; +}; + +const struct regulator_bulk_data s6e88a0_ams427ap24_supplies[] = { + { .supply = "vdd3" }, + { .supply = "vci" }, +}; + +static inline +struct s6e88a0_ams427ap24 *to_s6e88a0_ams427ap24(struct drm_panel *panel) +{ + return container_of(panel, struct s6e88a0_ams427ap24, panel); +} + +static void s6e88a0_ams427ap24_reset(struct s6e88a0_ams427ap24 *ctx) +{ + gpiod_set_value_cansleep(ctx->reset_gpio, 0); + usleep_range(5000, 6000); + gpiod_set_value_cansleep(ctx->reset_gpio, 1); + usleep_range(1000, 2000); + gpiod_set_value_cansleep(ctx->reset_gpio, 0); + usleep_range(18000, 19000); +} + +static int s6e88a0_ams427ap24_on(struct s6e88a0_ams427ap24 *ctx) +{ + struct mipi_dsi_device *dsi = ctx->dsi; + struct mipi_dsi_multi_context dsi_ctx = { .dsi = dsi }; + + dsi->mode_flags |= MIPI_DSI_MODE_LPM; + + mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xf0, 0x5a, 0x5a); + mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xfc, 0x5a, 0x5a); + mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xb0, 0x11); + mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xfd, 0x11); + mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xb0, 0x13); + mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xfd, 0x18); + mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xb0, 0x02); + mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xb8, 0x30); + + mipi_dsi_dcs_exit_sleep_mode_multi(&dsi_ctx); + mipi_dsi_msleep(&dsi_ctx, 20); + + mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xf1, 0x5a, 0x5a); + mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xcc, 0x4c); + mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xf2, 0x03, 0x0d); + mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xf1, 0xa5, 0xa5); + mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xca, + 0x01, 0x00, 0x01, 0x00, 0x01, 0x00, 0x80, + 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, + 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, + 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, + 0x80, 0x80, 0x00, 0x00, 0x00); + mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xb2, + 0x40, 0x08, 0x20, 0x00, 0x08); + mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xb6, 0x28, 0x0b); + mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xf7, 0x03); + mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0x55, 0x00); + mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xf0, 0xa5, 0xa5); + mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xfc, 0xa5, 0xa5); + + mipi_dsi_dcs_set_display_on_multi(&dsi_ctx); + + return dsi_ctx.accum_err; +} + +static int s6e88a0_ams427ap24_off(struct s6e88a0_ams427ap24 *ctx) +{ + struct mipi_dsi_device *dsi = ctx->dsi; + struct mipi_dsi_multi_context dsi_ctx = { .dsi = dsi }; + + dsi->mode_flags &= ~MIPI_DSI_MODE_LPM; + + mipi_dsi_dcs_set_display_off_multi(&dsi_ctx); + mipi_dsi_dcs_enter_sleep_mode_multi(&dsi_ctx); + mipi_dsi_msleep(&dsi_ctx, 120); + + return dsi_ctx.accum_err; +} + +static int s6e88a0_ams427ap24_prepare(struct drm_panel *panel) +{ + struct s6e88a0_ams427ap24 *ctx = to_s6e88a0_ams427ap24(panel); + struct device *dev = &ctx->dsi->dev; + int ret; + + if (panel->prepared) + return 0; + + ret = regulator_bulk_enable(ARRAY_SIZE(s6e88a0_ams427ap24_supplies), + ctx->supplies); + if (ret < 0) { + dev_err(dev, "Failed to enable regulators: %d\n", ret); + return ret; + } + + s6e88a0_ams427ap24_reset(ctx); + + ret = s6e88a0_ams427ap24_on(ctx); + if (ret < 0) { + dev_err(dev, "Failed to initialize panel: %d\n", ret); + gpiod_set_value_cansleep(ctx->reset_gpio, 1); + regulator_bulk_disable(ARRAY_SIZE(s6e88a0_ams427ap24_supplies), + ctx->supplies); + return ret; + } + + panel->prepared = true; + return 0; +} + +static int s6e88a0_ams427ap24_unprepare(struct drm_panel *panel) +{ + struct s6e88a0_ams427ap24 *ctx = to_s6e88a0_ams427ap24(panel); + struct device *dev = &ctx->dsi->dev; + int ret; + + if (!panel->prepared) + return 0; + + ret = s6e88a0_ams427ap24_off(ctx); + if (ret < 0) + dev_err(dev, "Failed to un-initialize panel: %d\n", ret); + + gpiod_set_value_cansleep(ctx->reset_gpio, 1); + regulator_bulk_disable(ARRAY_SIZE(s6e88a0_ams427ap24_supplies), + ctx->supplies); + + panel->prepared = false; + return 0; +} + +static const struct drm_display_mode s6e88a0_ams427ap24_mode = { + .clock = (540 + 94 + 4 + 18) * (960 + 12 + 1 + 3) * 60 / 1000, + .hdisplay = 540, + .hsync_start = 540 + 94, + .hsync_end = 540 + 94 + 4, + .htotal = 540 + 94 + 4 + 18, + .vdisplay = 960, + .vsync_start = 960 + 12, + .vsync_end = 960 + 12 + 1, + .vtotal = 960 + 12 + 1 + 3, + .width_mm = 55, + .height_mm = 95, + .type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED, +}; + +static int s6e88a0_ams427ap24_get_modes(struct drm_panel *panel, + struct drm_connector *connector) +{ + return drm_connector_helper_get_modes_fixed(connector, + &s6e88a0_ams427ap24_mode); +} + +static const struct drm_panel_funcs s6e88a0_ams427ap24_panel_funcs = { + .prepare = s6e88a0_ams427ap24_prepare, + .unprepare = s6e88a0_ams427ap24_unprepare, + .get_modes = s6e88a0_ams427ap24_get_modes, +}; + +static int s6e88a0_ams427ap24_probe(struct mipi_dsi_device *dsi) +{ + struct device *dev = &dsi->dev; + struct s6e88a0_ams427ap24 *ctx; + int ret; + + ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL); + if (!ctx) + return -ENOMEM; + + ret = devm_regulator_bulk_get_const(dev, + ARRAY_SIZE(s6e88a0_ams427ap24_supplies), + s6e88a0_ams427ap24_supplies, + &ctx->supplies); + if (ret < 0) + return ret; + + ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH); + if (IS_ERR(ctx->reset_gpio)) + return dev_err_probe(dev, PTR_ERR(ctx->reset_gpio), + "Failed to get reset-gpios\n"); + + ctx->dsi = dsi; + mipi_dsi_set_drvdata(dsi, ctx); + + dsi->lanes = 2; + dsi->format = MIPI_DSI_FMT_RGB888; + dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST | + MIPI_DSI_MODE_NO_EOT_PACKET; + + drm_panel_init(&ctx->panel, dev, &s6e88a0_ams427ap24_panel_funcs, + DRM_MODE_CONNECTOR_DSI); + ctx->panel.prepare_prev_first = true; + + drm_panel_add(&ctx->panel); + + ret = mipi_dsi_attach(dsi); + if (ret < 0) { + dev_err(dev, "Failed to attach to DSI host: %d\n", ret); + drm_panel_remove(&ctx->panel); + return ret; + } + + return 0; +} + +static void s6e88a0_ams427ap24_remove(struct mipi_dsi_device *dsi) +{ + struct s6e88a0_ams427ap24 *ctx = mipi_dsi_get_drvdata(dsi); + int ret; + + ret = mipi_dsi_detach(dsi); + if (ret < 0) + dev_err(&dsi->dev, "Failed to detach from DSI host: %d\n", ret); + + drm_panel_remove(&ctx->panel); +} + +static const struct of_device_id s6e88a0_ams427ap24_of_match[] = { + { .compatible = "samsung,s6e88a0-ams427ap24" }, + { /* sentinel */ }, +}; +MODULE_DEVICE_TABLE(of, s6e88a0_ams427ap24_of_match); + +static struct mipi_dsi_driver s6e88a0_ams427ap24_driver = { + .probe = s6e88a0_ams427ap24_probe, + .remove = s6e88a0_ams427ap24_remove, + .driver = { + .name = "panel-s6e88a0-ams427ap24", + .of_match_table = s6e88a0_ams427ap24_of_match, + }, +}; +module_mipi_dsi_driver(s6e88a0_ams427ap24_driver); + +MODULE_AUTHOR("Jakob Hauser <jahau@rocketmail.com>"); +MODULE_DESCRIPTION("Samsung AMS427AP24 panel with S6E88A0 controller"); +MODULE_LICENSE("GPL v2");
This initial part of the panel driver was mostly generated by the "linux-mdss-dsi-panel-driver-generator" tool [1], reading downstream Android kernel file "dsi_panel_S6E88A0_AMS427AP24_qhd_octa_video.dtsi" [2]. On top of the generic output of the tool, there were a couple of changes applied: - Added mipi_dsi_dcs_set_display_on() to function s6e88a0_ams427ap24_on(), otherwise the display does not show up. - In functions s6e88a0_ams427ap24_on() and s6e88a0_ams427ap24_off() changed DSI commands to multi context and used "accum_err" returns. - In functions s6e88a0_ams427ap24_on() and s6e88a0_ams427ap24_off() replaced msleep() by mipi_dsi_msleep(). - The function s6e88a0_ams427ap24_get_modes() was changed to make use of drm_connector_helper_get_modes_fixed(). This also required to include drm/drm_probe_helper.h. - In function s6e88a0_ams427ap24_probe() registring the regulators was changed to devm_regulator_bulk_get_const(). This required to change supplies in struct s6e88a0_ams427ap24 to a pointer. - Removed bool "prepared" from struct s6e88a0_ams427ap24 and instead used framework-provided "panel->prepared" in functions s6e88a0_ams427ap24_prepare() and s6e88a0_ams427ap24_unprepare(). [1] https://github.com/msm8916-mainline/linux-mdss-dsi-panel-driver-generator [2] https://github.com/msm8916-mainline/linux-downstream/blob/GT-I9195I/drivers/video/msm/mdss/samsung/S6E88A0_AMS427AP24/dsi_panel_S6E88A0_AMS427AP24_qhd_octa_video.dtsi Signed-off-by: Jakob Hauser <jahau@rocketmail.com> --- Coulnd't read out RAW EDID, /sys/class/drm/card0-DSI-1/edid is empty. Changes in v2: - Removed bool "prepared" from struct s6e88a0_ams427ap24 and instead used framework-provided "panel->prepared" in functions s6e88a0_ams427ap24_prepare() and s6e88a0_ams427ap24_unprepare(). Mentioned this in the commit message. --- drivers/gpu/drm/panel/Kconfig | 9 + drivers/gpu/drm/panel/Makefile | 1 + .../panel/panel-samsung-s6e88a0-ams427ap24.c | 260 ++++++++++++++++++ 3 files changed, 270 insertions(+) create mode 100644 drivers/gpu/drm/panel/panel-samsung-s6e88a0-ams427ap24.c