| Message ID | 20241023124411.1153552-3-r.czerwinski@pengutronix.de (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | None | expand |
On Wed, Oct 23, 2024 at 02:44:10PM +0200, Rouven Czerwinski wrote: > The LXD M9189A panel is based on the EK79007AD3 DSI display controller. > It currently supports only 4 lane operation. > > Signed-off-by: Rouven Czerwinski <r.czerwinski@pengutronix.de> > --- > MAINTAINERS | 6 + > drivers/gpu/drm/panel/Kconfig | 9 + > drivers/gpu/drm/panel/Makefile | 1 + > drivers/gpu/drm/panel/panel-lxd-m9189a.c | 261 +++++++++++++++++++++++ > 4 files changed, 277 insertions(+) > create mode 100644 drivers/gpu/drm/panel/panel-lxd-m9189a.c > > diff --git a/MAINTAINERS b/MAINTAINERS > index e9659a5a7fb33..e4d749b403c28 100644 > --- a/MAINTAINERS > +++ b/MAINTAINERS > @@ -7179,6 +7179,12 @@ F: Documentation/devicetree/bindings/display/lvds.yaml > F: Documentation/devicetree/bindings/display/panel/panel-lvds.yaml > F: drivers/gpu/drm/panel/panel-lvds.c > > +DRM DRIVER FOR LXD M9189A PANELS > +M: Rouven Czerwinski <r.czerwinski@pengutronix.de> > +S: Maintained > +F: Documentation/devicetree/bindings/display/panel/lxd,m9189a.yaml > +F: drivers/gpu/drm/panel/panel-lxd-m9189a.c > + > DRM DRIVER FOR MANTIX MLAF057WE51 PANELS > M: Guido Günther <agx@sigxcpu.org> > R: Purism Kernel Team <kernel@puri.sm> > diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig > index d3a9a9fafe4ec..7667ac1ef80e3 100644 > --- a/drivers/gpu/drm/panel/Kconfig > +++ b/drivers/gpu/drm/panel/Kconfig > @@ -135,6 +135,15 @@ config DRM_PANEL_FEIYANG_FY07024DI26A30D > Say Y if you want to enable support for panels based on the > Feiyang FY07024DI26A30-D MIPI-DSI interface. > > +config DRM_PANEL_LXD_M9189A > + tristate "LXD M9189A MIPI-DSI LCD panel" > + depends on OF > + depends on DRM_MIPI_DSI > + depends on BACKLIGHT_CLASS_DEVICE > + help > + Say Y if you want to enable support for the LXD M9189A 4-Lane > + 1024x600 MIPI DSI panel. > + > config DRM_PANEL_DSI_CM > tristate "Generic DSI command mode panels" > depends on OF > diff --git a/drivers/gpu/drm/panel/Makefile b/drivers/gpu/drm/panel/Makefile > index 987a087024103..6d77c304e7529 100644 > --- a/drivers/gpu/drm/panel/Makefile > +++ b/drivers/gpu/drm/panel/Makefile > @@ -16,6 +16,7 @@ obj-$(CONFIG_DRM_PANEL_EBBG_FT8719) += panel-ebbg-ft8719.o > obj-$(CONFIG_DRM_PANEL_ELIDA_KD35T133) += panel-elida-kd35t133.o > obj-$(CONFIG_DRM_PANEL_FEIXIN_K101_IM2BA02) += panel-feixin-k101-im2ba02.o > obj-$(CONFIG_DRM_PANEL_FEIYANG_FY07024DI26A30D) += panel-feiyang-fy07024di26a30d.o > +obj-$(CONFIG_DRM_PANEL_LXD_M9189A) += panel-lxd-m9189a.o > obj-$(CONFIG_DRM_PANEL_HIMAX_HX83102) += panel-himax-hx83102.o > obj-$(CONFIG_DRM_PANEL_HIMAX_HX83112A) += panel-himax-hx83112a.o > obj-$(CONFIG_DRM_PANEL_HIMAX_HX8394) += panel-himax-hx8394.o > diff --git a/drivers/gpu/drm/panel/panel-lxd-m9189a.c b/drivers/gpu/drm/panel/panel-lxd-m9189a.c > new file mode 100644 > index 0000000000000..71c5a18541bae > --- /dev/null > +++ b/drivers/gpu/drm/panel/panel-lxd-m9189a.c > @@ -0,0 +1,261 @@ > +// SPDX-License-Identifier: GPL-2.0-only > +/* > + * Generated with linux-mdss-dsi-panel-driver-generator from vendor device tree. > + * Copyright (c) 2024 Luca Weiss <luca.weiss@fairphone.com> > + */ > + > +#include <linux/delay.h> > +#include <linux/gpio/consumer.h> > +#include <linux/module.h> > +#include <linux/of.h> > +#include <linux/regulator/consumer.h> > + > +#include <drm/drm_mipi_dsi.h> > +#include <drm/drm_modes.h> > +#include <drm/drm_panel.h> > +#include <drm/drm_probe_helper.h> > + > +/* Manufacturer specific DSI commands */ > +#define EK79007AD3_GAMMA1 0x80 > +#define EK79007AD3_GAMMA2 0x81 > +#define EK79007AD3_GAMMA3 0x82 > +#define EK79007AD3_GAMMA4 0x83 > +#define EK79007AD3_GAMMA5 0x84 > +#define EK79007AD3_GAMMA6 0x85 > +#define EK79007AD3_GAMMA7 0x86 > +#define EK79007AD3_PANEL_CTRL3 0xB2 > + > +struct ek79007ad3_panel { > + struct drm_panel panel; > + struct mipi_dsi_device *dsi; > + struct regulator *supply; > + struct gpio_desc *reset_gpio; > + struct gpio_desc *standby_gpio; > +}; > + > +static inline struct ek79007ad3_panel *to_ek79007ad3_panel(struct drm_panel *panel) > +{ > + return container_of(panel, struct ek79007ad3_panel, panel); > +} > + > +static void ek79007ad3_reset(struct ek79007ad3_panel *ctx) > +{ > + gpiod_set_value_cansleep(ctx->reset_gpio, 0); > + msleep(20); > + gpiod_set_value_cansleep(ctx->reset_gpio, 1); > + msleep(30); > + gpiod_set_value_cansleep(ctx->reset_gpio, 0); > + msleep(55); > +} > + > +static int ek79007ad3_on(struct ek79007ad3_panel *ctx) > +{ > + struct mipi_dsi_device *dsi = ctx->dsi; > + struct device *dev = &dsi->dev; > + int ret; > + > + dsi->mode_flags |= MIPI_DSI_MODE_LPM; > + > + /* Gamma 2.2 */ > + mipi_dsi_dcs_write_seq(dsi, EK79007AD3_GAMMA1, 0x48); > + mipi_dsi_dcs_write_seq(dsi, EK79007AD3_GAMMA2, 0xB8); > + mipi_dsi_dcs_write_seq(dsi, EK79007AD3_GAMMA3, 0x88); > + mipi_dsi_dcs_write_seq(dsi, EK79007AD3_GAMMA4, 0x88); > + mipi_dsi_dcs_write_seq(dsi, EK79007AD3_GAMMA5, 0x58); > + mipi_dsi_dcs_write_seq(dsi, EK79007AD3_GAMMA6, 0xD2); > + mipi_dsi_dcs_write_seq(dsi, EK79007AD3_GAMMA7, 0x88); mipi_dsi_dcs_write_seq_multi > + msleep(50); mipi_dsi_msleep(), here and further below > + > + /* 4 Lanes */ > + ret = mipi_dsi_generic_write(dsi, (u8[]){ EK79007AD3_PANEL_CTRL3, 0x70 }, 2); mipi_dsi_generic_write_multi > + if (ret) > + goto fail; > + > + ret = mipi_dsi_dcs_exit_sleep_mode(dsi); _multi > + if (ret < 0) { > + dev_err(dev, "Failed to exit sleep mode: %d\n", ret); > + return ret; > + } > + msleep(120); > + > + ret = mipi_dsi_dcs_set_display_on(dsi); _multi > + msleep(120); > + > +fail: > + return ret; > +} > + > +static int ek79007ad3_disable(struct drm_panel *panel) > +{ > + struct ek79007ad3_panel *ctx = to_ek79007ad3_panel(panel); > + struct mipi_dsi_device *dsi = ctx->dsi; > + struct device *dev = &dsi->dev; > + int ret; > + > + dsi->mode_flags &= ~MIPI_DSI_MODE_LPM; > + > + ret = mipi_dsi_dcs_enter_sleep_mode(dsi); _multi > + if (ret < 0) { > + dev_err(dev, "Failed to enter sleep mode: %d\n", ret); > + return ret; > + } > + msleep(120); > + > + gpiod_set_value_cansleep(ctx->standby_gpio, 1); > + > + return 0; > +} > + > +static int ek79007ad3_prepare(struct drm_panel *panel) > +{ > + struct ek79007ad3_panel *ctx = to_ek79007ad3_panel(panel); > + struct mipi_dsi_device *dsi = ctx->dsi; > + struct device *dev = &ctx->dsi->dev; > + int ret; > + > + ret = regulator_enable(ctx->supply); > + if (ret < 0) { > + dev_err(dev, "Failed to enable regulators: %d\n", ret); > + return ret; > + } > + > + gpiod_set_value_cansleep(ctx->standby_gpio, 0); > + msleep(20); > + > + mipi_dsi_dcs_nop(dsi); PLease move these calls to _on() and use mipi_dsi_dcs_nop_multi() and mipi_dsi_usleep_range(). > + usleep_range(1000, 2000); > + > + ek79007ad3_reset(ctx); > + > + ret = ek79007ad3_on(ctx); > + if (ret < 0) { > + dev_err(dev, "Failed to initialize panel: %d\n", ret); > + gpiod_set_value_cansleep(ctx->reset_gpio, 1); > + regulator_disable(ctx->supply); > + return ret; > + } > + > + return 0; > +} > + > +static int ek79007ad3_unprepare(struct drm_panel *panel) > +{ > + struct ek79007ad3_panel *ctx = to_ek79007ad3_panel(panel); > + > + gpiod_set_value_cansleep(ctx->standby_gpio, 1); > + msleep(50); > + > + gpiod_set_value_cansleep(ctx->reset_gpio, 1); > + regulator_disable(ctx->supply); > + > + return 0; > +} > + > +static const struct drm_display_mode ek79007ad3_mode = { > + .clock = 51200, .clock = (1024 + 160 + 160 + 10) * (600 + 23 + 12 + 1) * N / 1000; > + .hdisplay = 1024, > + .hsync_start = 1024 + 160, > + .hsync_end = 1024 + 160 + 160, > + .htotal = 1024 + 160 + 160 + 10, > + .vdisplay = 600, > + .vsync_start = 600 + 12, > + .vsync_end = 600 + 12 + 23, > + .vtotal = 600 + 23 + 12 + 1, > + .width_mm = 154, > + .height_mm = 86, > +}; > + > +static int ek79007ad3_get_modes(struct drm_panel *panel, > + struct drm_connector *connector) > +{ > + return drm_connector_helper_get_modes_fixed(connector, &ek79007ad3_mode); > +} > + > +static const struct drm_panel_funcs ek79007ad3_panel_funcs = { > + .prepare = ek79007ad3_prepare, > + .unprepare = ek79007ad3_unprepare, > + .disable = ek79007ad3_disable, > + .get_modes = ek79007ad3_get_modes, > +}; > + > +static int ek79007ad3_probe(struct mipi_dsi_device *dsi) > +{ > + struct device *dev = &dsi->dev; > + struct ek79007ad3_panel *ctx; > + int ret; > + > + ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL); > + if (!ctx) > + return -ENOMEM; > + > + ctx->supply = devm_regulator_get(dev, "vdd"); > + if (IS_ERR(ctx->supply)) > + return dev_err_probe(dev, ret, "Failed to get regulator\n"); > + > + ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW); > + if (IS_ERR(ctx->reset_gpio)) > + return dev_err_probe(dev, PTR_ERR(ctx->reset_gpio), > + "Failed to get reset-gpios\n"); > + > + ctx->standby_gpio = devm_gpiod_get(dev, "standby", GPIOD_OUT_LOW); > + if (IS_ERR(ctx->standby_gpio)) > + return dev_err_probe(dev, PTR_ERR(ctx->standby_gpio), > + "Failed to get standby-gpios\n"); > + > + ctx->dsi = dsi; > + mipi_dsi_set_drvdata(dsi, ctx); > + > + dsi->lanes = 4; > + dsi->format = MIPI_DSI_FMT_RGB888; > + dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST; > + > + drm_panel_init(&ctx->panel, dev, &ek79007ad3_panel_funcs, > + DRM_MODE_CONNECTOR_DSI); > + ctx->panel.prepare_prev_first = true; > + > + ret = drm_panel_of_backlight(&ctx->panel); > + if (ret) > + return dev_err_probe(dev, ret, "Failed to get backlight\n"); > + > + drm_panel_add(&ctx->panel); > + > + ret = mipi_dsi_attach(dsi); > + if (ret < 0) { > + dev_err_probe(dev, ret, "Failed to attach to DSI host\n"); > + drm_panel_remove(&ctx->panel); > + return ret; > + } > + > + return 0; > +} > + > +static void ek79007ad3_remove(struct mipi_dsi_device *dsi) > +{ > + struct ek79007ad3_panel *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 ek79007ad3_of_match[] = { > + { .compatible = "lxd,m9189a" }, > + { /* sentinel */ } > +}; > +MODULE_DEVICE_TABLE(of, ek79007ad3_of_match); > + > +static struct mipi_dsi_driver ek79007ad3_driver = { > + .probe = ek79007ad3_probe, > + .remove = ek79007ad3_remove, > + .driver = { > + .name = "panel-fitipower-ek79007ad3", > + .of_match_table = ek79007ad3_of_match, > + }, > +}; > +module_mipi_dsi_driver(ek79007ad3_driver); > + > +MODULE_DESCRIPTION("DRM driver for ek79007ad3-equipped DSI panels"); > +MODULE_LICENSE("GPL"); > -- > 2.39.5 >
Hi Rouven,
kernel test robot noticed the following build warnings:
url: https://github.com/intel-lab-lkp/linux/commits/Rouven-Czerwinski/dt-bindings-display-panel-add-YAML-schema-for-LXD-M9189A/20241023-204826
base: c2ee9f594da826bea183ed14f2cc029c719bf4da
patch link: https://lore.kernel.org/r/20241023124411.1153552-3-r.czerwinski%40pengutronix.de
patch subject: [PATCH 3/3] drm/panel: add Fitipower EK79007AD3 panel driver
config: nios2-randconfig-r072-20241025 (https://download.01.org/0day-ci/archive/20241025/202410252201.QglvauIC-lkp@intel.com/config)
compiler: nios2-linux-gcc (GCC) 14.1.0
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Reported-by: Dan Carpenter <dan.carpenter@linaro.org>
| Closes: https://lore.kernel.org/r/202410252201.QglvauIC-lkp@intel.com/
smatch warnings:
drivers/gpu/drm/panel/panel-lxd-m9189a.c:193 ek79007ad3_probe() error: uninitialized symbol 'ret'.
vim +/ret +193 drivers/gpu/drm/panel/panel-lxd-m9189a.c
a69b961abc36b3 Rouven Czerwinski 2024-10-23 181 static int ek79007ad3_probe(struct mipi_dsi_device *dsi)
a69b961abc36b3 Rouven Czerwinski 2024-10-23 182 {
a69b961abc36b3 Rouven Czerwinski 2024-10-23 183 struct device *dev = &dsi->dev;
a69b961abc36b3 Rouven Czerwinski 2024-10-23 184 struct ek79007ad3_panel *ctx;
a69b961abc36b3 Rouven Czerwinski 2024-10-23 185 int ret;
a69b961abc36b3 Rouven Czerwinski 2024-10-23 186
a69b961abc36b3 Rouven Czerwinski 2024-10-23 187 ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
a69b961abc36b3 Rouven Czerwinski 2024-10-23 188 if (!ctx)
a69b961abc36b3 Rouven Czerwinski 2024-10-23 189 return -ENOMEM;
a69b961abc36b3 Rouven Czerwinski 2024-10-23 190
a69b961abc36b3 Rouven Czerwinski 2024-10-23 191 ctx->supply = devm_regulator_get(dev, "vdd");
a69b961abc36b3 Rouven Czerwinski 2024-10-23 192 if (IS_ERR(ctx->supply))
a69b961abc36b3 Rouven Czerwinski 2024-10-23 @193 return dev_err_probe(dev, ret, "Failed to get regulator\n");
s/ret/PTR_ERR(ctx->supply)/
a69b961abc36b3 Rouven Czerwinski 2024-10-23 194
a69b961abc36b3 Rouven Czerwinski 2024-10-23 195 ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
a69b961abc36b3 Rouven Czerwinski 2024-10-23 196 if (IS_ERR(ctx->reset_gpio))
a69b961abc36b3 Rouven Czerwinski 2024-10-23 197 return dev_err_probe(dev, PTR_ERR(ctx->reset_gpio),
a69b961abc36b3 Rouven Czerwinski 2024-10-23 198 "Failed to get reset-gpios\n");
a69b961abc36b3 Rouven Czerwinski 2024-10-23 199
a69b961abc36b3 Rouven Czerwinski 2024-10-23 200 ctx->standby_gpio = devm_gpiod_get(dev, "standby", GPIOD_OUT_LOW);
a69b961abc36b3 Rouven Czerwinski 2024-10-23 201 if (IS_ERR(ctx->standby_gpio))
diff --git a/MAINTAINERS b/MAINTAINERS index e9659a5a7fb33..e4d749b403c28 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -7179,6 +7179,12 @@ F: Documentation/devicetree/bindings/display/lvds.yaml F: Documentation/devicetree/bindings/display/panel/panel-lvds.yaml F: drivers/gpu/drm/panel/panel-lvds.c +DRM DRIVER FOR LXD M9189A PANELS +M: Rouven Czerwinski <r.czerwinski@pengutronix.de> +S: Maintained +F: Documentation/devicetree/bindings/display/panel/lxd,m9189a.yaml +F: drivers/gpu/drm/panel/panel-lxd-m9189a.c + DRM DRIVER FOR MANTIX MLAF057WE51 PANELS M: Guido Günther <agx@sigxcpu.org> R: Purism Kernel Team <kernel@puri.sm> diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig index d3a9a9fafe4ec..7667ac1ef80e3 100644 --- a/drivers/gpu/drm/panel/Kconfig +++ b/drivers/gpu/drm/panel/Kconfig @@ -135,6 +135,15 @@ config DRM_PANEL_FEIYANG_FY07024DI26A30D Say Y if you want to enable support for panels based on the Feiyang FY07024DI26A30-D MIPI-DSI interface. +config DRM_PANEL_LXD_M9189A + tristate "LXD M9189A MIPI-DSI LCD panel" + depends on OF + depends on DRM_MIPI_DSI + depends on BACKLIGHT_CLASS_DEVICE + help + Say Y if you want to enable support for the LXD M9189A 4-Lane + 1024x600 MIPI DSI panel. + config DRM_PANEL_DSI_CM tristate "Generic DSI command mode panels" depends on OF diff --git a/drivers/gpu/drm/panel/Makefile b/drivers/gpu/drm/panel/Makefile index 987a087024103..6d77c304e7529 100644 --- a/drivers/gpu/drm/panel/Makefile +++ b/drivers/gpu/drm/panel/Makefile @@ -16,6 +16,7 @@ obj-$(CONFIG_DRM_PANEL_EBBG_FT8719) += panel-ebbg-ft8719.o obj-$(CONFIG_DRM_PANEL_ELIDA_KD35T133) += panel-elida-kd35t133.o obj-$(CONFIG_DRM_PANEL_FEIXIN_K101_IM2BA02) += panel-feixin-k101-im2ba02.o obj-$(CONFIG_DRM_PANEL_FEIYANG_FY07024DI26A30D) += panel-feiyang-fy07024di26a30d.o +obj-$(CONFIG_DRM_PANEL_LXD_M9189A) += panel-lxd-m9189a.o obj-$(CONFIG_DRM_PANEL_HIMAX_HX83102) += panel-himax-hx83102.o obj-$(CONFIG_DRM_PANEL_HIMAX_HX83112A) += panel-himax-hx83112a.o obj-$(CONFIG_DRM_PANEL_HIMAX_HX8394) += panel-himax-hx8394.o diff --git a/drivers/gpu/drm/panel/panel-lxd-m9189a.c b/drivers/gpu/drm/panel/panel-lxd-m9189a.c new file mode 100644 index 0000000000000..71c5a18541bae --- /dev/null +++ b/drivers/gpu/drm/panel/panel-lxd-m9189a.c @@ -0,0 +1,261 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Generated with linux-mdss-dsi-panel-driver-generator from vendor device tree. + * Copyright (c) 2024 Luca Weiss <luca.weiss@fairphone.com> + */ + +#include <linux/delay.h> +#include <linux/gpio/consumer.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/regulator/consumer.h> + +#include <drm/drm_mipi_dsi.h> +#include <drm/drm_modes.h> +#include <drm/drm_panel.h> +#include <drm/drm_probe_helper.h> + +/* Manufacturer specific DSI commands */ +#define EK79007AD3_GAMMA1 0x80 +#define EK79007AD3_GAMMA2 0x81 +#define EK79007AD3_GAMMA3 0x82 +#define EK79007AD3_GAMMA4 0x83 +#define EK79007AD3_GAMMA5 0x84 +#define EK79007AD3_GAMMA6 0x85 +#define EK79007AD3_GAMMA7 0x86 +#define EK79007AD3_PANEL_CTRL3 0xB2 + +struct ek79007ad3_panel { + struct drm_panel panel; + struct mipi_dsi_device *dsi; + struct regulator *supply; + struct gpio_desc *reset_gpio; + struct gpio_desc *standby_gpio; +}; + +static inline struct ek79007ad3_panel *to_ek79007ad3_panel(struct drm_panel *panel) +{ + return container_of(panel, struct ek79007ad3_panel, panel); +} + +static void ek79007ad3_reset(struct ek79007ad3_panel *ctx) +{ + gpiod_set_value_cansleep(ctx->reset_gpio, 0); + msleep(20); + gpiod_set_value_cansleep(ctx->reset_gpio, 1); + msleep(30); + gpiod_set_value_cansleep(ctx->reset_gpio, 0); + msleep(55); +} + +static int ek79007ad3_on(struct ek79007ad3_panel *ctx) +{ + struct mipi_dsi_device *dsi = ctx->dsi; + struct device *dev = &dsi->dev; + int ret; + + dsi->mode_flags |= MIPI_DSI_MODE_LPM; + + /* Gamma 2.2 */ + mipi_dsi_dcs_write_seq(dsi, EK79007AD3_GAMMA1, 0x48); + mipi_dsi_dcs_write_seq(dsi, EK79007AD3_GAMMA2, 0xB8); + mipi_dsi_dcs_write_seq(dsi, EK79007AD3_GAMMA3, 0x88); + mipi_dsi_dcs_write_seq(dsi, EK79007AD3_GAMMA4, 0x88); + mipi_dsi_dcs_write_seq(dsi, EK79007AD3_GAMMA5, 0x58); + mipi_dsi_dcs_write_seq(dsi, EK79007AD3_GAMMA6, 0xD2); + mipi_dsi_dcs_write_seq(dsi, EK79007AD3_GAMMA7, 0x88); + msleep(50); + + /* 4 Lanes */ + ret = mipi_dsi_generic_write(dsi, (u8[]){ EK79007AD3_PANEL_CTRL3, 0x70 }, 2); + if (ret) + goto fail; + + ret = mipi_dsi_dcs_exit_sleep_mode(dsi); + if (ret < 0) { + dev_err(dev, "Failed to exit sleep mode: %d\n", ret); + return ret; + } + msleep(120); + + ret = mipi_dsi_dcs_set_display_on(dsi); + msleep(120); + +fail: + return ret; +} + +static int ek79007ad3_disable(struct drm_panel *panel) +{ + struct ek79007ad3_panel *ctx = to_ek79007ad3_panel(panel); + struct mipi_dsi_device *dsi = ctx->dsi; + struct device *dev = &dsi->dev; + int ret; + + dsi->mode_flags &= ~MIPI_DSI_MODE_LPM; + + ret = mipi_dsi_dcs_enter_sleep_mode(dsi); + if (ret < 0) { + dev_err(dev, "Failed to enter sleep mode: %d\n", ret); + return ret; + } + msleep(120); + + gpiod_set_value_cansleep(ctx->standby_gpio, 1); + + return 0; +} + +static int ek79007ad3_prepare(struct drm_panel *panel) +{ + struct ek79007ad3_panel *ctx = to_ek79007ad3_panel(panel); + struct mipi_dsi_device *dsi = ctx->dsi; + struct device *dev = &ctx->dsi->dev; + int ret; + + ret = regulator_enable(ctx->supply); + if (ret < 0) { + dev_err(dev, "Failed to enable regulators: %d\n", ret); + return ret; + } + + gpiod_set_value_cansleep(ctx->standby_gpio, 0); + msleep(20); + + mipi_dsi_dcs_nop(dsi); + usleep_range(1000, 2000); + + ek79007ad3_reset(ctx); + + ret = ek79007ad3_on(ctx); + if (ret < 0) { + dev_err(dev, "Failed to initialize panel: %d\n", ret); + gpiod_set_value_cansleep(ctx->reset_gpio, 1); + regulator_disable(ctx->supply); + return ret; + } + + return 0; +} + +static int ek79007ad3_unprepare(struct drm_panel *panel) +{ + struct ek79007ad3_panel *ctx = to_ek79007ad3_panel(panel); + + gpiod_set_value_cansleep(ctx->standby_gpio, 1); + msleep(50); + + gpiod_set_value_cansleep(ctx->reset_gpio, 1); + regulator_disable(ctx->supply); + + return 0; +} + +static const struct drm_display_mode ek79007ad3_mode = { + .clock = 51200, + .hdisplay = 1024, + .hsync_start = 1024 + 160, + .hsync_end = 1024 + 160 + 160, + .htotal = 1024 + 160 + 160 + 10, + .vdisplay = 600, + .vsync_start = 600 + 12, + .vsync_end = 600 + 12 + 23, + .vtotal = 600 + 23 + 12 + 1, + .width_mm = 154, + .height_mm = 86, +}; + +static int ek79007ad3_get_modes(struct drm_panel *panel, + struct drm_connector *connector) +{ + return drm_connector_helper_get_modes_fixed(connector, &ek79007ad3_mode); +} + +static const struct drm_panel_funcs ek79007ad3_panel_funcs = { + .prepare = ek79007ad3_prepare, + .unprepare = ek79007ad3_unprepare, + .disable = ek79007ad3_disable, + .get_modes = ek79007ad3_get_modes, +}; + +static int ek79007ad3_probe(struct mipi_dsi_device *dsi) +{ + struct device *dev = &dsi->dev; + struct ek79007ad3_panel *ctx; + int ret; + + ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL); + if (!ctx) + return -ENOMEM; + + ctx->supply = devm_regulator_get(dev, "vdd"); + if (IS_ERR(ctx->supply)) + return dev_err_probe(dev, ret, "Failed to get regulator\n"); + + ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW); + if (IS_ERR(ctx->reset_gpio)) + return dev_err_probe(dev, PTR_ERR(ctx->reset_gpio), + "Failed to get reset-gpios\n"); + + ctx->standby_gpio = devm_gpiod_get(dev, "standby", GPIOD_OUT_LOW); + if (IS_ERR(ctx->standby_gpio)) + return dev_err_probe(dev, PTR_ERR(ctx->standby_gpio), + "Failed to get standby-gpios\n"); + + ctx->dsi = dsi; + mipi_dsi_set_drvdata(dsi, ctx); + + dsi->lanes = 4; + dsi->format = MIPI_DSI_FMT_RGB888; + dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST; + + drm_panel_init(&ctx->panel, dev, &ek79007ad3_panel_funcs, + DRM_MODE_CONNECTOR_DSI); + ctx->panel.prepare_prev_first = true; + + ret = drm_panel_of_backlight(&ctx->panel); + if (ret) + return dev_err_probe(dev, ret, "Failed to get backlight\n"); + + drm_panel_add(&ctx->panel); + + ret = mipi_dsi_attach(dsi); + if (ret < 0) { + dev_err_probe(dev, ret, "Failed to attach to DSI host\n"); + drm_panel_remove(&ctx->panel); + return ret; + } + + return 0; +} + +static void ek79007ad3_remove(struct mipi_dsi_device *dsi) +{ + struct ek79007ad3_panel *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 ek79007ad3_of_match[] = { + { .compatible = "lxd,m9189a" }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, ek79007ad3_of_match); + +static struct mipi_dsi_driver ek79007ad3_driver = { + .probe = ek79007ad3_probe, + .remove = ek79007ad3_remove, + .driver = { + .name = "panel-fitipower-ek79007ad3", + .of_match_table = ek79007ad3_of_match, + }, +}; +module_mipi_dsi_driver(ek79007ad3_driver); + +MODULE_DESCRIPTION("DRM driver for ek79007ad3-equipped DSI panels"); +MODULE_LICENSE("GPL");
The LXD M9189A panel is based on the EK79007AD3 DSI display controller. It currently supports only 4 lane operation. Signed-off-by: Rouven Czerwinski <r.czerwinski@pengutronix.de> --- MAINTAINERS | 6 + drivers/gpu/drm/panel/Kconfig | 9 + drivers/gpu/drm/panel/Makefile | 1 + drivers/gpu/drm/panel/panel-lxd-m9189a.c | 261 +++++++++++++++++++++++ 4 files changed, 277 insertions(+) create mode 100644 drivers/gpu/drm/panel/panel-lxd-m9189a.c