| Message ID | 20240402-lg-sw43408-panel-v3-4-144f17a11a56@linaro.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | drm/panel: add support for LG SW43408 panel | expand |
On 2024-04-02 02:51:15, Dmitry Baryshkov wrote: > From: Sumit Semwal <sumit.semwal@linaro.org> > > LG SW43408 is 1080x2160, 4-lane MIPI-DSI panel, used in some Pixel3 > phones. @60Hz? > > Signed-off-by: Sumit Semwal <sumit.semwal@linaro.org> > [vinod: Add DSC support] > Signed-off-by: Vinod Koul <vkoul@kernel.org> > [caleb: cleanup and support turning off the panel] > Signed-off-by: Caleb Connolly <caleb@connolly.tech> > [DB: partially rewrote the driver and fixed DSC programming] > Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> Some small nits but I think this deserves a: Reviewed-by: Marijn Suijten <marijn.suijten@somainline.org> > --- > MAINTAINERS | 8 + > drivers/gpu/drm/panel/Kconfig | 11 ++ > drivers/gpu/drm/panel/Makefile | 1 + > drivers/gpu/drm/panel/panel-lg-sw43408.c | 326 +++++++++++++++++++++++++++++++ > 4 files changed, 346 insertions(+) > > diff --git a/MAINTAINERS b/MAINTAINERS > index d36c19c1bf81..4cc43c16e07e 100644 > --- a/MAINTAINERS > +++ b/MAINTAINERS > @@ -6789,6 +6789,14 @@ S: Maintained > F: Documentation/devicetree/bindings/display/panel/jadard,jd9365da-h3.yaml > F: drivers/gpu/drm/panel/panel-jadard-jd9365da-h3.c > > +DRM DRIVER FOR LG SW43408 PANELS > +M: Sumit Semwal <sumit.semwal@linaro.org> > +M: Caleb Connolly <caleb.connolly@linaro.org> > +S: Maintained > +T: git git://anongit.freedesktop.org/drm/drm-misc > +F: Documentation/devicetree/bindings/display/panel/lg,sw43408.yaml > +F: drivers/gpu/drm/panel/panel-lg-sw43408.c > + > DRM DRIVER FOR LOGICVC DISPLAY CONTROLLER > M: Paul Kocialkowski <paul.kocialkowski@bootlin.com> > S: Supported > diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig > index 6dc451f58a3e..a55e9437c8cf 100644 > --- a/drivers/gpu/drm/panel/Kconfig > +++ b/drivers/gpu/drm/panel/Kconfig > @@ -335,6 +335,17 @@ config DRM_PANEL_LG_LG4573 > Say Y here if you want to enable support for LG4573 RGB panel. > To compile this driver as a module, choose M here. > > +config DRM_PANEL_LG_SW43408 > + tristate "LG SW43408 panel" > + depends on OF > + depends on DRM_MIPI_DSI > + depends on BACKLIGHT_CLASS_DEVICE > + help > + Say Y here if you want to enable support for LG sw43408 panel. > + The panel has a 1080x2160 resolution and uses > + 24 bit RGB per pixel. It provides a MIPI DSI interface to > + the host and has a built-in LED backlight. > + > config DRM_PANEL_MAGNACHIP_D53E6EA8966 > tristate "Magnachip D53E6EA8966 DSI panel" > depends on OF && SPI > diff --git a/drivers/gpu/drm/panel/Makefile b/drivers/gpu/drm/panel/Makefile > index 24a02655d726..0b40b010e8e7 100644 > --- a/drivers/gpu/drm/panel/Makefile > +++ b/drivers/gpu/drm/panel/Makefile > @@ -34,6 +34,7 @@ obj-$(CONFIG_DRM_PANEL_LEADTEK_LTK050H3146W) += panel-leadtek-ltk050h3146w.o > obj-$(CONFIG_DRM_PANEL_LEADTEK_LTK500HD1829) += panel-leadtek-ltk500hd1829.o > obj-$(CONFIG_DRM_PANEL_LG_LB035Q02) += panel-lg-lb035q02.o > obj-$(CONFIG_DRM_PANEL_LG_LG4573) += panel-lg-lg4573.o > +obj-$(CONFIG_DRM_PANEL_LG_SW43408) += panel-lg-sw43408.o > obj-$(CONFIG_DRM_PANEL_MAGNACHIP_D53E6EA8966) += panel-magnachip-d53e6ea8966.o > obj-$(CONFIG_DRM_PANEL_NEC_NL8048HL11) += panel-nec-nl8048hl11.o > obj-$(CONFIG_DRM_PANEL_NEWVISION_NV3051D) += panel-newvision-nv3051d.o > diff --git a/drivers/gpu/drm/panel/panel-lg-sw43408.c b/drivers/gpu/drm/panel/panel-lg-sw43408.c > new file mode 100644 > index 000000000000..c7611bfa796b > --- /dev/null > +++ b/drivers/gpu/drm/panel/panel-lg-sw43408.c > @@ -0,0 +1,326 @@ > +// SPDX-License-Identifier: GPL-2.0+ > +/* > + * Copyright (C) 2019-2024 Linaro Ltd > + * Author: Sumit Semwal <sumit.semwal@linaro.org> > + * Dmitry Baryshkov <dmitry.baryshkov@linaro.org> > + */ > + > +#include <linux/backlight.h> > +#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_panel.h> > +#include <drm/drm_probe_helper.h> > +#include <drm/display/drm_dsc.h> > +#include <drm/display/drm_dsc_helper.h> > + > +#define NUM_SUPPLIES 2 > + > +struct sw43408_panel { > + struct drm_panel base; > + struct mipi_dsi_device *link; > + > + const struct drm_display_mode *mode; > + > + struct regulator_bulk_data supplies[NUM_SUPPLIES]; > + > + struct gpio_desc *reset_gpio; > + > + struct drm_dsc_config dsc; > +}; > + > +static inline struct sw43408_panel *to_panel_info(struct drm_panel *panel) > +{ > + return container_of(panel, struct sw43408_panel, base); > +} > + > +static int sw43408_unprepare(struct drm_panel *panel) > +{ > + struct sw43408_panel *ctx = to_panel_info(panel); > + int ret; > + > + ret = mipi_dsi_dcs_set_display_off(ctx->link); > + if (ret < 0) > + dev_err(panel->dev, "set_display_off cmd failed ret = %d\n", ret); > + > + ret = mipi_dsi_dcs_enter_sleep_mode(ctx->link); > + if (ret < 0) > + dev_err(panel->dev, "enter_sleep cmd failed ret = %d\n", ret); > + > + msleep(100); > + > + gpiod_set_value(ctx->reset_gpio, 1); > + > + return regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies); > +} > + > +static int sw43408_program(struct drm_panel *panel) > +{ > + struct sw43408_panel *ctx = to_panel_info(panel); > + struct drm_dsc_picture_parameter_set pps; > + > + mipi_dsi_dcs_write_seq(ctx->link, MIPI_DCS_SET_GAMMA_CURVE, 0x02); > + > + mipi_dsi_dcs_set_tear_on(ctx->link, MIPI_DSI_DCS_TEAR_MODE_VBLANK); > + > + mipi_dsi_dcs_write_seq(ctx->link, 0x53, 0x0c, 0x30); > + mipi_dsi_dcs_write_seq(ctx->link, 0x55, 0x00, 0x70, 0xdf, 0x00, 0x70, 0xdf); > + mipi_dsi_dcs_write_seq(ctx->link, 0xf7, 0x01, 0x49, 0x0c); > + > + mipi_dsi_dcs_exit_sleep_mode(ctx->link); > + > + msleep(135); > + > + /* COMPRESSION_MODE moved after setting the PPS */ > + > + mipi_dsi_dcs_write_seq(ctx->link, 0xb0, 0xac); > + mipi_dsi_dcs_write_seq(ctx->link, 0xe5, > + 0x00, 0x3a, 0x00, 0x3a, 0x00, 0x0e, 0x10); > + mipi_dsi_dcs_write_seq(ctx->link, 0xb5, > + 0x75, 0x60, 0x2d, 0x5d, 0x80, 0x00, 0x0a, 0x0b, > + 0x00, 0x05, 0x0b, 0x00, 0x80, 0x0d, 0x0e, 0x40, > + 0x00, 0x0c, 0x00, 0x16, 0x00, 0xb8, 0x00, 0x80, > + 0x0d, 0x0e, 0x40, 0x00, 0x0c, 0x00, 0x16, 0x00, > + 0xb8, 0x00, 0x81, 0x00, 0x03, 0x03, 0x03, 0x01, > + 0x01); > + msleep(85); > + mipi_dsi_dcs_write_seq(ctx->link, 0xcd, > + 0x00, 0x00, 0x00, 0x19, 0x19, 0x19, 0x19, 0x19, > + 0x19, 0x19, 0x19, 0x19, 0x19, 0x19, 0x19, 0x19, > + 0x16, 0x16); > + mipi_dsi_dcs_write_seq(ctx->link, 0xcb, 0x80, 0x5c, 0x07, 0x03, 0x28); > + mipi_dsi_dcs_write_seq(ctx->link, 0xc0, 0x02, 0x02, 0x0f); > + mipi_dsi_dcs_write_seq(ctx->link, 0x55, 0x04, 0x61, 0xdb, 0x04, 0x70, 0xdb); > + mipi_dsi_dcs_write_seq(ctx->link, 0xb0, 0xca); > + > + mipi_dsi_dcs_set_display_on(ctx->link); > + > + msleep(50); > + > + ctx->link->mode_flags &= ~MIPI_DSI_MODE_LPM; > + > + drm_dsc_pps_payload_pack(&pps, ctx->link->dsc); > + mipi_dsi_picture_parameter_set(ctx->link, &pps); > + > + /* This panel uses shifted PPS selectors: > + * 1 if pps_identifier is 0 > + * 2 if pps_identifier is 1 > + */ > + mipi_dsi_compression_mode_ext(ctx->link, true, > + MIPI_DSI_COMPRESSION_DSC, 1); Let's be careful to watch the order of parameters here whichever way you fix it up in the patch that introduces this function. > + > + ctx->link->mode_flags |= MIPI_DSI_MODE_LPM; > + > + return 0; > +} > + > +static int sw43408_prepare(struct drm_panel *panel) > +{ > + struct sw43408_panel *ctx = to_panel_info(panel); > + int ret; > + > + ret = regulator_bulk_enable(ARRAY_SIZE(ctx->supplies), ctx->supplies); > + if (ret < 0) > + return ret; > + > + usleep_range(5000, 6000); > + > + gpiod_set_value(ctx->reset_gpio, 0); > + usleep_range(9000, 10000); > + gpiod_set_value(ctx->reset_gpio, 1); > + usleep_range(1000, 2000); > + gpiod_set_value(ctx->reset_gpio, 0); > + usleep_range(9000, 10000); > + > + ret = sw43408_program(panel); > + if (ret) > + goto poweroff; > + > + return 0; > + > +poweroff: > + gpiod_set_value(ctx->reset_gpio, 1); > + regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies); > + return ret; > +} > + > +static int sw43408_get_modes(struct drm_panel *panel, > + struct drm_connector *connector) > +{ > + struct sw43408_panel *ctx = to_panel_info(panel); > + > + return drm_connector_helper_get_modes_fixed(connector, ctx->mode); > +} > + > +static int sw43408_backlight_update_status(struct backlight_device *bl) > +{ > + struct mipi_dsi_device *dsi = bl_get_data(bl); > + uint16_t brightness = backlight_get_brightness(bl); > + > + return mipi_dsi_dcs_set_display_brightness_large(dsi, brightness); > +} > + > +const struct backlight_ops sw43408_backlight_ops = { > + .update_status = sw43408_backlight_update_status, > +}; > + > +static int sw43408_backlight_init(struct sw43408_panel *ctx) > +{ > + struct device *dev = &ctx->link->dev; > + const struct backlight_properties props = { > + .type = BACKLIGHT_PLATFORM, > + .brightness = 255, > + .max_brightness = 255, > + }; > + > + ctx->base.backlight = devm_backlight_device_register(dev, dev_name(dev), dev, > + ctx->link, > + &sw43408_backlight_ops, > + &props); > + > + if (IS_ERR(ctx->base.backlight)) > + return dev_err_probe(dev, PTR_ERR(ctx->base.backlight), > + "Failed to create backlight\n"); > + > + return 0; > +} > + > +static const struct drm_panel_funcs sw43408_funcs = { > + .unprepare = sw43408_unprepare, > + .prepare = sw43408_prepare, > + .get_modes = sw43408_get_modes, > +}; > + > +static const struct drm_display_mode sw43408_default_mode = { > + .clock = 152340, Since this value is calculated from the values below, I prefer to just show the origin of the value: .clock = (1080 + 20 + 32 + 20) * (2160 + 20 + 4 + 20) * 60 / 1000, > + > + .hdisplay = 1080, > + .hsync_start = 1080 + 20, > + .hsync_end = 1080 + 20 + 32, > + .htotal = 1080 + 20 + 32 + 20, > + > + .vdisplay = 2160, > + .vsync_start = 2160 + 20, > + .vsync_end = 2160 + 20 + 4, > + .vtotal = 2160 + 20 + 4 + 20, > + > + .width_mm = 62, > + .height_mm = 124, > + > + .type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED, > +}; > + > +static const struct of_device_id sw43408_of_match[] = { > + { .compatible = "lg,sw43408", .data = &sw43408_default_mode }, Will you ever use multiple compatibles to select different modes? For panels that support multiple modes (e.g. a lot of high-end sony devices with their 4k@120Hz screens) I'm still planning on adding an atomic_prepare() to drm_bridge and drm_panel to make it possible to program the DSC block and send DCS relative to the selected mode (and/or perform a fluent mode switch). > + { /* sentinel */ } > +}; > +MODULE_DEVICE_TABLE(of, sw43408_of_match); > + > +static int sw43408_add(struct sw43408_panel *ctx) > +{ > + struct device *dev = &ctx->link->dev; > + int ret; > + > + ctx->supplies[0].supply = "vddi"; /* 1.88 V */ > + ctx->supplies[0].init_load_uA = 62000; > + ctx->supplies[1].supply = "vpnl"; /* 3.0 V */ > + ctx->supplies[1].init_load_uA = 857000; > + > + ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(ctx->supplies), > + ctx->supplies); > + if (ret < 0) > + return ret; > + > + ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW); > + if (IS_ERR(ctx->reset_gpio)) { > + dev_err(dev, "cannot get reset gpio %ld\n", > + PTR_ERR(ctx->reset_gpio)); > + return PTR_ERR(ctx->reset_gpio); > + } > + > + ret = sw43408_backlight_init(ctx); > + if (ret < 0) > + return ret; > + > + ctx->base.prepare_prev_first = true; > + > + drm_panel_init(&ctx->base, dev, &sw43408_funcs, DRM_MODE_CONNECTOR_DSI); > + > + drm_panel_add(&ctx->base); > + return ret; > +} > + > +static int sw43408_probe(struct mipi_dsi_device *dsi) > +{ > + struct sw43408_panel *ctx; > + int ret; > + > + ctx = devm_kzalloc(&dsi->dev, sizeof(*ctx), GFP_KERNEL); > + if (!ctx) > + return -ENOMEM; > + > + ctx->mode = of_device_get_match_data(&dsi->dev); > + dsi->mode_flags = MIPI_DSI_MODE_LPM; > + dsi->format = MIPI_DSI_FMT_RGB888; > + dsi->lanes = 4; > + > + ctx->link = dsi; > + mipi_dsi_set_drvdata(dsi, ctx); > + > + ret = sw43408_add(ctx); > + if (ret < 0) > + return ret; > + > + /* The panel is DSC panel only, set the dsc params */ Grammar? > + ctx->dsc.dsc_version_major = 0x1; > + ctx->dsc.dsc_version_minor = 0x1; > + > + /* slice_count * slice_width == width */ > + ctx->dsc.slice_height = 16; > + ctx->dsc.slice_width = 540; > + ctx->dsc.slice_count = 2; > + ctx->dsc.bits_per_component = 8; > + ctx->dsc.bits_per_pixel = 8 << 4; > + ctx->dsc.block_pred_enable = true; > + > + dsi->dsc = &ctx->dsc; > + > + return mipi_dsi_attach(dsi); > +} > + > +static void sw43408_remove(struct mipi_dsi_device *dsi) > +{ > + struct sw43408_panel *ctx = mipi_dsi_get_drvdata(dsi); > + int ret; > + > + ret = sw43408_unprepare(&ctx->base); > + if (ret < 0) > + dev_err(&dsi->dev, "failed to unprepare panel: %d\n", > + 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->base); > +} > + > +static struct mipi_dsi_driver sw43408_driver = { > + .driver = { > + .name = "panel-lg-sw43408", > + .of_match_table = sw43408_of_match, > + }, > + .probe = sw43408_probe, > + .remove = sw43408_remove, > +}; > +module_mipi_dsi_driver(sw43408_driver); > + > +MODULE_AUTHOR("Sumit Semwal <sumit.semwal@linaro.org>"); > +MODULE_DESCRIPTION("LG SW436408 MIPI-DSI LED panel"); > +MODULE_LICENSE("GPL"); > > -- > 2.39.2 >
On Tue, Apr 02, 2024 at 11:17:52PM +0200, Marijn Suijten wrote: > On 2024-04-02 02:51:15, Dmitry Baryshkov wrote: > > From: Sumit Semwal <sumit.semwal@linaro.org> > > > > LG SW43408 is 1080x2160, 4-lane MIPI-DSI panel, used in some Pixel3 > > phones. > > @60Hz? With the current settings and timings I'm only getting 30 Hz. I have to double the mode->clock to get 60. > > > > > Signed-off-by: Sumit Semwal <sumit.semwal@linaro.org> > > [vinod: Add DSC support] > > Signed-off-by: Vinod Koul <vkoul@kernel.org> > > [caleb: cleanup and support turning off the panel] > > Signed-off-by: Caleb Connolly <caleb@connolly.tech> > > [DB: partially rewrote the driver and fixed DSC programming] > > Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> > > Some small nits but I think this deserves a: > > Reviewed-by: Marijn Suijten <marijn.suijten@somainline.org> > > > --- > > MAINTAINERS | 8 + > > drivers/gpu/drm/panel/Kconfig | 11 ++ > > drivers/gpu/drm/panel/Makefile | 1 + > > drivers/gpu/drm/panel/panel-lg-sw43408.c | 326 +++++++++++++++++++++++++++++++ > > 4 files changed, 346 insertions(+) > > > > diff --git a/MAINTAINERS b/MAINTAINERS > > index d36c19c1bf81..4cc43c16e07e 100644 > > --- a/MAINTAINERS > > +++ b/MAINTAINERS > > @@ -6789,6 +6789,14 @@ S: Maintained > > F: Documentation/devicetree/bindings/display/panel/jadard,jd9365da-h3.yaml > > F: drivers/gpu/drm/panel/panel-jadard-jd9365da-h3.c > > > > +DRM DRIVER FOR LG SW43408 PANELS > > +M: Sumit Semwal <sumit.semwal@linaro.org> > > +M: Caleb Connolly <caleb.connolly@linaro.org> > > +S: Maintained > > +T: git git://anongit.freedesktop.org/drm/drm-misc > > +F: Documentation/devicetree/bindings/display/panel/lg,sw43408.yaml > > +F: drivers/gpu/drm/panel/panel-lg-sw43408.c > > + > > DRM DRIVER FOR LOGICVC DISPLAY CONTROLLER > > M: Paul Kocialkowski <paul.kocialkowski@bootlin.com> > > S: Supported > > diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig > > index 6dc451f58a3e..a55e9437c8cf 100644 > > --- a/drivers/gpu/drm/panel/Kconfig > > +++ b/drivers/gpu/drm/panel/Kconfig > > @@ -335,6 +335,17 @@ config DRM_PANEL_LG_LG4573 > > Say Y here if you want to enable support for LG4573 RGB panel. > > To compile this driver as a module, choose M here. > > > > +config DRM_PANEL_LG_SW43408 > > + tristate "LG SW43408 panel" > > + depends on OF > > + depends on DRM_MIPI_DSI > > + depends on BACKLIGHT_CLASS_DEVICE > > + help > > + Say Y here if you want to enable support for LG sw43408 panel. > > + The panel has a 1080x2160 resolution and uses > > + 24 bit RGB per pixel. It provides a MIPI DSI interface to > > + the host and has a built-in LED backlight. > > + > > config DRM_PANEL_MAGNACHIP_D53E6EA8966 > > tristate "Magnachip D53E6EA8966 DSI panel" > > depends on OF && SPI > > diff --git a/drivers/gpu/drm/panel/Makefile b/drivers/gpu/drm/panel/Makefile > > index 24a02655d726..0b40b010e8e7 100644 > > --- a/drivers/gpu/drm/panel/Makefile > > +++ b/drivers/gpu/drm/panel/Makefile > > @@ -34,6 +34,7 @@ obj-$(CONFIG_DRM_PANEL_LEADTEK_LTK050H3146W) += panel-leadtek-ltk050h3146w.o > > obj-$(CONFIG_DRM_PANEL_LEADTEK_LTK500HD1829) += panel-leadtek-ltk500hd1829.o > > obj-$(CONFIG_DRM_PANEL_LG_LB035Q02) += panel-lg-lb035q02.o > > obj-$(CONFIG_DRM_PANEL_LG_LG4573) += panel-lg-lg4573.o > > +obj-$(CONFIG_DRM_PANEL_LG_SW43408) += panel-lg-sw43408.o > > obj-$(CONFIG_DRM_PANEL_MAGNACHIP_D53E6EA8966) += panel-magnachip-d53e6ea8966.o > > obj-$(CONFIG_DRM_PANEL_NEC_NL8048HL11) += panel-nec-nl8048hl11.o > > obj-$(CONFIG_DRM_PANEL_NEWVISION_NV3051D) += panel-newvision-nv3051d.o > > diff --git a/drivers/gpu/drm/panel/panel-lg-sw43408.c b/drivers/gpu/drm/panel/panel-lg-sw43408.c > > new file mode 100644 > > index 000000000000..c7611bfa796b > > --- /dev/null > > +++ b/drivers/gpu/drm/panel/panel-lg-sw43408.c > > @@ -0,0 +1,326 @@ > > +// SPDX-License-Identifier: GPL-2.0+ > > +/* > > + * Copyright (C) 2019-2024 Linaro Ltd > > + * Author: Sumit Semwal <sumit.semwal@linaro.org> > > + * Dmitry Baryshkov <dmitry.baryshkov@linaro.org> > > + */ > > + > > +#include <linux/backlight.h> > > +#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_panel.h> > > +#include <drm/drm_probe_helper.h> > > +#include <drm/display/drm_dsc.h> > > +#include <drm/display/drm_dsc_helper.h> > > + > > +#define NUM_SUPPLIES 2 > > + > > +struct sw43408_panel { > > + struct drm_panel base; > > + struct mipi_dsi_device *link; > > + > > + const struct drm_display_mode *mode; > > + > > + struct regulator_bulk_data supplies[NUM_SUPPLIES]; > > + > > + struct gpio_desc *reset_gpio; > > + > > + struct drm_dsc_config dsc; > > +}; > > + > > +static inline struct sw43408_panel *to_panel_info(struct drm_panel *panel) > > +{ > > + return container_of(panel, struct sw43408_panel, base); > > +} > > + > > +static int sw43408_unprepare(struct drm_panel *panel) > > +{ > > + struct sw43408_panel *ctx = to_panel_info(panel); > > + int ret; > > + > > + ret = mipi_dsi_dcs_set_display_off(ctx->link); > > + if (ret < 0) > > + dev_err(panel->dev, "set_display_off cmd failed ret = %d\n", ret); > > + > > + ret = mipi_dsi_dcs_enter_sleep_mode(ctx->link); > > + if (ret < 0) > > + dev_err(panel->dev, "enter_sleep cmd failed ret = %d\n", ret); > > + > > + msleep(100); > > + > > + gpiod_set_value(ctx->reset_gpio, 1); > > + > > + return regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies); > > +} > > + > > +static int sw43408_program(struct drm_panel *panel) > > +{ > > + struct sw43408_panel *ctx = to_panel_info(panel); > > + struct drm_dsc_picture_parameter_set pps; > > + > > + mipi_dsi_dcs_write_seq(ctx->link, MIPI_DCS_SET_GAMMA_CURVE, 0x02); > > + > > + mipi_dsi_dcs_set_tear_on(ctx->link, MIPI_DSI_DCS_TEAR_MODE_VBLANK); > > + > > + mipi_dsi_dcs_write_seq(ctx->link, 0x53, 0x0c, 0x30); > > + mipi_dsi_dcs_write_seq(ctx->link, 0x55, 0x00, 0x70, 0xdf, 0x00, 0x70, 0xdf); > > + mipi_dsi_dcs_write_seq(ctx->link, 0xf7, 0x01, 0x49, 0x0c); > > + > > + mipi_dsi_dcs_exit_sleep_mode(ctx->link); > > + > > + msleep(135); > > + > > + /* COMPRESSION_MODE moved after setting the PPS */ > > + > > + mipi_dsi_dcs_write_seq(ctx->link, 0xb0, 0xac); > > + mipi_dsi_dcs_write_seq(ctx->link, 0xe5, > > + 0x00, 0x3a, 0x00, 0x3a, 0x00, 0x0e, 0x10); > > + mipi_dsi_dcs_write_seq(ctx->link, 0xb5, > > + 0x75, 0x60, 0x2d, 0x5d, 0x80, 0x00, 0x0a, 0x0b, > > + 0x00, 0x05, 0x0b, 0x00, 0x80, 0x0d, 0x0e, 0x40, > > + 0x00, 0x0c, 0x00, 0x16, 0x00, 0xb8, 0x00, 0x80, > > + 0x0d, 0x0e, 0x40, 0x00, 0x0c, 0x00, 0x16, 0x00, > > + 0xb8, 0x00, 0x81, 0x00, 0x03, 0x03, 0x03, 0x01, > > + 0x01); > > + msleep(85); > > + mipi_dsi_dcs_write_seq(ctx->link, 0xcd, > > + 0x00, 0x00, 0x00, 0x19, 0x19, 0x19, 0x19, 0x19, > > + 0x19, 0x19, 0x19, 0x19, 0x19, 0x19, 0x19, 0x19, > > + 0x16, 0x16); > > + mipi_dsi_dcs_write_seq(ctx->link, 0xcb, 0x80, 0x5c, 0x07, 0x03, 0x28); > > + mipi_dsi_dcs_write_seq(ctx->link, 0xc0, 0x02, 0x02, 0x0f); > > + mipi_dsi_dcs_write_seq(ctx->link, 0x55, 0x04, 0x61, 0xdb, 0x04, 0x70, 0xdb); > > + mipi_dsi_dcs_write_seq(ctx->link, 0xb0, 0xca); > > + > > + mipi_dsi_dcs_set_display_on(ctx->link); > > + > > + msleep(50); > > + > > + ctx->link->mode_flags &= ~MIPI_DSI_MODE_LPM; > > + > > + drm_dsc_pps_payload_pack(&pps, ctx->link->dsc); > > + mipi_dsi_picture_parameter_set(ctx->link, &pps); > > + > > + /* This panel uses shifted PPS selectors: > > + * 1 if pps_identifier is 0 > > + * 2 if pps_identifier is 1 > > + */ > > + mipi_dsi_compression_mode_ext(ctx->link, true, > > + MIPI_DSI_COMPRESSION_DSC, 1); > > Let's be careful to watch the order of parameters here whichever way you fix it > up in the patch that introduces this function. > > > + > > + ctx->link->mode_flags |= MIPI_DSI_MODE_LPM; > > + > > + return 0; > > +} > > + > > +static int sw43408_prepare(struct drm_panel *panel) > > +{ > > + struct sw43408_panel *ctx = to_panel_info(panel); > > + int ret; > > + > > + ret = regulator_bulk_enable(ARRAY_SIZE(ctx->supplies), ctx->supplies); > > + if (ret < 0) > > + return ret; > > + > > + usleep_range(5000, 6000); > > + > > + gpiod_set_value(ctx->reset_gpio, 0); > > + usleep_range(9000, 10000); > > + gpiod_set_value(ctx->reset_gpio, 1); > > + usleep_range(1000, 2000); > > + gpiod_set_value(ctx->reset_gpio, 0); > > + usleep_range(9000, 10000); > > + > > + ret = sw43408_program(panel); > > + if (ret) > > + goto poweroff; > > + > > + return 0; > > + > > +poweroff: > > + gpiod_set_value(ctx->reset_gpio, 1); > > + regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies); > > + return ret; > > +} > > + > > +static int sw43408_get_modes(struct drm_panel *panel, > > + struct drm_connector *connector) > > +{ > > + struct sw43408_panel *ctx = to_panel_info(panel); > > + > > + return drm_connector_helper_get_modes_fixed(connector, ctx->mode); > > +} > > + > > +static int sw43408_backlight_update_status(struct backlight_device *bl) > > +{ > > + struct mipi_dsi_device *dsi = bl_get_data(bl); > > + uint16_t brightness = backlight_get_brightness(bl); > > + > > + return mipi_dsi_dcs_set_display_brightness_large(dsi, brightness); > > +} > > + > > +const struct backlight_ops sw43408_backlight_ops = { > > + .update_status = sw43408_backlight_update_status, > > +}; > > + > > +static int sw43408_backlight_init(struct sw43408_panel *ctx) > > +{ > > + struct device *dev = &ctx->link->dev; > > + const struct backlight_properties props = { > > + .type = BACKLIGHT_PLATFORM, > > + .brightness = 255, > > + .max_brightness = 255, > > + }; > > + > > + ctx->base.backlight = devm_backlight_device_register(dev, dev_name(dev), dev, > > + ctx->link, > > + &sw43408_backlight_ops, > > + &props); > > + > > + if (IS_ERR(ctx->base.backlight)) > > + return dev_err_probe(dev, PTR_ERR(ctx->base.backlight), > > + "Failed to create backlight\n"); > > + > > + return 0; > > +} > > + > > +static const struct drm_panel_funcs sw43408_funcs = { > > + .unprepare = sw43408_unprepare, > > + .prepare = sw43408_prepare, > > + .get_modes = sw43408_get_modes, > > +}; > > + > > +static const struct drm_display_mode sw43408_default_mode = { > > + .clock = 152340, > > Since this value is calculated from the values below, I prefer to just show the > origin of the value: > > .clock = (1080 + 20 + 32 + 20) * (2160 + 20 + 4 + 20) * 60 / 1000, Sure > > > + > > + .hdisplay = 1080, > > + .hsync_start = 1080 + 20, > > + .hsync_end = 1080 + 20 + 32, > > + .htotal = 1080 + 20 + 32 + 20, > > + > > + .vdisplay = 2160, > > + .vsync_start = 2160 + 20, > > + .vsync_end = 2160 + 20 + 4, > > + .vtotal = 2160 + 20 + 4 + 20, > > + > > + .width_mm = 62, > > + .height_mm = 124, > > + > > + .type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED, > > +}; > > + > > +static const struct of_device_id sw43408_of_match[] = { > > + { .compatible = "lg,sw43408", .data = &sw43408_default_mode }, > > Will you ever use multiple compatibles to select different modes? > > For panels that support multiple modes (e.g. a lot of high-end sony devices > with their 4k@120Hz screens) I'm still planning on adding an atomic_prepare() to > drm_bridge and drm_panel to make it possible to program the DSC block and send > DCS relative to the selected mode (and/or perform a fluent mode switch). I think this got inherited from the initial implementation by Sumit. Let's rewrite this too. > > > + { /* sentinel */ } > > +}; > > +MODULE_DEVICE_TABLE(of, sw43408_of_match); > > + > > +static int sw43408_add(struct sw43408_panel *ctx) > > +{ > > + struct device *dev = &ctx->link->dev; > > + int ret; > > + > > + ctx->supplies[0].supply = "vddi"; /* 1.88 V */ > > + ctx->supplies[0].init_load_uA = 62000; > > + ctx->supplies[1].supply = "vpnl"; /* 3.0 V */ > > + ctx->supplies[1].init_load_uA = 857000; > > + > > + ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(ctx->supplies), > > + ctx->supplies); > > + if (ret < 0) > > + return ret; > > + > > + ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW); > > + if (IS_ERR(ctx->reset_gpio)) { > > + dev_err(dev, "cannot get reset gpio %ld\n", > > + PTR_ERR(ctx->reset_gpio)); > > + return PTR_ERR(ctx->reset_gpio); > > + } > > + > > + ret = sw43408_backlight_init(ctx); > > + if (ret < 0) > > + return ret; > > + > > + ctx->base.prepare_prev_first = true; > > + > > + drm_panel_init(&ctx->base, dev, &sw43408_funcs, DRM_MODE_CONNECTOR_DSI); > > + > > + drm_panel_add(&ctx->base); > > + return ret; > > +} > > + > > +static int sw43408_probe(struct mipi_dsi_device *dsi) > > +{ > > + struct sw43408_panel *ctx; > > + int ret; > > + > > + ctx = devm_kzalloc(&dsi->dev, sizeof(*ctx), GFP_KERNEL); > > + if (!ctx) > > + return -ENOMEM; > > + > > + ctx->mode = of_device_get_match_data(&dsi->dev); > > + dsi->mode_flags = MIPI_DSI_MODE_LPM; > > + dsi->format = MIPI_DSI_FMT_RGB888; > > + dsi->lanes = 4; > > + > > + ctx->link = dsi; > > + mipi_dsi_set_drvdata(dsi, ctx); > > + > > + ret = sw43408_add(ctx); > > + if (ret < 0) > > + return ret; > > + > > + /* The panel is DSC panel only, set the dsc params */ > > Grammar? > > > + ctx->dsc.dsc_version_major = 0x1; > > + ctx->dsc.dsc_version_minor = 0x1; > > + > > + /* slice_count * slice_width == width */ > > + ctx->dsc.slice_height = 16; > > + ctx->dsc.slice_width = 540; > > + ctx->dsc.slice_count = 2; > > + ctx->dsc.bits_per_component = 8; > > + ctx->dsc.bits_per_pixel = 8 << 4; > > + ctx->dsc.block_pred_enable = true; > > + > > + dsi->dsc = &ctx->dsc; > > + > > + return mipi_dsi_attach(dsi); > > +} > > + > > +static void sw43408_remove(struct mipi_dsi_device *dsi) > > +{ > > + struct sw43408_panel *ctx = mipi_dsi_get_drvdata(dsi); > > + int ret; > > + > > + ret = sw43408_unprepare(&ctx->base); > > + if (ret < 0) > > + dev_err(&dsi->dev, "failed to unprepare panel: %d\n", > > + 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->base); > > +} > > + > > +static struct mipi_dsi_driver sw43408_driver = { > > + .driver = { > > + .name = "panel-lg-sw43408", > > + .of_match_table = sw43408_of_match, > > + }, > > + .probe = sw43408_probe, > > + .remove = sw43408_remove, > > +}; > > +module_mipi_dsi_driver(sw43408_driver); > > + > > +MODULE_AUTHOR("Sumit Semwal <sumit.semwal@linaro.org>"); > > +MODULE_DESCRIPTION("LG SW436408 MIPI-DSI LED panel"); > > +MODULE_LICENSE("GPL"); > > > > -- > > 2.39.2 > >
On 2024-04-03 05:37:29, Dmitry Baryshkov wrote: > On Tue, Apr 02, 2024 at 11:17:52PM +0200, Marijn Suijten wrote: > > On 2024-04-02 02:51:15, Dmitry Baryshkov wrote: > > > From: Sumit Semwal <sumit.semwal@linaro.org> > > > > > > LG SW43408 is 1080x2160, 4-lane MIPI-DSI panel, used in some Pixel3 > > > phones. > > > > @60Hz? > > With the current settings and timings I'm only getting 30 Hz. I have to > double the mode->clock to get 60. Still seems useful to mention (here and in Kconfig). The proposed driver emits a mode to userspace of 60Hz, maybe the commit message should say that in the current state "something" prevents it from going that fast? Since I keep forgetting (because it's not mentioned anywhere) that this is a cmdmode panel (or at least configured for that with the current driver), I'd again suggest to play with sync_cfg_height. If setting it to 0xfff0 results in timeouts, your tear GPIO is misconfigured and not making the MDP aware of the actual tick rate. Otherwise, more likely, just bump up the porches a bit, based on the discussions around reduce_pclk_for_compression() /not/ accounting for transfer time in cmdmode. In one of my drivers (pending eternal cleanup hell) I inlined the calculation to reverse what the "right" porch should be based on a downstream clock rate: https://github.com/somainline/linux/commit/85978a69cde088a23963c03758dad5f1a2e79bab#diff-a9ac8689e45c59a4fe9aa150e4bd53675687f5c8b4aecb40b5b5b66b864257e0R353-R366 And separately, though I cannot find it, there have been (more accurate?) calculations based on downstream `qcom,mdss-dsi-panel-jitter` and friends. - Marijn
diff --git a/MAINTAINERS b/MAINTAINERS index d36c19c1bf81..4cc43c16e07e 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -6789,6 +6789,14 @@ S: Maintained F: Documentation/devicetree/bindings/display/panel/jadard,jd9365da-h3.yaml F: drivers/gpu/drm/panel/panel-jadard-jd9365da-h3.c +DRM DRIVER FOR LG SW43408 PANELS +M: Sumit Semwal <sumit.semwal@linaro.org> +M: Caleb Connolly <caleb.connolly@linaro.org> +S: Maintained +T: git git://anongit.freedesktop.org/drm/drm-misc +F: Documentation/devicetree/bindings/display/panel/lg,sw43408.yaml +F: drivers/gpu/drm/panel/panel-lg-sw43408.c + DRM DRIVER FOR LOGICVC DISPLAY CONTROLLER M: Paul Kocialkowski <paul.kocialkowski@bootlin.com> S: Supported diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig index 6dc451f58a3e..a55e9437c8cf 100644 --- a/drivers/gpu/drm/panel/Kconfig +++ b/drivers/gpu/drm/panel/Kconfig @@ -335,6 +335,17 @@ config DRM_PANEL_LG_LG4573 Say Y here if you want to enable support for LG4573 RGB panel. To compile this driver as a module, choose M here. +config DRM_PANEL_LG_SW43408 + tristate "LG SW43408 panel" + depends on OF + depends on DRM_MIPI_DSI + depends on BACKLIGHT_CLASS_DEVICE + help + Say Y here if you want to enable support for LG sw43408 panel. + The panel has a 1080x2160 resolution and uses + 24 bit RGB per pixel. It provides a MIPI DSI interface to + the host and has a built-in LED backlight. + config DRM_PANEL_MAGNACHIP_D53E6EA8966 tristate "Magnachip D53E6EA8966 DSI panel" depends on OF && SPI diff --git a/drivers/gpu/drm/panel/Makefile b/drivers/gpu/drm/panel/Makefile index 24a02655d726..0b40b010e8e7 100644 --- a/drivers/gpu/drm/panel/Makefile +++ b/drivers/gpu/drm/panel/Makefile @@ -34,6 +34,7 @@ obj-$(CONFIG_DRM_PANEL_LEADTEK_LTK050H3146W) += panel-leadtek-ltk050h3146w.o obj-$(CONFIG_DRM_PANEL_LEADTEK_LTK500HD1829) += panel-leadtek-ltk500hd1829.o obj-$(CONFIG_DRM_PANEL_LG_LB035Q02) += panel-lg-lb035q02.o obj-$(CONFIG_DRM_PANEL_LG_LG4573) += panel-lg-lg4573.o +obj-$(CONFIG_DRM_PANEL_LG_SW43408) += panel-lg-sw43408.o obj-$(CONFIG_DRM_PANEL_MAGNACHIP_D53E6EA8966) += panel-magnachip-d53e6ea8966.o obj-$(CONFIG_DRM_PANEL_NEC_NL8048HL11) += panel-nec-nl8048hl11.o obj-$(CONFIG_DRM_PANEL_NEWVISION_NV3051D) += panel-newvision-nv3051d.o diff --git a/drivers/gpu/drm/panel/panel-lg-sw43408.c b/drivers/gpu/drm/panel/panel-lg-sw43408.c new file mode 100644 index 000000000000..c7611bfa796b --- /dev/null +++ b/drivers/gpu/drm/panel/panel-lg-sw43408.c @@ -0,0 +1,326 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (C) 2019-2024 Linaro Ltd + * Author: Sumit Semwal <sumit.semwal@linaro.org> + * Dmitry Baryshkov <dmitry.baryshkov@linaro.org> + */ + +#include <linux/backlight.h> +#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_panel.h> +#include <drm/drm_probe_helper.h> +#include <drm/display/drm_dsc.h> +#include <drm/display/drm_dsc_helper.h> + +#define NUM_SUPPLIES 2 + +struct sw43408_panel { + struct drm_panel base; + struct mipi_dsi_device *link; + + const struct drm_display_mode *mode; + + struct regulator_bulk_data supplies[NUM_SUPPLIES]; + + struct gpio_desc *reset_gpio; + + struct drm_dsc_config dsc; +}; + +static inline struct sw43408_panel *to_panel_info(struct drm_panel *panel) +{ + return container_of(panel, struct sw43408_panel, base); +} + +static int sw43408_unprepare(struct drm_panel *panel) +{ + struct sw43408_panel *ctx = to_panel_info(panel); + int ret; + + ret = mipi_dsi_dcs_set_display_off(ctx->link); + if (ret < 0) + dev_err(panel->dev, "set_display_off cmd failed ret = %d\n", ret); + + ret = mipi_dsi_dcs_enter_sleep_mode(ctx->link); + if (ret < 0) + dev_err(panel->dev, "enter_sleep cmd failed ret = %d\n", ret); + + msleep(100); + + gpiod_set_value(ctx->reset_gpio, 1); + + return regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies); +} + +static int sw43408_program(struct drm_panel *panel) +{ + struct sw43408_panel *ctx = to_panel_info(panel); + struct drm_dsc_picture_parameter_set pps; + + mipi_dsi_dcs_write_seq(ctx->link, MIPI_DCS_SET_GAMMA_CURVE, 0x02); + + mipi_dsi_dcs_set_tear_on(ctx->link, MIPI_DSI_DCS_TEAR_MODE_VBLANK); + + mipi_dsi_dcs_write_seq(ctx->link, 0x53, 0x0c, 0x30); + mipi_dsi_dcs_write_seq(ctx->link, 0x55, 0x00, 0x70, 0xdf, 0x00, 0x70, 0xdf); + mipi_dsi_dcs_write_seq(ctx->link, 0xf7, 0x01, 0x49, 0x0c); + + mipi_dsi_dcs_exit_sleep_mode(ctx->link); + + msleep(135); + + /* COMPRESSION_MODE moved after setting the PPS */ + + mipi_dsi_dcs_write_seq(ctx->link, 0xb0, 0xac); + mipi_dsi_dcs_write_seq(ctx->link, 0xe5, + 0x00, 0x3a, 0x00, 0x3a, 0x00, 0x0e, 0x10); + mipi_dsi_dcs_write_seq(ctx->link, 0xb5, + 0x75, 0x60, 0x2d, 0x5d, 0x80, 0x00, 0x0a, 0x0b, + 0x00, 0x05, 0x0b, 0x00, 0x80, 0x0d, 0x0e, 0x40, + 0x00, 0x0c, 0x00, 0x16, 0x00, 0xb8, 0x00, 0x80, + 0x0d, 0x0e, 0x40, 0x00, 0x0c, 0x00, 0x16, 0x00, + 0xb8, 0x00, 0x81, 0x00, 0x03, 0x03, 0x03, 0x01, + 0x01); + msleep(85); + mipi_dsi_dcs_write_seq(ctx->link, 0xcd, + 0x00, 0x00, 0x00, 0x19, 0x19, 0x19, 0x19, 0x19, + 0x19, 0x19, 0x19, 0x19, 0x19, 0x19, 0x19, 0x19, + 0x16, 0x16); + mipi_dsi_dcs_write_seq(ctx->link, 0xcb, 0x80, 0x5c, 0x07, 0x03, 0x28); + mipi_dsi_dcs_write_seq(ctx->link, 0xc0, 0x02, 0x02, 0x0f); + mipi_dsi_dcs_write_seq(ctx->link, 0x55, 0x04, 0x61, 0xdb, 0x04, 0x70, 0xdb); + mipi_dsi_dcs_write_seq(ctx->link, 0xb0, 0xca); + + mipi_dsi_dcs_set_display_on(ctx->link); + + msleep(50); + + ctx->link->mode_flags &= ~MIPI_DSI_MODE_LPM; + + drm_dsc_pps_payload_pack(&pps, ctx->link->dsc); + mipi_dsi_picture_parameter_set(ctx->link, &pps); + + /* This panel uses shifted PPS selectors: + * 1 if pps_identifier is 0 + * 2 if pps_identifier is 1 + */ + mipi_dsi_compression_mode_ext(ctx->link, true, + MIPI_DSI_COMPRESSION_DSC, 1); + + ctx->link->mode_flags |= MIPI_DSI_MODE_LPM; + + return 0; +} + +static int sw43408_prepare(struct drm_panel *panel) +{ + struct sw43408_panel *ctx = to_panel_info(panel); + int ret; + + ret = regulator_bulk_enable(ARRAY_SIZE(ctx->supplies), ctx->supplies); + if (ret < 0) + return ret; + + usleep_range(5000, 6000); + + gpiod_set_value(ctx->reset_gpio, 0); + usleep_range(9000, 10000); + gpiod_set_value(ctx->reset_gpio, 1); + usleep_range(1000, 2000); + gpiod_set_value(ctx->reset_gpio, 0); + usleep_range(9000, 10000); + + ret = sw43408_program(panel); + if (ret) + goto poweroff; + + return 0; + +poweroff: + gpiod_set_value(ctx->reset_gpio, 1); + regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies); + return ret; +} + +static int sw43408_get_modes(struct drm_panel *panel, + struct drm_connector *connector) +{ + struct sw43408_panel *ctx = to_panel_info(panel); + + return drm_connector_helper_get_modes_fixed(connector, ctx->mode); +} + +static int sw43408_backlight_update_status(struct backlight_device *bl) +{ + struct mipi_dsi_device *dsi = bl_get_data(bl); + uint16_t brightness = backlight_get_brightness(bl); + + return mipi_dsi_dcs_set_display_brightness_large(dsi, brightness); +} + +const struct backlight_ops sw43408_backlight_ops = { + .update_status = sw43408_backlight_update_status, +}; + +static int sw43408_backlight_init(struct sw43408_panel *ctx) +{ + struct device *dev = &ctx->link->dev; + const struct backlight_properties props = { + .type = BACKLIGHT_PLATFORM, + .brightness = 255, + .max_brightness = 255, + }; + + ctx->base.backlight = devm_backlight_device_register(dev, dev_name(dev), dev, + ctx->link, + &sw43408_backlight_ops, + &props); + + if (IS_ERR(ctx->base.backlight)) + return dev_err_probe(dev, PTR_ERR(ctx->base.backlight), + "Failed to create backlight\n"); + + return 0; +} + +static const struct drm_panel_funcs sw43408_funcs = { + .unprepare = sw43408_unprepare, + .prepare = sw43408_prepare, + .get_modes = sw43408_get_modes, +}; + +static const struct drm_display_mode sw43408_default_mode = { + .clock = 152340, + + .hdisplay = 1080, + .hsync_start = 1080 + 20, + .hsync_end = 1080 + 20 + 32, + .htotal = 1080 + 20 + 32 + 20, + + .vdisplay = 2160, + .vsync_start = 2160 + 20, + .vsync_end = 2160 + 20 + 4, + .vtotal = 2160 + 20 + 4 + 20, + + .width_mm = 62, + .height_mm = 124, + + .type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED, +}; + +static const struct of_device_id sw43408_of_match[] = { + { .compatible = "lg,sw43408", .data = &sw43408_default_mode }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, sw43408_of_match); + +static int sw43408_add(struct sw43408_panel *ctx) +{ + struct device *dev = &ctx->link->dev; + int ret; + + ctx->supplies[0].supply = "vddi"; /* 1.88 V */ + ctx->supplies[0].init_load_uA = 62000; + ctx->supplies[1].supply = "vpnl"; /* 3.0 V */ + ctx->supplies[1].init_load_uA = 857000; + + ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(ctx->supplies), + ctx->supplies); + if (ret < 0) + return ret; + + ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW); + if (IS_ERR(ctx->reset_gpio)) { + dev_err(dev, "cannot get reset gpio %ld\n", + PTR_ERR(ctx->reset_gpio)); + return PTR_ERR(ctx->reset_gpio); + } + + ret = sw43408_backlight_init(ctx); + if (ret < 0) + return ret; + + ctx->base.prepare_prev_first = true; + + drm_panel_init(&ctx->base, dev, &sw43408_funcs, DRM_MODE_CONNECTOR_DSI); + + drm_panel_add(&ctx->base); + return ret; +} + +static int sw43408_probe(struct mipi_dsi_device *dsi) +{ + struct sw43408_panel *ctx; + int ret; + + ctx = devm_kzalloc(&dsi->dev, sizeof(*ctx), GFP_KERNEL); + if (!ctx) + return -ENOMEM; + + ctx->mode = of_device_get_match_data(&dsi->dev); + dsi->mode_flags = MIPI_DSI_MODE_LPM; + dsi->format = MIPI_DSI_FMT_RGB888; + dsi->lanes = 4; + + ctx->link = dsi; + mipi_dsi_set_drvdata(dsi, ctx); + + ret = sw43408_add(ctx); + if (ret < 0) + return ret; + + /* The panel is DSC panel only, set the dsc params */ + ctx->dsc.dsc_version_major = 0x1; + ctx->dsc.dsc_version_minor = 0x1; + + /* slice_count * slice_width == width */ + ctx->dsc.slice_height = 16; + ctx->dsc.slice_width = 540; + ctx->dsc.slice_count = 2; + ctx->dsc.bits_per_component = 8; + ctx->dsc.bits_per_pixel = 8 << 4; + ctx->dsc.block_pred_enable = true; + + dsi->dsc = &ctx->dsc; + + return mipi_dsi_attach(dsi); +} + +static void sw43408_remove(struct mipi_dsi_device *dsi) +{ + struct sw43408_panel *ctx = mipi_dsi_get_drvdata(dsi); + int ret; + + ret = sw43408_unprepare(&ctx->base); + if (ret < 0) + dev_err(&dsi->dev, "failed to unprepare panel: %d\n", + 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->base); +} + +static struct mipi_dsi_driver sw43408_driver = { + .driver = { + .name = "panel-lg-sw43408", + .of_match_table = sw43408_of_match, + }, + .probe = sw43408_probe, + .remove = sw43408_remove, +}; +module_mipi_dsi_driver(sw43408_driver); + +MODULE_AUTHOR("Sumit Semwal <sumit.semwal@linaro.org>"); +MODULE_DESCRIPTION("LG SW436408 MIPI-DSI LED panel"); +MODULE_LICENSE("GPL");