| Message ID | 20240416-raydium-rm69380-driver-v3-2-21600ac4ce5f@mainlining.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Add driver for Raydium RM69380-based DSI panels | expand |
On Tue, Apr 16, 2024 at 08:30:49PM +0200, David Wronek wrote: > Add support for the 2560x1600@90Hz OLED panel by EDO bundled with a > Raydium RM69380 controller, as found on the Lenovo Xiaoxin Pad Pro 2021. > > Signed-off-by: David Wronek <david@mainlining.org> > --- > drivers/gpu/drm/panel/Kconfig | 14 + > drivers/gpu/drm/panel/Makefile | 1 + > drivers/gpu/drm/panel/panel-raydium-rm69380.c | 367 ++++++++++++++++++++++++++ > 3 files changed, 382 insertions(+) Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Le 16/04/2024 à 20:30, David Wronek a écrit : > Add support for the 2560x1600@90Hz OLED panel by EDO bundled with a > Raydium RM69380 controller, as found on the Lenovo Xiaoxin Pad Pro 2021. > > Signed-off-by: David Wronek <david-vu3DzTD92ROXwddmVfQv5g@public.gmane.org> > --- > drivers/gpu/drm/panel/Kconfig | 14 + > drivers/gpu/drm/panel/Makefile | 1 + > drivers/gpu/drm/panel/panel-raydium-rm69380.c | 367 ++++++++++++++++++++++++++ > 3 files changed, 382 insertions(+) > ... > +static int rm69380_probe(struct mipi_dsi_device *dsi) > +{ > + struct mipi_dsi_host *dsi_sec_host; > + struct rm69380_panel *ctx; > + struct device *dev = &dsi->dev; > + struct device_node *dsi_sec; > + int ret, i; > + > + ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL); > + if (!ctx) > + return -ENOMEM; > + > + ctx->supplies[0].supply = "vddio"; > + ctx->supplies[1].supply = "avdd"; > + ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(ctx->supplies), > + ctx->supplies); > + if (ret < 0) > + return dev_err_probe(dev, ret, "Failed to get regulators\n"); > + > + 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"); > + > + dsi_sec = of_graph_get_remote_node(dsi->dev.of_node, 1, -1); > + > + if (dsi_sec) { > + const struct mipi_dsi_device_info info = { "RM69380", 0, > + dsi_sec }; > + > + dev_dbg(dev, "Using Dual-DSI: found `%s`\n", dsi_sec->name); > + > + dsi_sec_host = of_find_mipi_dsi_host_by_node(dsi_sec); > + of_node_put(dsi_sec); > + if (!dsi_sec_host) > + return dev_err_probe(dev, -EPROBE_DEFER, > + "Cannot get secondary DSI host\n"); > + > + ctx->dsi[1] = > + devm_mipi_dsi_device_register_full(dev, dsi_sec_host, &info); > + if (IS_ERR(ctx->dsi[1])) > + return dev_err_probe(dev, PTR_ERR(ctx->dsi[1]), > + "Cannot get secondary DSI node\n"); > + > + dev_dbg(dev, "Second DSI name `%s`\n", ctx->dsi[1]->name); > + mipi_dsi_set_drvdata(ctx->dsi[1], ctx); > + } else { > + dev_dbg(dev, "Using Single-DSI\n"); > + } > + > + ctx->dsi[0] = dsi; > + mipi_dsi_set_drvdata(dsi, ctx); > + > + drm_panel_init(&ctx->panel, dev, &rm69380_panel_funcs, > + DRM_MODE_CONNECTOR_DSI); > + ctx->panel.prepare_prev_first = true; > + > + ctx->panel.backlight = rm69380_create_backlight(dsi); > + if (IS_ERR(ctx->panel.backlight)) > + return dev_err_probe(dev, PTR_ERR(ctx->panel.backlight), > + "Failed to create backlight\n"); > + > + drm_panel_add(&ctx->panel); > + > + for (i = 0; i < ARRAY_SIZE(ctx->dsi); i++) { > + if (!ctx->dsi[i]) > + continue; > + > + dev_dbg(&ctx->dsi[i]->dev, "Binding DSI %d\n", i); > + > + ctx->dsi[i]->lanes = 4; > + ctx->dsi[i]->format = MIPI_DSI_FMT_RGB888; > + ctx->dsi[i]->mode_flags = MIPI_DSI_MODE_VIDEO_BURST | > + MIPI_DSI_CLOCK_NON_CONTINUOUS; > + > + ret = mipi_dsi_attach(ctx->dsi[i]); > + if (ret < 0) { > + mipi_dsi_detach(ctx->dsi[i]); I don't think this works. if 'i' fails, you have to detach 0...i-1 maybe something like below (complety untested). > + drm_panel_remove(&ctx->panel); > + return dev_err_probe(dev, ret, > + "Failed to attach to DSI%d\n", i); > + } > + } > + > + return 0; > +} drm_panel_add(&ctx->panel); for (i = 0; i < ARRAY_SIZE(ctx->dsi); i++) { if (!ctx->dsi[i]) continue; dev_dbg(&ctx->dsi[i]->dev, "Binding DSI %d\n", i); ctx->dsi[i]->lanes = 4; ctx->dsi[i]->format = MIPI_DSI_FMT_RGB888; ctx->dsi[i]->mode_flags = MIPI_DSI_MODE_VIDEO_BURST | MIPI_DSI_CLOCK_NON_CONTINUOUS; ret = mipi_dsi_attach(ctx->dsi[i]); if (ret < 0) { dev_err_probe(dev, ret, "Failed to attach to DSI%d\n", i); goto err_detach_dsi; } } return 0; err_detach_dsi: while (--i >= 0) if (ctx->dsi[i]) mipi_dsi_detach(ctx->dsi[i]); drm_panel_remove(&ctx->panel); return ret; }
On 2024-04-16 20:30:49, David Wronek wrote: > Add support for the 2560x1600@90Hz OLED panel by EDO bundled with a > Raydium RM69380 controller, as found on the Lenovo Xiaoxin Pad Pro 2021. > > Signed-off-by: David Wronek <david@mainlining.org> > --- > drivers/gpu/drm/panel/Kconfig | 14 + > drivers/gpu/drm/panel/Makefile | 1 + > drivers/gpu/drm/panel/panel-raydium-rm69380.c | 367 ++++++++++++++++++++++++++ > 3 files changed, 382 insertions(+) > > diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig > index 154f5bf82980..5b3eeb93b1a2 100644 > --- a/drivers/gpu/drm/panel/Kconfig > +++ b/drivers/gpu/drm/panel/Kconfig > @@ -542,6 +542,20 @@ config DRM_PANEL_RAYDIUM_RM692E5 > Say Y here if you want to enable support for Raydium RM692E5-based > display panels, such as the one found in the Fairphone 5 smartphone. > > +config DRM_PANEL_RAYDIUM_RM69380 > + tristate "Raydium RM69380-based DSI panel" > + depends on BACKLIGHT_CLASS_DEVICE > + depends on DRM_DISPLAY_DP_HELPER "DRM DisplayPort helpers" But you said that this is a DSI device? Looking in -next from yesterday, Raydium-RM692E5 and Visionox-R66451 get this wrong as well. > + depends on DRM_DISPLAY_HELPER This also looks unused? The only helpers in the non-DP non-HDMI helper points to more DP AUX code. > + depends on DRM_MIPI_DSI > + depends on OF As I've shown in the SOFEF00 cleanup patch, devm_gpiod_get() is used which is behind GPIOLIB. This should probably be a dependency. > + help > + Say Y here if you want to enable support for Raydium RM69380-based > + display panels. > + > + This panel controller can be found in the Lenovo Xiaoxin Pad Pro 2021 > + in combination with an EDO OLED panel. > + > config DRM_PANEL_RONBO_RB070D30 > tristate "Ronbo Electronics RB070D30 panel" > depends on OF > diff --git a/drivers/gpu/drm/panel/Makefile b/drivers/gpu/drm/panel/Makefile > index 24a02655d726..e2a2807d4ef0 100644 > --- a/drivers/gpu/drm/panel/Makefile > +++ b/drivers/gpu/drm/panel/Makefile > @@ -55,6 +55,7 @@ obj-$(CONFIG_DRM_PANEL_RASPBERRYPI_TOUCHSCREEN) += panel-raspberrypi-touchscreen > obj-$(CONFIG_DRM_PANEL_RAYDIUM_RM67191) += panel-raydium-rm67191.o > obj-$(CONFIG_DRM_PANEL_RAYDIUM_RM68200) += panel-raydium-rm68200.o > obj-$(CONFIG_DRM_PANEL_RAYDIUM_RM692E5) += panel-raydium-rm692e5.o > +obj-$(CONFIG_DRM_PANEL_RAYDIUM_RM69380) += panel-raydium-rm69380.o > obj-$(CONFIG_DRM_PANEL_RONBO_RB070D30) += panel-ronbo-rb070d30.o > obj-$(CONFIG_DRM_PANEL_SAMSUNG_ATNA33XC20) += panel-samsung-atna33xc20.o > obj-$(CONFIG_DRM_PANEL_SAMSUNG_DB7430) += panel-samsung-db7430.o > diff --git a/drivers/gpu/drm/panel/panel-raydium-rm69380.c b/drivers/gpu/drm/panel/panel-raydium-rm69380.c > new file mode 100644 > index 000000000000..f89230c969b7 > --- /dev/null > +++ b/drivers/gpu/drm/panel/panel-raydium-rm69380.c > @@ -0,0 +1,367 @@ > +// SPDX-License-Identifier: GPL-2.0-only > +/* > + * Generated with linux-mdss-dsi-panel-driver-generator from vendor device tree. > + * Copyright (c) 2024 David Wronek <david@mainlining.org> > + */ > + > +#include <linux/backlight.h> > +#include <linux/delay.h> > +#include <linux/gpio/consumer.h> > +#include <linux/module.h> > +#include <linux/of.h> > +#include <linux/of_device.h> > +#include <linux/of_graph.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 rm69380_panel { > + struct drm_panel panel; > + struct mipi_dsi_device *dsi[2]; > + struct regulator_bulk_data supplies[2]; > + struct gpio_desc *reset_gpio; > +}; > + > +static inline > +struct rm69380_panel *to_rm69380_panel(struct drm_panel *panel) > +{ > + return container_of(panel, struct rm69380_panel, panel); > +} > + > +static void rm69380_reset(struct rm69380_panel *ctx) > +{ > + gpiod_set_value_cansleep(ctx->reset_gpio, 0); > + usleep_range(15000, 16000); > + gpiod_set_value_cansleep(ctx->reset_gpio, 1); > + usleep_range(10000, 11000); > + gpiod_set_value_cansleep(ctx->reset_gpio, 0); > + msleep(30); > +} > + > +static int rm69380_on(struct rm69380_panel *ctx) > +{ > + struct mipi_dsi_device *dsi = ctx->dsi[0]; > + struct device *dev = &dsi->dev; > + int ret; > + > + dsi->mode_flags |= MIPI_DSI_MODE_LPM; > + if (ctx->dsi[1]) > + ctx->dsi[1]->mode_flags |= MIPI_DSI_MODE_LPM; > + > + mipi_dsi_dcs_write_seq(dsi, 0xfe, 0xd4); > + mipi_dsi_dcs_write_seq(dsi, 0x00, 0x80); Is this MIPI_DCS_NOP? Strange to see that with a parameter. > + mipi_dsi_dcs_write_seq(dsi, 0xfe, 0xd0); > + mipi_dsi_dcs_write_seq(dsi, 0x48, 0x00); > + mipi_dsi_dcs_write_seq(dsi, 0xfe, 0x26); > + mipi_dsi_dcs_write_seq(dsi, 0x75, 0x3f); > + mipi_dsi_dcs_write_seq(dsi, 0x1d, 0x1a); > + mipi_dsi_dcs_write_seq(dsi, 0xfe, 0x00); > + mipi_dsi_dcs_write_seq(dsi, MIPI_DCS_WRITE_CONTROL_DISPLAY, 0x28); Separate from this patch, I feel like we should document these bits. Their meaning might be defined by a paywall, intersecting a few downstream DTS with DCS commands makes it instantly clear what each bit means. > + mipi_dsi_dcs_write_seq(dsi, 0xc2, 0x08); > + > + ret = mipi_dsi_dcs_set_tear_on(dsi, MIPI_DSI_DCS_TEAR_MODE_VBLANK); > + if (ret < 0) { > + dev_err(dev, "Failed to set tear on: %d\n", ret); > + return ret; > + } > + > + ret = mipi_dsi_dcs_set_display_brightness(dsi, 0x7ff); > + if (ret < 0) { > + dev_err(dev, "Failed to set display brightness: %d\n", ret); > + return ret; > + } > + > + 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(20); > + > + ret = mipi_dsi_dcs_set_display_on(dsi); > + if (ret < 0) { > + dev_err(dev, "Failed to set display on: %d\n", ret); > + return ret; > + } > + msleep(36); > + > + return 0; > +} > + > +static int rm69380_off(struct rm69380_panel *ctx) > +{ > + struct mipi_dsi_device *dsi = ctx->dsi[0]; > + struct device *dev = &dsi->dev; > + int ret; > + > + dsi->mode_flags &= ~MIPI_DSI_MODE_LPM; > + if (ctx->dsi[1]) > + ctx->dsi[1]->mode_flags &= ~MIPI_DSI_MODE_LPM; > + > + ret = mipi_dsi_dcs_set_display_off(dsi); > + if (ret < 0) { > + dev_err(dev, "Failed to set display off: %d\n", ret); > + return ret; > + } > + msleep(35); > + > + 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(20); > + > + return 0; > +} > + > +static int rm69380_prepare(struct drm_panel *panel) > +{ > + struct rm69380_panel *ctx = to_rm69380_panel(panel); > + struct device *dev = &ctx->dsi[0]->dev; > + int ret; > + > + ret = regulator_bulk_enable(ARRAY_SIZE(ctx->supplies), ctx->supplies); > + if (ret < 0) { > + dev_err(dev, "Failed to enable regulators: %d\n", ret); > + return ret; > + } > + > + rm69380_reset(ctx); > + > + ret = rm69380_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(ctx->supplies), ctx->supplies); > + return ret; > + } > + > + return 0; > +} > + > +static int rm69380_unprepare(struct drm_panel *panel) > +{ > + struct rm69380_panel *ctx = to_rm69380_panel(panel); > + struct device *dev = &ctx->dsi[0]->dev; > + int ret; > + > + ret = rm69380_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(ctx->supplies), ctx->supplies); > + > + return 0; > +} > + > +static const struct drm_display_mode rm69380_mode = { > + .clock = (2560 + 32 + 12 + 38) * (1600 + 20 + 4 + 8) * 90 / 1000, > + .hdisplay = 2560, > + .hsync_start = 2560 + 32, > + .hsync_end = 2560 + 32 + 12, > + .htotal = 2560 + 32 + 12 + 38, > + .vdisplay = 1600, > + .vsync_start = 1600 + 20, > + .vsync_end = 1600 + 20 + 4, > + .vtotal = 1600 + 20 + 4 + 8, > + .width_mm = 248, > + .height_mm = 155, > + .type = DRM_MODE_TYPE_DRIVER, > +}; > + > +static int rm69380_get_modes(struct drm_panel *panel, > + struct drm_connector *connector) > +{ > + return drm_connector_helper_get_modes_fixed(connector, &rm69380_mode); > +} > + > +static const struct drm_panel_funcs rm69380_panel_funcs = { > + .prepare = rm69380_prepare, > + .unprepare = rm69380_unprepare, > + .get_modes = rm69380_get_modes, > +}; > + > +static int rm69380_bl_update_status(struct backlight_device *bl) > +{ > + struct mipi_dsi_device *dsi = bl_get_data(bl); > + u16 brightness = backlight_get_brightness(bl); > + int ret; > + > + dsi->mode_flags &= ~MIPI_DSI_MODE_LPM; > + > + ret = mipi_dsi_dcs_set_display_brightness_large(dsi, brightness); > + if (ret < 0) > + return ret; > + > + dsi->mode_flags |= MIPI_DSI_MODE_LPM; > + > + return 0; > +} > + > +static int rm69380_bl_get_brightness(struct backlight_device *bl) > +{ > + struct mipi_dsi_device *dsi = bl_get_data(bl); > + u16 brightness; > + int ret; > + > + dsi->mode_flags &= ~MIPI_DSI_MODE_LPM; > + > + ret = mipi_dsi_dcs_get_display_brightness_large(dsi, &brightness); > + if (ret < 0) > + return ret; > + > + dsi->mode_flags |= MIPI_DSI_MODE_LPM; > + > + return brightness; > +} > + > +static const struct backlight_ops rm69380_bl_ops = { > + .update_status = rm69380_bl_update_status, > + .get_brightness = rm69380_bl_get_brightness, > +}; > + > +static struct backlight_device * > +rm69380_create_backlight(struct mipi_dsi_device *dsi) > +{ > + struct device *dev = &dsi->dev; > + const struct backlight_properties props = { > + .type = BACKLIGHT_RAW, > + .brightness = 2047, Might be nice to reduce the init brightness to something lower, like 1023 or 511? But also drop the brightness call in _on(). > + .max_brightness = 2047, > + }; > + > + return devm_backlight_device_register(dev, dev_name(dev), dev, dsi, > + &rm69380_bl_ops, &props); > +} > + > +static int rm69380_probe(struct mipi_dsi_device *dsi) > +{ > + struct mipi_dsi_host *dsi_sec_host; > + struct rm69380_panel *ctx; > + struct device *dev = &dsi->dev; > + struct device_node *dsi_sec; > + int ret, i; > + > + ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL); > + if (!ctx) > + return -ENOMEM; > + > + ctx->supplies[0].supply = "vddio"; > + ctx->supplies[1].supply = "avdd"; > + ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(ctx->supplies), > + ctx->supplies); > + if (ret < 0) > + return dev_err_probe(dev, ret, "Failed to get regulators\n"); > + > + 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"); > + > + dsi_sec = of_graph_get_remote_node(dsi->dev.of_node, 1, -1); > + > + if (dsi_sec) { > + const struct mipi_dsi_device_info info = { "RM69380", 0, > + dsi_sec }; > + > + dev_dbg(dev, "Using Dual-DSI: found `%s`\n", dsi_sec->name); > + > + dsi_sec_host = of_find_mipi_dsi_host_by_node(dsi_sec); > + of_node_put(dsi_sec); > + if (!dsi_sec_host) > + return dev_err_probe(dev, -EPROBE_DEFER, > + "Cannot get secondary DSI host\n"); > + > + ctx->dsi[1] = > + devm_mipi_dsi_device_register_full(dev, dsi_sec_host, &info); > + if (IS_ERR(ctx->dsi[1])) > + return dev_err_probe(dev, PTR_ERR(ctx->dsi[1]), > + "Cannot get secondary DSI node\n"); > + > + dev_dbg(dev, "Second DSI name `%s`\n", ctx->dsi[1]->name); Let's drop my debug logs :) > + mipi_dsi_set_drvdata(ctx->dsi[1], ctx); > + } else { > + dev_dbg(dev, "Using Single-DSI\n"); > + } > + > + ctx->dsi[0] = dsi; > + mipi_dsi_set_drvdata(dsi, ctx); > + > + drm_panel_init(&ctx->panel, dev, &rm69380_panel_funcs, > + DRM_MODE_CONNECTOR_DSI); > + ctx->panel.prepare_prev_first = true; > + > + ctx->panel.backlight = rm69380_create_backlight(dsi); > + if (IS_ERR(ctx->panel.backlight)) > + return dev_err_probe(dev, PTR_ERR(ctx->panel.backlight), > + "Failed to create backlight\n"); > + > + drm_panel_add(&ctx->panel); > + > + for (i = 0; i < ARRAY_SIZE(ctx->dsi); i++) { > + if (!ctx->dsi[i]) > + continue; > + > + dev_dbg(&ctx->dsi[i]->dev, "Binding DSI %d\n", i); Probably not very useful? > + > + ctx->dsi[i]->lanes = 4; > + ctx->dsi[i]->format = MIPI_DSI_FMT_RGB888; > + ctx->dsi[i]->mode_flags = MIPI_DSI_MODE_VIDEO_BURST | > + MIPI_DSI_CLOCK_NON_CONTINUOUS; > + > + ret = mipi_dsi_attach(ctx->dsi[i]); > + if (ret < 0) { > + mipi_dsi_detach(ctx->dsi[i]); This isn't sound as written. If attaching fails, it is likely an error to detach the same DSI device. The error scenario that Christophe pointed out is when attaching dsi[1] fails, in this case you have to detach dsi[0]. But as written in late v2 review, instead of making complicated logic statements there is a matching devm_mipi_dsi_attach() to handle these cleanup scenarios for you. This should also remove the need for mipi_dsi_attach() in the _remove function. - Marijn > + drm_panel_remove(&ctx->panel); > + return dev_err_probe(dev, ret, > + "Failed to attach to DSI%d\n", i); > + } > + } > + > + return 0; > +} > + > +static void rm69380_remove(struct mipi_dsi_device *dsi) > +{ > + struct rm69380_panel *ctx = mipi_dsi_get_drvdata(dsi); > + int i; > + int ret; > + > + for (i = 0; i < ARRAY_SIZE(ctx->dsi); i++) { > + if (!ctx->dsi[i]) > + continue; > + > + ret = mipi_dsi_detach(ctx->dsi[i]); > + if (ret < 0) > + dev_err(&dsi->dev, "Failed to detach from DSI%d host: %d\n", i, ret); > + } > + > + drm_panel_remove(&ctx->panel); > +} > + > +static const struct of_device_id rm69380_of_match[] = { > + { .compatible = "lenovo,j716f-edo-rm69380" }, > + { /* sentinel */ } > +}; > +MODULE_DEVICE_TABLE(of, rm69380_of_match); > + > +static struct mipi_dsi_driver rm69380_panel_driver = { > + .probe = rm69380_probe, > + .remove = rm69380_remove, > + .driver = { > + .name = "panel-raydium-rm69380", > + .of_match_table = rm69380_of_match, > + }, > +}; > +module_mipi_dsi_driver(rm69380_panel_driver); > + > +MODULE_AUTHOR("David Wronek <david@mainlining.org"); > +MODULE_DESCRIPTION("DRM driver for Raydium RM69380-equipped DSI panels"); > +MODULE_LICENSE("GPL"); > > -- > 2.44.0 >
W dniu 2024-04-16 22:52, Marijn Suijten napisał(a): > On 2024-04-16 20:30:49, David Wronek wrote: >> Add support for the 2560x1600@90Hz OLED panel by EDO bundled with a >> Raydium RM69380 controller, as found on the Lenovo Xiaoxin Pad Pro >> 2021. >> >> Signed-off-by: David Wronek <david@mainlining.org> >> --- >> drivers/gpu/drm/panel/Kconfig | 14 + >> drivers/gpu/drm/panel/Makefile | 1 + >> drivers/gpu/drm/panel/panel-raydium-rm69380.c | 367 >> ++++++++++++++++++++++++++ >> 3 files changed, 382 insertions(+) >> >> diff --git a/drivers/gpu/drm/panel/Kconfig >> b/drivers/gpu/drm/panel/Kconfig >> index 154f5bf82980..5b3eeb93b1a2 100644 >> --- a/drivers/gpu/drm/panel/Kconfig >> +++ b/drivers/gpu/drm/panel/Kconfig >> @@ -542,6 +542,20 @@ config DRM_PANEL_RAYDIUM_RM692E5 >> Say Y here if you want to enable support for Raydium RM692E5-based >> display panels, such as the one found in the Fairphone 5 >> smartphone. >> >> +config DRM_PANEL_RAYDIUM_RM69380 >> + tristate "Raydium RM69380-based DSI panel" >> + depends on BACKLIGHT_CLASS_DEVICE >> + depends on DRM_DISPLAY_DP_HELPER > > "DRM DisplayPort helpers" > > But you said that this is a DSI device? > > Looking in -next from yesterday, Raydium-RM692E5 and Visionox-R66451 > get this > wrong as well. > >> + depends on DRM_DISPLAY_HELPER > > This also looks unused? The only helpers in the non-DP non-HDMI helper > points > to more DP AUX code. > >> + depends on DRM_MIPI_DSI >> + depends on OF > > As I've shown in the SOFEF00 cleanup patch, devm_gpiod_get() is used > which is > behind GPIOLIB. This should probably be a dependency. > >> + help >> + Say Y here if you want to enable support for Raydium RM69380-based >> + display panels. >> + >> + This panel controller can be found in the Lenovo Xiaoxin Pad Pro >> 2021 >> + in combination with an EDO OLED panel. >> + >> config DRM_PANEL_RONBO_RB070D30 >> tristate "Ronbo Electronics RB070D30 panel" >> depends on OF >> diff --git a/drivers/gpu/drm/panel/Makefile >> b/drivers/gpu/drm/panel/Makefile >> index 24a02655d726..e2a2807d4ef0 100644 >> --- a/drivers/gpu/drm/panel/Makefile >> +++ b/drivers/gpu/drm/panel/Makefile >> @@ -55,6 +55,7 @@ obj-$(CONFIG_DRM_PANEL_RASPBERRYPI_TOUCHSCREEN) += >> panel-raspberrypi-touchscreen >> obj-$(CONFIG_DRM_PANEL_RAYDIUM_RM67191) += panel-raydium-rm67191.o >> obj-$(CONFIG_DRM_PANEL_RAYDIUM_RM68200) += panel-raydium-rm68200.o >> obj-$(CONFIG_DRM_PANEL_RAYDIUM_RM692E5) += panel-raydium-rm692e5.o >> +obj-$(CONFIG_DRM_PANEL_RAYDIUM_RM69380) += panel-raydium-rm69380.o >> obj-$(CONFIG_DRM_PANEL_RONBO_RB070D30) += panel-ronbo-rb070d30.o >> obj-$(CONFIG_DRM_PANEL_SAMSUNG_ATNA33XC20) += >> panel-samsung-atna33xc20.o >> obj-$(CONFIG_DRM_PANEL_SAMSUNG_DB7430) += panel-samsung-db7430.o >> diff --git a/drivers/gpu/drm/panel/panel-raydium-rm69380.c >> b/drivers/gpu/drm/panel/panel-raydium-rm69380.c >> new file mode 100644 >> index 000000000000..f89230c969b7 >> --- /dev/null >> +++ b/drivers/gpu/drm/panel/panel-raydium-rm69380.c >> @@ -0,0 +1,367 @@ >> +// SPDX-License-Identifier: GPL-2.0-only >> +/* >> + * Generated with linux-mdss-dsi-panel-driver-generator from vendor >> device tree. >> + * Copyright (c) 2024 David Wronek <david@mainlining.org> >> + */ >> + >> +#include <linux/backlight.h> >> +#include <linux/delay.h> >> +#include <linux/gpio/consumer.h> >> +#include <linux/module.h> >> +#include <linux/of.h> >> +#include <linux/of_device.h> >> +#include <linux/of_graph.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 rm69380_panel { >> + struct drm_panel panel; >> + struct mipi_dsi_device *dsi[2]; >> + struct regulator_bulk_data supplies[2]; >> + struct gpio_desc *reset_gpio; >> +}; >> + >> +static inline >> +struct rm69380_panel *to_rm69380_panel(struct drm_panel *panel) >> +{ >> + return container_of(panel, struct rm69380_panel, panel); >> +} >> + >> +static void rm69380_reset(struct rm69380_panel *ctx) >> +{ >> + gpiod_set_value_cansleep(ctx->reset_gpio, 0); >> + usleep_range(15000, 16000); >> + gpiod_set_value_cansleep(ctx->reset_gpio, 1); >> + usleep_range(10000, 11000); >> + gpiod_set_value_cansleep(ctx->reset_gpio, 0); >> + msleep(30); >> +} >> + >> +static int rm69380_on(struct rm69380_panel *ctx) >> +{ >> + struct mipi_dsi_device *dsi = ctx->dsi[0]; >> + struct device *dev = &dsi->dev; >> + int ret; >> + >> + dsi->mode_flags |= MIPI_DSI_MODE_LPM; >> + if (ctx->dsi[1]) >> + ctx->dsi[1]->mode_flags |= MIPI_DSI_MODE_LPM; >> + >> + mipi_dsi_dcs_write_seq(dsi, 0xfe, 0xd4); >> + mipi_dsi_dcs_write_seq(dsi, 0x00, 0x80); > > Is this MIPI_DCS_NOP? Strange to see that with a parameter. > I don't think it is. 0xfe is the command to switch the 'manufacture command set'. As you can see, it switches to a different MCS right after this one. Given that I don't have a datasheet for this perticular driver IC, I can't be absolutely certain, but considering that the drivers for rm67191 and rm68200 are defining 0xfe as the command to switch the commands sets, it's probably the same here. >> + mipi_dsi_dcs_write_seq(dsi, 0xfe, 0xd0); >> + mipi_dsi_dcs_write_seq(dsi, 0x48, 0x00); >> + mipi_dsi_dcs_write_seq(dsi, 0xfe, 0x26); >> + mipi_dsi_dcs_write_seq(dsi, 0x75, 0x3f); >> + mipi_dsi_dcs_write_seq(dsi, 0x1d, 0x1a); >> + mipi_dsi_dcs_write_seq(dsi, 0xfe, 0x00); >> + mipi_dsi_dcs_write_seq(dsi, MIPI_DCS_WRITE_CONTROL_DISPLAY, 0x28); > > Separate from this patch, I feel like we should document these bits. > Their > meaning might be defined by a paywall, intersecting a few downstream > DTS with > DCS commands makes it instantly clear what each bit means. > >> + mipi_dsi_dcs_write_seq(dsi, 0xc2, 0x08); >> + >> + ret = mipi_dsi_dcs_set_tear_on(dsi, MIPI_DSI_DCS_TEAR_MODE_VBLANK); >> + if (ret < 0) { >> + dev_err(dev, "Failed to set tear on: %d\n", ret); >> + return ret; >> + } >> + >> + ret = mipi_dsi_dcs_set_display_brightness(dsi, 0x7ff); >> + if (ret < 0) { >> + dev_err(dev, "Failed to set display brightness: %d\n", ret); >> + return ret; >> + } >> + >> + 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(20); >> + >> + ret = mipi_dsi_dcs_set_display_on(dsi); >> + if (ret < 0) { >> + dev_err(dev, "Failed to set display on: %d\n", ret); >> + return ret; >> + } >> + msleep(36); >> + >> + return 0; >> +} >> + >> +static int rm69380_off(struct rm69380_panel *ctx) >> +{ >> + struct mipi_dsi_device *dsi = ctx->dsi[0]; >> + struct device *dev = &dsi->dev; >> + int ret; >> + >> + dsi->mode_flags &= ~MIPI_DSI_MODE_LPM; >> + if (ctx->dsi[1]) >> + ctx->dsi[1]->mode_flags &= ~MIPI_DSI_MODE_LPM; >> + >> + ret = mipi_dsi_dcs_set_display_off(dsi); >> + if (ret < 0) { >> + dev_err(dev, "Failed to set display off: %d\n", ret); >> + return ret; >> + } >> + msleep(35); >> + >> + 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(20); >> + >> + return 0; >> +} >> + >> +static int rm69380_prepare(struct drm_panel *panel) >> +{ >> + struct rm69380_panel *ctx = to_rm69380_panel(panel); >> + struct device *dev = &ctx->dsi[0]->dev; >> + int ret; >> + >> + ret = regulator_bulk_enable(ARRAY_SIZE(ctx->supplies), >> ctx->supplies); >> + if (ret < 0) { >> + dev_err(dev, "Failed to enable regulators: %d\n", ret); >> + return ret; >> + } >> + >> + rm69380_reset(ctx); >> + >> + ret = rm69380_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(ctx->supplies), ctx->supplies); >> + return ret; >> + } >> + >> + return 0; >> +} >> + >> +static int rm69380_unprepare(struct drm_panel *panel) >> +{ >> + struct rm69380_panel *ctx = to_rm69380_panel(panel); >> + struct device *dev = &ctx->dsi[0]->dev; >> + int ret; >> + >> + ret = rm69380_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(ctx->supplies), ctx->supplies); >> + >> + return 0; >> +} >> + >> +static const struct drm_display_mode rm69380_mode = { >> + .clock = (2560 + 32 + 12 + 38) * (1600 + 20 + 4 + 8) * 90 / 1000, >> + .hdisplay = 2560, >> + .hsync_start = 2560 + 32, >> + .hsync_end = 2560 + 32 + 12, >> + .htotal = 2560 + 32 + 12 + 38, >> + .vdisplay = 1600, >> + .vsync_start = 1600 + 20, >> + .vsync_end = 1600 + 20 + 4, >> + .vtotal = 1600 + 20 + 4 + 8, >> + .width_mm = 248, >> + .height_mm = 155, >> + .type = DRM_MODE_TYPE_DRIVER, >> +}; >> + >> +static int rm69380_get_modes(struct drm_panel *panel, >> + struct drm_connector *connector) >> +{ >> + return drm_connector_helper_get_modes_fixed(connector, >> &rm69380_mode); >> +} >> + >> +static const struct drm_panel_funcs rm69380_panel_funcs = { >> + .prepare = rm69380_prepare, >> + .unprepare = rm69380_unprepare, >> + .get_modes = rm69380_get_modes, >> +}; >> + >> +static int rm69380_bl_update_status(struct backlight_device *bl) >> +{ >> + struct mipi_dsi_device *dsi = bl_get_data(bl); >> + u16 brightness = backlight_get_brightness(bl); >> + int ret; >> + >> + dsi->mode_flags &= ~MIPI_DSI_MODE_LPM; >> + >> + ret = mipi_dsi_dcs_set_display_brightness_large(dsi, brightness); >> + if (ret < 0) >> + return ret; >> + >> + dsi->mode_flags |= MIPI_DSI_MODE_LPM; >> + >> + return 0; >> +} >> + >> +static int rm69380_bl_get_brightness(struct backlight_device *bl) >> +{ >> + struct mipi_dsi_device *dsi = bl_get_data(bl); >> + u16 brightness; >> + int ret; >> + >> + dsi->mode_flags &= ~MIPI_DSI_MODE_LPM; >> + >> + ret = mipi_dsi_dcs_get_display_brightness_large(dsi, &brightness); >> + if (ret < 0) >> + return ret; >> + >> + dsi->mode_flags |= MIPI_DSI_MODE_LPM; >> + >> + return brightness; >> +} >> + >> +static const struct backlight_ops rm69380_bl_ops = { >> + .update_status = rm69380_bl_update_status, >> + .get_brightness = rm69380_bl_get_brightness, >> +}; >> + >> +static struct backlight_device * >> +rm69380_create_backlight(struct mipi_dsi_device *dsi) >> +{ >> + struct device *dev = &dsi->dev; >> + const struct backlight_properties props = { >> + .type = BACKLIGHT_RAW, >> + .brightness = 2047, > > Might be nice to reduce the init brightness to something lower, like > 1023 or > 511? But also drop the brightness call in _on(). > Good call, the OLED panel on my tablet likes to burn-in (temporarily) really fast on high brightness. I did however notice that at least on an Arch Linux ARM rootfs, the brightness is being remembered and restored upon boot. >> + .max_brightness = 2047, >> + }; >> + >> + return devm_backlight_device_register(dev, dev_name(dev), dev, dsi, >> + &rm69380_bl_ops, &props); >> +} >> + >> +static int rm69380_probe(struct mipi_dsi_device *dsi) >> +{ >> + struct mipi_dsi_host *dsi_sec_host; >> + struct rm69380_panel *ctx; >> + struct device *dev = &dsi->dev; >> + struct device_node *dsi_sec; >> + int ret, i; >> + >> + ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL); >> + if (!ctx) >> + return -ENOMEM; >> + >> + ctx->supplies[0].supply = "vddio"; >> + ctx->supplies[1].supply = "avdd"; >> + ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(ctx->supplies), >> + ctx->supplies); >> + if (ret < 0) >> + return dev_err_probe(dev, ret, "Failed to get regulators\n"); >> + >> + 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"); >> + >> + dsi_sec = of_graph_get_remote_node(dsi->dev.of_node, 1, -1); >> + >> + if (dsi_sec) { >> + const struct mipi_dsi_device_info info = { "RM69380", 0, >> + dsi_sec }; >> + >> + dev_dbg(dev, "Using Dual-DSI: found `%s`\n", dsi_sec->name); >> + >> + dsi_sec_host = of_find_mipi_dsi_host_by_node(dsi_sec); >> + of_node_put(dsi_sec); >> + if (!dsi_sec_host) >> + return dev_err_probe(dev, -EPROBE_DEFER, >> + "Cannot get secondary DSI host\n"); >> + >> + ctx->dsi[1] = >> + devm_mipi_dsi_device_register_full(dev, dsi_sec_host, &info); >> + if (IS_ERR(ctx->dsi[1])) >> + return dev_err_probe(dev, PTR_ERR(ctx->dsi[1]), >> + "Cannot get secondary DSI node\n"); >> + >> + dev_dbg(dev, "Second DSI name `%s`\n", ctx->dsi[1]->name); > > Let's drop my debug logs :) > >> + mipi_dsi_set_drvdata(ctx->dsi[1], ctx); >> + } else { >> + dev_dbg(dev, "Using Single-DSI\n"); >> + } >> + >> + ctx->dsi[0] = dsi; >> + mipi_dsi_set_drvdata(dsi, ctx); >> + >> + drm_panel_init(&ctx->panel, dev, &rm69380_panel_funcs, >> + DRM_MODE_CONNECTOR_DSI); >> + ctx->panel.prepare_prev_first = true; >> + >> + ctx->panel.backlight = rm69380_create_backlight(dsi); >> + if (IS_ERR(ctx->panel.backlight)) >> + return dev_err_probe(dev, PTR_ERR(ctx->panel.backlight), >> + "Failed to create backlight\n"); >> + >> + drm_panel_add(&ctx->panel); >> + >> + for (i = 0; i < ARRAY_SIZE(ctx->dsi); i++) { >> + if (!ctx->dsi[i]) >> + continue; >> + >> + dev_dbg(&ctx->dsi[i]->dev, "Binding DSI %d\n", i); > > Probably not very useful? > >> + >> + ctx->dsi[i]->lanes = 4; >> + ctx->dsi[i]->format = MIPI_DSI_FMT_RGB888; >> + ctx->dsi[i]->mode_flags = MIPI_DSI_MODE_VIDEO_BURST | >> + MIPI_DSI_CLOCK_NON_CONTINUOUS; >> + >> + ret = mipi_dsi_attach(ctx->dsi[i]); >> + if (ret < 0) { >> + mipi_dsi_detach(ctx->dsi[i]); > > This isn't sound as written. If attaching fails, it is likely an error > to > detach the same DSI device. > > The error scenario that Christophe pointed out is when attaching dsi[1] > fails, in this case you have to detach dsi[0]. But as written in late > v2 > review, instead of making complicated logic statements there is a > matching > devm_mipi_dsi_attach() to handle these cleanup scenarios for you. This > should > also remove the need for mipi_dsi_attach() in the _remove function. > > - Marijn > >> + drm_panel_remove(&ctx->panel); >> + return dev_err_probe(dev, ret, >> + "Failed to attach to DSI%d\n", i); >> + } >> + } >> + >> + return 0; >> +} >> + >> +static void rm69380_remove(struct mipi_dsi_device *dsi) >> +{ >> + struct rm69380_panel *ctx = mipi_dsi_get_drvdata(dsi); >> + int i; >> + int ret; >> + >> + for (i = 0; i < ARRAY_SIZE(ctx->dsi); i++) { >> + if (!ctx->dsi[i]) >> + continue; >> + >> + ret = mipi_dsi_detach(ctx->dsi[i]); >> + if (ret < 0) >> + dev_err(&dsi->dev, "Failed to detach from DSI%d host: %d\n", i, >> ret); >> + } >> + >> + drm_panel_remove(&ctx->panel); >> +} >> + >> +static const struct of_device_id rm69380_of_match[] = { >> + { .compatible = "lenovo,j716f-edo-rm69380" }, >> + { /* sentinel */ } >> +}; >> +MODULE_DEVICE_TABLE(of, rm69380_of_match); >> + >> +static struct mipi_dsi_driver rm69380_panel_driver = { >> + .probe = rm69380_probe, >> + .remove = rm69380_remove, >> + .driver = { >> + .name = "panel-raydium-rm69380", >> + .of_match_table = rm69380_of_match, >> + }, >> +}; >> +module_mipi_dsi_driver(rm69380_panel_driver); >> + >> +MODULE_AUTHOR("David Wronek <david@mainlining.org"); >> +MODULE_DESCRIPTION("DRM driver for Raydium RM69380-equipped DSI >> panels"); >> +MODULE_LICENSE("GPL"); >> >> -- >> 2.44.0 >>
diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig index 154f5bf82980..5b3eeb93b1a2 100644 --- a/drivers/gpu/drm/panel/Kconfig +++ b/drivers/gpu/drm/panel/Kconfig @@ -542,6 +542,20 @@ config DRM_PANEL_RAYDIUM_RM692E5 Say Y here if you want to enable support for Raydium RM692E5-based display panels, such as the one found in the Fairphone 5 smartphone. +config DRM_PANEL_RAYDIUM_RM69380 + tristate "Raydium RM69380-based DSI panel" + depends on BACKLIGHT_CLASS_DEVICE + depends on DRM_DISPLAY_DP_HELPER + depends on DRM_DISPLAY_HELPER + depends on DRM_MIPI_DSI + depends on OF + help + Say Y here if you want to enable support for Raydium RM69380-based + display panels. + + This panel controller can be found in the Lenovo Xiaoxin Pad Pro 2021 + in combination with an EDO OLED panel. + config DRM_PANEL_RONBO_RB070D30 tristate "Ronbo Electronics RB070D30 panel" depends on OF diff --git a/drivers/gpu/drm/panel/Makefile b/drivers/gpu/drm/panel/Makefile index 24a02655d726..e2a2807d4ef0 100644 --- a/drivers/gpu/drm/panel/Makefile +++ b/drivers/gpu/drm/panel/Makefile @@ -55,6 +55,7 @@ obj-$(CONFIG_DRM_PANEL_RASPBERRYPI_TOUCHSCREEN) += panel-raspberrypi-touchscreen obj-$(CONFIG_DRM_PANEL_RAYDIUM_RM67191) += panel-raydium-rm67191.o obj-$(CONFIG_DRM_PANEL_RAYDIUM_RM68200) += panel-raydium-rm68200.o obj-$(CONFIG_DRM_PANEL_RAYDIUM_RM692E5) += panel-raydium-rm692e5.o +obj-$(CONFIG_DRM_PANEL_RAYDIUM_RM69380) += panel-raydium-rm69380.o obj-$(CONFIG_DRM_PANEL_RONBO_RB070D30) += panel-ronbo-rb070d30.o obj-$(CONFIG_DRM_PANEL_SAMSUNG_ATNA33XC20) += panel-samsung-atna33xc20.o obj-$(CONFIG_DRM_PANEL_SAMSUNG_DB7430) += panel-samsung-db7430.o diff --git a/drivers/gpu/drm/panel/panel-raydium-rm69380.c b/drivers/gpu/drm/panel/panel-raydium-rm69380.c new file mode 100644 index 000000000000..f89230c969b7 --- /dev/null +++ b/drivers/gpu/drm/panel/panel-raydium-rm69380.c @@ -0,0 +1,367 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Generated with linux-mdss-dsi-panel-driver-generator from vendor device tree. + * Copyright (c) 2024 David Wronek <david@mainlining.org> + */ + +#include <linux/backlight.h> +#include <linux/delay.h> +#include <linux/gpio/consumer.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/of_device.h> +#include <linux/of_graph.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 rm69380_panel { + struct drm_panel panel; + struct mipi_dsi_device *dsi[2]; + struct regulator_bulk_data supplies[2]; + struct gpio_desc *reset_gpio; +}; + +static inline +struct rm69380_panel *to_rm69380_panel(struct drm_panel *panel) +{ + return container_of(panel, struct rm69380_panel, panel); +} + +static void rm69380_reset(struct rm69380_panel *ctx) +{ + gpiod_set_value_cansleep(ctx->reset_gpio, 0); + usleep_range(15000, 16000); + gpiod_set_value_cansleep(ctx->reset_gpio, 1); + usleep_range(10000, 11000); + gpiod_set_value_cansleep(ctx->reset_gpio, 0); + msleep(30); +} + +static int rm69380_on(struct rm69380_panel *ctx) +{ + struct mipi_dsi_device *dsi = ctx->dsi[0]; + struct device *dev = &dsi->dev; + int ret; + + dsi->mode_flags |= MIPI_DSI_MODE_LPM; + if (ctx->dsi[1]) + ctx->dsi[1]->mode_flags |= MIPI_DSI_MODE_LPM; + + mipi_dsi_dcs_write_seq(dsi, 0xfe, 0xd4); + mipi_dsi_dcs_write_seq(dsi, 0x00, 0x80); + mipi_dsi_dcs_write_seq(dsi, 0xfe, 0xd0); + mipi_dsi_dcs_write_seq(dsi, 0x48, 0x00); + mipi_dsi_dcs_write_seq(dsi, 0xfe, 0x26); + mipi_dsi_dcs_write_seq(dsi, 0x75, 0x3f); + mipi_dsi_dcs_write_seq(dsi, 0x1d, 0x1a); + mipi_dsi_dcs_write_seq(dsi, 0xfe, 0x00); + mipi_dsi_dcs_write_seq(dsi, MIPI_DCS_WRITE_CONTROL_DISPLAY, 0x28); + mipi_dsi_dcs_write_seq(dsi, 0xc2, 0x08); + + ret = mipi_dsi_dcs_set_tear_on(dsi, MIPI_DSI_DCS_TEAR_MODE_VBLANK); + if (ret < 0) { + dev_err(dev, "Failed to set tear on: %d\n", ret); + return ret; + } + + ret = mipi_dsi_dcs_set_display_brightness(dsi, 0x7ff); + if (ret < 0) { + dev_err(dev, "Failed to set display brightness: %d\n", ret); + return ret; + } + + 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(20); + + ret = mipi_dsi_dcs_set_display_on(dsi); + if (ret < 0) { + dev_err(dev, "Failed to set display on: %d\n", ret); + return ret; + } + msleep(36); + + return 0; +} + +static int rm69380_off(struct rm69380_panel *ctx) +{ + struct mipi_dsi_device *dsi = ctx->dsi[0]; + struct device *dev = &dsi->dev; + int ret; + + dsi->mode_flags &= ~MIPI_DSI_MODE_LPM; + if (ctx->dsi[1]) + ctx->dsi[1]->mode_flags &= ~MIPI_DSI_MODE_LPM; + + ret = mipi_dsi_dcs_set_display_off(dsi); + if (ret < 0) { + dev_err(dev, "Failed to set display off: %d\n", ret); + return ret; + } + msleep(35); + + 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(20); + + return 0; +} + +static int rm69380_prepare(struct drm_panel *panel) +{ + struct rm69380_panel *ctx = to_rm69380_panel(panel); + struct device *dev = &ctx->dsi[0]->dev; + int ret; + + ret = regulator_bulk_enable(ARRAY_SIZE(ctx->supplies), ctx->supplies); + if (ret < 0) { + dev_err(dev, "Failed to enable regulators: %d\n", ret); + return ret; + } + + rm69380_reset(ctx); + + ret = rm69380_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(ctx->supplies), ctx->supplies); + return ret; + } + + return 0; +} + +static int rm69380_unprepare(struct drm_panel *panel) +{ + struct rm69380_panel *ctx = to_rm69380_panel(panel); + struct device *dev = &ctx->dsi[0]->dev; + int ret; + + ret = rm69380_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(ctx->supplies), ctx->supplies); + + return 0; +} + +static const struct drm_display_mode rm69380_mode = { + .clock = (2560 + 32 + 12 + 38) * (1600 + 20 + 4 + 8) * 90 / 1000, + .hdisplay = 2560, + .hsync_start = 2560 + 32, + .hsync_end = 2560 + 32 + 12, + .htotal = 2560 + 32 + 12 + 38, + .vdisplay = 1600, + .vsync_start = 1600 + 20, + .vsync_end = 1600 + 20 + 4, + .vtotal = 1600 + 20 + 4 + 8, + .width_mm = 248, + .height_mm = 155, + .type = DRM_MODE_TYPE_DRIVER, +}; + +static int rm69380_get_modes(struct drm_panel *panel, + struct drm_connector *connector) +{ + return drm_connector_helper_get_modes_fixed(connector, &rm69380_mode); +} + +static const struct drm_panel_funcs rm69380_panel_funcs = { + .prepare = rm69380_prepare, + .unprepare = rm69380_unprepare, + .get_modes = rm69380_get_modes, +}; + +static int rm69380_bl_update_status(struct backlight_device *bl) +{ + struct mipi_dsi_device *dsi = bl_get_data(bl); + u16 brightness = backlight_get_brightness(bl); + int ret; + + dsi->mode_flags &= ~MIPI_DSI_MODE_LPM; + + ret = mipi_dsi_dcs_set_display_brightness_large(dsi, brightness); + if (ret < 0) + return ret; + + dsi->mode_flags |= MIPI_DSI_MODE_LPM; + + return 0; +} + +static int rm69380_bl_get_brightness(struct backlight_device *bl) +{ + struct mipi_dsi_device *dsi = bl_get_data(bl); + u16 brightness; + int ret; + + dsi->mode_flags &= ~MIPI_DSI_MODE_LPM; + + ret = mipi_dsi_dcs_get_display_brightness_large(dsi, &brightness); + if (ret < 0) + return ret; + + dsi->mode_flags |= MIPI_DSI_MODE_LPM; + + return brightness; +} + +static const struct backlight_ops rm69380_bl_ops = { + .update_status = rm69380_bl_update_status, + .get_brightness = rm69380_bl_get_brightness, +}; + +static struct backlight_device * +rm69380_create_backlight(struct mipi_dsi_device *dsi) +{ + struct device *dev = &dsi->dev; + const struct backlight_properties props = { + .type = BACKLIGHT_RAW, + .brightness = 2047, + .max_brightness = 2047, + }; + + return devm_backlight_device_register(dev, dev_name(dev), dev, dsi, + &rm69380_bl_ops, &props); +} + +static int rm69380_probe(struct mipi_dsi_device *dsi) +{ + struct mipi_dsi_host *dsi_sec_host; + struct rm69380_panel *ctx; + struct device *dev = &dsi->dev; + struct device_node *dsi_sec; + int ret, i; + + ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL); + if (!ctx) + return -ENOMEM; + + ctx->supplies[0].supply = "vddio"; + ctx->supplies[1].supply = "avdd"; + ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(ctx->supplies), + ctx->supplies); + if (ret < 0) + return dev_err_probe(dev, ret, "Failed to get regulators\n"); + + 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"); + + dsi_sec = of_graph_get_remote_node(dsi->dev.of_node, 1, -1); + + if (dsi_sec) { + const struct mipi_dsi_device_info info = { "RM69380", 0, + dsi_sec }; + + dev_dbg(dev, "Using Dual-DSI: found `%s`\n", dsi_sec->name); + + dsi_sec_host = of_find_mipi_dsi_host_by_node(dsi_sec); + of_node_put(dsi_sec); + if (!dsi_sec_host) + return dev_err_probe(dev, -EPROBE_DEFER, + "Cannot get secondary DSI host\n"); + + ctx->dsi[1] = + devm_mipi_dsi_device_register_full(dev, dsi_sec_host, &info); + if (IS_ERR(ctx->dsi[1])) + return dev_err_probe(dev, PTR_ERR(ctx->dsi[1]), + "Cannot get secondary DSI node\n"); + + dev_dbg(dev, "Second DSI name `%s`\n", ctx->dsi[1]->name); + mipi_dsi_set_drvdata(ctx->dsi[1], ctx); + } else { + dev_dbg(dev, "Using Single-DSI\n"); + } + + ctx->dsi[0] = dsi; + mipi_dsi_set_drvdata(dsi, ctx); + + drm_panel_init(&ctx->panel, dev, &rm69380_panel_funcs, + DRM_MODE_CONNECTOR_DSI); + ctx->panel.prepare_prev_first = true; + + ctx->panel.backlight = rm69380_create_backlight(dsi); + if (IS_ERR(ctx->panel.backlight)) + return dev_err_probe(dev, PTR_ERR(ctx->panel.backlight), + "Failed to create backlight\n"); + + drm_panel_add(&ctx->panel); + + for (i = 0; i < ARRAY_SIZE(ctx->dsi); i++) { + if (!ctx->dsi[i]) + continue; + + dev_dbg(&ctx->dsi[i]->dev, "Binding DSI %d\n", i); + + ctx->dsi[i]->lanes = 4; + ctx->dsi[i]->format = MIPI_DSI_FMT_RGB888; + ctx->dsi[i]->mode_flags = MIPI_DSI_MODE_VIDEO_BURST | + MIPI_DSI_CLOCK_NON_CONTINUOUS; + + ret = mipi_dsi_attach(ctx->dsi[i]); + if (ret < 0) { + mipi_dsi_detach(ctx->dsi[i]); + drm_panel_remove(&ctx->panel); + return dev_err_probe(dev, ret, + "Failed to attach to DSI%d\n", i); + } + } + + return 0; +} + +static void rm69380_remove(struct mipi_dsi_device *dsi) +{ + struct rm69380_panel *ctx = mipi_dsi_get_drvdata(dsi); + int i; + int ret; + + for (i = 0; i < ARRAY_SIZE(ctx->dsi); i++) { + if (!ctx->dsi[i]) + continue; + + ret = mipi_dsi_detach(ctx->dsi[i]); + if (ret < 0) + dev_err(&dsi->dev, "Failed to detach from DSI%d host: %d\n", i, ret); + } + + drm_panel_remove(&ctx->panel); +} + +static const struct of_device_id rm69380_of_match[] = { + { .compatible = "lenovo,j716f-edo-rm69380" }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, rm69380_of_match); + +static struct mipi_dsi_driver rm69380_panel_driver = { + .probe = rm69380_probe, + .remove = rm69380_remove, + .driver = { + .name = "panel-raydium-rm69380", + .of_match_table = rm69380_of_match, + }, +}; +module_mipi_dsi_driver(rm69380_panel_driver); + +MODULE_AUTHOR("David Wronek <david@mainlining.org"); +MODULE_DESCRIPTION("DRM driver for Raydium RM69380-equipped DSI panels"); +MODULE_LICENSE("GPL");
Add support for the 2560x1600@90Hz OLED panel by EDO bundled with a Raydium RM69380 controller, as found on the Lenovo Xiaoxin Pad Pro 2021. Signed-off-by: David Wronek <david@mainlining.org> --- drivers/gpu/drm/panel/Kconfig | 14 + drivers/gpu/drm/panel/Makefile | 1 + drivers/gpu/drm/panel/panel-raydium-rm69380.c | 367 ++++++++++++++++++++++++++ 3 files changed, 382 insertions(+)