diff options
Diffstat (limited to 'drivers/gpu/drm/panel/panel-visionox-rm69299.c')
| -rw-r--r-- | drivers/gpu/drm/panel/panel-visionox-rm69299.c | 71 |
1 files changed, 69 insertions, 2 deletions
diff --git a/drivers/gpu/drm/panel/panel-visionox-rm69299.c b/drivers/gpu/drm/panel/panel-visionox-rm69299.c index 909c280eab1f..e5e688cf98fd 100644 --- a/drivers/gpu/drm/panel/panel-visionox-rm69299.c +++ b/drivers/gpu/drm/panel/panel-visionox-rm69299.c @@ -3,6 +3,7 @@ * Copyright (c) 2019, The Linux Foundation. All rights reserved. */ +#include <linux/backlight.h> #include <linux/delay.h> #include <linux/module.h> #include <linux/property.h> @@ -20,6 +21,8 @@ struct visionox_rm69299_panel_desc { const struct drm_display_mode *mode; const u8 *init_seq; unsigned int init_seq_len; + int max_brightness; + int initial_brightness; }; struct visionox_rm69299 { @@ -192,7 +195,7 @@ static int visionox_rm69299_unprepare(struct drm_panel *panel) struct visionox_rm69299 *ctx = panel_to_ctx(panel); struct mipi_dsi_multi_context dsi_ctx = { .dsi = ctx->dsi }; - ctx->dsi->mode_flags = 0; + ctx->dsi->mode_flags &= ~MIPI_DSI_MODE_LPM; mipi_dsi_dcs_set_display_off_multi(&dsi_ctx); @@ -247,7 +250,7 @@ static const struct drm_display_mode visionox_rm69299_1080x2248_60hz = { }; static const struct drm_display_mode visionox_rm69299_1080x2160_60hz = { - .clock = 158695, + .clock = (2160 + 8 + 4 + 4) * (1080 + 26 + 2 + 36) * 60 / 1000, .hdisplay = 1080, .hsync_start = 1080 + 26, .hsync_end = 1080 + 26 + 2, @@ -285,6 +288,63 @@ static const struct drm_panel_funcs visionox_rm69299_drm_funcs = { .get_modes = visionox_rm69299_get_modes, }; +static int visionox_rm69299_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(dsi, &brightness); + if (ret < 0) + return ret; + + dsi->mode_flags |= MIPI_DSI_MODE_LPM; + + return brightness; +} + +static int visionox_rm69299_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(dsi, brightness); + if (ret < 0) + return ret; + + dsi->mode_flags |= MIPI_DSI_MODE_LPM; + + return 0; +} + +static const struct backlight_ops visionox_rm69299_bl_ops = { + .update_status = visionox_rm69299_bl_update_status, + .get_brightness = visionox_rm69299_bl_get_brightness, +}; + +static struct backlight_device * +visionox_rm69299_create_backlight(struct visionox_rm69299 *ctx) +{ + struct device *dev = &ctx->dsi->dev; + const struct backlight_properties props = { + .type = BACKLIGHT_RAW, + .brightness = ctx->desc->initial_brightness, + .max_brightness = ctx->desc->max_brightness, + }; + + if (!ctx->desc->max_brightness) + return 0; + + return devm_backlight_device_register(dev, dev_name(dev), dev, ctx->dsi, + &visionox_rm69299_bl_ops, + &props); +} + static int visionox_rm69299_probe(struct mipi_dsi_device *dsi) { struct device *dev = &dsi->dev; @@ -316,6 +376,11 @@ static int visionox_rm69299_probe(struct mipi_dsi_device *dsi) return PTR_ERR(ctx->reset_gpio); } + ctx->panel.backlight = visionox_rm69299_create_backlight(ctx); + 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); dsi->lanes = 4; @@ -353,6 +418,8 @@ const struct visionox_rm69299_panel_desc visionox_rm69299_shift_desc = { .mode = &visionox_rm69299_1080x2160_60hz, .init_seq = (const u8 *)visionox_rm69299_1080x2160_60hz_init_seq, .init_seq_len = ARRAY_SIZE(visionox_rm69299_1080x2160_60hz_init_seq), + .max_brightness = 255, + .initial_brightness = 50, }; static const struct of_device_id visionox_rm69299_of_match[] = { |