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drm/panel: simple: Add support for dcs backlight

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Signed-off-by: Guochun Huang <hero.huang@rock-chips.com>
Change-Id: Id9380a16c1db606f30032259a3bbba0884731c97
This commit is contained in:
Guochun Huang
2021-12-15 02:40:54 +00:00
committed by Tao Huang
parent aba99662aa
commit b8571e2321
1 changed files with 66 additions and 0 deletions
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66
drivers/gpu/drm/panel/panel-simple.c
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@@ -728,6 +728,52 @@ static void panel_simple_parse_panel_timing_node(struct device *dev,
dev_err(dev, "Reject override mode: No display_timing found\n");
}
static int dcs_bl_update_status(struct backlight_device *bl)
{
struct panel_simple *p = bl_get_data(bl);
struct mipi_dsi_device *dsi = p->dsi;
int ret;
if (!p->prepared)
return 0;
dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
ret = mipi_dsi_dcs_set_display_brightness(dsi, bl->props.brightness);
if (ret < 0)
return ret;
dsi->mode_flags |= MIPI_DSI_MODE_LPM;
return 0;
}
static int dcs_bl_get_brightness(struct backlight_device *bl)
{
struct panel_simple *p = bl_get_data(bl);
struct mipi_dsi_device *dsi = p->dsi;
u16 brightness = bl->props.brightness;
int ret;
if (!p->prepared)
return 0;
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 & 0xff;
}
static const struct backlight_ops dcs_bl_ops = {
.update_status = dcs_bl_update_status,
.get_brightness = dcs_bl_get_brightness,
};
static int panel_simple_probe(struct device *dev, const struct panel_desc *desc)
{
struct panel_simple *panel;
@@ -4994,6 +5040,26 @@ static int panel_simple_dsi_probe(struct mipi_dsi_device *dsi)
panel = dev_get_drvdata(dev);
panel->dsi = dsi;
if (!panel->base.backlight) {
struct backlight_properties props;
memset(&props, 0, sizeof(props));
props.type = BACKLIGHT_RAW;
props.brightness = 255;
props.max_brightness = 255;
panel->base.backlight =
devm_backlight_device_register(dev, "dcs-backlight",
dev, panel, &dcs_bl_ops,
&props);
if (IS_ERR(panel->base.backlight)) {
err = PTR_ERR(panel->base.backlight);
dev_err(dev, "failed to register dcs backlight: %d\n",
err);
return err;
}
}
dsi->mode_flags = desc->flags;
dsi->format = desc->format;
dsi->lanes = desc->lanes;