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drm/dp: Add argument for max luminance in drm_edp_backlight_init

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Add new argument to drm_edp_backlight_init which gives the
max_luminance which will be needed to set the max values for
backlight.

--v2
-Use pass only max luminance instead of luminance_range_info struct
[Arun]

Signed-off-by: Suraj Kandpal <suraj.kandpal@intel.com>
Reviewed-by: Arun R Murthy <arun.r.murthy@intel.com>
Link: https://lore.kernel.org/r/20250620063445.3603086-4-suraj.kandpal@intel.com
This commit is contained in:
Suraj Kandpal
2025-06-20 12:04:35 +05:30
parent c802a6b81b
commit 81fd01414f
4 changed files with 10 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/gpu/drm/display/drm_dp_helper.c
View File

@@ -4235,6 +4235,7 @@ drm_edp_backlight_probe_state(struct drm_dp_aux *aux, struct drm_edp_backlight_i
* interface.
* @aux: The DP aux device to use for probing
* @bl: The &drm_edp_backlight_info struct to fill out with information on the backlight
* @max_luminance: max luminance when need luminance is set as true
* @driver_pwm_freq_hz: Optional PWM frequency from the driver in hz
* @edp_dpcd: A cached copy of the eDP DPCD
* @current_level: Where to store the probed brightness level, if any
@@ -4251,6 +4252,7 @@ drm_edp_backlight_probe_state(struct drm_dp_aux *aux, struct drm_edp_backlight_i
*/
int
drm_edp_backlight_init(struct drm_dp_aux *aux, struct drm_edp_backlight_info *bl,
u32 max_luminance,
u16 driver_pwm_freq_hz, const u8 edp_dpcd[EDP_DISPLAY_CTL_CAP_SIZE],
u16 *current_level, u8 *current_mode, bool need_luminance)
{
@@ -4380,7 +4382,7 @@ int drm_panel_dp_aux_backlight(struct drm_panel *panel, struct drm_dp_aux *aux)
bl->aux = aux;
ret = drm_edp_backlight_init(aux, &bl->info, 0, edp_dpcd,
ret = drm_edp_backlight_init(aux, &bl->info, 0, 0, edp_dpcd,
&current_level, &current_mode, false);
if (ret < 0)
return ret;

6
drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c
View File

@@ -599,8 +599,10 @@ static int intel_dp_aux_vesa_setup_backlight(struct intel_connector *connector,
connector->base.base.id, connector->base.name);
} else {
ret = drm_edp_backlight_init(&intel_dp->aux, &panel->backlight.edp.vesa.info,
panel->vbt.backlight.pwm_freq_hz, intel_dp->edp_dpcd,
&current_level, &current_mode, false);
luminance_range->max_luminance,
panel->vbt.backlight.pwm_freq_hz,
intel_dp->edp_dpcd, &current_level, &current_mode,
false);
if (ret < 0)
return ret;

3
drivers/gpu/drm/nouveau/nouveau_backlight.c
View File

@@ -261,7 +261,8 @@ nv50_backlight_init(struct nouveau_backlight *bl,
NV_DEBUG(drm, "DPCD backlight controls supported on %s\n",
nv_conn->base.name);
ret = drm_edp_backlight_init(&nv_conn->aux, &bl->edp_info, 0, edp_dpcd,
ret = drm_edp_backlight_init(&nv_conn->aux, &bl->edp_info,
0, 0, edp_dpcd,
&current_level, &current_mode, false);
if (ret < 0)
return ret;

1
include/drm/display/drm_dp_helper.h
View File

@@ -854,6 +854,7 @@ struct drm_edp_backlight_info {
int
drm_edp_backlight_init(struct drm_dp_aux *aux, struct drm_edp_backlight_info *bl,
u32 max_luminance,
u16 driver_pwm_freq_hz, const u8 edp_dpcd[EDP_DISPLAY_CTL_CAP_SIZE],
u16 *current_level, u8 *current_mode, bool need_luminance);
int drm_edp_backlight_set_level(struct drm_dp_aux *aux, const struct drm_edp_backlight_info *bl,