diff options
| author | Suraj Kandpal <suraj.kandpal@intel.com> | 2025-02-06 12:02:53 +0530 |
|---|---|---|
| committer | Suraj Kandpal <suraj.kandpal@intel.com> | 2025-02-06 22:14:43 +0530 |
| commit | a5efc8dcfe710fd63a0557d3512e8ff753c2e283 (patch) | |
| tree | 04536624741afd8c72f182a14538256e0c8de6d0 | |
| parent | drm/i915/backlight: Setup nits based luminance via VESA (diff) | |
| download | linux-a5efc8dcfe710fd63a0557d3512e8ff753c2e283.tar.gz linux-a5efc8dcfe710fd63a0557d3512e8ff753c2e283.zip | |
drm/i915/backlight: Enable nits based luminance
Enable nits based luminance by writing the PANEL_LUMINANCE_CONTROL
bit and set the correct register to change brightness.
Signed-off-by: Suraj Kandpal <suraj.kandpal@intel.com>
Tested-by: Ben Kao <ben.kao@intel.com>
Reviewed-by: Arun R Murthy <arun.r.murthy@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250206063253.2827017-9-suraj.kandpal@intel.com
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c b/drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c index 301a4dfdfbe5..f53c8355d5be 100644 --- a/drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c +++ b/drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c @@ -527,6 +527,18 @@ intel_dp_aux_vesa_enable_backlight(const struct intel_crtc_state *crtc_state, struct intel_connector *connector = to_intel_connector(conn_state->connector); struct intel_panel *panel = &connector->panel; struct intel_dp *intel_dp = enc_to_intel_dp(connector->encoder); + int ret; + + if (panel->backlight.edp.vesa.luminance_control_support) { + ret = drm_dp_dpcd_writeb(&intel_dp->aux, DP_EDP_BACKLIGHT_MODE_SET_REGISTER, + DP_EDP_PANEL_LUMINANCE_CONTROL_ENABLE); + + if (ret == 1) + return; + + if (!intel_dp_aux_vesa_set_luminance(connector, level)) + return; + } if (!panel->backlight.edp.vesa.info.aux_enable) { u32 pwm_level; @@ -550,6 +562,9 @@ static void intel_dp_aux_vesa_disable_backlight(const struct drm_connector_state struct intel_panel *panel = &connector->panel; struct intel_dp *intel_dp = enc_to_intel_dp(connector->encoder); + if (panel->backlight.edp.vesa.luminance_control_support) + return; + drm_edp_backlight_disable(&intel_dp->aux, &panel->backlight.edp.vesa.info); if (!panel->backlight.edp.vesa.info.aux_enable) |