diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_bios.h | 1 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c | 5 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/i915_params.c | 5 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/i915_params.h | 2 |
4 files changed, 9 insertions, 4 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_bios.h b/drivers/gpu/drm/i915/display/intel_bios.h index 4e42cfaf61a7..0b7be6389a07 100644 --- a/drivers/gpu/drm/i915/display/intel_bios.h +++ b/drivers/gpu/drm/i915/display/intel_bios.h @@ -42,6 +42,7 @@ enum intel_backlight_type { INTEL_BACKLIGHT_DISPLAY_DDI, INTEL_BACKLIGHT_DSI_DCS, INTEL_BACKLIGHT_PANEL_DRIVER_INTERFACE, + INTEL_BACKLIGHT_VESA_EDP_AUX_INTERFACE, }; struct edp_power_seq { 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 7ded95a334db..6b0b73479fb8 100644 --- a/drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c +++ b/drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c @@ -264,8 +264,11 @@ intel_dp_aux_display_control_capable(struct intel_connector *connector) int intel_dp_aux_init_backlight_funcs(struct intel_connector *intel_connector) { struct intel_panel *panel = &intel_connector->panel; + struct drm_i915_private *dev_priv = to_i915(intel_connector->base.dev); - if (!i915_modparams.enable_dpcd_backlight) + if (i915_modparams.enable_dpcd_backlight == 0 || + (i915_modparams.enable_dpcd_backlight == -1 && + dev_priv->vbt.backlight.type != INTEL_BACKLIGHT_VESA_EDP_AUX_INTERFACE)) return -ENODEV; if (!intel_dp_aux_display_control_capable(intel_connector)) diff --git a/drivers/gpu/drm/i915/i915_params.c b/drivers/gpu/drm/i915/i915_params.c index 5b07766a1c26..296452f9efe4 100644 --- a/drivers/gpu/drm/i915/i915_params.c +++ b/drivers/gpu/drm/i915/i915_params.c @@ -169,8 +169,9 @@ i915_param_named_unsafe(inject_load_failure, uint, 0400, "Force an error after a number of failure check points (0:disabled (default), N:force failure at the Nth failure check point)"); #endif -i915_param_named(enable_dpcd_backlight, bool, 0600, - "Enable support for DPCD backlight control (default:false)"); +i915_param_named(enable_dpcd_backlight, int, 0600, + "Enable support for DPCD backlight control" + "(-1=use per-VBT LFP backlight type setting, 0=disabled [default], 1=enabled)"); #if IS_ENABLED(CONFIG_DRM_I915_GVT) i915_param_named(enable_gvt, bool, 0400, diff --git a/drivers/gpu/drm/i915/i915_params.h b/drivers/gpu/drm/i915/i915_params.h index a4770ce46bd2..d29ade3b7de6 100644 --- a/drivers/gpu/drm/i915/i915_params.h +++ b/drivers/gpu/drm/i915/i915_params.h @@ -64,6 +64,7 @@ struct drm_printer; param(int, reset, 2) \ param(unsigned int, inject_load_failure, 0) \ param(int, fastboot, -1) \ + param(int, enable_dpcd_backlight, 0) \ param(char *, force_probe, CONFIG_DRM_I915_FORCE_PROBE) \ /* leave bools at the end to not create holes */ \ param(bool, alpha_support, IS_ENABLED(CONFIG_DRM_I915_ALPHA_SUPPORT)) \ @@ -76,7 +77,6 @@ struct drm_printer; param(bool, verbose_state_checks, true) \ param(bool, nuclear_pageflip, false) \ param(bool, enable_dp_mst, true) \ - param(bool, enable_dpcd_backlight, false) \ param(bool, enable_gvt, false) #define MEMBER(T, member, ...) T member; |