openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

drm/i915: Don't enable backlight at setup time. 

Maarten and Ville noticed that we are enabling backlight via DP aux very
early in the modeset_init path via the intel_dp_aux_setup_backlight()
function, since commit e7156c8339 ("drm/i915: Add Backlight Control using
DPCD for eDP connectors (v9)"). Looks like all we need to do during
_setup_backlight() is read the current brightness state instead of
modifying it.

v2: Rewrote commit message.

Cc: Ville Syrjala <ville.syrjala@linux.intel.com>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Jani Nikula <jani.nikula@intel.com>
Cc: Yetunde Adebisi <yetundex.adebisi@intel.com>
Signed-off-by: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Acked-by: Jani Nikula <jani.nikula@intel.com>
Tested-by: Puthikorn Voravootivat <puthik@chromium.org>
Fixes: e7156c8339 ("drm/i915: Add Backlight Control using DPCD for eDP connectors (v9)")
Link: http://patchwork.freedesktop.org/patch/msgid/1497384239-2965-1-git-send-email-dhinakaran.pandiyan@intel.com
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
This commit is contained in:
Dhinakaran Pandiyan 2017-06-13 13:03:59 -07:00 committed by Ville Syrjälä
parent 29962acaa0
commit f6262bda46
1 changed files with 0 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
drivers/gpu/drm/i915/intel_dp_aux_backlight.c
View File

@ -80,10 +80,6 @@ static uint32_t intel_dp_aux_get_backlight(struct intel_connector *connector)
static void
intel_dp_aux_set_backlight(const struct drm_connector_state *conn_state, u32 level)
{
/*
* conn_state->best_encoder is likely NULL when called from
* intel_dp_aux_setup_backlight()
*/
struct intel_connector *connector = to_intel_connector(conn_state->connector);
struct intel_dp *intel_dp = enc_to_intel_dp(&connector->encoder->base);
uint8_t vals[2] = { 0x0 };
@ -106,10 +102,6 @@ static void intel_dp_aux_enable_backlight(const struct intel_crtc_state *crtc_st
const struct drm_connector_state *conn_state)
{
struct intel_connector *connector = to_intel_connector(conn_state->connector);
/*
* conn_state->best_encoder (and crtc_state) are NULL when called from
* intel_dp_aux_setup_backlight()
*/
struct intel_dp *intel_dp = enc_to_intel_dp(&connector->encoder->base);
uint8_t dpcd_buf = 0;
uint8_t edp_backlight_mode = 0;
@ -156,8 +148,6 @@ static int intel_dp_aux_setup_backlight(struct intel_connector *connector,
struct intel_dp *intel_dp = enc_to_intel_dp(&connector->encoder->base);
struct intel_panel *panel = &connector->panel;
intel_dp_aux_enable_backlight(NULL, connector->base.state);
if (intel_dp->edp_dpcd[2] & DP_EDP_BACKLIGHT_BRIGHTNESS_BYTE_COUNT)
panel->backlight.max = 0xFFFF;
else