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drm/i915/dp: split up panel power control from backlight pwm control 

Make it possible to change panel power control backlight state without
touching the PWM. No functional changes.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed_by: Clinton Taylor <Clinton.A.Taylor@intel.com>
Tested_by: Clinton Taylor <Clinton.A.Taylor@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Jani Nikula 2014-08-12 17:11:39 +03:00 committed by Daniel Vetter
parent 9dd3c605a3
commit 1250d107cf
1 changed files with 26 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

39
drivers/gpu/drm/i915/intel_dp.c
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@ -1384,7 +1384,8 @@ void intel_edp_panel_off(struct intel_dp *intel_dp)
intel_display_power_put(dev_priv, power_domain);
}
void intel_edp_backlight_on(struct intel_dp *intel_dp)
/* Enable backlight in the panel power control. */
static void _intel_edp_backlight_on(struct intel_dp *intel_dp)
{
struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
struct drm_device *dev = intel_dig_port->base.base.dev;
@ -1392,13 +1393,6 @@ void intel_edp_backlight_on(struct intel_dp *intel_dp)
u32 pp;
u32 pp_ctrl_reg;
if (!is_edp(intel_dp))
return;
DRM_DEBUG_KMS("\n");
intel_panel_enable_backlight(intel_dp->attached_connector);
/*
* If we enable the backlight right away following a panel power
* on, we may see slight flicker as the panel syncs with the eDP
@ -1415,17 +1409,26 @@ void intel_edp_backlight_on(struct intel_dp *intel_dp)
POSTING_READ(pp_ctrl_reg);
}
void intel_edp_backlight_off(struct intel_dp *intel_dp)
/* Enable backlight PWM and backlight PP control. */
void intel_edp_backlight_on(struct intel_dp *intel_dp)
{
if (!is_edp(intel_dp))
return;
DRM_DEBUG_KMS("\n");
intel_panel_enable_backlight(intel_dp->attached_connector);
_intel_edp_backlight_on(intel_dp);
}
/* Disable backlight in the panel power control. */
static void _intel_edp_backlight_off(struct intel_dp *intel_dp)
{
struct drm_device *dev = intel_dp_to_dev(intel_dp);
struct drm_i915_private *dev_priv = dev->dev_private;
u32 pp;
u32 pp_ctrl_reg;
if (!is_edp(intel_dp))
return;
DRM_DEBUG_KMS("\n");
pp = ironlake_get_pp_control(intel_dp);
pp &= ~EDP_BLC_ENABLE;
@ -1436,7 +1439,17 @@ void intel_edp_backlight_off(struct intel_dp *intel_dp)
intel_dp->last_backlight_off = jiffies;
edp_wait_backlight_off(intel_dp);
}
/* Disable backlight PP control and backlight PWM. */
void intel_edp_backlight_off(struct intel_dp *intel_dp)
{
if (!is_edp(intel_dp))
return;
DRM_DEBUG_KMS("\n");
_intel_edp_backlight_off(intel_dp);
intel_panel_disable_backlight(intel_dp->attached_connector);
}