leandrof/linux
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

drm/i915/psr: Set DPCD PSR2 enable bit when needed

Browse Source 
In the 2 eDP1.4a pannels tested set or not set bit have no effect
but is better set it and comply with specification.

Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Cc: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180328223046.16125-9-jose.souza@intel.com
This commit is contained in:
José Roberto de Souza 2018-03-28 15:30:45 -07:00 committed by Rodrigo Vivi
parent 26e5378d11
commit 4df4925b1b
1 changed files with 6 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
drivers/gpu/drm/i915/intel_psr.c
View File

@ -278,18 +278,19 @@ static void hsw_psr_enable_sink(struct intel_dp *intel_dp)
struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
struct drm_device *dev = dig_port->base.base.dev;
struct drm_i915_private *dev_priv = to_i915(dev);
u8 dpcd_val = DP_PSR_ENABLE;
/* Enable ALPM at sink for psr2 */
if (dev_priv->psr.psr2_enabled && dev_priv->psr.alpm)
drm_dp_dpcd_writeb(&intel_dp->aux,
DP_RECEIVER_ALPM_CONFIG,
DP_ALPM_ENABLE);
if (dev_priv->psr.psr2_enabled)
dpcd_val |= DP_PSR_ENABLE_PSR2;
if (dev_priv->psr.link_standby)
drm_dp_dpcd_writeb(&intel_dp->aux, DP_PSR_EN_CFG,
DP_PSR_ENABLE | DP_PSR_MAIN_LINK_ACTIVE);
else
drm_dp_dpcd_writeb(&intel_dp->aux, DP_PSR_EN_CFG,
DP_PSR_ENABLE);
dpcd_val |= DP_PSR_MAIN_LINK_ACTIVE;
drm_dp_dpcd_writeb(&intel_dp->aux, DP_PSR_EN_CFG, dpcd_val);
drm_dp_dpcd_writeb(&intel_dp->aux, DP_SET_POWER, DP_SET_POWER_D0);
}