torvalds/linux
3
0
Fork 0
mirror of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2026-03-22 07:27:12 +08:00
Code Issues Packages Projects Releases Wiki Activity

drm/i915/dp: Read ALPM caps after DPCD init

Browse Source 
For eDP read the ALPM DPCD caps after DPCD initalization and just before
the PSR init.

v2: Move intel_alpm_init to intel_edp_init_dpcd (Jouni)
v3: Add Fixes with commit-id (Jouni)
v4: Separated the alpm dpcd read caps from alpm_init and moved to
intel_edp_init_dpcd.
v5: Read alpm_caps always for eDP irrespective of the eDP version (Jouni)
v6: replace drm_dp_dpcd_readb with drm_dp_dpcd_read_byte (Jouni)

Fixes: 15438b3259 ("drm/i915/alpm: Add compute config for lobf")
Signed-off-by: Arun R Murthy <arun.r.murthy@intel.com>
Reviewed-by: Animesh Manna <animesh.manna@intel.com>
Reviewed-by: Jouni Högander <jouni.hogander@intel.com>
Signed-off-by: Animesh Manna <animesh.manna@intel.com>
Link: https://patch.msgid.link/20260304072157.1123283-1-arun.r.murthy@intel.com
(cherry picked from commit 88442ba208dd5d3405de3f5000cf5b2c86876ae3)
Signed-off-by: Tvrtko Ursulin <tursulin@ursulin.net>
This commit is contained in:
Arun R Murthy
2026-03-04 12:51:57 +05:30
committed by Tvrtko Ursulin
parent 5923a6e045
commit 335b237d90
2 changed files with 7 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/gpu/drm/i915/display/intel_alpm.c
View File

@@ -43,12 +43,6 @@ bool intel_alpm_is_alpm_aux_less(struct intel_dp *intel_dp,
void intel_alpm_init(struct intel_dp *intel_dp)
{
u8 dpcd;
if (drm_dp_dpcd_readb(&intel_dp->aux, DP_RECEIVER_ALPM_CAP, &dpcd) < 0)
return;
intel_dp->alpm_dpcd = dpcd;
mutex_init(&intel_dp->alpm.lock);
}

7
drivers/gpu/drm/i915/display/intel_dp.c
View File

@@ -4577,6 +4577,7 @@ static bool
intel_edp_init_dpcd(struct intel_dp *intel_dp, struct intel_connector *connector)
{
struct intel_display *display = to_intel_display(intel_dp);
int ret;
/* this function is meant to be called only once */
drm_WARN_ON(display->drm, intel_dp->dpcd[DP_DPCD_REV] != 0);
@@ -4616,6 +4617,12 @@ intel_edp_init_dpcd(struct intel_dp *intel_dp, struct intel_connector *connector
*/
intel_dp_init_source_oui(intel_dp);
/* Read the ALPM DPCD caps */
ret = drm_dp_dpcd_read_byte(&intel_dp->aux, DP_RECEIVER_ALPM_CAP,
&intel_dp->alpm_dpcd);
if (ret < 0)
return false;
/*
* This has to be called after intel_dp->edp_dpcd is filled, PSR checks
* for SET_POWER_CAPABLE bit in intel_dp->edp_dpcd[1]