diff options
| author | Jouni Högander <jouni.hogander@intel.com> | 2025-08-21 07:59:17 +0300 |
|---|---|---|
| committer | Jouni Högander <jouni.hogander@intel.com> | 2025-08-25 09:12:46 +0300 |
| commit | 9cc10041e9fe7f32c4817e3cdd806ff1986d266c (patch) | |
| tree | 793049b39e4df353f0c2ba6dca7006fcc0fc77fe | |
| parent | 2dbb3d70af6003dbf3c248cc01e36d7df142543a (diff) | |
drm/i915/psr: Check drm_dp_dpcd_read return value on PSR dpcd init
Currently we are ignoriong drm_dp_dpcd_read return values when reading PSR
and Panel Replay capability DPCD register. Rework intel_psr_dpcd a bit to
take care of checking the return value.
v2: use drm_dp_dpcd_read_data
Signed-off-by: Jouni Högander <jouni.hogander@intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Link: https://lore.kernel.org/r/20250821045918.17757-1-jouni.hogander@intel.com
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_psr.c | 32 |
1 files changed, 21 insertions, 11 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_psr.c b/drivers/gpu/drm/i915/display/intel_psr.c index 465f12c39330..eec4f7dc2d66 100644 --- a/drivers/gpu/drm/i915/display/intel_psr.c +++ b/drivers/gpu/drm/i915/display/intel_psr.c @@ -580,6 +580,16 @@ exit: static void _panel_replay_init_dpcd(struct intel_dp *intel_dp) { struct intel_display *display = to_intel_display(intel_dp); + int ret; + + ret = drm_dp_dpcd_read_data(&intel_dp->aux, DP_PANEL_REPLAY_CAP_SUPPORT, + &intel_dp->pr_dpcd, sizeof(intel_dp->pr_dpcd)); + if (ret < 0) + return; + + if (!(intel_dp->pr_dpcd[INTEL_PR_DPCD_INDEX(DP_PANEL_REPLAY_CAP_SUPPORT)] & + DP_PANEL_REPLAY_SUPPORT)) + return; if (intel_dp_is_edp(intel_dp)) { if (!intel_alpm_aux_less_wake_supported(intel_dp)) { @@ -611,6 +621,15 @@ static void _panel_replay_init_dpcd(struct intel_dp *intel_dp) static void _psr_init_dpcd(struct intel_dp *intel_dp) { struct intel_display *display = to_intel_display(intel_dp); + int ret; + + ret = drm_dp_dpcd_read_data(&intel_dp->aux, DP_PSR_SUPPORT, intel_dp->psr_dpcd, + sizeof(intel_dp->psr_dpcd)); + if (ret < 0) + return; + + if (!intel_dp->psr_dpcd[0]) + return; drm_dbg_kms(display->drm, "eDP panel supports PSR version %x\n", intel_dp->psr_dpcd[0]); @@ -656,18 +675,9 @@ static void _psr_init_dpcd(struct intel_dp *intel_dp) void intel_psr_init_dpcd(struct intel_dp *intel_dp) { - drm_dp_dpcd_read(&intel_dp->aux, DP_PSR_SUPPORT, intel_dp->psr_dpcd, - sizeof(intel_dp->psr_dpcd)); - - drm_dp_dpcd_read(&intel_dp->aux, DP_PANEL_REPLAY_CAP_SUPPORT, - &intel_dp->pr_dpcd, sizeof(intel_dp->pr_dpcd)); - - if (intel_dp->pr_dpcd[INTEL_PR_DPCD_INDEX(DP_PANEL_REPLAY_CAP_SUPPORT)] & - DP_PANEL_REPLAY_SUPPORT) - _panel_replay_init_dpcd(intel_dp); + _psr_init_dpcd(intel_dp); - if (intel_dp->psr_dpcd[0]) - _psr_init_dpcd(intel_dp); + _panel_replay_init_dpcd(intel_dp); if (intel_dp->psr.sink_psr2_support || intel_dp->psr.sink_panel_replay_su_support) |