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| author | Jouni Högander <jouni.hogander@intel.com> | 2026-05-15 12:57:54 +0300 |
|---|---|---|
| committer | Jouni Högander <jouni.hogander@intel.com> | 2026-05-18 09:06:39 +0300 |
| commit | c48ff24d0f4ab7ad696b2d35ad64ce7e049c668c (patch) | |
| tree | ec8862078d3824b575d287ec4f4b627a3b198c96 | |
| parent | 1da1c9294825f08f622c473480d185680c2a3b75 (diff) | |
| download | linux-c48ff24d0f4ab7ad696b2d35ad64ce7e049c668c.tar.gz linux-c48ff24d0f4ab7ad696b2d35ad64ce7e049c668c.zip | |
drm/i915/psr: Read Intel DPCD workaround register
Read Intel DPCD workaround register and store it into
intel_connector->dp.psr_caps. psr_caps was chosen as currently it contains
only PSR workaround for PSR2 SDP on prior scanline implementation.
Signed-off-by: Jouni Högander <jouni.hogander@intel.com>
Reviewed-by: Suraj Kandpal <suraj.kandpal@intel.com>
Link: https://patch.msgid.link/20260515095756.2799483-3-jouni.hogander@intel.com
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_display_types.h | 1 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_psr.c | 9 |
2 files changed, 9 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h index b7bcf8fefa3e..f44be5c689ae 100644 --- a/drivers/gpu/drm/i915/display/intel_display_types.h +++ b/drivers/gpu/drm/i915/display/intel_display_types.h @@ -584,6 +584,7 @@ struct intel_connector { struct { u8 dpcd[EDP_PSR_RECEIVER_CAP_SIZE]; + u8 intel_wa_dpcd; bool support; bool su_support; diff --git a/drivers/gpu/drm/i915/display/intel_psr.c b/drivers/gpu/drm/i915/display/intel_psr.c index 892d209dce1b..03a2377c315c 100644 --- a/drivers/gpu/drm/i915/display/intel_psr.c +++ b/drivers/gpu/drm/i915/display/intel_psr.c @@ -44,6 +44,7 @@ #include "intel_display_wa.h" #include "intel_dmc.h" #include "intel_dp.h" +#include "intel_dpcd.h" #include "intel_dp_aux.h" #include "intel_dp_tunnel.h" #include "intel_dsb.h" @@ -720,8 +721,14 @@ static void _psr_init_dpcd(struct intel_dp *intel_dp, struct intel_connector *co connector->dp.psr_caps.su_support ? "" : "not "); } - if (connector->dp.psr_caps.su_support) + if (connector->dp.psr_caps.su_support) { + ret = drm_dp_dpcd_read_byte(&intel_dp->aux, + INTEL_DPCD_INTEL_WA_REGISTER_CAPS, + &connector->dp.psr_caps.intel_wa_dpcd); + if (ret < 0) + return; _psr_compute_su_granularity(intel_dp, connector); + } } void intel_psr_init_dpcd(struct intel_dp *intel_dp, struct intel_connector *connector) |