Commit f30bece4 authored by Jouni Högander's avatar Jouni Högander Committed by Tvrtko Ursulin
Browse files

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: default avatarJouni Högander <jouni.hogander@intel.com>
Reviewed-by: default avatarSuraj Kandpal <suraj.kandpal@intel.com>
Link: https://patch.msgid.link/20260515095756.2799483-3-jouni.hogander@intel.com


(cherry picked from commit c48ff24d0f4ab7ad696b2d35ad64ce7e049c668c)
Signed-off-by: default avatarTvrtko Ursulin <tursulin@ursulin.net>
parent fbceb39b

drivers/gpu/drm/i915/display/intel_display_types.h

+1 −0
Original line number Diff line number Diff line
@@ -584,6 +584,7 @@ struct intel_connector { 


		struct {

			u8 dpcd[EDP_PSR_RECEIVER_CAP_SIZE];

			u8 intel_wa_dpcd;



			bool support;

			bool su_support;

drivers/gpu/drm/i915/display/intel_psr.c

+8 −1
Original line number Diff line number Diff line
@@ -43,6 +43,7 @@ 
#include "intel_display_wa.h"

#include "intel_dmc.h"

#include "intel_dp.h"

#include "intel_dpcd.h"

#include "intel_dp_aux.h"

#include "intel_dsb.h"

#include "intel_frontbuffer.h"
@@ -716,9 +717,15 @@ 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)

{