Commit 7948fe12 authored by Kuogee Hsieh's avatar Kuogee Hsieh Committed by Rob Clark
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drm/msm/dp: return correct edid checksum after corrupted edid checksum read 



Response with correct edid checksum saved at connector after corrupted edid
checksum read. This fixes Link Layer CTS cases 4.2.2.3, 4.2.2.6.

Signed-off-by: default avatarKuogee Hsieh <khsieh@codeaurora.org>
Reviewed-by: default avatarStephen Boyd <swboyd@chromium.org>
Link: https://lore.kernel.org/r/1628196295-7382-6-git-send-email-khsieh@codeaurora.org


Signed-off-by: default avatarRob Clark <robdclark@chromium.org>
parent 7e10bf42

drivers/gpu/drm/msm/dp/dp_panel.c

+7 −2
Original line number Diff line number Diff line
@@ -271,7 +271,7 @@ static u8 dp_panel_get_edid_checksum(struct edid *edid) 
{

	struct edid *last_block;

	u8 *raw_edid;

	bool is_edid_corrupt;

	bool is_edid_corrupt = false;



	if (!edid) {

		DRM_ERROR("invalid edid input\n");
@@ -303,7 +303,12 @@ void dp_panel_handle_sink_request(struct dp_panel *dp_panel) 
	panel = container_of(dp_panel, struct dp_panel_private, dp_panel);



	if (panel->link->sink_request & DP_TEST_LINK_EDID_READ) {

		u8 checksum = dp_panel_get_edid_checksum(dp_panel->edid);

		u8 checksum;



		if (dp_panel->edid)

			checksum = dp_panel_get_edid_checksum(dp_panel->edid);

		else

			checksum = dp_panel->connector->real_edid_checksum;



		dp_link_send_edid_checksum(panel->link, checksum);

		dp_link_send_test_response(panel->link);