On 2021-07-22 12:23, Stephen Boyd wrote:
Quoting Kuogee Hsieh (2021-07-13 08:54:05)
diff --git a/drivers/gpu/drm/msm/dp/dp_panel.c
b/drivers/gpu/drm/msm/dp/dp_panel.c
index 88196f7..0fdb551 100644
--- a/drivers/gpu/drm/msm/dp/dp_panel.c
+++ b/drivers/gpu/drm/msm/dp/dp_panel.c
@@ -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;
Is there any reason why we can't use connector->real_edid_checksum all
the time?
real_edid_checksum only calculated by drm when edid checksum
vitrification failed after edid read.
In the good edid checksum case (edid verification succeed),
real_edid_checksum is not calculated by drm.
dp_link_send_edid_checksum(panel->link, checksum);
dp_link_send_test_response(panel->link);
