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| author | Kuogee Hsieh <khsieh@codeaurora.org> | 2021-08-05 13:44:54 -0700 |
|---|---|---|
| committer | Rob Clark <robdclark@chromium.org> | 2021-08-10 14:49:29 -0700 |
| commit | 7948fe12d47a946fb8025a0534c900e3dd4b5839 (patch) | |
| tree | c243938e92da0ab24a5e39a2b04b3a5b53324571 | |
| parent | 7e10bf427850f2d7133fd091999abd5fc1755cdb (diff) | |
| download | linux-7948fe12d47a946fb8025a0534c900e3dd4b5839.tar.gz linux-7948fe12d47a946fb8025a0534c900e3dd4b5839.tar.bz2 linux-7948fe12d47a946fb8025a0534c900e3dd4b5839.zip | |
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: Kuogee Hsieh <khsieh@codeaurora.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Link: https://lore.kernel.org/r/1628196295-7382-6-git-send-email-khsieh@codeaurora.org
Signed-off-by: Rob Clark <robdclark@chromium.org>
| -rw-r--r-- | drivers/gpu/drm/msm/dp/dp_panel.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/drivers/gpu/drm/msm/dp/dp_panel.c b/drivers/gpu/drm/msm/dp/dp_panel.c index 440b32753430..2181b60e1d1d 100644 --- a/drivers/gpu/drm/msm/dp/dp_panel.c +++ b/drivers/gpu/drm/msm/dp/dp_panel.c @@ -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); |