Re: [PATCH] Revert "drm/bridge: lt9611: Do not generate HFP/HBP/HSA and EOT packet"

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On 8/2/23 15:38, Dmitry Baryshkov wrote:
On 02/08/2023 11:52, Neil Armstrong wrote:
This reverts commit [1] to fix display regression on the Dragonboard 845c
(SDM845) devboard.

There's a mismatch on the real action of the following flags:
- MIPI_DSI_MODE_VIDEO_NO_HSA
- MIPI_DSI_MODE_VIDEO_NO_HFP
- MIPI_DSI_MODE_VIDEO_NO_HBP
which leads to a non-working display on qcom platforms.

[1] 8ddce13ae696 ("drm/bridge: lt9611: Do not generate HFP/HBP/HSA and EOT packet")

Cc: Marek Vasut <marex@xxxxxxx>
Cc: Robert Foss <rfoss@xxxxxxxxxx>
Cc: Jagan Teki <jagan@xxxxxxxxxxxxxxxxxxxx>
Cc: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
Cc: Abhinav Kumar <quic_abhinavk@xxxxxxxxxxx>
Fixes: 8ddce13ae69 ("drm/bridge: lt9611: Do not generate HFP/HBP/HSA and EOT packet")
Reported-by: Amit Pundir <amit.pundir@xxxxxxxxxx>
Link: https://lore.kernel.org/r/CAMi1Hd0TD=2z_=bcDrht3H_wiLvAFcv8Z-U_r_KUOoeMc6UMjw@xxxxxxxxxxxxxx/
Signed-off-by: Neil Armstrong <neil.armstrong@xxxxxxxxxx>
---
  drivers/gpu/drm/bridge/lontium-lt9611.c | 4 +---
  1 file changed, 1 insertion(+), 3 deletions(-)

Acked-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx> #fix db845c

The boards broken by [1] are used in production by different parties since 5.10, breaking them doesn't seem more acceptable than breaking the new out-of-tree iMX8m hardware.

The MX8M is also in-tree, so this does not apply.



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