2021-07-22 02:47:59

by Bjorn Andersson

Subject: [PATCH] drm/msm/dp: Initialize the INTF_CONFIG register

Some bootloaders set the widebus enable bit in the INTF_CONFIG register,
but configuration of widebus isn't yet supported ensure that the
register has a known value, with widebus disabled.

Fixes: c943b4948b58 ("drm/msm/dp: add displayPort driver support")
Signed-off-by: Bjorn Andersson <[email protected]>
---
drivers/gpu/drm/msm/dp/dp_catalog.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/msm/dp/dp_catalog.c b/drivers/gpu/drm/msm/dp/dp_catalog.c
index 23458b0ddc37..37cb1102a0ca 100644
--- a/drivers/gpu/drm/msm/dp/dp_catalog.c
+++ b/drivers/gpu/drm/msm/dp/dp_catalog.c
@@ -747,6 +747,7 @@ int dp_catalog_panel_timing_cfg(struct dp_catalog *dp_catalog)
dp_write_link(catalog, REG_DP_HSYNC_VSYNC_WIDTH_POLARITY,
dp_catalog->width_blanking);
dp_write_link(catalog, REG_DP_ACTIVE_HOR_VER, dp_catalog->dp_active);
+ dp_write_p0(catalog, MMSS_DP_INTF_CONFIG, 0);
return 0;
}

--
2.29.2

2021-07-22 20:20:39

by Stephen Boyd

Subject: Re: [PATCH] drm/msm/dp: Initialize the INTF_CONFIG register

Quoting Bjorn Andersson (2021-07-21 19:44:34)
> Some bootloaders set the widebus enable bit in the INTF_CONFIG register,
> but configuration of widebus isn't yet supported ensure that the
> register has a known value, with widebus disabled.
>
> Fixes: c943b4948b58 ("drm/msm/dp: add displayPort driver support")
> Signed-off-by: Bjorn Andersson <[email protected]>
> ---

Reviewed-by: Stephen Boyd <[email protected]>