2018-08-23 05:58:08

by Kai-Heng Feng

Subject: [PATCH] drm/edid: Add 6 bpc quirk for SDC panel in Lenovo B50-80

Another panel that reports "DFP 1.x compliant TMDS" but it supports 6bpc
instead of 8 bpc.

Apply 6 bpc quirk for the panel to fix it.

BugLink: https://bugs.launchpad.net/bugs/1788308
Cc: <[email protected]> # v4.8+
Signed-off-by: Kai-Heng Feng <[email protected]>
---
drivers/gpu/drm/drm_edid.c | 3 +++
1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
index 5dc742b27ca0..3c9fc99648b7 100644
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -116,6 +116,9 @@ static const struct edid_quirk {
/* CPT panel of Asus UX303LA reports 8 bpc, but is a 6 bpc panel */
{ "CPT", 0x17df, EDID_QUIRK_FORCE_6BPC },

+ /* SDC panel of Lenovo B50-80 reports 8 bpc, but is a 6 bpc panel */
+ { "SDC", 0x3652, EDID_QUIRK_FORCE_6BPC },
+
/* Belinea 10 15 55 */
{ "MAX", 1516, EDID_QUIRK_PREFER_LARGE_60 },
{ "MAX", 0x77e, EDID_QUIRK_PREFER_LARGE_60 },
--
2.17.1

2018-08-23 08:28:48

by Daniel Vetter

Subject: Re: [PATCH] drm/edid: Add 6 bpc quirk for SDC panel in Lenovo B50-80

On Thu, Aug 23, 2018 at 05:53:32AM +0000, Kai-Heng Feng wrote:
> Another panel that reports "DFP 1.x compliant TMDS" but it supports 6bpc
> instead of 8 bpc.
>
> Apply 6 bpc quirk for the panel to fix it.
>
> BugLink: https://bugs.launchpad.net/bugs/1788308
> Cc: <[email protected]> # v4.8+
> Signed-off-by: Kai-Heng Feng <[email protected]>

Applied, thanks.
-Daniel

> ---
> drivers/gpu/drm/drm_edid.c | 3 +++
> 1 file changed, 3 insertions(+)
>
> diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
> index 5dc742b27ca0..3c9fc99648b7 100644
> --- a/drivers/gpu/drm/drm_edid.c
> +++ b/drivers/gpu/drm/drm_edid.c
> @@ -116,6 +116,9 @@ static const struct edid_quirk {
> /* CPT panel of Asus UX303LA reports 8 bpc, but is a 6 bpc panel */
> { "CPT", 0x17df, EDID_QUIRK_FORCE_6BPC },
>
> + /* SDC panel of Lenovo B50-80 reports 8 bpc, but is a 6 bpc panel */
> + { "SDC", 0x3652, EDID_QUIRK_FORCE_6BPC },
> +
> /* Belinea 10 15 55 */
> { "MAX", 1516, EDID_QUIRK_PREFER_LARGE_60 },
> { "MAX", 0x77e, EDID_QUIRK_PREFER_LARGE_60 },
> --
> 2.17.1
>
> _______________________________________________
> dri-devel mailing list
> [email protected]
> https://lists.freedesktop.org/mailman/listinfo/dri-devel

--
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch