Re: [PATCH] drm/edid: add 8 bpc quirk to the BenQ GW2765

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On 10/13/23 06:30, Ville Syrjälä wrote:
On Thu, Oct 12, 2023 at 02:49:27PM -0400, Hamza Mahfooz wrote:
The BenQ GW2765 reports that it supports higher (> 8) bpc modes, but
when trying to set them we end up with a black screen. So, limit it to 8
bpc modes.

Bad cable/etc was ruled out as the cause?

Yup, the issue was also reproduced by two different people with same
aforementioned monitor.



Cc: stable@xxxxxxxxxxxxxxx # 6.5+
Link: https://gitlab.freedesktop.org/drm/amd/-/issues/2610
Signed-off-by: Hamza Mahfooz <hamza.mahfooz@xxxxxxx>
---
  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 0454da505687..bca2af4fe1fc 100644
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -123,6 +123,9 @@ static const struct edid_quirk {
  	/* AEO model 0 reports 8 bpc, but is a 6 bpc panel */
  	EDID_QUIRK('A', 'E', 'O', 0, EDID_QUIRK_FORCE_6BPC),
+ /* BenQ GW2765 */
+	EDID_QUIRK('B', 'N', 'Q', 0x78d6, EDID_QUIRK_FORCE_8BPC),
+
  	/* BOE model on HP Pavilion 15-n233sl reports 8 bpc, but is a 6 bpc panel */
  	EDID_QUIRK('B', 'O', 'E', 0x78b, EDID_QUIRK_FORCE_6BPC),
--
2.42.0

--
Hamza




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