* [PATCH] drm/edid: add 8 bpc quirk to the BenQ GW2765
@ 2023-10-12 18:49 Hamza Mahfooz
2023-10-12 20:55 ` Harry Wentland
2023-10-13 10:30 ` Ville Syrjälä
0 siblings, 2 replies; 4+ messages in thread
From: Hamza Mahfooz @ 2023-10-12 18:49 UTC (permalink / raw)
To: dri-devel
Cc: amd-gfx, Harry Wentland, Alex Deucher, Hamza Mahfooz, stable,
Maarten Lankhorst, Maxime Ripard, Thomas Zimmermann, David Airlie,
Daniel Vetter, linux-kernel
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.
Cc: stable@vger.kernel.org # 6.5+
Link: https://gitlab.freedesktop.org/drm/amd/-/issues/2610
Signed-off-by: Hamza Mahfooz <hamza.mahfooz@amd.com>
---
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
^ permalink raw reply related [flat|nested] 4+ messages in thread* Re: [PATCH] drm/edid: add 8 bpc quirk to the BenQ GW2765
2023-10-12 18:49 [PATCH] drm/edid: add 8 bpc quirk to the BenQ GW2765 Hamza Mahfooz
@ 2023-10-12 20:55 ` Harry Wentland
2023-10-13 10:30 ` Ville Syrjälä
1 sibling, 0 replies; 4+ messages in thread
From: Harry Wentland @ 2023-10-12 20:55 UTC (permalink / raw)
To: Hamza Mahfooz, dri-devel
Cc: amd-gfx, Alex Deucher, stable, Maarten Lankhorst, Maxime Ripard,
Thomas Zimmermann, David Airlie, Daniel Vetter, linux-kernel
On 2023-10-12 14:49, 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.
>
> Cc: stable@vger.kernel.org # 6.5+
> Link: https://gitlab.freedesktop.org/drm/amd/-/issues/2610
> Signed-off-by: Hamza Mahfooz <hamza.mahfooz@amd.com>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Harry
> ---
> 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),
>
^ permalink raw reply [flat|nested] 4+ messages in thread* Re: [PATCH] drm/edid: add 8 bpc quirk to the BenQ GW2765
2023-10-12 18:49 [PATCH] drm/edid: add 8 bpc quirk to the BenQ GW2765 Hamza Mahfooz
2023-10-12 20:55 ` Harry Wentland
@ 2023-10-13 10:30 ` Ville Syrjälä
2023-10-13 11:37 ` Hamza Mahfooz
1 sibling, 1 reply; 4+ messages in thread
From: Ville Syrjälä @ 2023-10-13 10:30 UTC (permalink / raw)
To: Hamza Mahfooz
Cc: dri-devel, Maxime Ripard, amd-gfx, linux-kernel, stable,
Thomas Zimmermann, Alex Deucher
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?
>
> Cc: stable@vger.kernel.org # 6.5+
> Link: https://gitlab.freedesktop.org/drm/amd/-/issues/2610
> Signed-off-by: Hamza Mahfooz <hamza.mahfooz@amd.com>
> ---
> 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
--
Ville Syrjälä
Intel
^ permalink raw reply [flat|nested] 4+ messages in thread* Re: [PATCH] drm/edid: add 8 bpc quirk to the BenQ GW2765
2023-10-13 10:30 ` Ville Syrjälä
@ 2023-10-13 11:37 ` Hamza Mahfooz
0 siblings, 0 replies; 4+ messages in thread
From: Hamza Mahfooz @ 2023-10-13 11:37 UTC (permalink / raw)
To: Ville Syrjälä
Cc: Maxime Ripard, dri-devel, linux-kernel, stable, amd-gfx,
Thomas Zimmermann, Alex Deucher
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@vger.kernel.org # 6.5+
>> Link: https://gitlab.freedesktop.org/drm/amd/-/issues/2610
>> Signed-off-by: Hamza Mahfooz <hamza.mahfooz@amd.com>
>> ---
>> 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
^ permalink raw reply [flat|nested] 4+ messages in thread
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2023-10-12 18:49 [PATCH] drm/edid: add 8 bpc quirk to the BenQ GW2765 Hamza Mahfooz
2023-10-12 20:55 ` Harry Wentland
2023-10-13 10:30 ` Ville Syrjälä
2023-10-13 11:37 ` Hamza Mahfooz
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