ACK: [PATCH v2 1/1] UBUNTU: SAUCE: drm/dp: Another HP DreamColor panel brigntness fix

Stefan Bader stefan.bader at canonical.com
Tue Jan 19 09:53:08 UTC 2021


On 12.01.21 11:54, Kai-Heng Feng wrote:
> BugLink: https://bugs.launchpad.net/bugs/1911001
> 
> Another HP DreamColor panel, which is used by new HP ZBook Fury, needs
> to use DPCD to control brightness.
> 
> Once the proper fix [1] is merged, this can be dropped.
> 
> [1] https://patchwork.freedesktop.org/series/81702/
> 
> Signed-off-by: Kai-Heng Feng <kai.heng.feng at canonical.com>
Acked-by: Stefan Bader <stefan.bader at canonical.com>
> ---
>  drivers/gpu/drm/drm_dp_helper.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/gpu/drm/drm_dp_helper.c b/drivers/gpu/drm/drm_dp_helper.c
> index c55c14453ecb..efd50e87ec99 100644
> --- a/drivers/gpu/drm/drm_dp_helper.c
> +++ b/drivers/gpu/drm/drm_dp_helper.c
> @@ -1881,6 +1881,7 @@ static const struct edid_quirk edid_quirk_list[] = {
>  	 * controls anyway...). Until we have a better way of detecting these,
>  	 * force DPCD backlight mode on all of them.
>  	 */
> +	{ MFG(0x06, 0xaf), PROD_ID(0x8c, 0xcd), BIT(DP_QUIRK_FORCE_DPCD_BACKLIGHT) },
>  	{ MFG(0x06, 0xaf), PROD_ID(0x9b, 0x32), BIT(DP_QUIRK_FORCE_DPCD_BACKLIGHT) },
>  	{ MFG(0x06, 0xaf), PROD_ID(0xeb, 0x41), BIT(DP_QUIRK_FORCE_DPCD_BACKLIGHT) },
>  	{ MFG(0x30, 0xe4), PROD_ID(0x61, 0x06), BIT(DP_QUIRK_FORCE_DPCD_BACKLIGHT) },
> 


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