[PATCH v5 3/4] drm: panel-backlight-quirks: Add Framework 13 matte panel

[Mario Limonciello]

On 8/18/2024 01:56, Thomas Weißschuh wrote:
> The value of "min_input_signal" returned from ATIF on a Framework AMD 13
> is "12". This leads to a fairly bright minimum display backlight.
> 
> Add a quirk to override that the minimum backlight PWM to "0" which
> leads to a much lower minimum brightness, which is still visible.
> 
> Tested on a Framework AMD 13 BIOS 3.05 with the matte panel.
> 
> Link: https://community.frame.work/t/25711/9
> Link: https://community.frame.work/t/47036
> Signed-off-by: Thomas Weißschuh <linux at weissschuh.net>
> Tested-by: Dustin L. Howett <dustin at howett.net>
Reviewed-by: Mario Limonciello <mario.limonciello at amd.com>
> ---
>   drivers/gpu/drm/drm_panel_backlight_quirks.c | 8 ++++++++
>   1 file changed, 8 insertions(+)
> 
> diff --git a/drivers/gpu/drm/drm_panel_backlight_quirks.c b/drivers/gpu/drm/drm_panel_backlight_quirks.c
> index 6b8bbed77c7f..f2aefff618dd 100644
> --- a/drivers/gpu/drm/drm_panel_backlight_quirks.c
> +++ b/drivers/gpu/drm/drm_panel_backlight_quirks.c
> @@ -17,6 +17,14 @@ struct drm_panel_min_backlight_quirk {
>   };
>   
>   static const struct drm_panel_min_backlight_quirk drm_panel_min_backlight_quirks[] = {
> +	/* 13 inch matte panel */
> +	{
> +		.dmi_match.field = DMI_BOARD_VENDOR,
> +		.dmi_match.value = "Framework",
> +		.ident.panel_id = drm_edid_encode_panel_id('B', 'O', 'E', 0x0bca),
> +		.ident.name = "NE135FBM-N41",
> +		.min_brightness = 0,
> +	},
>   };
>   
>   static bool drm_panel_min_backlight_quirk_matches(const struct drm_panel_min_backlight_quirk *quirk,
>