From: Tobias Jakobi <tjakobi@math.uni-bielefeld.de>
To: "Harry Wentland" <harry.wentland@amd.com>,
"Leo Li" <sunpeng.li@amd.com>,
"Rodrigo Siqueira" <Rodrigo.Siqueira@amd.com>,
"Alex Deucher" <alexander.deucher@amd.com>,
"Christian König" <christian.koenig@amd.com>,
"Pan, Xinhui" <Xinhui.Pan@amd.com>,
"David Airlie" <airlied@gmail.com>,
"Daniel Vetter" <daniel@ffwll.ch>
Cc: amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] drm/amd/display: Add MSF panel to DPCD 0x317 patch list
Date: Sat, 27 Apr 2024 15:49:22 +0200 [thread overview]
Message-ID: <0782e84f-5fab-4025-ad8e-aa7b56f3fbc6@math.uni-bielefeld.de> (raw)
In-Reply-To: <20240309014732.722139-1-tjakobi@math.uni-bielefeld.de>
On 3/9/24 02:47, tjakobi@math.uni-bielefeld.de wrote:
> From: Tobias Jakobi <tjakobi@math.uni-bielefeld.de>
>
> This 8.4 inch panel is integrated in the Ayaneo Kun handheld
> device. The panel resolution is 2560×1600, i.e. it has
> portrait dimensions.
>
> Decoding the EDID shows:
> Manufacturer: MSF
> Model: 4099
> Display Product Name: 'TV080WUM-NL0 '
>
> Judging from the product name this might be a clone of a
> BOE panel, but with larger dimensions.
>
> Panel frequently shows non-functional backlight control. Adding
> some debug prints to update_connector_ext_caps() shows that
> something the OLED bit of ext_caps is set, and then the driver
> assumes that backlight is controlled via AUX.
>
> Forcing backlight control to PWM via amdgpu.backlight=0 restores
> backlight operation.
>
> Signed-off-by: Tobias Jakobi <tjakobi@math.uni-bielefeld.de>
> ---
> drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c
> index 7a09a72e182f..5a017ba94e3c 100644
> --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c
> +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c
> @@ -68,6 +68,7 @@ static void apply_edid_quirks(struct edid *edid, struct dc_edid_caps *edid_caps)
> case drm_edid_encode_panel_id('A', 'U', 'O', 0xE69B):
> case drm_edid_encode_panel_id('B', 'O', 'E', 0x092A):
> case drm_edid_encode_panel_id('L', 'G', 'D', 0x06D1):
> + case drm_edid_encode_panel_id('M', 'S', 'F', 0x1003):
> DRM_DEBUG_DRIVER("Clearing DPCD 0x317 on monitor with panel id %X\n", panel_id);
> edid_caps->panel_patch.remove_sink_ext_caps = true;
> break;
Another gentle ping!
next prev parent reply other threads:[~2024-04-27 13:54 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-03-09 1:47 [PATCH] drm/amd/display: Add MSF panel to DPCD 0x317 patch list tjakobi
2024-03-29 15:07 ` Tobias Jakobi
2024-04-27 13:49 ` Tobias Jakobi [this message]
2024-04-29 16:18 ` Alex Deucher
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