From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp1.math.uni-bielefeld.de (smtp1.math.uni-bielefeld.de [129.70.45.10]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 431574F618 for ; Sat, 27 Apr 2024 13:54:38 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=129.70.45.10 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714226083; cv=none; b=eXT/ksQe65EeJJbGL475EWjytYHIrULWz/8yrd/T0H7A1GCkdd8XBNJDnjuiXR0/xHW76mmBdm9NmLbNAb869X6ef36dq6vh4Vw3zCARV4PuofiozEWLJyla5FgItsnxE6YvtXHuKDUsTZFPOpDCOc30rqN+Sgcr6swwQ+/5V5Q= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714226083; c=relaxed/simple; bh=2Z2cZ2r3ZL3Y/MT8LeagIDIKA+w/N+Zqp6OvwQwmLwI=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=b4/TgiVE+3euea+lM5bCUTstD+gC+V1Nt963lQ7xeEFRzxCm/pQzHV2aOC3LaTHGcwf3bdEdPAQPWgAAbSE6D/bvvQG6GngZ2vPLtD/AB9FkMPFq7m74FSEpaEjFJ9aKK1HUMn7CEyoytYA0lw6tai6h+cGwNRydx+3sQBO4Q/o= ARC-Authentication-Results:i=1; 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a=rsa-sha256; c=relaxed/simple; d=math.uni-bielefeld.de; s=default; t=1714225766; bh=2Z2cZ2r3ZL3Y/MT8LeagIDIKA+w/N+Zqp6OvwQwmLwI=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=FxDgcFWs5MEv8aGvyMPcUPmUrnkcrUDEGzTyDiPJYz93lPZNAXMVqNYbIKmwcrhn8 h+4qr73/+OnwT480/zXEVHN7zlZaepupTjqYktHFgTCVYwMCFwRjAk04IOxu+oM12u iBhTWFyEa4378j3dd1IwO09tjZJUdCbeBkP3ehHNOzC/wcD4Em7BaVlBN9Lv4ZK8YE kBWoxHClYXM+Ted8C6jP/4z8zMjRXVCG40DgkhmiQ9u6uY42hDMA4VxR6cOiN1DlxZ YPKh65HkUCBXaTBm2Rt5zLRdbJGgtUvXp+Ndloq7d1/gWXTi2/BojMxc0Rll7gGjAG ttMF39oONZcYg== Message-ID: <0782e84f-5fab-4025-ad8e-aa7b56f3fbc6@math.uni-bielefeld.de> Date: Sat, 27 Apr 2024 15:49:22 +0200 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] drm/amd/display: Add MSF panel to DPCD 0x317 patch list To: Harry Wentland , Leo Li , Rodrigo Siqueira , Alex Deucher , =?UTF-8?Q?Christian_K=C3=B6nig?= , "Pan, Xinhui" , David Airlie , Daniel Vetter Cc: amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org References: <20240309014732.722139-1-tjakobi@math.uni-bielefeld.de> Content-Language: en-US From: Tobias Jakobi Autocrypt: addr=tjakobi@math.uni-bielefeld.de; 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charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit On 3/9/24 02:47, tjakobi@math.uni-bielefeld.de wrote: > From: Tobias Jakobi > > 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 > --- > 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!