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 2670B12B6C for ; Fri, 29 Mar 2024 15:17:52 +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=1711725476; cv=none; b=NmMqtHtI5eSwqkEnNahsArfJmAZlNNVLC/4O6r4X9WgZ1FAPy4VoPD3E6wTJj7+4HIRvdna/mxqqBfHiASf3T30NdeMggvg/4eiAo48TIGzcSMffvp7Mc4Up7Uf4LIA1sc4cR5tfwho+EkY0rxdFvnxzR4tGUCK5aXdhpPKe3Hw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1711725476; c=relaxed/simple; bh=kyo1Ad43BuOTHxWe5GQYqSLm6b3RV5mvNXTMTY5jNjg=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=sbbaIALoQbjMnwkW6Cr3nuJfSZbwzqNao1fflzr6eceX5/6Ujvb/p7WVdy81Rbu5dQ0uQZH6JJpjWfjD9fUjbICMgkBWIVTCJYFyUY7Dap2dc9otyvJ4wQhOcjEKimsb92ZUbN5LHxFrYAcLHZdldd+sRcTZX0rMSkHaAnRcg0k= ARC-Authentication-Results:i=1; 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a=rsa-sha256; c=relaxed/simple; d=math.uni-bielefeld.de; s=default; t=1711724885; bh=kyo1Ad43BuOTHxWe5GQYqSLm6b3RV5mvNXTMTY5jNjg=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=x5tk8xFWVOxpyM+tom2a5qJURqK5k0iyba7xZAEMqnkyGvMfgGDyGa9ChvkzpFn1C tcB4hxgfFnjd485lw27m/yCQunGjkFRbUgGQxRhuOA5LNJyAV6S0pFoZEv7CTtFshz wJvDuTziUK57qnqPHv74qZ/xtiYX69tJfHiimJVGB9YRmA7Ud6R/aECmr2UWcjhVNJ 4pD6+DD0vgz7h/d34lUqFIUk+NuAd82f7M1P0CfUePc0tuBwFb/WhBg/74BTA2Ni2o WCLMHWmXkzhqLwfDuSRM/JqCewrHHSiBqgzT8lRkUCQg+IjoHpg8m94W+OBAHzi/Zs STFzgRCaWDIRw== Message-ID: Date: Fri, 29 Mar 2024 16:07:59 +0100 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; Gentle ping...