From: Adam Szyma <adamszyma@wp.pl>
To: neil.armstrong@linaro.org, dri-devel@lists.freedesktop.org
Cc: linux-kernel@vger.kernel.org, Andrzej Hajda 
<andrzej.hajda@intel.com>, Robert Foss <rfoss@kernel.org>, Laurent 
Pinchart <Laurent.pinchart@ideasonboard.com>, Jonas Karlman 
<jonas@kwiboo.se>, Jernej Skrabec <jernej.skrabec@gmail.com>
Subject: [PATCH v2] drm/panel/panel-edp: Add CSOT MPP36 T9 eDP panel
In-Reply-To: <bc921525-1577-424c-a4f7-a0436f8a0ca1@linaro.org>
References: <20260429145251.8445-1-adamszyma@wp.pl> 
<bc921525-1577-424c-a4f7-a0436f8a0ca1@linaro.org>
MIME-Version: 1.0
Content-Type: text/plain


Add support for the CSOT MPP36 T9 eDP panel (manufacturer ID: CSW,
product ID: 0x143d) used in the Dell Inspiron 14 Plus 5441 laptop.

Without this entry the kernel logs:
   panel-simple-dp-aux: Unknown panel CSW 0x143d, using conservative timings

and brightness control is non-functional on affected devices.

Signed-off-by: Adam Szyma <adamszyma@wp.pl>
---
  drivers/gpu/drm/panel/panel-edp.c | 1 +
  1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/panel/panel-edp.c 
b/drivers/gpu/drm/panel/panel-edp.c
index f3cdaea89..0d0072f29 100644
--- a/drivers/gpu/drm/panel/panel-edp.c
+++ b/drivers/gpu/drm/panel/panel-edp.c
@@ -2073,6 +2073,7 @@ static const struct edp_panel_entry edp_panels[] = {
      EDP_PANEL_ENTRY('C', 'S', 'W', 0x1103, &delay_200_500_e80_d50, 
"MNB601LS1-3"),
      EDP_PANEL_ENTRY('C', 'S', 'W', 0x1104, &delay_200_500_e50_d100, 
"MNB601LS1-4"),
      EDP_PANEL_ENTRY('C', 'S', 'W', 0x110a, &delay_200_500_e50, 
"PNB601LS1-2"),
+    EDP_PANEL_ENTRY('C', 'S', 'W', 0x143d, &delay_200_500_e50, "MPP36 
CSOT T9"),
      EDP_PANEL_ENTRY('C', 'S', 'W', 0x143f, &delay_200_500_e50, 
"MNE007QS3-6"),
      EDP_PANEL_ENTRY('C', 'S', 'W', 0x1448, &delay_200_500_e50, 
"MNE007QS3-7"),
      EDP_PANEL_ENTRY('C', 'S', 'W', 0x144b, &delay_200_500_e80, 
"MNE001BS1-4"),
-- 
2.53.0


W dniu 30.04.2026 o 11:45, Neil Armstrong pisze:
> On 4/29/26 16:52, Adam Szyma wrote:
>> Add support for the CSOT MPP36 T9 eDP panel (manufacturer ID: CSW,
>> product ID: 0x143d) used in the Dell Inspiron 14 Plus 5441 laptop.
>>
>> Without this entry the kernel logs:
>>    panel-simple-dp-aux: Unknown panel CSW 0x143d, using conservative 
>> timings
>>
>> and brightness control is non-functional on affected devices.
>>
>> Tested-by: Adam Szyma <adamszyma@wp.pl>
>
> I think it's assumed you tested the patch, so drop this.
>
> Neil
>
>> Signed-off-by: Adam Szyma <adamszyma@wp.pl>
>> ---
>>   drivers/gpu/drm/panel/panel-edp.c | 1 +
>>   1 file changed, 1 insertion(+)
>>
>> diff --git a/drivers/gpu/drm/panel/panel-edp.c 
>> b/drivers/gpu/drm/panel/panel-edp.c
>> index f3cdaea89..0d0072f29 100644
>> --- a/drivers/gpu/drm/panel/panel-edp.c
>> +++ b/drivers/gpu/drm/panel/panel-edp.c
>> @@ -2073,6 +2073,7 @@ static const struct edp_panel_entry 
>> edp_panels[] = {
>>       EDP_PANEL_ENTRY('C', 'S', 'W', 0x1103, &delay_200_500_e80_d50, 
>> "MNB601LS1-3"),
>>       EDP_PANEL_ENTRY('C', 'S', 'W', 0x1104, &delay_200_500_e50_d100, 
>> "MNB601LS1-4"),
>>       EDP_PANEL_ENTRY('C', 'S', 'W', 0x110a, &delay_200_500_e50, 
>> "PNB601LS1-2"),
>> +    EDP_PANEL_ENTRY('C', 'S', 'W', 0x143d, &delay_200_500_e50, 
>> "MPP36 CSOT T9"),
>>       EDP_PANEL_ENTRY('C', 'S', 'W', 0x143f, &delay_200_500_e50, 
>> "MNE007QS3-6"),
>>       EDP_PANEL_ENTRY('C', 'S', 'W', 0x1448, &delay_200_500_e50, 
>> "MNE007QS3-7"),
>>       EDP_PANEL_ENTRY('C', 'S', 'W', 0x144b, &delay_200_500_e80, 
>> "MNE001BS1-4"),
>