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charset=UTF-8 Content-Transfer-Encoding: 7bit X-Proofpoint-GUID: vc7qi5kn6P7tUwc_ymccg1N41zJbacMN X-Proofpoint-ORIG-GUID: vc7qi5kn6P7tUwc_ymccg1N41zJbacMN X-Proofpoint-Spam-Info: AW1haW4tMjYwNzEwMDEyOCBTYWx0ZWRfX9YGYeWwSwrxV 3V+sgh/Lums82RQYaSVFTRt89NZGEOBi7HSp61PM6qRQ5Wl8zwfVuwTtvrd7byi/EWKEzbnlsSd 4TIf1fdWUpo+1q2BA+XfSqol8YRvEFo= X-Authority-Analysis: v=2.4 cv=funsol4f c=1 sm=1 tr=0 ts=6a50ec2f cx=c_pps a=HLyN3IcIa5EE8TELMZ618Q==:117 a=PRfkaYvzSr8QmIIGAkY2Sg==:17 a=IkcTkHD0fZMA:10 a=RAioF0-LDSMA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=DJpcGTmdVt4CTyJn9g5Z:22 a=EUspDBNiAAAA:8 a=3HzQtC_G-ZOHREKSRjcA:9 a=QEXdDO2ut3YA:10 a=bTQJ7kPSJx9SKPbeHEYW:22 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNzEwMDEyOCBTYWx0ZWRfX5xIK/XNhN1CR 65GvcpCtnqX1MpCuIoj1D/28YMdaEsE9WXJyS3fHUDTGffg4VfcBaARLc/nqTcSXeiZSs/1strM k+hlMW17NNGxEzzAXLfyKLNyCvaSYc/DO6P12xsml34rYAqwD6Z9Q7heAlx1NST9OAkexcthbEG 8edcMQxDIPApDF6fc1Q0vNqR3ve/nr9R+SovmRuZShYkCaryxT/wixiNhDz6+cK4QOIrhnpCSsD Bz6b5Dmp75HrLmZT4+8uLOYvB+WhiCHnW0ikBWhEuIzo4ybn214BK8mgXlNxfFdXCJTfAfCRRLf CFU3oKwHuSCJ1YZJEyU6g2T4afGMa96wP909xue+QkeHnVUBpT6RfxWfVxWwfZiAZu5Z6vV7+bl 1T4JOeDGPjSOe2sqwP1yY0sNALfCaKp2tEcZQE7jYkh+p9QtTLZzQRBO5fXLa3rfhPWHvGL6qBS 68Vghksrl8/mO58rW/g== X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-07-10_03,2026-07-09_04,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 phishscore=0 clxscore=1015 lowpriorityscore=0 adultscore=0 bulkscore=0 suspectscore=0 malwarescore=0 priorityscore=1501 impostorscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2607100128 On 7/10/26 2:47 PM, Dmitry Baryshkov wrote: > On Fri, Jul 10, 2026 at 02:10:48PM +0200, Konrad Dybcio wrote: >> On 7/10/26 1:58 PM, Arpit Saini wrote: >>> Hi Konrad, >>> >>> On 7/10/2026 2:31 PM, Arpit Saini wrote: >>>> Hi Konrad, >>>> >>>> On 7/6/2026 3:33 PM, Konrad Dybcio wrote: >>>>> On 7/6/26 8:04 AM, Nabige Aala wrote: >>>>>> From: Arpit Saini [...] >>> I just checked, >>> >>> Normally the backlight EN pin is controlled by a backlight driver. >>> >>> However, this panel uses MIPI DCS based backlight control with no >>> >>> separate backlight driver. Since there is no driver to assert gpio91, >>> >>> we control it via the panel's pinctrl default state.. >>> >>> So this is platform specific pin , we need this to enable/disable >>> >>> the backlight. >> >> Why would the backlight state be so tightly defined by the panel? >> Disabling or adjusting the backlight level without shutting down >> the panel is a perfectly valid use case. >> >> Take a look at pwm-backlight or gpio-backlight. > > This one is different. The backlight is controlled over the DSI link. In > this case there is no separate driver for the backlight, the panel > driver handles it (it needs to be like this for multiple reasons). Ah, OK I misread the statement above as 'this panel [doesn't use] MIPI DCS based backlight' Konrad