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Mon, 31 Aug 2026 11:39:34 -0700 (PDT) Received: from hu-mdsor-hyd.qualcomm.com ([202.46.22.19]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-32874498f9esm28349715eec.20.2026.08.31.11.39.27 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 31 Aug 2026 11:39:33 -0700 (PDT) Date: Tue, 1 Sep 2026 00:09:24 +0530 From: Mohit Dsor To: Krzysztof Kozlowski Cc: Luca Ceresoli , Sunyun Yang , Andrzej Hajda , Neil Armstrong , Robert Foss , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Vinod Koul , dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, venkata.valluru@oss.qualcomm.com, Jessica Zhang , Dmitry Baryshkov Subject: Re: [PATCH v11 2/2] drm/bridge: Add Lontium LT9611C(EX/UXD) MIPI DSI to HDMI driver Message-ID: References: <20260824-lt9611c-v7-v11-0-eb4a79cb597c@oss.qualcomm.com> <20260824-lt9611c-v7-v11-2-eb4a79cb597c@oss.qualcomm.com> <178766696083.117435.16339828039068931624.b4-review@b4> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Proofpoint-Spam-Info: AW1haW4tMjYwODMxMDE1OSBTYWx0ZWRfX4w8rQPVkcXb2 7lXhlxXW9phk6Ig4d4TdGp/SFwakeVnIhtV7pGBGH66Pvcwfwk98mPuGrkot0kX/nASJC+BLJ46 bx2VBVaqX+3m9eemZ2xLE4Cg8y5QSGg= X-Authority-Analysis: v=2.4 cv=O7sJeh9W c=1 sm=1 tr=0 ts=6a95ca67 cx=c_pps a=RP+M6JBNLl+fLTcSJhASfg==:117 a=fChuTYTh2wq5r3m49p7fHw==:17 a=kj9zAlcOel0A:10 a=Sv0fKeRqtYgA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=_K5XuSEh1TEqbUxoQ0s3:22 a=BWdvLCTEkTRRry6nPpcA:9 a=CjuIK1q_8ugA:10 a=iS9zxrgQBfv6-_F4QbHw:22 X-Proofpoint-ORIG-GUID: O7gFgUX2bP7LGPKPpLloFmguIJ_YwlOU X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwODMxMDE1OSBTYWx0ZWRfX3/yDVx4DteZy IBI31dasYb7E0KPm6TnGA0hamFn5lKHV91noDnnCWKR3e9EwvXd6T9OZMVCGc5oHfwU8iQ4f6v2 KZ0e8Hkt5LAhhQ9Ns9g/ccKajf7WFj7Ws09xdWXE4vkA0L136+SUAto83LIO7DOVLMDoVgmnsAK KAHK8d+ljjAOw3KNWpqnM+ZTfKBgvrS9XT46qxBkzfQHZBzt3Tr1GAuJo4MCIdJO1s50EbgSdD8 yGeF1/5YQDIn+TJiTsPrSWXwnOcVWX1dmRqkXQq1+k7zMmggayCd4H0IYirYraeADmaJiPHgZ6m nlq6GCis1UkiwjwAwohnhmM40uSs/rJqLLRRag0jh9BDzRhnxPeoJ7BDb9L/e5oFWzn/mzFfOty SZaDgNeIugIPZTcB+NkxRKR3P0Fl1lfXacPWCmM3jdWgdoKW4MT5RGlvk+7gnnz6immIdbbFbXC MyGOYzbysT7LV+OwFUg== X-Proofpoint-GUID: O7gFgUX2bP7LGPKPpLloFmguIJ_YwlOU X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-08-31_06,2026-08-31_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 priorityscore=1501 malwarescore=0 adultscore=0 suspectscore=0 bulkscore=0 spamscore=0 lowpriorityscore=0 impostorscore=0 clxscore=1015 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2608310159 On Tue, Aug 25, 2026 at 04:29:32PM +0200, Krzysztof Kozlowski wrote: > On 25/08/2026 16:09, Luca Ceresoli wrote: > > > >> +static struct i2c_device_id lt9611c_id[] = { > >> + { "lontium,lt9611c", (kernel_ulong_t)<9611c_chip_data[CHIP_LT9611C] }, > >> + { "lontium,lt9611ex", (kernel_ulong_t)<9611c_chip_data[CHIP_LT9611EX] }, > >> + { "lontium,lt9611uxd", (kernel_ulong_t)<9611c_chip_data[CHIP_LT9611UXD] }, > > > > AFAIK there should be no vendor prefix for the i2c_device_id. Have a look > > at the docs and other drivers for the best practice. > > This is because of bugs in the driver, which I reported at v6. Code had > NULL ptr and to solve it, instead of fixing it, Lontium added such prefixes. > > Obviously this is a no-go and they MUST fix the null pointer in the > first place. Will remove the prefix in v12. > > Best regards, > Krzysztof