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[78.88.45.245]) by smtp.gmail.com with ESMTPSA id 4fb4d7f45d1cf-64750a90d45sm1373506a12.8.2025.11.27.03.47.20 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 27 Nov 2025 03:47:21 -0800 (PST) Message-ID: <6eb8681d-d82e-457f-907d-3ba5b94267f2@oss.qualcomm.com> Date: Thu, 27 Nov 2025 12:47:19 +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] media: venus: assign unique bus_info strings for encoder and decoder To: Jorge Ramirez Cc: vikash.garodia@oss.qualcomm.com, dikshita.agarwal@oss.qualcomm.com, bod@kernel.org, mchehab@kernel.org, linux-media@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org References: <20251121184306.218169-1-jorge.ramirez@oss.qualcomm.com> <249ccbbc-7990-43f0-b205-d5f33a1c9ad3@oss.qualcomm.com> Content-Language: en-US From: Konrad Dybcio In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Authority-Analysis: v=2.4 cv=AKyLkLWT c=1 sm=1 tr=0 ts=69283a4b cx=c_pps a=WeENfcodrlLV9YRTxbY/uA==:117 a=FpWmc02/iXfjRdCD7H54yg==:17 a=IkcTkHD0fZMA:10 a=6UeiqGixMTsA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=EUspDBNiAAAA:8 a=g2FNSR5juNlgVfHlpaMA:9 a=QEXdDO2ut3YA:10 a=kacYvNCVWA4VmyqE58fU:22 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUxMTI3MDA4NyBTYWx0ZWRfX8JZSjn5R0Yxl 3YF/k18NUyV0rpB7Ykb9S9Z+m9CmlLWsFfCl6HmwLMYI4Z34wf0j3JOLyJF0A7y+7Z3EpwuVmJR v4WEuFPB9nduHLEwdOtaIUMn1E33r2RIlMca9qRC523k66bYkkjUq8YhxJ6sBUaCtTkPz0sezZq XxJFq5CDcgy1V6l7Ms39iCZbhEzQsj+gsK5IIN+HxpMcPOXUw/nxQ9O6BlNRqpIF4XDUOyxmkpe Mgr1uy43aDtxQukYPkYpVsfyIIbHDMTJgn6tcjQXtEODfZwXsxyCwRT7U4s82cKVXN3QJFlXZ/x GWWmXYVPxaGiBDlPVDcCGjzYDuyD7xQQUZmPQ5c9qFJyk6L1VXSdbPdgYVBxq8iJJpOHn8/djds 1cl5EZ1bMoivVAdM9oLVOjooxFeAFA== X-Proofpoint-GUID: dx1OmRAdC7i0rNrqXbzl7wBbS21DWD1P X-Proofpoint-ORIG-GUID: dx1OmRAdC7i0rNrqXbzl7wBbS21DWD1P X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.9,FMLib:17.12.100.49 definitions=2025-11-25_02,2025-11-26_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 bulkscore=0 clxscore=1015 spamscore=0 lowpriorityscore=0 priorityscore=1501 suspectscore=0 adultscore=0 malwarescore=0 impostorscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2510240001 definitions=main-2511270087 On 11/25/25 1:55 PM, Jorge Ramirez wrote: > On 21/11/25 20:22:13, Konrad Dybcio wrote: >> On 11/21/25 7:43 PM, Jorge Ramirez-Ortiz wrote: >>> The Venus encoder and decoder video devices currently report the same >>> bus_info string ("platform:qcom-venus"). >>> >>> Assign unique bus_info identifiers by appending ":dec" and ":enc" to the >>> parent device name. With this change v4l2-ctl will display two separate >>> logical devices >>> >>> Signed-off-by: Jorge Ramirez-Ortiz >>> --- >> >> Perhaps that's a stupid question, but is there a reason they're >> separate at all? > > not sure I understand, enc/dec support different APIs, v4l2 controls..is > that what you mean? Perhaps that shows my lack of knowledge about V4L2. I had imagined that a single video device could implement (non-colliding) enc_xyz and dec_xyz operations and was wondering why we need two. Konrad