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Wed, 07 Aug 2024 01:10:48 -0700 (PDT) Received: from [127.0.1.1] ([2001:67c:2330:2002:af84:a410:1c4f:f793]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-a7dc9c12be2sm614118666b.89.2024.08.07.01.10.48 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 07 Aug 2024 01:10:48 -0700 (PDT) From: Benjamin Bara X-Google-Original-From: Benjamin Bara Subject: [PATCH 0/2] media: i2c: imx290: check for availability in probe() Date: Wed, 07 Aug 2024 10:10:26 +0200 Message-Id: <20240807-imx290-avail-v1-0-666c130c7601@skidata.com> Precedence: bulk X-Mailing-List: linux-media@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-B4-Tracking: v=1; b=H4sIAPIrs2YC/x3MQQqAIBBA0avIrBNMErWrRAvRqQbKQiEE8e5Jy 7f4v0LGRJhhZhUSvpTpjh3jwMAfLu7IKXSDFHISRmhOV5FWcPc6OrlR2iovdbDGQE+ehBuVf7e srX0mx0uaXgAAAA== To: Mauro Carvalho Chehab , Manivannan Sadhasivam , Sakari Ailus Cc: Hans de Goede , Laurent Pinchart , linux-media@vger.kernel.org, linux-kernel@vger.kernel.org, Benjamin Bara X-Mailer: b4 0.14.1 X-LSpam-Score: -7.6 (-------) X-LSpam-Report: No, score=-7.6 required=5.0 tests=ARC_SIGNED=0.001,ARC_VALID=-0.1,BAYES_00=-1.9,DKIM_SIGNED=0.1,DKIM_VALID=-0.1,DKIM_VALID_AU=-0.1,DMARC_PASS=-0.001,FREEMAIL_FORGED_FROMDOMAIN=1,FREEMAIL_FROM=0.001,HEADER_FROM_DIFFERENT_DOMAINS=0.5,MAILING_LIST_MULTI=-1,RCVD_IN_DNSWL_MED=-2.3,RCVD_IN_VALIDITY_CERTIFIED=-3,RCVD_IN_VALIDITY_RPBL=1.31,RCVD_IN_VALIDITY_SAFE=-2,SPF_HELO_NONE=0.001,SPF_PASS=-0.001 autolearn=ham autolearn_force=no Hi! First commit is optional and just adds the possibility to do a cci_read() without caring about the read value. If not wanted, I can remove it. Second commit tries to communicate with the sensor (reading back the STANDBY register) to find out if the sensor is available at probe time. Currently, the first device communication is happening after the v4l2 subdev is initialized - and the communication errors are then basically ignored. thanks & regards Benjamin --- Benjamin Bara (2): media: v4l2-cci: Allow "empty read" media: i2c: imx290: Check for availability in probe() drivers/media/i2c/imx290.c | 5 +++++ drivers/media/v4l2-core/v4l2-cci.c | 5 ++++- include/media/v4l2-cci.h | 2 +- 3 files changed, 10 insertions(+), 2 deletions(-) --- base-commit: eec5d86d5bac6b3e972eb9c1898af3c08303c52d change-id: 20240807-imx290-avail-85795c27d988 Best regards,