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[34.88.52.90]) by smtp.gmail.com with ESMTPSA id 2adb3069b0e04-5532f62a6eesm376805e87.98.2025.05.28.10.58.16 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 28 May 2025 10:58:16 -0700 (PDT) From: Ricardo Ribalda Date: Wed, 28 May 2025 17:58:03 +0000 Subject: [PATCH 8/9] media: uvcvideo: Do not turn on the camera unless is needed 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="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20250528-uvc-grannular-invert-v1-8-d01581f9cc25@chromium.org> References: <20250528-uvc-grannular-invert-v1-0-d01581f9cc25@chromium.org> In-Reply-To: <20250528-uvc-grannular-invert-v1-0-d01581f9cc25@chromium.org> To: Laurent Pinchart , Hans de Goede , Mauro Carvalho Chehab , Hans Verkuil Cc: linux-media@vger.kernel.org, linux-kernel@vger.kernel.org, Ricardo Ribalda X-Mailer: b4 0.14.2 There are a lot of IOCTLs that do not need to turn on the camera. Eg: - They only operate to internal data, like UVCIOC_CTRL_MAP. - They are not applicable to the uvc driver, like VIDIOC_G_AUDIO. - They are handled by the uvc framework, like VIDIOC_STREAMON. Remove them from the turn-on list. Signed-off-by: Ricardo Ribalda --- drivers/media/usb/uvc/uvc_v4l2.c | 57 ---------------------------------------- 1 file changed, 57 deletions(-) diff --git a/drivers/media/usb/uvc/uvc_v4l2.c b/drivers/media/usb/uvc/uvc_v4l2.c index e7373a2ae3c37ca02f9076773154901a603820ac..fcb1b79c214849ce4da96a86a688d777b32cc688 100644 --- a/drivers/media/usb/uvc/uvc_v4l2.c +++ b/drivers/media/usb/uvc/uvc_v4l2.c @@ -1291,75 +1291,18 @@ static long uvc_v4l2_unlocked_ioctl(struct file *file, /* The following IOCTLs do need to turn on the camera. */ switch (cmd) { - case UVCIOC_CTRL_MAP: case UVCIOC_CTRL_QUERY: - case VIDIOC_CROPCAP: - case VIDIOC_DBG_G_CHIP_INFO: - case VIDIOC_DBG_G_REGISTER: - case VIDIOC_DBG_S_REGISTER: - case VIDIOC_DECODER_CMD: - case VIDIOC_DQEVENT: - case VIDIOC_DV_TIMINGS_CAP: - case VIDIOC_ENCODER_CMD: - case VIDIOC_ENUMAUDIO: - case VIDIOC_ENUMAUDOUT: - case VIDIOC_ENUMOUTPUT: - case VIDIOC_ENUMSTD: - case VIDIOC_ENUM_DV_TIMINGS: - case VIDIOC_ENUM_FREQ_BANDS: - case VIDIOC_G_AUDIO: - case VIDIOC_G_AUDOUT: - case VIDIOC_G_CROP: case VIDIOC_G_CTRL: - case VIDIOC_G_DV_TIMINGS: - case VIDIOC_G_EDID: - case VIDIOC_G_ENC_INDEX: case VIDIOC_G_EXT_CTRLS: - case VIDIOC_G_FBUF: - case VIDIOC_G_FREQUENCY: case VIDIOC_G_INPUT: - case VIDIOC_G_JPEGCOMP: - case VIDIOC_G_MODULATOR: - case VIDIOC_G_OUTPUT: - case VIDIOC_G_PRIORITY: - case VIDIOC_G_SLICED_VBI_CAP: - case VIDIOC_G_STD: - case VIDIOC_G_TUNER: - case VIDIOC_LOG_STATUS: - case VIDIOC_OVERLAY: - case VIDIOC_PREPARE_BUF: - case VIDIOC_QUERYBUF: - case VIDIOC_QUERYCAP: case VIDIOC_QUERYCTRL: case VIDIOC_QUERYMENU: - case VIDIOC_QUERYSTD: - case VIDIOC_QUERY_DV_TIMINGS: case VIDIOC_QUERY_EXT_CTRL: - case VIDIOC_REMOVE_BUFS: - case VIDIOC_STREAMOFF: - case VIDIOC_STREAMON: - case VIDIOC_S_AUDIO: - case VIDIOC_S_AUDOUT: - case VIDIOC_S_CROP: case VIDIOC_S_CTRL: - case VIDIOC_S_DV_TIMINGS: - case VIDIOC_S_EDID: case VIDIOC_S_EXT_CTRLS: - case VIDIOC_S_FBUF: case VIDIOC_S_FMT: - case VIDIOC_S_FREQUENCY: - case VIDIOC_S_HW_FREQ_SEEK: case VIDIOC_S_INPUT: - case VIDIOC_S_JPEGCOMP: - case VIDIOC_S_MODULATOR: - case VIDIOC_S_OUTPUT: case VIDIOC_S_PARM: - case VIDIOC_S_PRIORITY: - case VIDIOC_S_SELECTION: - case VIDIOC_S_STD: - case VIDIOC_S_TUNER: - case VIDIOC_TRY_DECODER_CMD: - case VIDIOC_TRY_ENCODER_CMD: case VIDIOC_TRY_EXT_CTRLS: case VIDIOC_TRY_FMT: return uvc_v4l2_pm_ioctl(file, cmd, arg); -- 2.49.0.1266.g31b7d2e469-goog