From: Eugen Hristev eugen.hristev@microchip.com
[ Upstream commit da653498c20ba5b185214d8ae43b4e8e9594f520 ]
pm_runtime_resume_and_get should be called when the s_frame_interval is called.
The driver will try to access device registers to configure VMAX, coarse time and exposure.
Currently if the runtime is not resumed, this fails: # media-ctl -d /dev/media0 --set-v4l2 '"IMX274 1-001a":0[fmt:SRGGB10_1X10/3840x2 160@1/10]'
IMX274 1-001a: imx274_binning_goodness: ask 3840x2160, size 3840x2160, goodness 0 IMX274 1-001a: imx274_binning_goodness: ask 3840x2160, size 1920x1080, goodness -3000 IMX274 1-001a: imx274_binning_goodness: ask 3840x2160, size 1280x720, goodness -4000 IMX274 1-001a: imx274_binning_goodness: ask 3840x2160, size 1280x540, goodness -4180 IMX274 1-001a: __imx274_change_compose: selected 1x1 binning IMX274 1-001a: imx274_set_frame_interval: input frame interval = 1 / 10 IMX274 1-001a: imx274_read_mbreg : addr 0x300e, val=0x1 (2 bytes) IMX274 1-001a: imx274_set_frame_interval : register SVR = 1 IMX274 1-001a: imx274_read_mbreg : addr 0x30f6, val=0x6a8 (2 bytes) IMX274 1-001a: imx274_set_frame_interval : register HMAX = 1704 IMX274 1-001a: imx274_set_frame_length : input length = 2112 IMX274 1-001a: imx274_write_mbreg : i2c bulk write failed, 30f8 = 884 (3 bytes) IMX274 1-001a: imx274_set_frame_length error = -121 IMX274 1-001a: imx274_set_frame_interval error = -121 Unable to setup formats: Remote I/O error (121)
The device is not resumed thus the remote I/O error.
Setting the frame interval works at streaming time, because pm_runtime_resume_and_get is called at s_stream time before sensor setup. The failure happens when only the s_frame_interval is called separately independently on streaming time.
Fixes: ad97bc37426c ("media: i2c: imx274: Add IMX274 power on and off sequence") Signed-off-by: Eugen Hristev eugen.hristev@microchip.com Signed-off-by: Sakari Ailus sakari.ailus@linux.intel.com Signed-off-by: Mauro Carvalho Chehab mchehab+huawei@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/media/i2c/imx274.c | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/drivers/media/i2c/imx274.c b/drivers/media/i2c/imx274.c index 0dce92872176d..4d9b64c61f603 100644 --- a/drivers/media/i2c/imx274.c +++ b/drivers/media/i2c/imx274.c @@ -1367,6 +1367,10 @@ static int imx274_s_frame_interval(struct v4l2_subdev *sd, int min, max, def; int ret;
+ ret = pm_runtime_resume_and_get(&imx274->client->dev); + if (ret < 0) + return ret; + mutex_lock(&imx274->lock); ret = imx274_set_frame_interval(imx274, fi->interval);
@@ -1398,6 +1402,7 @@ static int imx274_s_frame_interval(struct v4l2_subdev *sd,
unlock: mutex_unlock(&imx274->lock); + pm_runtime_put(&imx274->client->dev);
return ret; }