Hi Jacopo, Thank you for the patch. On Fri, May 03, 2024 at 05:51:22PM +0200, Jacopo Mondi wrote: > The adv748x-csi2 driver configures the CSI-2 transmitter to > automatically infer the image stream format from the connected > frontend (HDMI or AFE). > > Setting a new format on the subdevice hence does not actually control > the CSI-2 output format, but it's only there for the purpose of > pipeline validation. > > However, there is currently no validation that the supplied media bus > code is valid and supported by the device. > > With the introduction of enum_mbus_codes a list of supported format is > now available, use it to validate that the supplied format is correct > and use the default YUYV8 one if that's not the case. > > Signed-off-by: Jacopo Mondi <jacopo.mondi@xxxxxxxxxxxxxxxx> > --- > drivers/media/i2c/adv748x/adv748x-csi2.c | 27 +++++++++++++++++++++++- > 1 file changed, 26 insertions(+), 1 deletion(-) > > diff --git a/drivers/media/i2c/adv748x/adv748x-csi2.c b/drivers/media/i2c/adv748x/adv748x-csi2.c > index 219417b319a6..1aae6467ca62 100644 > --- a/drivers/media/i2c/adv748x/adv748x-csi2.c > +++ b/drivers/media/i2c/adv748x/adv748x-csi2.c > @@ -215,6 +215,23 @@ static int adv748x_csi2_get_format(struct v4l2_subdev *sd, > return 0; > } > > +static int adv748x_csi2_is_fmt_supported(struct adv748x_csi2 *tx, > + unsigned int code) > +{ > + const unsigned int *codes = is_txa(tx) ? > + adv748x_csi2_txa_fmts : > + adv748x_csi2_txb_fmts; > + size_t num_fmts = is_txa(tx) ? ARRAY_SIZE(adv748x_csi2_txa_fmts) > + : ARRAY_SIZE(adv748x_csi2_txb_fmts); > + > + for (unsigned int i = 0; i < num_fmts; i++) { > + if (codes[i] == code) > + return 0; > + } > + > + return -EINVAL; > +} > + > static int adv748x_csi2_set_format(struct v4l2_subdev *sd, > struct v4l2_subdev_state *sd_state, > struct v4l2_subdev_format *sdformat) > @@ -222,7 +239,15 @@ static int adv748x_csi2_set_format(struct v4l2_subdev *sd, > struct adv748x_csi2 *tx = adv748x_sd_to_csi2(sd); > struct adv748x_state *state = tx->state; > struct v4l2_mbus_framefmt *mbusformat; > - int ret = 0; > + int ret; > + > + /* > + * Make sure the format is supported, if not default it to > + * YUYV8 as it's supported by both TXes. As indicated in the review if 06/11, I think this should be UYVY8 > + */ > + ret = adv748x_csi2_is_fmt_supported(tx, sdformat->format.code); > + if (ret) > + sdformat->format.code = MEDIA_BUS_FMT_YUYV8_1X16; > > mbusformat = adv748x_csi2_get_pad_format(sd, sd_state, sdformat->pad, > sdformat->which); -- Regards, Laurent Pinchart