Hi Marco, Thank you for the patch.
On Mon, Apr 15, 2019 at 02:44:12PM +0200, Marco Felsch wrote: > The tvp5150 accepts NTSC(M,J,4.43), PAL (B,D,G,H,I,M,N) and SECAM video > data and is able to auto-detect the input signal. The auto-detection > does not work if the connector does not receive an input signal and the > tvp5150 might not be configured correctly. This misconfiguration leads > into wrong decoded video streams if the tvp5150 gets powered on before > the video signal is present. > > Limit the supported tv norms according to the actual selected connector > to avoid a misconfiguration. This seems a bit of a hack to me. In particular, on what grounds would you specify a particular configuration in DT ? Also, this issue affects non-DT systems, and should be solved globally. > Signed-off-by: Marco Felsch <m.fel...@pengutronix.de> > --- > [1] https://patchwork.kernel.org/cover/10794703/ > > v5: > - probe() initialize supported tv-norms according the given connectors > if they are available. > - check if media-controller is used. Don't limit the norm if it isn't > used. > - add more logic to be smarter during connector changing so it is > intuitiver for the user space. > > v2-v4: > - nothing since the patch was squashed from series [1] into this > series. > > drivers/media/i2c/tvp5150.c | 69 +++++++++++++++++++++++++++++++++++-- > 1 file changed, 67 insertions(+), 2 deletions(-) > > diff --git a/drivers/media/i2c/tvp5150.c b/drivers/media/i2c/tvp5150.c > index cd54715eb641..c0ee08546643 100644 > --- a/drivers/media/i2c/tvp5150.c > +++ b/drivers/media/i2c/tvp5150.c > @@ -32,6 +32,13 @@ > #define TVP5150_MBUS_FMT MEDIA_BUS_FMT_UYVY8_2X8 > #define TVP5150_FIELD V4L2_FIELD_ALTERNATE > #define TVP5150_COLORSPACE V4L2_COLORSPACE_SMPTE170M > +#define TVP5150_STD_MASK (V4L2_STD_NTSC | \ > + V4L2_STD_NTSC_443 | \ > + V4L2_STD_PAL | \ > + V4L2_STD_PAL_M | \ > + V4L2_STD_PAL_N | \ > + V4L2_STD_PAL_Nc | \ > + V4L2_STD_SECAM) > > MODULE_DESCRIPTION("Texas Instruments TVP5150A/TVP5150AM1/TVP5151 video > decoder driver"); > MODULE_AUTHOR("Mauro Carvalho Chehab"); > @@ -66,6 +73,7 @@ struct tvp5150 { > /* media-ctl properties */ > struct media_pad pads[TVP5150_NUM_PADS]; > struct tvp5150_connector *connectors; > + struct tvp5150_connector *cur_connector; > int connectors_num; > > struct v4l2_ctrl_handler hdl; > @@ -785,17 +793,28 @@ static int tvp5150_g_std(struct v4l2_subdev *sd, > v4l2_std_id *std) > static int tvp5150_s_std(struct v4l2_subdev *sd, v4l2_std_id std) > { > struct tvp5150 *decoder = to_tvp5150(sd); > + struct tvp5150_connector *cur_con = decoder->cur_connector; > + v4l2_std_id supported_norms = cur_con ? > + cur_con->base.connector.analog.supported_tvnorms : V4L2_STD_ALL; > > if (decoder->norm == std) > return 0; > > + /* > + * check if requested std or group of std's is/are supported by the > + * connector > + */ > + if ((supported_norms & std) == 0) > + return -EINVAL; > + > /* Change cropping height limits */ > if (std & V4L2_STD_525_60) > decoder->rect.height = TVP5150_V_MAX_525_60; > else > decoder->rect.height = TVP5150_V_MAX_OTHERS; > > - decoder->norm = std; > + /* set only the specific supported std in case of group of std's */ > + decoder->norm = supported_norms & std; > > return tvp5150_set_std(sd, std); > } > @@ -1347,6 +1366,8 @@ static int tvp5150_link_setup(struct media_entity > *entity, > TVP5150_BLACK_SCREEN, 0); > > if (flags & MEDIA_LNK_FL_ENABLED) { > + u32 new_norm; > + > /* > * S-Video connector is conneted to both ports AIP1A and AIP1B. > * Both links must be enabled in one-shot regardless which link > @@ -1358,6 +1379,26 @@ static int tvp5150_link_setup(struct media_entity > *entity, > if (err) > return err; > } > + > + /* Update the current connector */ > + decoder->cur_connector = > + container_of(remote, struct tvp5150_connector, pad); > + > + /* > + * Do nothing if the new connector supports the same tv-norms as > + * the old one. > + */ > + new_norm = decoder->norm & > + > decoder->cur_connector->base.connector.analog.supported_tvnorms; > + if (decoder->norm == new_norm) > + return 0; > + > + /* > + * Fallback to the new connector tv-norms if we can't find any > + * common between the current tv-norm and the new one. > + */ > + tvp5150_s_std(sd, new_norm ? new_norm : > + > decoder->cur_connector->base.connector.analog.supported_tvnorms); > } > > return 0; > @@ -1576,6 +1617,9 @@ static int tvp5150_registered(struct v4l2_subdev *sd) > TVP5150_COMPOSITE1; > > tvp5150_selmux(sd); > + decoder->cur_connector = &decoder->connectors[i]; > + tvp5150_s_std(sd, > + > decoder->connectors[i].base.connector.analog.supported_tvnorms); > } > } > #endif > @@ -1903,6 +1947,11 @@ static int tvp5150_parse_dt(struct tvp5150 *decoder, > struct device_node *np) > ret = -EINVAL; > goto err; > } > + if (!(c.connector.analog.supported_tvnorms & > + TVP5150_STD_MASK)) > + dev_warn(dev, > + "Unsupported tv-norm on connector > %s.\n", > + c.label); > in++; > break; > case TVP5150_PAD_VID_OUT: > @@ -2011,7 +2060,23 @@ static int tvp5150_probe(struct i2c_client *c, > if (res < 0) > goto err_cleanup_dt; > > - core->norm = V4L2_STD_ALL; /* Default is autodetect */ > + /* > + * Iterate over all available connectors in case they are supported and > + * successfully parsed. Fallback to default autodetect in case they > + * aren't supported. > + */ > + if (core->connectors) { > + struct v4l2_fwnode_connector *con; > + int i; > + > + for (i = 0; i < core->connectors_num; i++) { > + con = &core->connectors[i].base; > + core->norm |= con->connector.analog.supported_tvnorms; > + } > + } else { > + core->norm = V4L2_STD_ALL; > + } > + > core->detected_norm = V4L2_STD_UNKNOWN; > core->input = TVP5150_COMPOSITE1; > core->enable = true; > -- > 2.20.1 > -- Regards, Laurent Pinchart
