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authorMarco Felsch <m.felsch@pengutronix.de>2019-01-31 11:35:16 +0100
committerMarco Felsch <m.felsch@pengutronix.de>2019-08-19 16:09:11 +0200
commit71a47fb26828ef563ac7178abfee4a09352fbe34 (patch)
treeab0a64ea496c6100fc9e65267f509d09f44b89ce
parent196306e3d85886a0682e7da2c12a1b5b12f89a1e (diff)
downloadlinux-0-day-71a47fb26828ef563ac7178abfee4a09352fbe34.tar.gz
linux-0-day-71a47fb26828ef563ac7178abfee4a09352fbe34.tar.xz
media: tvp5150: add support to limit sdtv standards
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 sdtv standards according to the actual selected connector to avoid a misconfiguration. Signed-off-by: Marco Felsch <m.felsch@pengutronix.de> --- [1] https://patchwork.kernel.org/cover/10794703/ v8: - adapt commit message - fix rebasing issue - apdapt to new v4l2_fwnode_connector_analog naming - fix cur_connector update during tvp5150_link_setup() -> Only update if we have of-connectors. - fix supported_stds detection during tvp5150_s_std() -> use connectors_num to detect of-connectors presence 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.
-rw-r--r--drivers/media/i2c/tvp5150.c78
1 files changed, 76 insertions, 2 deletions
diff --git a/drivers/media/i2c/tvp5150.c b/drivers/media/i2c/tvp5150.c
index b84975bdb1d4..c81d8fde079d 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)
#define TVP5150_MAX_CONNECTORS 3 /* Check dt-bindings for more informations. */
@@ -64,6 +71,7 @@ struct tvp5150 {
struct media_pad pads[TVP5150_NUM_PADS];
struct tvp5150_connector connectors[TVP5150_MAX_CONNECTORS];
+ struct tvp5150_connector *cur_connector;
unsigned int connectors_num;
struct v4l2_ctrl_handler hdl;
@@ -783,17 +791,33 @@ 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_stds;
if (decoder->norm == std)
return 0;
+ /* In case of no of-connectors are available no limitations are made */
+ if (!decoder->connectors_num)
+ supported_stds = V4L2_STD_ALL;
+ else
+ supported_stds = cur_con->base.connector.analog.sdtv_stds;
+
+ /*
+ * Check if requested std or group of std's is/are supported by the
+ * connector.
+ */
+ if ((supported_stds & 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_stds & std;
return tvp5150_set_std(sd, std);
}
@@ -1329,6 +1353,8 @@ 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
@@ -1340,6 +1366,29 @@ static int tvp5150_link_setup(struct media_entity *entity,
if (err)
return err;
}
+
+ if (!decoder->connectors_num)
+ return 0;
+
+ /* 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.sdtv_stds;
+ 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.sdtv_stds);
}
return 0;
@@ -1557,6 +1606,9 @@ 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.sdtv_stds);
}
}
@@ -1846,6 +1898,13 @@ tvp5150_add_connector(struct tvp5150 *decoder, struct device_node *np,
goto err;
}
+ if (!(vc->connector.analog.sdtv_stds & TVP5150_STD_MASK)) {
+ dev_err(dev, "Unsupported tv-norm on connector %s\n",
+ remote_np->name);
+ ret = -EINVAL;
+ goto err;
+ }
+
c->ent.flags = MEDIA_ENT_FL_CONNECTOR;
c->ent.name = vc->label;
c->ent.name = kasprintf(GFP_KERNEL, "%s %s", remote_np->name,
@@ -1941,6 +2000,7 @@ static int tvp5150_probe(struct i2c_client *c)
struct v4l2_subdev *sd;
struct device_node *np = c->dev.of_node;
struct regmap *map;
+ unsigned int i;
int res;
/* Check if the adapter supports the needed features */
@@ -1985,7 +2045,21 @@ static int tvp5150_probe(struct i2c_client *c)
if (res < 0)
return res;
- 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.
+ */
+ for (i = 0; i < core->connectors_num; i++) {
+ struct v4l2_fwnode_connector *vc;
+
+ vc = &core->connectors[i].base;
+ core->norm |= vc->connector.analog.sdtv_stds;
+ }
+
+ if (!core->connectors_num)
+ core->norm = V4L2_STD_ALL;
+
core->detected_norm = V4L2_STD_UNKNOWN;
core->input = TVP5150_COMPOSITE1;
core->enable = true;