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| author | Matthew Michilot <matthew.michilot@gmail.com> | 2021-06-04 23:22:17 +0200 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab+huawei@kernel.org> | 2021-07-22 11:40:46 +0200 |
| commit | ed771d75af3cf7e8747ab6a5c207cd920fe0adaa (patch) | |
| tree | f189d9635b0f172fdb713b1d9d2b5e908759e27f | |
| parent | 28d1e47694aff751cfb1d86a2f9701f0a22e5f1e (diff) | |
| download | linux-ed771d75af3cf7e8747ab6a5c207cd920fe0adaa.tar.bz2 | |
media: i2c: adv7180: fix adv7280 BT.656-4 compatibility
Captured video would be out of sync when using the adv7280 with
the BT.656-4 protocol. Certain registers (0x04, 0x31, 0xE6) had to
be configured properly to ensure BT.656-4 compatibility.
An error in the adv7280 reference manual suggested that EAV/SAV mode
was enabled by default, however upon inspecting register 0x31, it was
determined to be disabled by default.
[fabio: Introduce "adv,force-bt656-4" to not affect the existing users]
[hverkuil: fix a small checkpatch alignment warning]
Signed-off-by: Matthew Michilot <matthew.michilot@gmail.com>
Reviewed-by: Tim Harvey <tharvey@gateworks.com>
Signed-off-by: Fabio Estevam <festevam@gmail.com>
Tested-by: Tim Harvey <tharvey@gateworks.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
| -rw-r--r-- | drivers/media/i2c/adv7180.c | 30 |
1 files changed, 26 insertions, 4 deletions
diff --git a/drivers/media/i2c/adv7180.c b/drivers/media/i2c/adv7180.c index 81dd9eba19ba..d9a99fcfacb1 100644 --- a/drivers/media/i2c/adv7180.c +++ b/drivers/media/i2c/adv7180.c @@ -94,6 +94,7 @@ #define ADV7180_REG_SHAP_FILTER_CTL_1 0x0017 #define ADV7180_REG_CTRL_2 0x001d #define ADV7180_REG_VSYNC_FIELD_CTL_1 0x0031 +#define ADV7180_VSYNC_FIELD_CTL_1_NEWAV 0x12 #define ADV7180_REG_MANUAL_WIN_CTL_1 0x003d #define ADV7180_REG_MANUAL_WIN_CTL_2 0x003e #define ADV7180_REG_MANUAL_WIN_CTL_3 0x003f @@ -217,6 +218,7 @@ struct adv7180_state { struct i2c_client *vpp_client; const struct adv7180_chip_info *chip_info; enum v4l2_field field; + bool force_bt656_4; }; #define to_adv7180_sd(_ctrl) (&container_of(_ctrl->handler, \ struct adv7180_state, \ @@ -977,10 +979,26 @@ static int adv7182_init(struct adv7180_state *state) adv7180_write(state, ADV7180_REG_EXTENDED_OUTPUT_CONTROL, 0x57); adv7180_write(state, ADV7180_REG_CTRL_2, 0xc0); } else { - if (state->chip_info->flags & ADV7180_FLAG_V2) - adv7180_write(state, - ADV7180_REG_EXTENDED_OUTPUT_CONTROL, - 0x17); + if (state->chip_info->flags & ADV7180_FLAG_V2) { + if (state->force_bt656_4) { + /* ITU-R BT.656-4 compatible */ + adv7180_write(state, + ADV7180_REG_EXTENDED_OUTPUT_CONTROL, + ADV7180_EXTENDED_OUTPUT_CONTROL_NTSCDIS); + /* Manually set NEWAVMODE */ + adv7180_write(state, + ADV7180_REG_VSYNC_FIELD_CTL_1, + ADV7180_VSYNC_FIELD_CTL_1_NEWAV); + /* Manually set V bit end position in NTSC mode */ + adv7180_write(state, + ADV7180_REG_NTSC_V_BIT_END, + ADV7180_NTSC_V_BIT_END_MANUAL_NVEND); + } else { + adv7180_write(state, + ADV7180_REG_EXTENDED_OUTPUT_CONTROL, + 0x17); + } + } else adv7180_write(state, ADV7180_REG_EXTENDED_OUTPUT_CONTROL, @@ -1329,6 +1347,7 @@ out_unlock: static int adv7180_probe(struct i2c_client *client, const struct i2c_device_id *id) { + struct device_node *np = client->dev.of_node; struct adv7180_state *state; struct v4l2_subdev *sd; int ret; @@ -1361,6 +1380,9 @@ static int adv7180_probe(struct i2c_client *client, return ret; } + if (of_property_read_bool(np, "adv,force-bt656-4")) + state->force_bt656_4 = true; + if (state->chip_info->flags & ADV7180_FLAG_MIPI_CSI2) { state->csi_client = i2c_new_dummy_device(client->adapter, ADV7180_DEFAULT_CSI_I2C_ADDR); |