From: Nick Hollinghurst <nick.hollinghurst@xxxxxxxxxxxxxxx>
Add this as a value for enum_drm_connector_tv_mode, represented
by the string "Mono", to generate video with no colour encoding
or bursts. Define it to have no pedestal (since only NTSC-M calls
for a pedestal).
Change default mode creation to acommodate the new tv_mode value
which comprises both 525-line and 625-line formats.
Signed-off-by: Nick Hollinghurst <nick.hollinghurst@xxxxxxxxxxxxxxx>
Signed-off-by: Dave Stevenson <dave.stevenson@xxxxxxxxxxxxxxx>
---
drivers/gpu/drm/drm_connector.c | 7 +++++++
drivers/gpu/drm/drm_modes.c | 5 ++++-
drivers/gpu/drm/drm_probe_helper.c | 5 +++--
include/drm/drm_connector.h | 7 +++++++
4 files changed, 21 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c
index b0516505f7ae..fe05d27f3404 100644
--- a/drivers/gpu/drm/drm_connector.c
+++ b/drivers/gpu/drm/drm_connector.c
@@ -1005,6 +1005,7 @@ static const struct drm_prop_enum_list drm_tv_mode_enum_list[] = {
{ DRM_MODE_TV_MODE_PAL_M, "PAL-M" },
{ DRM_MODE_TV_MODE_PAL_N, "PAL-N" },
{ DRM_MODE_TV_MODE_SECAM, "SECAM" },
+ { DRM_MODE_TV_MODE_MONOCHROME, "Mono" },
};
DRM_ENUM_NAME_FN(drm_get_tv_mode_name, drm_tv_mode_enum_list)
@@ -1697,6 +1698,12 @@ EXPORT_SYMBOL(drm_connector_attach_dp_subconnector_property);
* TV Mode is CCIR System B (aka 625-lines) together with
* the SECAM Color Encoding.
*
+ * Mono:
+ *
+ * Use timings appropriate to the DRM mode, including
+ * equalizing pulses for a 525-line or 625-line mode,
+ * with no pedestal or color encoding.
+ *
* Drivers can set up this property by calling
* drm_mode_create_tv_properties().
*/
diff --git a/drivers/gpu/drm/drm_modes.c b/drivers/gpu/drm/drm_modes.c
index c4f88c3a93b7..d274e7b00b79 100644
--- a/drivers/gpu/drm/drm_modes.c
+++ b/drivers/gpu/drm/drm_modes.c
@@ -530,7 +530,8 @@ static int fill_analog_mode(struct drm_device *dev,
* @interlace: whether to compute an interlaced mode
*
* This function creates a struct drm_display_mode instance suited for
- * an analog TV output, for one of the usual analog TV mode.
+ * an analog TV output, for one of the usual analog TV modes. Where
+ * this is DRM_MODE_TV_MODE_MONOCHROME, a 625-line mode will be created.
*
* Note that @hdisplay is larger than the usual constraints for the PAL
* and NTSC timings, and we'll choose to ignore most timings constraints
@@ -568,6 +569,8 @@ struct drm_display_mode *drm_analog_tv_mode(struct drm_device *dev,
case DRM_MODE_TV_MODE_PAL_N:
fallthrough;
case DRM_MODE_TV_MODE_SECAM:
+ fallthrough;
+ case DRM_MODE_TV_MODE_MONOCHROME:
analog = DRM_MODE_ANALOG_PAL;
break;
diff --git a/drivers/gpu/drm/drm_probe_helper.c b/drivers/gpu/drm/drm_probe_helper.c
index d1e1ade66f81..9254dc2af873 100644
--- a/drivers/gpu/drm/drm_probe_helper.c
+++ b/drivers/gpu/drm/drm_probe_helper.c
@@ -1211,8 +1211,9 @@ int drm_connector_helper_tv_get_modes(struct drm_connector *connector)
for (i = 0; i < tv_mode_property->num_values; i++)
supported_tv_modes |= BIT(tv_mode_property->values[i]);
- if ((supported_tv_modes & ntsc_modes) &&
- (supported_tv_modes & pal_modes)) {
+ if (((supported_tv_modes & ntsc_modes) &&
+ (supported_tv_modes & pal_modes)) ||
+ (supported_tv_modes & BIT(DRM_MODE_TV_MODE_MONOCHROME))) {
uint64_t default_mode;
if (drm_object_property_get_default_value(&connector->base,
diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h
index fe88d7fc6b8f..90fd0ea0ca09 100644
--- a/include/drm/drm_connector.h
+++ b/include/drm/drm_connector.h
@@ -200,6 +200,13 @@ enum drm_connector_tv_mode {
*/
DRM_MODE_TV_MODE_SECAM,
+ /**
+ * @DRM_MODE_TV_MODE_MONOCHROME: Use timings appropriate to
+ * the DRM mode, including equalizing pulses for a 525-line
+ * or 625-line mode, with no pedestal or color encoding.
+ */
+ DRM_MODE_TV_MODE_MONOCHROME,
+
/**
* @DRM_MODE_TV_MODE_MAX: Number of analog TV output modes.
*
--
2.25.1
