[Intel-gfx] [PATCH v5 04/17] drm: add helper to validate ycbcr420 modes
Shashank Sharma
shashank.sharma at intel.com
Tue Jul 4 14:11:51 UTC 2017
YCBCR420 modes are supported only on HDMI 2.0 capable sources.
This patch adds a drm helper to validate YCBCR420-only mode
on a particular connector. This function will help pruning
the YCBCR420-only modes from the connector's modelist.
V5: Introduced the patch in series.
Cc: Ville Syrjala <ville.syrjala at linux.intel.com>
Signed-off-by: Shashank Sharma <shashank.sharma at intel.com>
---
drivers/gpu/drm/drm_edid.c | 3 ++-
drivers/gpu/drm/drm_modes.c | 28 ++++++++++++++++++++++++++++
drivers/gpu/drm/drm_probe_helper.c | 4 ++++
include/drm/drm_edid.h | 1 +
include/drm/drm_modes.h | 5 +++++
5 files changed, 40 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
index b879662..ad26c5e 100644
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -2947,10 +2947,11 @@ u8 drm_match_cea_mode(const struct drm_display_mode *to_match)
}
EXPORT_SYMBOL(drm_match_cea_mode);
-static bool drm_valid_cea_vic(u8 vic)
+bool drm_valid_cea_vic(u8 vic)
{
return vic > 0 && vic < ARRAY_SIZE(edid_cea_modes);
}
+EXPORT_SYMBOL(drm_valid_cea_vic);
/**
* drm_get_cea_aspect_ratio - get the picture aspect ratio corresponding to
diff --git a/drivers/gpu/drm/drm_modes.c b/drivers/gpu/drm/drm_modes.c
index f2493b9..3b53c8e3 100644
--- a/drivers/gpu/drm/drm_modes.c
+++ b/drivers/gpu/drm/drm_modes.c
@@ -1083,6 +1083,34 @@ drm_mode_validate_size(const struct drm_display_mode *mode,
}
EXPORT_SYMBOL(drm_mode_validate_size);
+/**
+ * drm_mode_ycbcr420_only - add 'ycbcr420-only' modes only when allowed
+ * @mode: mode to check
+ * @connector: drm connector under action
+ *
+ * This function is a helper which can be used to filter out any YCBCR420
+ * only mode, when the source doesn't support it.
+ *
+ * Returns:
+ * The mode status
+ */
+enum drm_mode_status
+drm_mode_validate_ycbcr420(const struct drm_display_mode *mode,
+ struct drm_connector *connector)
+{
+ u8 vic = drm_match_cea_mode(mode);
+ enum drm_mode_status status = MODE_OK;
+ struct drm_hdmi_info *hdmi = &connector->display_info.hdmi;
+
+ if (drm_valid_cea_vic(vic) && test_bit(vic, hdmi->y420_vdb_modes)) {
+ if (!connector->ycbcr_420_allowed)
+ status = MODE_NO_420;
+ }
+
+ return status;
+}
+EXPORT_SYMBOL(drm_mode_validate_ycbcr420);
+
#define MODE_STATUS(status) [MODE_ ## status + 3] = #status
static const char * const drm_mode_status_names[] = {
diff --git a/drivers/gpu/drm/drm_probe_helper.c b/drivers/gpu/drm/drm_probe_helper.c
index 00e6832..904966c 100644
--- a/drivers/gpu/drm/drm_probe_helper.c
+++ b/drivers/gpu/drm/drm_probe_helper.c
@@ -528,6 +528,10 @@ int drm_helper_probe_single_connector_modes(struct drm_connector *connector,
if (mode->status == MODE_OK)
mode->status = drm_mode_validate_pipeline(mode,
connector);
+
+ if (mode->status == MODE_OK)
+ mode->status = drm_mode_validate_ycbcr420(mode,
+ connector);
}
prune:
diff --git a/include/drm/drm_edid.h b/include/drm/drm_edid.h
index 89c0062..b55b2a7 100644
--- a/include/drm/drm_edid.h
+++ b/include/drm/drm_edid.h
@@ -477,4 +477,5 @@ void drm_edid_get_monitor_name(struct edid *edid, char *name,
struct drm_display_mode *drm_mode_find_dmt(struct drm_device *dev,
int hsize, int vsize, int fresh,
bool rb);
+bool drm_valid_cea_vic(u8 vic);
#endif /* __DRM_EDID_H__ */
diff --git a/include/drm/drm_modes.h b/include/drm/drm_modes.h
index 94ac771..f8a1268 100644
--- a/include/drm/drm_modes.h
+++ b/include/drm/drm_modes.h
@@ -80,6 +80,7 @@ struct videomode;
* @MODE_ONE_SIZE: only one resolution is supported
* @MODE_NO_REDUCED: monitor doesn't accept reduced blanking
* @MODE_NO_STEREO: stereo modes not supported
+ * @MODE_NO_420: ycbcr 420 modes not supported
* @MODE_STALE: mode has become stale
* @MODE_BAD: unspecified reason
* @MODE_ERROR: error condition
@@ -124,6 +125,7 @@ enum drm_mode_status {
MODE_ONE_SIZE,
MODE_NO_REDUCED,
MODE_NO_STEREO,
+ MODE_NO_420,
MODE_STALE = -3,
MODE_BAD = -2,
MODE_ERROR = -1
@@ -496,6 +498,9 @@ bool drm_mode_equal_no_clocks_no_stereo(const struct drm_display_mode *mode1,
enum drm_mode_status drm_mode_validate_basic(const struct drm_display_mode *mode);
enum drm_mode_status drm_mode_validate_size(const struct drm_display_mode *mode,
int maxX, int maxY);
+enum drm_mode_status
+drm_mode_validate_ycbcr420(const struct drm_display_mode *mode,
+ struct drm_connector *connector);
void drm_mode_prune_invalid(struct drm_device *dev,
struct list_head *mode_list, bool verbose);
void drm_mode_sort(struct list_head *mode_list);
--
2.7.4
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