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authorShashank Sharma <shashank.sharma@intel.com>2017-07-13 21:03:14 +0530
committerVille Syrjälä <ville.syrjala@linux.intel.com>2017-07-14 21:23:54 +0300
commit2570fe2586254ff174c2ba5a20dabbde707dbb9b (patch)
tree444a8e531af25fa17f481868a17e9d9f567c2b24 /drivers/gpu/drm/drm_modes.c
parente6a9a2c3dc4377f62650faf1c978d073c55d62ec (diff)
drm: add helper functions for YCBCR420 handling
This patch adds helper functions for YCBCR 420 handling. These functions do: - check if a given video mode is YCBCR 420 only mode. - check if a given video mode is YCBCR 420 also mode. V2: Added YCBCR functions as helpers in DRM layer, instead of keeping it in I915 layer. V3: Added handling for YCBCR-420 only modes too. V4: EXPORT_SYMBOL(drm_find_hdmi_output_type) V5: Addressed review comments from Danvet: - %s/drm_find_hdmi_output_type/drm_display_info_hdmi_output_type - %s/drm_can_support_ycbcr_output/drm_display_supports_ycbcr_output - %s/drm_can_support_this_ycbcr_output/ drm_display_supports_this_ycbcr_output - pass drm_display_info instead of drm_connector for consistency - For drm_get_highest_quality_ycbcr_supported doc, move the variable description above, and then the function description. V6: Add only YCBCR420 helpers (Ville) V7: Addressed review comments from Ville - Remove cea_vic_valid() check. - Fix indentation. - Make input parameters to helpers, const. Cc: Ville Syrjala <ville.syrjala@linux.intel.com> Cc: Jose Abreu <Jose.Abreu@synopsys.com> Cc: Daniel Vetter <daniel.vetter@intel.com> Signed-off-by: Shashank Sharma <shashank.sharma@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1499960000-9232-9-git-send-email-shashank.sharma@intel.com [vsyrjala: Fix sparse indentation warn] Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Diffstat (limited to 'drivers/gpu/drm/drm_modes.c')
-rw-r--r--drivers/gpu/drm/drm_modes.c58
1 files changed, 58 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_modes.c b/drivers/gpu/drm/drm_modes.c
index 35630b80cd48..c1aec532281c 100644
--- a/drivers/gpu/drm/drm_modes.c
+++ b/drivers/gpu/drm/drm_modes.c
@@ -1605,3 +1605,61 @@ int drm_mode_convert_umode(struct drm_display_mode *out,
out:
return ret;
}
+
+/**
+ * drm_mode_is_420_only - if a given videomode can be only supported in YCBCR420
+ * output format
+ *
+ * @connector: drm connector under action.
+ * @mode: video mode to be tested.
+ *
+ * Returns:
+ * true if the mode can be supported in YCBCR420 format
+ * false if not.
+ */
+bool drm_mode_is_420_only(const struct drm_display_info *display,
+ const struct drm_display_mode *mode)
+{
+ u8 vic = drm_match_cea_mode(mode);
+
+ return test_bit(vic, display->hdmi.y420_vdb_modes);
+}
+EXPORT_SYMBOL(drm_mode_is_420_only);
+
+/**
+ * drm_mode_is_420_also - if a given videomode can be supported in YCBCR420
+ * output format also (along with RGB/YCBCR444/422)
+ *
+ * @display: display under action.
+ * @mode: video mode to be tested.
+ *
+ * Returns:
+ * true if the mode can be support YCBCR420 format
+ * false if not.
+ */
+bool drm_mode_is_420_also(const struct drm_display_info *display,
+ const struct drm_display_mode *mode)
+{
+ u8 vic = drm_match_cea_mode(mode);
+
+ return test_bit(vic, display->hdmi.y420_cmdb_modes);
+}
+EXPORT_SYMBOL(drm_mode_is_420_also);
+/**
+ * drm_mode_is_420 - if a given videomode can be supported in YCBCR420
+ * output format
+ *
+ * @display: display under action.
+ * @mode: video mode to be tested.
+ *
+ * Returns:
+ * true if the mode can be supported in YCBCR420 format
+ * false if not.
+ */
+bool drm_mode_is_420(const struct drm_display_info *display,
+ const struct drm_display_mode *mode)
+{
+ return drm_mode_is_420_only(display, mode) ||
+ drm_mode_is_420_also(display, mode);
+}
+EXPORT_SYMBOL(drm_mode_is_420);