From: Stephane Marchesin marcheu@chromium.org
This patch adds support for getting CEA Video ID Code for a given display mode after matching with edid_cea_modes list. Its index in the list added with one, gives the desired code.
This exported function will be used by hdmi drivers for composing AVI info frame data.
Signed-off-by: Stephane Marchesin marcheu@chromium.org Signed-off-by: Rahul Sharma rahul.sharma@samsung.com --- drivers/gpu/drm/drm_edid.c | 20 ++++++++++++++++++++ include/drm/drm_crtc.h | 1 + 2 files changed, 21 insertions(+), 0 deletions(-)
diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c index fadcd44..856dcd9 100644 --- a/drivers/gpu/drm/drm_edid.c +++ b/drivers/gpu/drm/drm_edid.c @@ -1516,6 +1516,26 @@ u8 *drm_find_cea_extension(struct edid *edid) } EXPORT_SYMBOL(drm_find_cea_extension);
+/* + * Looks for a CEA mode matching given drm_display_mode. + * Returns its CEA Video ID code, or 0 if not found. + */ +u8 drm_match_cea_mode(struct drm_display_mode *to_match) +{ + struct drm_display_mode *cea_mode; + u8 mode; + + for (mode = 0; mode < drm_num_cea_modes; mode++) { + cea_mode = (struct drm_display_mode *)&edid_cea_modes[mode]; + + if (drm_mode_equal(to_match, cea_mode)) + return mode + 1; + } + return 0; +} +EXPORT_SYMBOL(drm_match_cea_mode); + + static int do_cea_modes (struct drm_connector *connector, u8 *db, u8 len) { diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h index 92889be..467a327 100644 --- a/include/drm/drm_crtc.h +++ b/include/drm/drm_crtc.h @@ -1038,6 +1038,7 @@ extern int drm_mode_gamma_get_ioctl(struct drm_device *dev, extern int drm_mode_gamma_set_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv); extern u8 *drm_find_cea_extension(struct edid *edid); +extern u8 drm_match_cea_mode(struct drm_display_mode *to_match); extern bool drm_detect_hdmi_monitor(struct edid *edid); extern bool drm_detect_monitor_audio(struct edid *edid); extern int drm_mode_page_flip_ioctl(struct drm_device *dev,