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Commit a4799037 authored by Stephane Marchesin's avatar Stephane Marchesin Committed by Dave Airlie
Browse files

drm: get cea video id code for a given display mode 



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: default avatarStephane Marchesin <marcheu@chromium.org>
Signed-off-by: default avatarRahul Sharma <rahul.sharma@samsung.com>
Signed-off-by: default avatarDave Airlie <airlied@redhat.com>
parent 96081cdf

drivers/gpu/drm/drm_edid.c

+20 −0
Original line number Diff line number Diff line
@@ -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)

{

include/drm/drm_crtc.h

+1 −0
Original line number Diff line number Diff line
@@ -1037,6 +1037,7 @@ 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,