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Commit e7bfa5c4 authored by Ville Syrjälä's avatar Ville Syrjälä Committed by Dave Airlie
Browse files

drm/edid: Yank a helpful comment about EST modes from xf86EdidModes.c 



I got very confused when I tried to compare the EST modes with the spec.
Bring over a comment from xf86EdidModes.c that actually describes some
of history where these things came from.

Signed-off-by: default avatarVille Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: default avatarAlex Deucher <alexander.deucher@amd.com>
Signed-off-by: default avatarDave Airlie <airlied@redhat.com>
parent 891a7469

drivers/gpu/drm/drm_edid.c

+9 −0
Original line number Diff line number Diff line
@@ -458,6 +458,15 @@ static const struct drm_display_mode drm_dmt_modes[] = { 
		   DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_NVSYNC) },

};



/*

 * These more or less come from the DMT spec.  The 720x400 modes are

 * inferred from historical 80x25 practice.  The 640x480@67 and 832x624@75

 * modes are old-school Mac modes.  The EDID spec says the 1152x864@75 mode

 * should be 1152x870, again for the Mac, but instead we use the x864 DMT

 * mode.

 *

 * The DMT modes have been fact-checked; the rest are mild guesses.

 */

static const struct drm_display_mode edid_est_modes[] = {

	{ DRM_MODE("800x600", DRM_MODE_TYPE_DRIVER, 40000, 800, 840,

		   968, 1056, 0, 600, 601, 605, 628, 0,