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Commit b58db2c6 authored by Adam Jackson's avatar Adam Jackson Committed by Dave Airlie
Browse files

drm/edid: Fix interlaced detailed timings to be frame size, not field. 

cf. https://bugzilla.redhat.com/show_bug.cgi?id=533561



Signed-off-by: default avatarAdam Jackson <ajax@redhat.com>
Signed-off-by: default avatarDave Airlie <airlied@redhat.com>
parent f2d12b8e

drivers/gpu/drm/drm_edid.c

+45 −2
Original line number Diff line number Diff line
@@ -598,6 +598,50 @@ struct drm_display_mode *drm_mode_std(struct drm_device *dev, 
	return mode;

}



/*

 * EDID is delightfully ambiguous about how interlaced modes are to be

 * encoded.  Our internal representation is of frame height, but some

 * HDTV detailed timings are encoded as field height.

 *

 * The format list here is from CEA, in frame size.  Technically we

 * should be checking refresh rate too.  Whatever.

 */

static void

drm_mode_do_interlace_quirk(struct drm_display_mode *mode,

			    struct detailed_pixel_timing *pt)

{

	int i;

	static const struct {

		int w, h;

	} cea_interlaced[] = {

		{ 1920, 1080 },

		{  720,  480 },

		{ 1440,  480 },

		{ 2880,  480 },

		{  720,  576 },

		{ 1440,  576 },

		{ 2880,  576 },

	};

	static const int n_sizes =

		sizeof(cea_interlaced)/sizeof(cea_interlaced[0]);



	if (!(pt->misc & DRM_EDID_PT_INTERLACED))

		return;



	for (i = 0; i < n_sizes; i++) {

		if ((mode->hdisplay == cea_interlaced[i].w) &&

		    (mode->vdisplay == cea_interlaced[i].h / 2)) {

			mode->vdisplay *= 2;

			mode->vsync_start *= 2;

			mode->vsync_end *= 2;

			mode->vtotal *= 2;

			mode->vtotal |= 1;

		}

	}



	mode->flags |= DRM_MODE_FLAG_INTERLACE;

}



/**

 * drm_mode_detailed - create a new mode from an EDID detailed timing section

 * @dev: DRM device (needed to create new mode)
@@ -680,8 +724,7 @@ static struct drm_display_mode *drm_mode_detailed(struct drm_device *dev, 


	drm_mode_set_name(mode);



	if (pt->misc & DRM_EDID_PT_INTERLACED)

		mode->flags |= DRM_MODE_FLAG_INTERLACE;

	drm_mode_do_interlace_quirk(mode, pt);



	if (quirks & EDID_QUIRK_DETAILED_SYNC_PP) {

		pt->misc |= DRM_EDID_PT_HSYNC_POSITIVE | DRM_EDID_PT_VSYNC_POSITIVE;