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Commit 3cb2f46b authored by Maxime Ripard's avatar Maxime Ripard
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drm/sun4i: tcon: Fix tcon channel 1 backporch calculation 



It seems like what's called a backporch in the datasheet is actually the
backporch plus the sync period. Fix that in our driver.

Acked-by: default avatarChen-Yu Tsai <wens@csie.org>
Signed-off-by: default avatarMaxime Ripard <maxime.ripard@free-electrons.com>
parent b7cb9b91

drivers/gpu/drm/sun4i/sun4i_tcon.c

+2 −2
Original line number Diff line number Diff line
@@ -269,7 +269,7 @@ void sun4i_tcon1_mode_set(struct sun4i_tcon *tcon, 
		     SUN4I_TCON1_BASIC2_Y(mode->crtc_vdisplay));



	/* Set horizontal display timings */

	bp = mode->crtc_htotal - mode->crtc_hsync_end;

	bp = mode->crtc_htotal - mode->crtc_hsync_start;

	DRM_DEBUG_DRIVER("Setting horizontal total %d, backporch %d\n",

			 mode->htotal, bp);

	regmap_write(tcon->regs, SUN4I_TCON1_BASIC3_REG,
@@ -277,7 +277,7 @@ void sun4i_tcon1_mode_set(struct sun4i_tcon *tcon, 
		     SUN4I_TCON1_BASIC3_H_BACKPORCH(bp));



	/* Set vertical display timings */

	bp = mode->crtc_vtotal - mode->crtc_vsync_end;

	bp = mode->crtc_vtotal - mode->crtc_vsync_start;

	DRM_DEBUG_DRIVER("Setting vertical total %d, backporch %d\n",

			 mode->vtotal, bp);

	regmap_write(tcon->regs, SUN4I_TCON1_BASIC4_REG,