From 3cb2f46b3da4c45342414c63cd465de483cb102a Mon Sep 17 00:00:00 2001 From: Maxime Ripard Date: Sat, 27 May 2017 18:09:29 +0200 Subject: [PATCH] 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: Chen-Yu Tsai Signed-off-by: Maxime Ripard --- drivers/gpu/drm/sun4i/sun4i_tcon.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/sun4i/sun4i_tcon.c b/drivers/gpu/drm/sun4i/sun4i_tcon.c index 28da61ac9bab..6993ef3888dd 100644 --- a/drivers/gpu/drm/sun4i/sun4i_tcon.c +++ b/drivers/gpu/drm/sun4i/sun4i_tcon.c @@ -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, -- 2.20.1