It seems like what's called a backporch in the datasheet is actually the
backporch plus the sync period. Fix that in our driver.
Signed-off-by: Maxime Ripard <maxime.rip...@free-electrons.com>
---
drivers/gpu/drm/sun4i/sun4i_tcon.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/sun4i/sun4i_tcon.c
b/drivers/gpu/drm/sun4i/sun4i_tcon.c
index 93249c5ab1e4..e44217fb4f6f 100644
--- a/drivers/gpu/drm/sun4i/sun4i_tcon.c
+++ b/drivers/gpu/drm/sun4i/sun4i_tcon.c
@@ -240,15 +240,14 @@ void sun4i_tcon1_mode_set(struct sun4i_tcon *tcon, struct
drm_encoder *encoder,
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,
SUN4I_TCON1_BASIC3_H_TOTAL(mode->crtc_htotal) |
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,
--
git-series 0.8.11
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