From: Alexander Stein alexander.stein@ew.tq-group.com
[ Upstream commit ee31742bf17636da1304af77b2cb1c29b5dda642 ]
When hactive is not aligned to 8 pixels, it is aligned accordingly and hfront porch needs to be reduced the same amount. Unfortunately the front porch is set to the difference rather than reducing it. There are some Samsung TVs which can't cope with a front porch of instead of 70.
Fixes: 94dfec48fca7 ("drm/imx: Add 8 pixel alignment fix") Signed-off-by: Alexander Stein alexander.stein@ew.tq-group.com Reviewed-by: Philipp Zabel p.zabel@pengutronix.de Link: https://lore.kernel.org/r/20230515072137.116211-1-alexander.stein@ew.tq-grou... [p.zabel@pengutronix.de: Fixed subject] Signed-off-by: Philipp Zabel p.zabel@pengutronix.de Link: https://patchwork.freedesktop.org/patch/msgid/20230515072137.116211-1-alexan... Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/gpu/drm/imx/ipuv3-crtc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/imx/ipuv3-crtc.c b/drivers/gpu/drm/imx/ipuv3-crtc.c index f7863d6dea804..ba5b16618c237 100644 --- a/drivers/gpu/drm/imx/ipuv3-crtc.c +++ b/drivers/gpu/drm/imx/ipuv3-crtc.c @@ -311,7 +311,7 @@ static void ipu_crtc_mode_set_nofb(struct drm_crtc *crtc) dev_warn(ipu_crtc->dev, "8-pixel align hactive %d -> %d\n", sig_cfg.mode.hactive, new_hactive);
- sig_cfg.mode.hfront_porch = new_hactive - sig_cfg.mode.hactive; + sig_cfg.mode.hfront_porch -= new_hactive - sig_cfg.mode.hactive; sig_cfg.mode.hactive = new_hactive; }