[PATCH 5.17 300/772] drm/msm/dpu: adjust display_v_end for eDP and DP

Greg Kroah-Hartman
2022-06-07T21:06:38Z

From: Kuogee Hsieh <quic_khsieh@quicinc.com>

[ Upstream commit e18aeea7f5efb9508722c8c7fd4d32e6f8cdfe50 ]

The “DP timing” requires the active region to be defined in the
bottom-right corner of the frame dimensions which is different
with DSI. Therefore both display_h_end and display_v_end need
to be adjusted accordingly. However current implementation has
only display_h_end adjusted.

Signed-off-by: Kuogee Hsieh <quic_khsieh@quicinc.com>

Fixes: fc3a69ec68d3 ("drm/msm/dpu: intf timing path for displayport")
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Patchwork: https://patchwork.freedesktop.org/patch/476277/
Link: https://lore.kernel.org/r/1645824192-29670-2-git-send-email-quic_khsieh@quicinc.com
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c
index 116e2b5b1a90..284f5610dc35 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c
@@ -148,6 +148,7 @@ static void dpu_hw_intf_setup_timing_engine(struct dpu_hw_intf *ctx,
active_v_end = active_v_start + (p->yres * hsync_period) - 1;

display_v_start += p->hsync_pulse_width + p->h_back_porch;
+ display_v_end -= p->h_front_porch;

active_hctl = (active_h_end << 16) | active_h_start;
display_hctl = active_hctl;
--
2.35.1