drm/bridge: lt9611: simplify video timings programming

Inline calculated values to simplify the calculation in
lt9611_mipi_video_setup().

Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20230118081658.2198520-11-dmitry.baryshkov@linaro.org

diff --git a/drivers/gpu/drm/bridge/lontium-lt9611.c b/drivers/gpu/drm/bridge/lontium-lt9611.c
index 1ea6436..cd98090 100644 (file)
--- a/drivers/gpu/drm/bridge/lontium-lt9611.c
+++ b/drivers/gpu/drm/bridge/lontium-lt9611.c
@@ -155,12 +155,12 @@ static void lt9611_mipi_video_setup(struct lt9611 *lt9611,
        hactive = mode->hdisplay;
        hsync_len = mode->hsync_end - mode->hsync_start;
        hfront_porch = mode->hsync_start - mode->hdisplay;
-       hsync_porch = hsync_len + mode->htotal - mode->hsync_end;
+       hsync_porch = mode->htotal - mode->hsync_start;
 
        vactive = mode->vdisplay;
        vsync_len = mode->vsync_end - mode->vsync_start;
        vfront_porch = mode->vsync_start - mode->vdisplay;
-       vsync_porch = vsync_len + mode->vtotal - mode->vsync_end;
+       vsync_porch = mode->vtotal - mode->vsync_start;
 
        regmap_write(lt9611->regmap, 0x830d, (u8)(v_total / 256));
        regmap_write(lt9611->regmap, 0x830e, (u8)(v_total % 256));