diff mbox series

[v2,6/9] drm/sun4i: dsi: Fix DRQ calculation

Message ID e858ff6509e0d3f657fd9229b28f4ac177a04a76.1549619502.git-series.maxime.ripard@bootlin.com (mailing list archive)
State New, archived
Headers show
Series drm/sun4i: dsi: Add burst mode support | expand

Commit Message

Maxime Ripard Feb. 8, 2019, 9:53 a.m. UTC 
The DRQ calculation code in the Allwinner BSP uses the vertical front
porch value as the condition, but we're using the video back porch.

Since I always confuse the two, and I'm the original author of that code, I
guess I deserved a brown paper bag.

Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
---
 drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c b/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c
index 2518a0d7567c..8e6392831e9d 100644
--- a/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c
+++ b/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c
@@ -372,9 +372,9 @@  static void sun6i_dsi_setup_burst(struct sun6i_dsi *dsi,
 	struct mipi_dsi_device *device = dsi->device;
 	u32 val = 0;
 
-	if ((mode->hsync_end - mode->hdisplay) > 20) {
+	if ((mode->hsync_start - mode->hdisplay) > 20) {
 		/* Maaaaaagic */
-		u16 drq = (mode->hsync_end - mode->hdisplay) - 20;
+		u16 drq = (mode->hsync_start - mode->hdisplay) - 20;
 
 		drq *= mipi_dsi_pixel_format_to_bpp(device->format);
 		drq /= 32;