[4/7] drm/vc4: Use drm_mode_vrefresh() in DSI fixup, in case vrefresh is 0.
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Message ID 20170615204130.19255-5-eric@anholt.net
State New
Headers show

Commit Message

Eric Anholt June 15, 2017, 8:41 p.m. UTC
I'm not sure what changed where I started getting vrefresh=0 from the
mode to be fixed up.

Signed-off-by: Eric Anholt <eric@anholt.net>
---
 drivers/gpu/drm/vc4/vc4_dsi.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

Patch
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diff --git a/drivers/gpu/drm/vc4/vc4_dsi.c b/drivers/gpu/drm/vc4/vc4_dsi.c
index 629d372633e6..fca4d7fd677e 100644
--- a/drivers/gpu/drm/vc4/vc4_dsi.c
+++ b/drivers/gpu/drm/vc4/vc4_dsi.c
@@ -866,7 +866,9 @@  static bool vc4_dsi_encoder_mode_fixup(struct drm_encoder *encoder,
 	adjusted_mode->clock = pixel_clock_hz / 1000 + 1;
 
 	/* Given the new pixel clock, adjust HFP to keep vrefresh the same. */
-	adjusted_mode->htotal = pixel_clock_hz / (mode->vrefresh * mode->vtotal);
+	adjusted_mode->htotal = pixel_clock_hz / (drm_mode_vrefresh(mode) *
+						  mode->vtotal);
+
 	adjusted_mode->hsync_end += adjusted_mode->htotal - mode->htotal;
 	adjusted_mode->hsync_start += adjusted_mode->htotal - mode->htotal;