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drm: rcar-du: Use the VBK interrupt for vblank events

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When implementing support for interlaced modes, the driver switched from
reporting vblank events on the vertical blanking (VBK) interrupt to the
frame end interrupt (FRM). This incorrectly divided the reported refresh
rate by two. Fix it by moving back to the VBK interrupt.

Fixes: 906eff7fca ("drm: rcar-du: Implement support for interlaced modes")
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
This commit is contained in:
Laurent Pinchart 2017-07-10 23:46:39 +03:00
parent 776c5d000b
commit cbbb90b0c0
1 changed files with 1 additions and 1 deletions
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drivers/gpu/drm/rcar-du/rcar_du_crtc.c
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@ -698,7 +698,7 @@ static irqreturn_t rcar_du_crtc_irq(int irq, void *arg)
status = rcar_du_crtc_read(rcrtc, DSSR);
rcar_du_crtc_write(rcrtc, DSRCR, status & DSRCR_MASK);
if (status & DSSR_FRM) {
if (status & DSSR_VBK) {
drm_crtc_handle_vblank(&rcrtc->crtc);
if (rcdu->info->gen < 3)