From: Laurent Pinchart laurent.pinchart+renesas@ideasonboard.com
This patch has been added to the 4.1 stable tree. If you have any objections, please let us know.
===============
[ Upstream commit cbbb90b0c084d7dfb2ed8e3fecf8df200fbdd2a0 ]
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: 906eff7fcada ("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 Signed-off-by: Sasha Levin alexander.levin@microsoft.com --- drivers/gpu/drm/rcar-du/rcar_du_crtc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_crtc.c b/drivers/gpu/drm/rcar-du/rcar_du_crtc.c index 824c835330df..de155c77f739 100644 --- a/drivers/gpu/drm/rcar-du/rcar_du_crtc.c +++ b/drivers/gpu/drm/rcar-du/rcar_du_crtc.c @@ -511,7 +511,7 @@ 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_handle_vblank(rcrtc->crtc.dev, rcrtc->index); rcar_du_crtc_finish_page_flip(rcrtc); ret = IRQ_HANDLED;