Specification advises to clear vsync indicator before configuring vsync.
Signed-off-by: Andrzej Hajda <[email protected]>
---
drivers/gpu/drm/exynos/exynos_mixer.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/exynos/exynos_mixer.c
b/drivers/gpu/drm/exynos/exynos_mixer.c
index 0686484..b338a10 100644
--- a/drivers/gpu/drm/exynos/exynos_mixer.c
+++ b/drivers/gpu/drm/exynos/exynos_mixer.c
@@ -905,8 +905,8 @@ static int mixer_enable_vblank(struct exynos_drm_crtc *crtc)
}
/* enable vsync interrupt */
- mixer_reg_writemask(res, MXR_INT_EN, MXR_INT_EN_VSYNC,
- MXR_INT_EN_VSYNC);
+ mixer_reg_writemask(res, MXR_INT_STATUS, ~0, MXR_INT_CLEAR_VSYNC);
+ mixer_reg_writemask(res, MXR_INT_EN, ~0, MXR_INT_EN_VSYNC);
return 0;
}
@@ -917,6 +917,7 @@ static void mixer_disable_vblank(struct exynos_drm_crtc
*crtc)
struct mixer_resources *res = &mixer_ctx->mixer_res;
/* disable vsync interrupt */
+ mixer_reg_writemask(res, MXR_INT_STATUS, ~0, MXR_INT_CLEAR_VSYNC);
mixer_reg_writemask(res, MXR_INT_EN, 0, MXR_INT_EN_VSYNC);
}
@@ -1045,6 +1046,8 @@ static void mixer_enable(struct exynos_drm_crtc *crtc)
mixer_reg_writemask(res, MXR_STATUS, ~0, MXR_STATUS_SOFT_RESET);
+ if (ctx->int_en & MXR_INT_EN_VSYNC)
+ mixer_reg_writemask(res, MXR_INT_STATUS, ~0,
MXR_INT_CLEAR_VSYNC);
mixer_reg_write(res, MXR_INT_EN, ctx->int_en);
mixer_win_reset(ctx);
}
--
1.9.1
--
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