From fc073248ceb56af8cedebff36bf1cdc5da3c6847 Mon Sep 17 00:00:00 2001 From: Andrzej Hajda Date: Thu, 9 Jul 2015 08:25:40 +0200 Subject: [PATCH] drm/exynos/mixer: correct vsync configuration sequence Specification advises to clear vsync indicator before configuring vsync. Signed-off-by: Andrzej Hajda Reviewed-by: Joonyoung Shim Signed-off-by: Inki Dae --- 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 25f0aac01a89..923aa75143bf 100644 --- a/drivers/gpu/drm/exynos/exynos_mixer.c +++ b/drivers/gpu/drm/exynos/exynos_mixer.c @@ -906,8 +906,8 @@ 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; } @@ -918,6 +918,7 @@ 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); } @@ -1046,6 +1047,8 @@ 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); } -- 2.20.1