[PATCH v2 7/8] drm/exynos: fixed unnormal interrupt in m2m operation.

[Eunchul Kim]

From: Jinyoung Jeon <jy0.jeon at samsung.com>

This patch fixed unnormal interrupt at m2m operation sometimes.
m2m operation called s/w reset during every frame.
but m2m occured interrupt after s/w reset sometimes.
so, we cleared dma operation and capture operation.

Signed-off-by: Jinyoung Jeon <jy0.jeon at samsung.com>
Signed-off-by: Eunchul Kim <chulspro.kim at samsung.com>
---
 drivers/gpu/drm/exynos/exynos_drm_fimc.c |   13 +++++++++++++
 1 files changed, 13 insertions(+), 0 deletions(-)

diff --git a/drivers/gpu/drm/exynos/exynos_drm_fimc.c b/drivers/gpu/drm/exynos/exynos_drm_fimc.c
index a99ceef..9f52b7f 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_fimc.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_fimc.c
@@ -169,10 +169,23 @@ static void fimc_sw_reset(struct fimc_context *ctx)
 
 	DRM_DEBUG_KMS("%s\n", __func__);
 
+	/* stop dma operation */
+	cfg = fimc_read(EXYNOS_CISTATUS);
+	if (EXYNOS_CISTATUS_GET_ENVID_STATUS(cfg)) {
+		cfg = fimc_read(EXYNOS_MSCTRL);
+		cfg &= ~EXYNOS_MSCTRL_ENVID;
+		fimc_write(cfg, EXYNOS_MSCTRL);
+	}
+
 	cfg = fimc_read(EXYNOS_CISRCFMT);
 	cfg |= EXYNOS_CISRCFMT_ITU601_8BIT;
 	fimc_write(cfg, EXYNOS_CISRCFMT);
 
+	/* disable image capture */
+	cfg = fimc_read(EXYNOS_CIIMGCPT);
+	cfg &= ~(EXYNOS_CIIMGCPT_IMGCPTEN_SC | EXYNOS_CIIMGCPT_IMGCPTEN);
+	fimc_write(cfg, EXYNOS_CIIMGCPT);
+
 	/* s/w reset */
 	cfg = fimc_read(EXYNOS_CIGCTRL);
 	cfg |= (EXYNOS_CIGCTRL_SWRST);
-- 
1.7.0.4