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[2/3] drm/exynos/decon5433: fix CMU programming

Message ID 1484662520-17012-3-git-send-email-a.hajda@samsung.com (mailing list archive)
State New, archived
Headers show

Commit Message

Andrzej Hajda Jan. 17, 2017, 2:15 p.m. UTC 
DECON_CMU register has reserved bits which should not be zeroed, otherwise
IP can behave strangely and cause IOMMU faults.

Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
---
 drivers/gpu/drm/exynos/exynos5433_drm_decon.c | 4 ----
 1 file changed, 4 deletions(-)
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Patch

diff --git a/drivers/gpu/drm/exynos/exynos5433_drm_decon.c b/drivers/gpu/drm/exynos/exynos5433_drm_decon.c
index 6fd2b11..9f4d60d 100644
--- a/drivers/gpu/drm/exynos/exynos5433_drm_decon.c
+++ b/drivers/gpu/drm/exynos/exynos5433_drm_decon.c
@@ -158,10 +158,6 @@  static void decon_commit(struct exynos_drm_crtc *crtc)
 		m->crtc_vsync_end = m->crtc_vsync_start + 1;
 	}
 
-	/* enable clock gate */
-	val = CMU_CLKGAGE_MODE_SFR_F | CMU_CLKGAGE_MODE_MEM_F;
-	writel(val, ctx->addr + DECON_CMU);
-
 	decon_setup_trigger(ctx);
 
 	/* lcd on and use command if */