drm/exynos/decon5433: fix CMU programming

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>
Signed-off-by: Inki Dae <inki.dae@samsung.com>

diff --git a/drivers/gpu/drm/exynos/exynos5433_drm_decon.c b/drivers/gpu/drm/exynos/exynos5433_drm_decon.c
index d4920091e35cd13575df2a9224cd2789731f3070..3a9aca1c62f90490534932162b997e7cbe362a13 100644 (file)
--- a/drivers/gpu/drm/exynos/exynos5433_drm_decon.c
+++ b/drivers/gpu/drm/exynos/exynos5433_drm_decon.c
@@ -142,10 +142,6 @@ 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);
-
        if (ctx->out_type & (IFTYPE_I80 | I80_HW_TRG))
                decon_setup_trigger(ctx);