diff --git a/drivers/gpu/drm/tegra/dc.c b/drivers/gpu/drm/tegra/dc.c
index 3475bd9f9719a3385e22133cb3bd6e2867d3592e..656b2e3334a621109426806043032ae3422d9631 100644
--- a/drivers/gpu/drm/tegra/dc.c
+++ b/drivers/gpu/drm/tegra/dc.c
@@ -171,8 +171,6 @@ static int tegra_crtc_mode_set(struct drm_crtc *crtc,
return err;
}
- mutex_lock(&dc->regs_mutex);
-
/* program display mode */
tegra_dc_set_timings(dc, mode);
@@ -270,8 +268,6 @@ static int tegra_crtc_mode_set(struct drm_crtc *crtc,
tegra_dc_writel(dc, 0xff00, DC_WIN_BLEND_NOKEY);
tegra_dc_writel(dc, 0xff00, DC_WIN_BLEND_1WIN);
- mutex_unlock(&dc->regs_mutex);
-
return 0;
}
@@ -290,8 +286,6 @@ static void tegra_crtc_prepare(struct drm_crtc *crtc)
else
syncpt = SYNCPT_VBLANK0;
- mutex_lock(&dc->regs_mutex);
-
/* initialize display controller */
tegra_dc_writel(dc, 0x00000100, DC_CMD_GENERAL_INCR_SYNCPT_CNTRL);
tegra_dc_writel(dc, 0x100 | syncpt, DC_CMD_CONT_SYNCPT_VSYNC);
@@ -325,8 +319,6 @@ static void tegra_crtc_prepare(struct drm_crtc *crtc)
value = VBLANK_INT | WIN_A_UF_INT | WIN_B_UF_INT | WIN_C_UF_INT;
tegra_dc_writel(dc, value, DC_CMD_INT_ENABLE);
-
- mutex_unlock(&dc->regs_mutex);
}
static void tegra_crtc_commit(struct drm_crtc *crtc)
@@ -337,8 +329,6 @@ static void tegra_crtc_commit(struct drm_crtc *crtc)
update_mask = GENERAL_ACT_REQ | WIN_A_ACT_REQ;
- mutex_lock(&dc->regs_mutex);
-
tegra_dc_writel(dc, update_mask << 8, DC_CMD_STATE_CONTROL);
value = tegra_dc_readl(dc, DC_CMD_INT_ENABLE);
@@ -350,8 +340,6 @@ static void tegra_crtc_commit(struct drm_crtc *crtc)
tegra_dc_writel(dc, value, DC_CMD_INT_MASK);
tegra_dc_writel(dc, update_mask, DC_CMD_STATE_CONTROL);
-
- mutex_unlock(&dc->regs_mutex);
}
static void tegra_crtc_load_lut(struct drm_crtc *crtc)
@@ -758,7 +746,6 @@ static int tegra_dc_probe(struct platform_device *pdev)
return -ENOMEM;
INIT_LIST_HEAD(&dc->list);
- mutex_init(&dc->regs_mutex);
dc->dev = &pdev->dev;
dc->clk = devm_clk_get(&pdev->dev, NULL);
diff --git a/drivers/gpu/drm/tegra/drm.h b/drivers/gpu/drm/tegra/drm.h
index 71e61f2b07417f4d0e04bfb7c94ecc06bf0ca9a8..741b5dc2742cc7498fb3f763c273da81885222ba 100644
--- a/drivers/gpu/drm/tegra/drm.h
+++ b/drivers/gpu/drm/tegra/drm.h
@@ -84,7 +84,6 @@ struct tegra_dc {
struct clk *clk;
- struct mutex regs_mutex;
void __iomem *regs;
int irq;