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path: root/drivers/video/tegra/dc/dc_priv.h
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Diffstat (limited to 'drivers/video/tegra/dc/dc_priv.h')
-rw-r--r--drivers/video/tegra/dc/dc_priv.h7
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/video/tegra/dc/dc_priv.h b/drivers/video/tegra/dc/dc_priv.h
index 4f53f60f2599..06f2a6061bf6 100644
--- a/drivers/video/tegra/dc/dc_priv.h
+++ b/drivers/video/tegra/dc/dc_priv.h
@@ -32,6 +32,7 @@
#include "../host/host1x/host1x_syncpt.h"
#include <mach/tegra_dc_ext.h>
+#include <mach/clk.h>
#define WIN_IS_TILED(win) ((win)->flags & TEGRA_WIN_FLAG_TILED)
#define WIN_IS_ENABLED(win) ((win)->flags & TEGRA_WIN_FLAG_ENABLED)
@@ -164,6 +165,9 @@ static inline unsigned long tegra_dc_readl(struct tegra_dc *dc,
unsigned long ret;
BUG_ON(!nvhost_module_powered(nvhost_get_host(dc->ndev)->dev));
+ if (!tegra_is_clk_enabled(dc->clk))
+ WARN(1, "DC is clock-gated.\n");
+
ret = readl(dc->base + reg * 4);
trace_printk("readl %p=%#08lx\n", dc->base + reg * 4, ret);
return ret;
@@ -173,6 +177,9 @@ static inline void tegra_dc_writel(struct tegra_dc *dc, unsigned long val,
unsigned long reg)
{
BUG_ON(!nvhost_module_powered(nvhost_get_host(dc->ndev)->dev));
+ if (!tegra_is_clk_enabled(dc->clk))
+ WARN(1, "DC is clock-gated.\n");
+
trace_printk("writel %p=%#08lx\n", dc->base + reg * 4, val);
writel(val, dc->base + reg * 4);
}