Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...

[~andy/linux] / drivers / gpu / drm / tegra / rgb.c

diff --git a/drivers/gpu/drm/tegra/rgb.c b/drivers/gpu/drm/tegra/rgb.c
index 338f7f6561d701d601a92b2f6362782536d03e2e..0266fb40479eae05f5176e9835d7c2a1ede75519 100644 (file)
--- a/drivers/gpu/drm/tegra/rgb.c
+++ b/drivers/gpu/drm/tegra/rgb.c
@@ -15,6 +15,7 @@
 struct tegra_rgb {
        struct tegra_output output;
        struct tegra_dc *dc;
+       bool enabled;
 
        struct clk *clk_parent;
        struct clk *clk;
@@ -89,6 +90,9 @@ static int tegra_output_rgb_enable(struct tegra_output *output)
        struct tegra_rgb *rgb = to_rgb(output);
        unsigned long value;
 
+       if (rgb->enabled)
+               return 0;
+
        tegra_dc_write_regs(rgb->dc, rgb_enable, ARRAY_SIZE(rgb_enable));
 
        value = DE_SELECT_ACTIVE | DE_CONTROL_NORMAL;
@@ -122,6 +126,8 @@ static int tegra_output_rgb_enable(struct tegra_output *output)
        tegra_dc_writel(rgb->dc, GENERAL_ACT_REQ << 8, DC_CMD_STATE_CONTROL);
        tegra_dc_writel(rgb->dc, GENERAL_ACT_REQ, DC_CMD_STATE_CONTROL);
 
+       rgb->enabled = true;
+
        return 0;
 }
 
@@ -130,6 +136,9 @@ static int tegra_output_rgb_disable(struct tegra_output *output)
        struct tegra_rgb *rgb = to_rgb(output);
        unsigned long value;
 
+       if (!rgb->enabled)
+               return 0;
+
        value = tegra_dc_readl(rgb->dc, DC_CMD_DISPLAY_POWER_CONTROL);
        value &= ~(PW0_ENABLE | PW1_ENABLE | PW2_ENABLE | PW3_ENABLE |
                   PW4_ENABLE | PM0_ENABLE | PM1_ENABLE);
@@ -144,6 +153,8 @@ static int tegra_output_rgb_disable(struct tegra_output *output)
 
        tegra_dc_write_regs(rgb->dc, rgb_disable, ARRAY_SIZE(rgb_disable));
 
+       rgb->enabled = false;
+
        return 0;
 }