[PATCH] drm/exynos: Support DP CLKCON register in FIMD driver

[Ajay Kumar]

Add the missing setting for DP CLKCON register.

This register is present on Exynos5 based FIMD controllers,
and needs to be used if we are using DP.

Signed-off-by: Ajay Kumar <ajaykumar.rs at samsung.com>
---
 drivers/gpu/drm/exynos/exynos_drm_fimd.c |    5 +++++
 include/video/samsung_fimd.h             |    4 ++++
 2 files changed, 9 insertions(+)

diff --git a/drivers/gpu/drm/exynos/exynos_drm_fimd.c 
b/drivers/gpu/drm/exynos/exynos_drm_fimd.c
index 33161ad..5d3045d 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_fimd.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_fimd.c
@@ -72,6 +72,7 @@ struct fimd_driver_data {
        unsigned int has_shadowcon:1;
        unsigned int has_clksel:1;
        unsigned int has_limited_fmt:1;
+       unsigned int has_dp_clkcon:1;
 };

 static struct fimd_driver_data s3c64xx_fimd_driver_data = {
@@ -88,6 +89,7 @@ static struct fimd_driver_data exynos4_fimd_driver_data = {
 static struct fimd_driver_data exynos5_fimd_driver_data = {
        .timing_base = 0x20000,
        .has_shadowcon = 1,
+       .has_dp_clkcon = 1,
 };

 struct fimd_win_data {
@@ -331,6 +333,9 @@ static void fimd_commit(struct exynos_drm_manager *mgr)
        if (clkdiv > 1)
                val |= VIDCON0_CLKVAL_F(clkdiv - 1) | VIDCON0_CLKDIR;

+       if (ctx->driver_data->has_dp_clkcon)
+               writel(DP_CLK_ENABLE, ctx->regs + DP_CLKCON);
+
        writel(val, ctx->regs + VIDCON0);
 }

diff --git a/include/video/samsung_fimd.h b/include/video/samsung_fimd.h
index b039320..d8f4b0b 100644
--- a/include/video/samsung_fimd.h
+++ b/include/video/samsung_fimd.h
@@ -435,6 +435,10 @@
 #define BLENDCON_NEW_8BIT_ALPHA_VALUE          (1 << 0)
 #define BLENDCON_NEW_4BIT_ALPHA_VALUE          (0 << 0)

+/* Video clock enable for DP */
+#define DP_CLKCON                              0x27C
+#define DP_CLK_ENABLE                          0x2
+
 /* Notes on per-window bpp settings
  *
  * Value       Win0     Win1     Win2     Win3     Win 4
-- 
1.7.9.5