OMAP: DSS2: Add FEAT_VENC_REQUIRES_TV_DAC_CLK

OMAP3430 requires an 96MHz clock to VENC's DAC, but no other OMAP needs
it.

Add a new feature, FEAT_VENC_REQUIRES_TV_DAC_CLK, which tells if the
clock is needed on this platform, and use that feature in venc.c to
decide if the clock needs enabling.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

3 files changed, 13 insertions, 7 deletions

diff --git a/drivers/video/omap2/dss/dss_features.c b/drivers/video/omap2/dss/dss_features.c
index 1c18888e5df..a588380eec2 100644
--- a/drivers/video/omap2/dss/dss_features.c
+++ b/drivers/video/omap2/dss/dss_features.c
@@ -286,7 +286,8 @@ static const struct omap_dss_features omap3430_dss_features = {
                 FEAT_LCDENABLESIGNAL | FEAT_PCKFREEENABLE |
                 FEAT_FUNCGATED | FEAT_ROWREPEATENABLE |
                 FEAT_LINEBUFFERSPLIT | FEAT_RESIZECONF |
-                FEAT_DSI_PLL_FREQSEL | FEAT_DSI_REVERSE_TXCLKESC,
+                FEAT_DSI_PLL_FREQSEL | FEAT_DSI_REVERSE_TXCLKESC |
+                FEAT_VENC_REQUIRES_TV_DAC_CLK,
 
         .num_mgrs = 2,
         .num_ovls = 3,
diff --git a/drivers/video/omap2/dss/dss_features.h b/drivers/video/omap2/dss/dss_features.h
index 07b346f7d91..3058e24946a 100644
--- a/drivers/video/omap2/dss/dss_features.h
+++ b/drivers/video/omap2/dss/dss_features.h
@@ -51,6 +51,7 @@ enum dss_feat_id {
         FEAT_HDMI_CTS_SWMODE            = 1 << 19,
         FEAT_HANDLE_UV_SEPARATE         = 1 << 20,
         FEAT_ATTR2                      = 1 << 21,
+        FEAT_VENC_REQUIRES_TV_DAC_CLK   = 1 << 22,
 };
 
 /* DSS register field id */
diff --git a/drivers/video/omap2/dss/venc.c b/drivers/video/omap2/dss/venc.c
index e7485fc41fc..bf0431f788c 100644
--- a/drivers/video/omap2/dss/venc.c
+++ b/drivers/video/omap2/dss/venc.c
@@ -38,6 +38,7 @@
 #include <plat/cpu.h>
 
 #include "dss.h"
+#include "dss_features.h"
 
 /* Venc registers */
 #define VENC_REV_ID                             0x00
@@ -382,12 +383,15 @@ static void venc_reset(void)
 
 static void venc_enable_clocks(int enable)
 {
-        if (enable)
-                dss_clk_enable(DSS_CLK_ICK | DSS_CLK_FCK | DSS_CLK_TVFCK |
-                                DSS_CLK_VIDFCK);
-        else
-                dss_clk_disable(DSS_CLK_ICK | DSS_CLK_FCK | DSS_CLK_TVFCK |
-                                DSS_CLK_VIDFCK);
+        if (enable) {
+                dss_clk_enable(DSS_CLK_ICK | DSS_CLK_FCK | DSS_CLK_TVFCK);
+                if (dss_has_feature(FEAT_VENC_REQUIRES_TV_DAC_CLK))
+                        dss_clk_enable(DSS_CLK_VIDFCK);
+        } else {
+                dss_clk_disable(DSS_CLK_ICK | DSS_CLK_FCK | DSS_CLK_TVFCK);
+                if (dss_has_feature(FEAT_VENC_REQUIRES_TV_DAC_CLK))
+                        dss_clk_disable(DSS_CLK_VIDFCK);
+        }
 }
 
 static const struct venc_config *venc_timings_to_config(