OMAPDSS: remove dispc's dependency to VENC/HDMI

DISPC needs to know the clock rate for DIGIT (i.e. TV) channel, and this
clock is provided by either VENC or HDMI modules. Currently DISPC will
call a function in VENC/HDMI, asking what the clock rate is. This means
we have a fixed dependency from DISPC to both VENC and HDMI.

To have a more generic approach, and in particular to allow adding OMAP5
HDMI driver, we need to remove this dependency. This patch makes
VENC/HDMI inform DISPC when the their clock changes, thus reversing the
dependency and removing the issue.

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

1 files changed, 7 insertions, 13 deletions

diff --git a/drivers/video/omap2/dss/dispc.c b/drivers/video/omap2/dss/dispc.c
index 83d7bb9da609..02a7340111df 100644
--- a/drivers/video/omap2/dss/dispc.c
+++ b/drivers/video/omap2/dss/dispc.c
@@ -103,6 +103,7 @@ static struct {
 	int irq;
 
 	unsigned long core_clk_rate;
+	unsigned long tv_pclk_rate;
 
 	u32 fifo_size[DISPC_MAX_NR_FIFOS];
 	/* maps which plane is using a fifo. fifo-id -> plane-id */
@@ -3071,22 +3072,15 @@ unsigned long dispc_mgr_pclk_rate(enum omap_channel channel)
 
 		return r / pcd;
 	} else {
-		enum dss_hdmi_venc_clk_source_select source;
-
-		source = dss_get_hdmi_venc_clk_source();
-
-		switch (source) {
-		case DSS_VENC_TV_CLK:
-			return venc_get_pixel_clock();
-		case DSS_HDMI_M_PCLK:
-			return hdmi_get_pixel_clock();
-		default:
-			BUG();
-			return 0;
-		}
+		return dispc.tv_pclk_rate;
 	}
 }
 
+void dispc_set_tv_pclk(unsigned long pclk)
+{
+	dispc.tv_pclk_rate = pclk;
+}
+
 unsigned long dispc_core_clk_rate(void)
 {
 	return dispc.core_clk_rate;