arm: ux500: Add new dsi clocks for mcde

dsi_pll, dsi0clk, dsi1clk and dsixescclk is added to the
clock struct for u8500.

Set rate of dsi_pll, hdmi and tv clk is performed in
init_display_devices in board-mop500-mcde.c

ST-Ericsson ID: 359227, 352847
ST-Ericsson Linux next: NA
ST-Ericsson FOSS-OUT ID: Trivial

Change-Id: I2628212112716df7738e285d3063c6927f71b02e
Signed-off-by: Jimmy Rubin <jimmy.rubin@stericsson.com>
Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/42451
Reviewed-by: QATOOLS
Reviewed-by: QABUILD
Reviewed-by: Jonas ABERG <jonas.aberg@stericsson.com>
Reviewed-by: Per PERSSON <per.xb.persson@stericsson.com>
Reviewed-by: Jayarami REDDY <jayarami.reddy@stericsson.com>

1 files changed, 48 insertions, 0 deletions

diff --git a/arch/arm/mach-ux500/board-mop500-mcde.c b/arch/arm/mach-ux500/board-mop500-mcde.c
index 35f8d417a73..470302b6809 100644
--- a/arch/arm/mach-ux500/board-mop500-mcde.c
+++ b/arch/arm/mach-ux500/board-mop500-mcde.c
@@ -14,6 +14,8 @@
 #include <linux/workqueue.h>
 #include <linux/dispdev.h>
 #include <asm/mach-types.h>
+#include <linux/clk.h>
+#include <mach/devices.h>
 #include <video/av8100.h>
 #include <video/mcde_display.h>
 #include <video/mcde_display-vuib500-dpi.h>
@@ -31,6 +33,11 @@
 #define DSI_UNIT_INTERVAL_1	0x9
 #define DSI_UNIT_INTERVAL_2	0x5
 
+#define DSI_PLL_FREQ_HZ		840320000
+/* Based on PLL DDR Freq at 798,72 MHz */
+#define HDMI_FREQ_HZ		33280000
+#define TV_FREQ_HZ		38400000
+
 #ifdef CONFIG_U8500_TV_OUTPUT_AV8100
 /* The initialization of hdmi disp driver must be delayed in order to
  * ensure that inputclk will be available (needed by hdmi hw) */
@@ -427,6 +434,47 @@ static int __init init_display_devices(void)
 	if (uib_is_stuib())
 		samsung_s6d16d0_display0.synchronized_update = false;
 
+	/* Initialize all needed clocks*/
+	if (!display_initialized_during_boot) {
+		struct clk *clk_dsi_pll;
+		struct clk *clk_hdmi;
+		struct clk *clk_tv;
+
+		/*
+		 * The TV CLK is used as parent for the
+		 * DSI LP clock.
+		 */
+		clk_tv = clk_get(&u8500_mcde_device.dev, "tv");
+		if (TV_FREQ_HZ != clk_round_rate(clk_tv, TV_FREQ_HZ))
+			pr_warning("%s: TV_CLK freq differs %ld\n", __func__,
+					clk_round_rate(clk_tv, TV_FREQ_HZ));
+		clk_set_rate(clk_tv, TV_FREQ_HZ);
+		clk_put(clk_tv);
+
+		/*
+		 * The HDMI CLK is used as parent for the
+		 * DSI HS clock.
+		 */
+		clk_hdmi = clk_get(&u8500_mcde_device.dev, "hdmi");
+		if (HDMI_FREQ_HZ != clk_round_rate(clk_hdmi, HDMI_FREQ_HZ))
+			pr_warning("%s: HDMI freq differs %ld\n", __func__,
+					clk_round_rate(clk_hdmi, HDMI_FREQ_HZ));
+		clk_set_rate(clk_hdmi, HDMI_FREQ_HZ);
+		clk_put(clk_hdmi);
+
+		/*
+		 * The DSI PLL CLK is used as DSI PLL for direct freq for
+		 * link 2. Link 0/1 is then divided with 1/2/4 from this freq.
+		 */
+		clk_dsi_pll = clk_get(&u8500_mcde_device.dev, "dsihs2");
+		if (DSI_PLL_FREQ_HZ != clk_round_rate(clk_dsi_pll,
+							DSI_PLL_FREQ_HZ))
+			pr_warning("%s: DSI_PLL freq differs %ld\n", __func__,
+				clk_round_rate(clk_dsi_pll, DSI_PLL_FREQ_HZ));
+		clk_set_rate(clk_dsi_pll, DSI_PLL_FREQ_HZ);
+		clk_put(clk_dsi_pll);
+	}
+
 	if (uib_is_u8500uib() || uib_is_stuib())
 		/* Samsung display on U8500 and ST UIB */
 		(void)mcde_display_device_register(&samsung_s6d16d0_display0);