ARM: mach-shmobile: add HDMI support to the ap4evb board

Support HDMI in 720p mode.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Acked-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

1 files changed, 152 insertions, 2 deletions

diff --git a/arch/arm/mach-shmobile/board-ap4evb.c b/arch/arm/mach-shmobile/board-ap4evb.c
index 968601201fb5..024f8f4c2a33 100644
--- a/arch/arm/mach-shmobile/board-ap4evb.c
+++ b/arch/arm/mach-shmobile/board-ap4evb.c
@@ -44,6 +44,7 @@
 
 #include <sound/sh_fsi.h>
 
+#include <video/sh_mobile_hdmi.h>
 #include <video/sh_mobile_lcdc.h>
 #include <video/sh_mipi_dsi.h>
 
@@ -565,17 +566,152 @@ static struct platform_device fsi_device = {
         },
 };
 
+static struct sh_mobile_lcdc_info sh_mobile_lcdc1_info = {
+        .clock_source = LCDC_CLK_EXTERNAL,
+        .ch[0] = {
+                .chan = LCDC_CHAN_MAINLCD,
+                .bpp = 16,
+                .interface_type = RGB24,
+                .clock_divider = 1,
+                .flags = LCDC_FLAGS_DWPOL,
+                .lcd_cfg = {
+                        .name = "HDMI",
+                        /* So far only 720p is supported */
+                        .xres = 1280,
+                        .yres = 720,
+                        /*
+                         * If left and right margins are not multiples of 8,
+                         * LDHAJR will be adjusted accordingly by the LCDC
+                         * driver. Until we start using EDID, these values
+                         * might have to be adjusted for different monitors.
+                         */
+                        .left_margin = 200,
+                        .right_margin = 88,
+                        .hsync_len = 48,
+                        .upper_margin = 20,
+                        .lower_margin = 5,
+                        .vsync_len = 5,
+                        .pixclock = 13468,
+                        .sync = FB_SYNC_VERT_HIGH_ACT | FB_SYNC_HOR_HIGH_ACT,
+                },
+        }
+};
+
+static struct resource lcdc1_resources[] = {
+        [0] = {
+                .name   = "LCDC1",
+                .start  = 0xfe944000,
+                .end    = 0xfe947fff,
+                .flags  = IORESOURCE_MEM,
+        },
+        [1] = {
+                .start  = intcs_evt2irq(0x17a0),
+                .flags  = IORESOURCE_IRQ,
+        },
+};
+
+static struct platform_device lcdc1_device = {
+        .name           = "sh_mobile_lcdc_fb",
+        .num_resources  = ARRAY_SIZE(lcdc1_resources),
+        .resource       = lcdc1_resources,
+        .id             = 1,
+        .dev    = {
+                .platform_data  = &sh_mobile_lcdc1_info,
+                .coherent_dma_mask = ~0,
+        },
+};
+
+static struct sh_mobile_hdmi_info hdmi_info = {
+        .lcd_chan = &sh_mobile_lcdc1_info.ch[0],
+        .lcd_dev = &lcdc1_device.dev,
+};
+
+static struct resource hdmi_resources[] = {
+        [0] = {
+                .name   = "HDMI",
+                .start  = 0xe6be0000,
+                .end    = 0xe6be00ff,
+                .flags  = IORESOURCE_MEM,
+        },
+        [1] = {
+                /* There's also an HDMI interrupt on INTCS @ 0x18e0 */
+                .start  = evt2irq(0x17e0),
+                .flags  = IORESOURCE_IRQ,
+        },
+};
+
+static struct platform_device hdmi_device = {
+        .name           = "sh-mobile-hdmi",
+        .num_resources  = ARRAY_SIZE(hdmi_resources),
+        .resource       = hdmi_resources,
+        .id             = -1,
+        .dev    = {
+                .platform_data  = &hdmi_info,
+        },
+};
+
 static struct platform_device *ap4evb_devices[] __initdata = {
         &nor_flash_device,
         &smc911x_device,
         &sdhi0_device,
         &sdhi1_device,
         &usb1_host_device,
-        &lcdc_device,
         &fsi_device,
         &sh_mmcif_device
+        &lcdc1_device,
+        &lcdc_device,
+        &hdmi_device,
 };
 
+static int __init hdmi_init_pm_clock(void)
+{
+        struct clk *hdmi_ick = clk_get(&hdmi_device.dev, "ick");
+        int ret;
+        long rate;
+
+        if (IS_ERR(hdmi_ick)) {
+                ret = PTR_ERR(hdmi_ick);
+                pr_err("Cannot get HDMI ICK: %d\n", ret);
+                goto out;
+        }
+
+        ret = clk_set_parent(&pllc2_clk, &dv_clki_div2_clk);
+        if (ret < 0) {
+                pr_err("Cannot set PLLC2 parent: %d, %d users\n", ret, pllc2_clk.usecount);
+                goto out;
+        }
+
+        pr_debug("PLLC2 initial frequency %lu\n", clk_get_rate(&pllc2_clk));
+
+        rate = clk_round_rate(&pllc2_clk, 594000000);
+        if (rate < 0) {
+                pr_err("Cannot get suitable rate: %ld\n", rate);
+                ret = rate;
+                goto out;
+        }
+
+        ret = clk_set_rate(&pllc2_clk, rate);
+        if (ret < 0) {
+                pr_err("Cannot set rate %ld: %d\n", rate, ret);
+                goto out;
+        }
+
+        pr_debug("PLLC2 set frequency %lu\n", rate);
+
+        ret = clk_set_parent(hdmi_ick, &pllc2_clk);
+        if (ret < 0) {
+                pr_err("Cannot set HDMI parent: %d\n", ret);
+                goto out;
+        }
+
+out:
+        if (!IS_ERR(hdmi_ick))
+                clk_put(hdmi_ick);
+        return ret;
+}
+
+device_initcall(hdmi_init_pm_clock);
+
 /*
  * FIXME !!
  *
@@ -689,9 +825,9 @@ static void __init ap4evb_map_io(void)
 
 #define GPIO_PORT9CR    0xE6051009
 #define GPIO_PORT10CR   0xE605100A
-
 static void __init ap4evb_init(void)
 {
+        u32 srcr4;
         struct clk *clk;
 
         sh7372_pinmux_init();
@@ -915,6 +1051,17 @@ static void __init ap4evb_init(void)
 
         sh7372_add_standard_devices();
 
+        /* HDMI */
+        gpio_request(GPIO_FN_HDMI_HPD, NULL);
+        gpio_request(GPIO_FN_HDMI_CEC, NULL);
+
+        /* Reset HDMI, must be held at least one EXTALR (32768Hz) period */
+#define SRCR4 0xe61580bc
+        srcr4 = __raw_readl(SRCR4);
+        __raw_writel(srcr4 | (1 << 13), SRCR4);
+        udelay(50);
+        __raw_writel(srcr4 & ~(1 << 13), SRCR4);
+
         platform_add_devices(ap4evb_devices, ARRAY_SIZE(ap4evb_devices));
 }
 
@@ -922,6 +1069,9 @@ static void __init ap4evb_timer_init(void)
 {
         sh7372_clock_init();
         shmobile_timer.init();
+
+        /* External clock source */
+        clk_set_rate(&dv_clki_clk, 27000000);
 }
 
 static struct sys_timer ap4evb_timer = {