ARM: mach-shmobile: add framebuffer support for ap4evb

ap4evb uses an LCD, connected to the SoC over the MIPI bus. This patch adds
platform data to configure this display and a static clock activation.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Tested-by: Damian Hobson-Garcia <dhobsong@igel.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

2 files changed, 122 insertions, 0 deletions

diff --git a/arch/arm/mach-shmobile/Kconfig b/arch/arm/mach-shmobile/Kconfig
index a69e033ca045..1de8d171c6e9 100644
--- a/arch/arm/mach-shmobile/Kconfig
+++ b/arch/arm/mach-shmobile/Kconfig
@@ -42,6 +42,7 @@ config MACH_AP4EVB
         bool "AP4EVB board"
         depends on ARCH_SH7372
         select ARCH_REQUIRE_GPIOLIB
+        select SH_LCD_MIPI_DSI
 
 comment "SH-Mobile System Configuration"
 
diff --git a/arch/arm/mach-shmobile/board-ap4evb.c b/arch/arm/mach-shmobile/board-ap4evb.c
index 5342306cd391..353ff8d120b1 100644
--- a/arch/arm/mach-shmobile/board-ap4evb.c
+++ b/arch/arm/mach-shmobile/board-ap4evb.c
@@ -17,6 +17,7 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  */
+#include <linux/clk.h>
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/interrupt.h>
@@ -34,8 +35,14 @@
 #include <linux/input.h>
 #include <linux/input/sh_keysc.h>
 #include <linux/usb/r8a66597.h>
+
+#include <video/sh_mobile_lcdc.h>
+#include <video/sh_mipi_dsi.h>
+
 #include <mach/common.h>
+#include <mach/irqs.h>
 #include <mach/sh7372.h>
+
 #include <asm/mach-types.h>
 #include <asm/mach/arch.h>
 #include <asm/mach/map.h>
@@ -284,12 +291,87 @@ static struct platform_device usb1_host_device = {
         .resource       = usb1_host_resources,
 };
 
+static struct sh_mobile_lcdc_info sh_mobile_lcdc_info = {
+        .clock_source = LCDC_CLK_PERIPHERAL, /* One of interface clocks */
+        .ch[0] = {
+                .chan = LCDC_CHAN_MAINLCD,
+                .bpp = 16,
+                .interface_type = RGB24,
+                .clock_divider = 1,
+                .flags = LCDC_FLAGS_DWPOL,
+                .lcd_cfg = {
+                        .name = "R63302(QHD)",
+                        .xres = 544,
+                        .yres = 961,
+                        .left_margin = 72,
+                        .right_margin = 600,
+                        .hsync_len = 16,
+                        .upper_margin = 8,
+                        .lower_margin = 8,
+                        .vsync_len = 2,
+                        .sync = FB_SYNC_VERT_HIGH_ACT | FB_SYNC_HOR_HIGH_ACT,
+                },
+                .lcd_size_cfg = {
+                        .width = 44,
+                        .height = 79,
+                },
+        }
+};
+
+static struct resource lcdc_resources[] = {
+        [0] = {
+                .name   = "LCDC",
+                .start  = 0xfe940000, /* P4-only space */
+                .end    = 0xfe943fff,
+                .flags  = IORESOURCE_MEM,
+        },
+        [1] = {
+                .start  = intcs_evt2irq(0x580),
+                .flags  = IORESOURCE_IRQ,
+        },
+};
+
+static struct platform_device lcdc_device = {
+        .name           = "sh_mobile_lcdc_fb",
+        .num_resources  = ARRAY_SIZE(lcdc_resources),
+        .resource       = lcdc_resources,
+        .dev    = {
+                .platform_data  = &sh_mobile_lcdc_info,
+                .coherent_dma_mask = ~0,
+        },
+};
+
+static struct resource mipidsi0_resources[] = {
+        [0] = {
+                .start  = 0xffc60000,
+                .end    = 0xffc68fff,
+                .flags  = IORESOURCE_MEM,
+        },
+};
+
+static struct sh_mipi_dsi_info mipidsi0_info = {
+        .data_format    = MIPI_RGB888,
+        .lcd_chan       = &sh_mobile_lcdc_info.ch[0],
+};
+
+static struct platform_device mipidsi0_device = {
+        .name           = "sh-mipi-dsi",
+        .num_resources  = ARRAY_SIZE(mipidsi0_resources),
+        .resource       = mipidsi0_resources,
+        .id             = 0,
+        .dev    = {
+                .platform_data  = &mipidsi0_info,
+        },
+};
+
 static struct platform_device *ap4evb_devices[] __initdata = {
         &nor_flash_device,
         &smc911x_device,
         &keysc_device,
         &sdhi0_device,
         &usb1_host_device,
+        &lcdc_device,
+        &mipidsi0_device,
 };
 
 /* TouchScreen (Needs SW3 set to OFF) */
@@ -333,6 +415,45 @@ static void __init ap4evb_map_io(void)
         shmobile_setup_console();
 }
 
+/* This function will disappear when we switch to (runtime) PM */
+static int __init ap4evb_init_display_clk(void)
+{
+        struct clk *lcdc_clk;
+        struct clk *dsitx_clk;
+        int ret;
+
+        lcdc_clk = clk_get(&lcdc_device.dev, "sh_mobile_lcdc_fb.0");
+        if (IS_ERR(lcdc_clk))
+                return PTR_ERR(lcdc_clk);
+
+        dsitx_clk = clk_get(&mipidsi0_device.dev, "sh-mipi-dsi.0");
+        if (IS_ERR(dsitx_clk)) {
+                ret = PTR_ERR(dsitx_clk);
+                goto eclkdsitxget;
+        }
+
+        ret = clk_enable(lcdc_clk);
+        if (ret < 0)
+                goto eclklcdcon;
+
+        ret = clk_enable(dsitx_clk);
+        if (ret < 0)
+                goto eclkdsitxon;
+
+        return 0;
+
+eclkdsitxon:
+        clk_disable(lcdc_clk);
+eclklcdcon:
+        clk_put(dsitx_clk);
+eclkdsitxget:
+        clk_put(lcdc_clk);
+
+        return ret;
+}
+
+device_initcall(ap4evb_init_display_clk);
+
 static void __init ap4evb_init(void)
 {
         sh7372_pinmux_init();