[media] i.MX27: Visstrim_M10: Add support for deinterlacing driver

Visstrim_M10 have a tvp5150 whose video output must be deinterlaced.
The new mem2mem deinterlacing driver is very useful for that purpose.

Signed-off-by: Javier Martin <javier.martin@vista-silicon.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

diff --git a/arch/arm/mach-imx/mach-imx27_visstrim_m10.c b/arch/arm/mach-imx/mach-imx27_visstrim_m10.c
index 3194362..821d6aa 100644 (file)
--- a/arch/arm/mach-imx/mach-imx27_visstrim_m10.c
+++ b/arch/arm/mach-imx/mach-imx27_visstrim_m10.c
@@ -233,7 +233,7 @@ static void __init visstrim_camera_init(void)
 static void __init visstrim_reserve(void)
 {
        /* reserve 4 MiB for mx2-camera */
-       mx2_camera_base = arm_memblock_steal(2 * MX2_CAMERA_BUF_SIZE,
+       mx2_camera_base = arm_memblock_steal(3 * MX2_CAMERA_BUF_SIZE,
                        MX2_CAMERA_BUF_SIZE);
 }
 
@@ -420,6 +420,30 @@ static void __init visstrim_coda_init(void)
                return;
 }
 
+/* DMA deinterlace */
+static struct platform_device visstrim_deinterlace = {
+       .name = "m2m-deinterlace",
+       .id = 0,
+};
+
+static void __init visstrim_deinterlace_init(void)
+{
+       int ret = -ENOMEM;
+       struct platform_device *pdev = &visstrim_deinterlace;
+       int dma;
+
+       ret = platform_device_register(pdev);
+
+       dma = dma_declare_coherent_memory(&pdev->dev,
+                                         mx2_camera_base + 2 * MX2_CAMERA_BUF_SIZE,
+                                         mx2_camera_base + 2 * MX2_CAMERA_BUF_SIZE,
+                                         MX2_CAMERA_BUF_SIZE,
+                                         DMA_MEMORY_MAP | DMA_MEMORY_EXCLUSIVE);
+       if (!(dma & DMA_MEMORY_MAP))
+               return;
+}
+
+
 static void __init visstrim_m10_revision(void)
 {
        int exp_version = 0;
@@ -482,6 +506,7 @@ static void __init visstrim_m10_board_init(void)
        platform_device_register_resndata(NULL, "soc-camera-pdrv", 0, NULL, 0,
                                      &iclink_tvp5150, sizeof(iclink_tvp5150));
        gpio_led_register_device(0, &visstrim_m10_led_data);
+       visstrim_deinterlace_init();
        visstrim_camera_init();
        visstrim_coda_init();
 }