Re: [PATCH 1/2] video: drm: exynos: Add device tree support

Hi,

On Fri, Jul 6, 2012 at 9:28 PM, Leela Krishna Amudala l.krishna@samsung.com wrote:

Add device tree based discovery support for DRM-FIMD driver.

Signed-off-by: Leela Krishna Amudala l.krishna@samsung.com

diff --git a/drivers/gpu/drm/exynos/exynos_drm_fimd.c b/drivers/gpu/drm/exynos/exynos_drm_fimd.c index 29fdbfe..37769cf 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_fimd.c +++ b/drivers/gpu/drm/exynos/exynos_drm_fimd.c @@ -18,6 +18,7 @@ #include <linux/platform_device.h> #include <linux/clk.h> #include <linux/pm_runtime.h> +#include <linux/of.h>

#include <drm/exynos_drm.h> #include <plat/regs-fb-v4.h> @@ -788,12 +789,84 @@ static int fimd_power_on(struct fimd_context *ctx, bool enable) return 0; }

+#ifdef CONFIG_OF +static struct exynos_drm_fimd_pdata *drm_fimd_dt_parse_pdata(struct device *dev) +{

•   struct device_node *np = dev->of_node;
  

•   struct device_node *disp_np;
  

•   struct exynos_drm_fimd_pdata *pd;
  

•   u32 data[4];
  

•   pd = kzalloc(sizeof(*pd), GFP_KERNEL);
  

•   if (!pd) {
  

•           dev_err(dev, "memory allocation for pdata failed\n");
  

•           return ERR_PTR(-ENOMEM);
  

•   }
  

•   if (of_get_property(np, "samsung,fimd-vidout-rgb", NULL))
  

•           pd->vidcon0 |= VIDCON0_VIDOUT_RGB | VIDCON0_PNRMODE_RGB;
  

•   if (of_get_property(np, "samsung,fimd-vidout-tv", NULL))
  

•           pd->vidcon0 |= VIDCON0_VIDOUT_TV;
  

•   if (of_get_property(np, "samsung,fimd-inv-hsync", NULL))
  

•           pd->vidcon1 |= VIDCON1_INV_HSYNC;
  

•   if (of_get_property(np, "samsung,fimd-inv-vsync", NULL))
  

•           pd->vidcon1 |= VIDCON1_INV_VSYNC;
  

•   if (of_get_property(np, "samsung,fimd-inv-vclk", NULL))
  

•           pd->vidcon1 |= VIDCON1_INV_VCLK;
  

•   if (of_get_property(np, "samsung,fimd-inv-vden", NULL))
  

•           pd->vidcon1 |= VIDCON1_INV_VDEN;
  

•   disp_np = of_parse_phandle(np, "samsung,fimd-display", 0);
  

•   if (!disp_np) {
  

•           dev_err(dev, "unable to find display panel info\n");
  

•           return ERR_PTR(-EINVAL);
  

•   }
  

•   if (of_property_read_u32_array(disp_np, "lcd-htiming", data, 4)) {
  

•           dev_err(dev, "invalid horizontal timing\n");
  

•           return ERR_PTR(-EINVAL);
  

•   }
  

•   pd->panel.timing.left_margin = data[0];
  

•   pd->panel.timing.right_margin = data[1];
  

•   pd->panel.timing.hsync_len = data[2];
  

•   pd->panel.timing.xres = data[3];
  

•   if (of_property_read_u32_array(disp_np, "lcd-vtiming", data, 4)) {
  

•           dev_err(dev, "invalid vertical timing\n");
  

•           return ERR_PTR(-EINVAL);
  

•   }
  

•   pd->panel.timing.upper_margin = data[0];
  

•   pd->panel.timing.lower_margin = data[1];
  

•   pd->panel.timing.vsync_len = data[2];
  

•   pd->panel.timing.yres = data[3];
  

•   of_property_read_u32(disp_np, "lcd-panel-type", &pd->panel_type);
  

•   of_property_read_u32(np, "samsung,fimd-frame-rate",
  

•                           &pd->panel.timing.refresh);
  

•   of_property_read_u32(np, "samsung, defalut-window", &pd->default_win);
  

No space between after comma.

•   of_property_read_u32(np, "samsung,fimd-win-bpp", &pd->bpp);
  

•   return pd;
  

+} +#else +static int drm_fimd_dt_parse_pdata(struct device *dev,

•                                   struct exynos_drm_fimd_pdata **pdata)
  

+{

•   return 0;
  

+} +#endif /* CONFIG_OF */

+static const struct of_device_id drm_fimd_dt_match[];

static int __devinit fimd_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct fimd_context *ctx; struct exynos_drm_subdrv *subdrv;

•   struct exynos_drm_fimd_pdata *pdata;
  

•   struct exynos_drm_fimd_pdata *pdata = pdev->dev.platform_data;
    struct exynos_drm_panel_info *panel;
    struct resource *res;
    int win;
  

@@ -801,7 +874,11 @@ static int __devinit fimd_probe(struct platform_device *pdev)

    DRM_DEBUG_KMS("%s\n", __FILE__);

•   pdata = pdev->dev.platform_data;
  

•   if (pdev->dev.of_node) {
  

•           pdata = drm_fimd_dt_parse_pdata(&pdev->dev);
  

•           if (IS_ERR(pdata))
  

•                   return PTR_ERR(pdata);
  

•   }
    if (!pdata) {
            dev_err(dev, "no platform data specified\n");
            return -EINVAL;
  

@@ -1006,6 +1083,15 @@ static int fimd_runtime_resume(struct device *dev) } #endif

+#ifdef CONFIG_OF +static const struct of_device_id drm_fimd_dt_match[] = {

•   { .compatible = "samsung,exynos5-fb",
  

It's ambiguous. it's better to use "samsung,exynos5-drm". Yes I know, previous it uses exynos4-fb to reduce the modification with mainline. but correct name is exynoxX-drm.

Thank you, Kyungmin Park

•           .data = (void *)NULL },
  

•   {},
  

+}; +MODULE_DEVICE_TABLE(of, drm_fimd_dt_match); +#endif

static const struct dev_pm_ops fimd_pm_ops = { SET_SYSTEM_SLEEP_PM_OPS(fimd_suspend, fimd_resume) SET_RUNTIME_PM_OPS(fimd_runtime_suspend, fimd_runtime_resume, NULL) @@ -1018,5 +1104,6 @@ struct platform_driver fimd_driver = { .name = "exynos4-fb", .owner = THIS_MODULE, .pm = &fimd_pm_ops,

•           .of_match_table = of_match_ptr(drm_fimd_dt_match),
    },
  

}; diff --git a/include/drm/exynos_drm.h b/include/drm/exynos_drm.h index 6873358..fecaee8 100644 --- a/include/drm/exynos_drm.h +++ b/include/drm/exynos_drm.h @@ -224,6 +224,11 @@ struct exynos_drm_panel_info { u32 height_mm; };

+enum disp_panel_type {

•   MIPI_LCD,
  

•   DP_LCD
  

+};

/**

• Platform Specific Structure for DRM based FIMD.

@@ -237,6 +242,7 @@ struct exynos_drm_fimd_pdata { u32 vidcon1; unsigned int default_win; unsigned int bpp;

•   enum disp_panel_type            panel_type;
  

};

/**

1.7.0.4

---

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