[PATCH 1/2] video: drm: exynos: Add device tree support
Kyungmin Park
kmpark at infradead.org
Fri Jul 6 19:10:15 PDT 2012
Hi,
On Fri, Jul 6, 2012 at 9:28 PM, Leela Krishna Amudala
<l.krishna at samsung.com> wrote:
> Add device tree based discovery support for DRM-FIMD driver.
>
> Signed-off-by: Leela Krishna Amudala <l.krishna at 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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