[PATCH 1/3] drm/exynos: add device tree support for rotator
Inki Dae
inki.dae at samsung.com
Mon Jul 22 08:20:23 EDT 2013
> -----Original Message-----
> From: linux-samsung-soc-owner at vger.kernel.org [mailto:linux-samsung-soc-
> owner at vger.kernel.org] On Behalf Of Chanho Park
> Sent: Monday, July 22, 2013 3:49 PM
> To: inki.dae at samsung.com; kgene.kim at samsung.com
> Cc: jy0922.shim at samsung.com; sw0312.kim at samsung.com;
> kyungmin.park at samsung.com; dri-devel at lists.freedesktop.org; linux-samsung-
> soc at vger.kernel.org; linux-arm-kernel at lists.infradead.org; devicetree-
> discuss at lists.ozlabs.org; Chanho Park
> Subject: [PATCH 1/3] drm/exynos: add device tree support for rotator
>
> The exynos4 platform is only dt-based since 3.10, we should convert driver
> data
> and ids to dt-based parsing methods. The rotator driver has a limit table
> to get
> size limit. The minimum size of RGB888 format is 8 x 8 and maximum size is
> 8K x
> 8K. The other format, YCbCr420 2-Plane has 32 x 32 min size and 32K x 32K
> max
> size. Each format should be multiple of 'align' value.
>
> Signed-off-by: Chanho Park <chanho61.park at samsung.com>
> Signed-off-by: Kyungmin Park <kyungmin.park at samsung.com>
> ---
> drivers/gpu/drm/exynos/exynos_drm_rotator.c | 110 +++++++++++++++++++---
> -----
> 1 file changed, 80 insertions(+), 30 deletions(-)
>
> diff --git a/drivers/gpu/drm/exynos/exynos_drm_rotator.c
> b/drivers/gpu/drm/exynos/exynos_drm_rotator.c
> index 427640a..b353a10 100644
> --- a/drivers/gpu/drm/exynos/exynos_drm_rotator.c
> +++ b/drivers/gpu/drm/exynos/exynos_drm_rotator.c
> @@ -96,7 +96,7 @@ struct rot_context {
> struct resource *regs_res;
> void __iomem *regs;
> struct clk *clock;
> - struct rot_limit_table *limit_tbl;
> + struct rot_limit_table limit_tbl;
> int irq;
> int cur_buf_id[EXYNOS_DRM_OPS_MAX];
> bool suspended;
> @@ -167,7 +167,7 @@ static irqreturn_t rotator_irq_handler(int irq, void
> *arg)
> static void rotator_align_size(struct rot_context *rot, u32 fmt, u32
> *hsize,
> u32 *vsize)
> {
> - struct rot_limit_table *limit_tbl = rot->limit_tbl;
> + struct rot_limit_table *limit_tbl = &rot->limit_tbl;
> struct rot_limit *limit;
> u32 mask, val;
>
> @@ -632,6 +632,72 @@ static int rotator_ippdrv_start(struct device *dev,
> enum drm_exynos_ipp_cmd cmd)
> return 0;
> }
>
> +static const struct of_device_id exynos_rotator_match[] = {
> + {
> + .compatible = "samsung,exynos4210-rotator",
> + },
> + {},
> +};
> +MODULE_DEVICE_TABLE(of, exynos_rotator_match);
Rotator device cannot be plugged in. Please remove the above
MODULE_DEVICE_TABLE.
> +
> +static int rotator_parse_dt_tbl(struct device_node *np, struct rot_limit
> *rlim)
> +{
> + int ret;
> +
> + ret = of_property_read_u32(np, "min_w", &rlim->min_w);
> + if (ret)
> + return ret;
> +
> + ret = of_property_read_u32(np, "min_h", &rlim->min_h);
> + if (ret)
> + return ret;
> +
> + ret = of_property_read_u32(np, "max_w", &rlim->max_w);
> + if (ret)
> + return ret;
> +
> + ret = of_property_read_u32(np, "max_h", &rlim->max_h);
> + if (ret)
> + return ret;
> +
> + ret = of_property_read_u32(np, "align", &rlim->align);
> + if (ret)
> + return ret;
> +
> + return 0;
> +}
> +
> +static int rotator_parse_dt(struct device *dev, struct rot_context *rot)
> +{
> + struct device_node *ycbcr_node, *rgb888_node;
> + int ret;
> +
> + ycbcr_node = of_get_child_by_name(dev->of_node, "ycbcr420_2p");
> + if (!ycbcr_node) {
> + dev_err(dev, "can't find ycbcr420_2p node\n");
> + return -ENODEV;
> + }
> +
> + rgb888_node = of_get_child_by_name(dev->of_node, "rgb888");
> + if (!rgb888_node) {
> + dev_err(dev, "can't find rgb888 node\n");
> + return -ENODEV;
> + }
> +
> + ret = rotator_parse_dt_tbl(ycbcr_node, &rot->limit_tbl.ycbcr420_2p);
> + if (ret) {
> + dev_err(dev, "failed to parse ycbcr420 data\n");
> + return ret;
> + }
> + ret = rotator_parse_dt_tbl(rgb888_node, &rot->limit_tbl.rgb888);
> + if (ret) {
> + dev_err(dev, "failed to parse rgb888 data\n");
> + return ret;
> + }
> +
> + return 0;
> +}
> +
> static int rotator_probe(struct platform_device *pdev)
> {
> struct device *dev = &pdev->dev;
> @@ -639,14 +705,23 @@ static int rotator_probe(struct platform_device
> *pdev)
> struct exynos_drm_ippdrv *ippdrv;
> int ret;
>
> + if (!dev->of_node) {
> + dev_err(dev, "Cannot find device tree node\n");
> + return -ENODEV;
> + }
> +
> rot = devm_kzalloc(dev, sizeof(*rot), GFP_KERNEL);
> if (!rot) {
> dev_err(dev, "failed to allocate rot\n");
> return -ENOMEM;
> }
>
> - rot->limit_tbl = (struct rot_limit_table *)
> - platform_get_device_id(pdev)->driver_data;
> + ret = rotator_parse_dt(dev, rot);
> + if (ret) {
> + dev_err(dev, "failed parse dt info\n");
> + devm_kfree(dev, rot);
> + return ret;
> + }
>
> rot->regs_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> rot->regs = devm_ioremap_resource(dev, rot->regs_res);
> @@ -718,31 +793,6 @@ static int rotator_remove(struct platform_device
> *pdev)
> return 0;
> }
>
> -static struct rot_limit_table rot_limit_tbl = {
> - .ycbcr420_2p = {
> - .min_w = 32,
> - .min_h = 32,
> - .max_w = SZ_32K,
> - .max_h = SZ_32K,
> - .align = 3,
> - },
> - .rgb888 = {
> - .min_w = 8,
> - .min_h = 8,
> - .max_w = SZ_8K,
> - .max_h = SZ_8K,
> - .align = 2,
> - },
> -};
> -
> -static struct platform_device_id rotator_driver_ids[] = {
> - {
> - .name = "exynos-rot",
> - .driver_data = (unsigned long)&rot_limit_tbl,
> - },
> - {},
> -};
> -
> static int rotator_clk_crtl(struct rot_context *rot, bool enable)
> {
> if (enable) {
> @@ -804,10 +854,10 @@ static const struct dev_pm_ops rotator_pm_ops = {
> struct platform_driver rotator_driver = {
> .probe = rotator_probe,
> .remove = rotator_remove,
> - .id_table = rotator_driver_ids,
> .driver = {
> .name = "exynos-rot",
> .owner = THIS_MODULE,
> .pm = &rotator_pm_ops,
> + .of_match_table = of_match_ptr(exynos_rotator_match),
> },
> };
> --
> 1.7.9.5
>
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