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Commit 319477f3 authored by Chanho Park's avatar Chanho Park Committed by Inki Dae
Browse files

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 of input picture. Each SoCs has slightly different limit value
compared with any others.
For example, exynos4210's max_size of RGB888 is 16k x 16k. But, others have
8k x 8k. Another example the exynos5250 should have multiple of 2 pixel size
for its X/Y axis. Thus, we should keep different tables for each of them.
This patch also includes desciptions of each nodes for the rotator and specifies
a example how to bind it.

Signed-off-by: default avatarChanho Park <chanho61.park@samsung.com>
Signed-off-by: default avatarKyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: default avatarInki Dae <inki.dae@samsung.com>
parent e30655d0

Documentation/devicetree/bindings/gpu/samsung-rotator.txt

0 → 100644
+27 −0
Original line number Diff line number Diff line 
* Samsung Image Rotator



Required properties:

  - compatible : value should be one of the following:

	(a) "samsung,exynos4210-rotator" for Rotator IP in Exynos4210

	(b) "samsung,exynos4212-rotator" for Rotator IP in Exynos4212/4412

	(c) "samsung,exynos5250-rotator" for Rotator IP in Exynos5250



  - reg : Physical base address of the IP registers and length of memory

	  mapped region.



  - interrupts : Interrupt specifier for rotator interrupt, according to format

		 specific to interrupt parent.



  - clocks : Clock specifier for rotator clock, according to generic clock

	     bindings. (See Documentation/devicetree/bindings/clock/exynos*.txt)



  - clock-names : Names of clocks. For exynos rotator, it should be "rotator".



Example:

	rotator@12810000 {

		compatible = "samsung,exynos4210-rotator";

		reg = <0x12810000 0x1000>;

		interrupts = <0 83 0>;

		clocks = <&clock 278>;

		clock-names = "rotator";

	};

drivers/gpu/drm/exynos/exynos_drm_rotator.c

+80 −28
Original line number Diff line number Diff line
@@ -632,21 +632,98 @@ static int rotator_ippdrv_start(struct device *dev, enum drm_exynos_ipp_cmd cmd) 
	return 0;

}



static struct rot_limit_table rot_limit_tbl_4210 = {

	.ycbcr420_2p = {

		.min_w = 32,

		.min_h = 32,

		.max_w = SZ_64K,

		.max_h = SZ_64K,

		.align = 3,

	},

	.rgb888 = {

		.min_w = 8,

		.min_h = 8,

		.max_w = SZ_16K,

		.max_h = SZ_16K,

		.align = 2,

	},

};



static struct rot_limit_table rot_limit_tbl_4x12 = {

	.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 rot_limit_table rot_limit_tbl_5250 = {

	.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 = 1,

	},

};



static const struct of_device_id exynos_rotator_match[] = {

	{

		.compatible = "samsung,exynos4210-rotator",

		.data = &rot_limit_tbl_4210,

	},

	{

		.compatible = "samsung,exynos4212-rotator",

		.data = &rot_limit_tbl_4x12,

	},

	{

		.compatible = "samsung,exynos5250-rotator",

		.data = &rot_limit_tbl_5250,

	},

	{},

};



static int rotator_probe(struct platform_device *pdev)

{

	struct device *dev = &pdev->dev;

	struct rot_context *rot;

	struct exynos_drm_ippdrv *ippdrv;

	const struct of_device_id *match;

	int ret;



	if (!dev->of_node) {

		dev_err(dev, "cannot find of_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;

	match = of_match_node(exynos_rotator_match, dev->of_node);

	if (!match) {

		dev_err(dev, "failed to match node\n");

		return -ENODEV;

	}

	rot->limit_tbl = (struct rot_limit_table *)match->data;



	rot->regs_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);

	rot->regs = devm_ioremap_resource(dev, rot->regs_res);
@@ -718,31 +795,6 @@ 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 +856,10 @@ 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 = exynos_rotator_match,

	},

};