[PATCHv3 1/4] drm/exynos: add device tree support for rotator
Chanho Park
chanho61.park at samsung.com
Mon Aug 12 22:12:56 PDT 2013
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: Chanho Park <chanho61.park at samsung.com>
Cc: Inki Dae <inki.dae at samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park at samsung.com>
---
.../devicetree/bindings/gpu/samsung-rotator.txt | 27 +++++
drivers/gpu/drm/exynos/exynos_drm_rotator.c | 108 +++++++++++++++-----
2 files changed, 107 insertions(+), 28 deletions(-)
create mode 100644 Documentation/devicetree/bindings/gpu/samsung-rotator.txt
diff --git a/Documentation/devicetree/bindings/gpu/samsung-rotator.txt b/Documentation/devicetree/bindings/gpu/samsung-rotator.txt
new file mode 100644
index 0000000..82cd1ed
--- /dev/null
+++ b/Documentation/devicetree/bindings/gpu/samsung-rotator.txt
@@ -0,0 +1,27 @@
+* 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 at 12810000 {
+ compatible = "samsung,exynos4210-rotator";
+ reg = <0x12810000 0x1000>;
+ interrupts = <0 83 0>;
+ clocks = <&clock 278>;
+ clock-names = "rotator";
+ };
diff --git a/drivers/gpu/drm/exynos/exynos_drm_rotator.c b/drivers/gpu/drm/exynos/exynos_drm_rotator.c
index 427640a..0485aea5 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_rotator.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_rotator.c
@@ -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,
},
};
--
1.7.9.5
More information about the dri-devel
mailing list