Hi Laurent,
On 08/04/14 18:16, Laurent Pinchart wrote:
It may be worth to split DT binding documentation and the driver changes
into separate patches, and perhaps add some commit description here.
Either way fell free to stick:
Acked-by: Sylwester Nawrocki <s.nawrocki@xxxxxxxxxxx>
> Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@xxxxxxxxxxxxxxxx>
>
> ---
> .../devicetree/bindings/media/renesas,vsp1.txt | 43 ++++++++++++++++++
> drivers/media/platform/vsp1/vsp1_drv.c | 52 ++++++++++++++++++----
> 2 files changed, 87 insertions(+), 8 deletions(-)
> create mode 100644 Documentation/devicetree/bindings/media/renesas,vsp1.txt
>
> Hi,
>
> This is the second last call (I'm perfectly aware of the logic flaw in this
> sentence, thank you :-)) for DT bindings review, with a small change to the
> bindings wording compared to v2. I plan to send a pull request at the end of
> the week.
>
> Changes since v2:
>
> - Remove the interrupt-parent property
> - Drop of_match_ptr() as the table is always compiled in
>
> Changes since v1:
>
> - Drop the clock-names property, as the VSP1 uses a single clock
>
> diff --git a/Documentation/devicetree/bindings/media/renesas,vsp1.txt b/Documentation/devicetree/bindings/media/renesas,vsp1.txt
> new file mode 100644
> index 0000000..87fe08a
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/media/renesas,vsp1.txt
> @@ -0,0 +1,43 @@
> +* Renesas VSP1 Video Processing Engine
> +
> +The VSP1 is a video processing engine that supports up-/down-scaling, alpha
> +blending, color space conversion and various other image processing features.
> +It can be found in the Renesas R-Car second generation SoCs.
> +
> +Required properties:
> +
> + - compatible: Must contain "renesas,vsp1"
> +
> + - reg: Base address and length of the registers block for the VSP1.
> + - interrupts: VSP1 interrupt specifier.
> + - clocks: A phandle + clock-specifier pair for the VSP1 functional clock.
> +
> + - renesas,#rpf: Number of Read Pixel Formatter (RPF) modules in the VSP1.
> + - renesas,#uds: Number of Up Down Scaler (UDS) modules in the VSP1.
> + - renesas,#wpf: Number of Write Pixel Formatter (WPF) modules in the VSP1.
> +
> +
> +Optional properties:
> +
> + - renesas,has-lif: Boolean, indicates that the LCD Interface (LIF) module is
> + available.
> + - renesas,has-lut: Boolean, indicates that the Look Up Table (LUT) module is
> + available.
> + - renesas,has-sru: Boolean, indicates that the Super Resolution Unit (SRU)
> + module is available.
> +
> +
> +Example: R8A7790 (R-Car H2) VSP1-S node
> +
> + vsp1@fe928000 {
> + compatible = "renesas,vsp1";
> + reg = <0 0xfe928000 0 0x8000>;
> + interrupts = <0 267 IRQ_TYPE_LEVEL_HIGH>;
> + clocks = <&mstp1_clks R8A7790_CLK_VSP1_S>;
> +
> + renesas,has-lut;
> + renesas,has-sru;
> + renesas,#rpf = <5>;
> + renesas,#uds = <3>;
> + renesas,#wpf = <4>;
> + };
> diff --git a/drivers/media/platform/vsp1/vsp1_drv.c b/drivers/media/platform/vsp1/vsp1_drv.c
> index 28e1de3..c69ee06 100644
> --- a/drivers/media/platform/vsp1/vsp1_drv.c
> +++ b/drivers/media/platform/vsp1/vsp1_drv.c
> @@ -16,6 +16,7 @@
> #include <linux/device.h>
> #include <linux/interrupt.h>
> #include <linux/module.h>
> +#include <linux/of.h>
> #include <linux/platform_device.h>
> #include <linux/videodev2.h>
>
> @@ -431,34 +432,59 @@ static const struct dev_pm_ops vsp1_pm_ops = {
> * Platform Driver
> */
>
> -static struct vsp1_platform_data *
> -vsp1_get_platform_data(struct platform_device *pdev)
> +static int vsp1_validate_platform_data(struct platform_device *pdev,
> + struct vsp1_platform_data *pdata)
> {
> - struct vsp1_platform_data *pdata = pdev->dev.platform_data;
> -
> if (pdata == NULL) {
> dev_err(&pdev->dev, "missing platform data\n");
> - return NULL;
> + return -EINVAL;
> }
>
> if (pdata->rpf_count <= 0 || pdata->rpf_count > VPS1_MAX_RPF) {
> dev_err(&pdev->dev, "invalid number of RPF (%u)\n",
> pdata->rpf_count);
> - return NULL;
> + return -EINVAL;
> }
>
> if (pdata->uds_count <= 0 || pdata->uds_count > VPS1_MAX_UDS) {
> dev_err(&pdev->dev, "invalid number of UDS (%u)\n",
> pdata->uds_count);
> - return NULL;
> + return -EINVAL;
> }
>
> if (pdata->wpf_count <= 0 || pdata->wpf_count > VPS1_MAX_WPF) {
> dev_err(&pdev->dev, "invalid number of WPF (%u)\n",
> pdata->wpf_count);
> - return NULL;
> + return -EINVAL;
> }
>
> + return 0;
> +}
> +
> +static struct vsp1_platform_data *
> +vsp1_get_platform_data(struct platform_device *pdev)
> +{
> + struct device_node *np = pdev->dev.of_node;
> + struct vsp1_platform_data *pdata;
> +
> + if (!IS_ENABLED(CONFIG_OF) || np == NULL)
> + return pdev->dev.platform_data;
> +
> + pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
> + if (pdata == NULL)
> + return NULL;
> +
> + if (of_property_read_bool(np, "renesas,has-lif"))
> + pdata->features |= VSP1_HAS_LIF;
> + if (of_property_read_bool(np, "renesas,has-lut"))
> + pdata->features |= VSP1_HAS_LUT;
> + if (of_property_read_bool(np, "renesas,has-sru"))
> + pdata->features |= VSP1_HAS_SRU;
> +
> + of_property_read_u32(np, "renesas,#rpf", &pdata->rpf_count);
> + of_property_read_u32(np, "renesas,#uds", &pdata->uds_count);
> + of_property_read_u32(np, "renesas,#wpf", &pdata->wpf_count);
> +
> return pdata;
> }
>
> @@ -481,6 +507,10 @@ static int vsp1_probe(struct platform_device *pdev)
> if (vsp1->pdata == NULL)
> return -ENODEV;
>
> + ret = vsp1_validate_platform_data(pdev, vsp1->pdata);
> + if (ret < 0)
> + return ret;
> +
> /* I/O, IRQ and clock resources */
> io = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> vsp1->mmio = devm_ioremap_resource(&pdev->dev, io);
> @@ -527,6 +557,11 @@ static int vsp1_remove(struct platform_device *pdev)
> return 0;
> }
>
> +static const struct of_device_id vsp1_of_match[] = {
> + { .compatible = "renesas,vsp1" },
> + { },
> +};
> +
> static struct platform_driver vsp1_platform_driver = {
> .probe = vsp1_probe,
> .remove = vsp1_remove,
> @@ -534,6 +569,7 @@ static struct platform_driver vsp1_platform_driver = {
> .owner = THIS_MODULE,
> .name = "vsp1",
> .pm = &vsp1_pm_ops,
> + .of_match_table = vsp1_of_match,
> },
> };
--
Regards,
Sylwester
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