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SubjectRe: [PATCH v2 11/29] venus: venc,vdec: adds clocks needed for venus 4xx
Hi Stanimir,

On Tue, May 15, 2018 at 5:10 PM Stanimir Varbanov <
stanimir.varbanov@linaro.org> wrote:

> This extends the clocks number to support suspend and resume
> on Venus version 4xx.

> Signed-off-by: Stanimir Varbanov <stanimir.varbanov@linaro.org>
> ---
> drivers/media/platform/qcom/venus/core.h | 4 +--
> drivers/media/platform/qcom/venus/vdec.c | 42
++++++++++++++++++++++++++------
> drivers/media/platform/qcom/venus/venc.c | 42
++++++++++++++++++++++++++------
> 3 files changed, 72 insertions(+), 16 deletions(-)

> diff --git a/drivers/media/platform/qcom/venus/core.h
b/drivers/media/platform/qcom/venus/core.h
> index 8d3e150800c9..b5b9a84e9155 100644
> --- a/drivers/media/platform/qcom/venus/core.h
> +++ b/drivers/media/platform/qcom/venus/core.h
> @@ -92,8 +92,8 @@ struct venus_core {
> void __iomem *base;
> int irq;
> struct clk *clks[VIDC_CLKS_NUM_MAX];
> - struct clk *core0_clk;
> - struct clk *core1_clk;
> + struct clk *core0_clk, *core0_bus_clk;
> + struct clk *core1_clk, *core1_bus_clk;
> struct video_device *vdev_dec;
> struct video_device *vdev_enc;
> struct v4l2_device v4l2_dev;
> diff --git a/drivers/media/platform/qcom/venus/vdec.c
b/drivers/media/platform/qcom/venus/vdec.c
> index 261a51adeef2..c45452634e7e 100644
> --- a/drivers/media/platform/qcom/venus/vdec.c
> +++ b/drivers/media/platform/qcom/venus/vdec.c
> @@ -1081,12 +1081,18 @@ static int vdec_probe(struct platform_device
*pdev)
> if (!core)
> return -EPROBE_DEFER;

> - if (core->res->hfi_version == HFI_VERSION_3XX) {
> + if (IS_V3(core) || IS_V4(core)) {
> core->core0_clk = devm_clk_get(dev, "core");
> if (IS_ERR(core->core0_clk))
> return PTR_ERR(core->core0_clk);
> }

> + if (IS_V4(core)) {
> + core->core0_bus_clk = devm_clk_get(dev, "bus");
> + if (IS_ERR(core->core0_bus_clk))
> + return PTR_ERR(core->core0_bus_clk);
> + }
> +

Rather than doing this conditional dance, wouldn't it make more sense to
just list all the clocks in variant data struct and use clk_bulk_get()?

> platform_set_drvdata(pdev, core);

> vdev = video_device_alloc();
> @@ -1132,12 +1138,23 @@ static __maybe_unused int
vdec_runtime_suspend(struct device *dev)
> {
> struct venus_core *core = dev_get_drvdata(dev);

> - if (core->res->hfi_version == HFI_VERSION_1XX)
> + if (IS_V1(core))
> return 0;

> - writel(0, core->base + WRAPPER_VDEC_VCODEC_POWER_CONTROL);
> + if (IS_V3(core))
> + writel(0, core->base + WRAPPER_VDEC_VCODEC_POWER_CONTROL);
> + else if (IS_V4(core))
> + writel(0, core->base +
WRAPPER_VCODEC0_MMCC_POWER_CONTROL);
> +
> + if (IS_V4(core))
> + clk_disable_unprepare(core->core0_bus_clk);
> +
> clk_disable_unprepare(core->core0_clk);
> - writel(1, core->base + WRAPPER_VDEC_VCODEC_POWER_CONTROL);
> +
> + if (IS_V3(core))
> + writel(1, core->base + WRAPPER_VDEC_VCODEC_POWER_CONTROL);
> + else if (IS_V4(core))
> + writel(1, core->base +
WRAPPER_VCODEC0_MMCC_POWER_CONTROL);

Almost every step here differs between version. I'd suggest splitting this
into separate functions for both versions.


> return 0;
> }
> @@ -1147,12 +1164,23 @@ static __maybe_unused int
vdec_runtime_resume(struct device *dev)
> struct venus_core *core = dev_get_drvdata(dev);
> int ret;

> - if (core->res->hfi_version == HFI_VERSION_1XX)
> + if (IS_V1(core))
> return 0;

> - writel(0, core->base + WRAPPER_VDEC_VCODEC_POWER_CONTROL);
> + if (IS_V3(core))
> + writel(0, core->base + WRAPPER_VDEC_VCODEC_POWER_CONTROL);
> + else if (IS_V4(core))
> + writel(0, core->base +
WRAPPER_VCODEC0_MMCC_POWER_CONTROL);
> +
> ret = clk_prepare_enable(core->core0_clk);
> - writel(1, core->base + WRAPPER_VDEC_VCODEC_POWER_CONTROL);
> +
> + if (IS_V4(core))
> + ret |= clk_prepare_enable(core->core0_bus_clk);

Please don't OR error codes. If both calls end up with different errors,
the resulting value would be meaningless.

> +
> + if (IS_V3(core))
> + writel(1, core->base + WRAPPER_VDEC_VCODEC_POWER_CONTROL);
> + else if (IS_V4(core))
> + writel(1, core->base +
WRAPPER_VCODEC0_MMCC_POWER_CONTROL);

> return ret;
> }

Same for this function. I'd see separate function for each version.

> diff --git a/drivers/media/platform/qcom/venus/venc.c
b/drivers/media/platform/qcom/venus/venc.c
> index 947001170a77..bc8c2e7a8d2c 100644
> --- a/drivers/media/platform/qcom/venus/venc.c
> +++ b/drivers/media/platform/qcom/venus/venc.c
> @@ -1225,12 +1225,18 @@ static int venc_probe(struct platform_device
*pdev)
> if (!core)
> return -EPROBE_DEFER;

> - if (core->res->hfi_version == HFI_VERSION_3XX) {
> + if (IS_V3(core) || IS_V4(core)) {
> core->core1_clk = devm_clk_get(dev, "core");
> if (IS_ERR(core->core1_clk))
> return PTR_ERR(core->core1_clk);
> }

> + if (IS_V4(core)) {
> + core->core1_bus_clk = devm_clk_get(dev, "bus");
> + if (IS_ERR(core->core1_bus_clk))
> + return PTR_ERR(core->core1_bus_clk);
> + }
> +

Same as for corresponding function of vdec.

> platform_set_drvdata(pdev, core);

> vdev = video_device_alloc();
> @@ -1276,12 +1282,23 @@ static __maybe_unused int
venc_runtime_suspend(struct device *dev)
> {
> struct venus_core *core = dev_get_drvdata(dev);

> - if (core->res->hfi_version == HFI_VERSION_1XX)
> + if (IS_V1(core))
> return 0;

> - writel(0, core->base + WRAPPER_VENC_VCODEC_POWER_CONTROL);
> + if (IS_V3(core))
> + writel(0, core->base + WRAPPER_VENC_VCODEC_POWER_CONTROL);
> + else if (IS_V4(core))
> + writel(0, core->base +
WRAPPER_VCODEC1_MMCC_POWER_CONTROL);
> +
> + if (IS_V4(core))
> + clk_disable_unprepare(core->core1_bus_clk);
> +
> clk_disable_unprepare(core->core1_clk);
> - writel(1, core->base + WRAPPER_VENC_VCODEC_POWER_CONTROL);
> +
> + if (IS_V3(core))
> + writel(1, core->base + WRAPPER_VENC_VCODEC_POWER_CONTROL);
> + else if (IS_V4(core))
> + writel(1, core->base +
WRAPPER_VCODEC1_MMCC_POWER_CONTROL);

> return 0;
> }

Same as for vdec.

> @@ -1291,12 +1308,23 @@ static __maybe_unused int
venc_runtime_resume(struct device *dev)
> struct venus_core *core = dev_get_drvdata(dev);
> int ret;

> - if (core->res->hfi_version == HFI_VERSION_1XX)
> + if (IS_V1(core))
> return 0;

> - writel(0, core->base + WRAPPER_VENC_VCODEC_POWER_CONTROL);
> + if (IS_V3(core))
> + writel(0, core->base + WRAPPER_VENC_VCODEC_POWER_CONTROL);
> + else if (IS_V4(core))
> + writel(0, core->base +
WRAPPER_VCODEC1_MMCC_POWER_CONTROL);
> +
> ret = clk_prepare_enable(core->core1_clk);
> - writel(1, core->base + WRAPPER_VENC_VCODEC_POWER_CONTROL);
> +
> + if (IS_V4(core))
> + ret |= clk_prepare_enable(core->core1_bus_clk);
> +
> + if (IS_V3(core))
> + writel(1, core->base + WRAPPER_VENC_VCODEC_POWER_CONTROL);
> + else if (IS_V4(core))
> + writel(1, core->base +
WRAPPER_VCODEC1_MMCC_POWER_CONTROL);

> return ret;
> }

Same as for vdec.

Best regards,
Tomasz

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