Re: [PATCH v4 11/27] venus: core,helpers: add two more clocks found in Venus 4xx

From: Alexandre Courbot
Date: Mon Jul 02 2018 - 04:48:03 EST

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On Thu, Jun 28, 2018 at 12:34 AM Stanimir Varbanov
<stanimir.varbanov@xxxxxxxxxx> wrote:
>
> Add two more clocks for Venus 4xx in core structure and create
> a new power enable function to handle it for 3xx/4xx versions.
>
> Signed-off-by: Stanimir Varbanov <stanimir.varbanov@xxxxxxxxxx>
> ---
> drivers/media/platform/qcom/venus/core.h | 4 +++
> drivers/media/platform/qcom/venus/helpers.c | 51 +++++++++++++++++++++++++++++
> drivers/media/platform/qcom/venus/helpers.h | 2 ++
> drivers/media/platform/qcom/venus/vdec.c | 44 ++++++++++++++++++++-----
> drivers/media/platform/qcom/venus/venc.c | 44 ++++++++++++++++++++-----
> 5 files changed, 129 insertions(+), 16 deletions(-)
>
> diff --git a/drivers/media/platform/qcom/venus/core.h b/drivers/media/platform/qcom/venus/core.h
> index 8d3e150800c9..2bf8839784fa 100644
> --- a/drivers/media/platform/qcom/venus/core.h
> +++ b/drivers/media/platform/qcom/venus/core.h
> @@ -65,6 +65,8 @@ struct venus_format {
> * @clks: an array of struct clk pointers
> * @core0_clk: a struct clk pointer for core0
> * @core1_clk: a struct clk pointer for core1
> + * @core0_bus_clk: a struct clk pointer for core0 bus clock
> + * @core1_bus_clk: a struct clk pointer for core1 bus clock
> * @vdev_dec: a reference to video device structure for decoder instances
> * @vdev_enc: a reference to video device structure for encoder instances
> * @v4l2_dev: a holder for v4l2 device structure
> @@ -94,6 +96,8 @@ struct venus_core {
> struct clk *clks[VIDC_CLKS_NUM_MAX];
> struct clk *core0_clk;
> struct clk *core1_clk;
> + struct clk *core0_bus_clk;
> + struct 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/helpers.c b/drivers/media/platform/qcom/venus/helpers.c
> index d9065cc8a7d3..228084e72fb7 100644
> --- a/drivers/media/platform/qcom/venus/helpers.c
> +++ b/drivers/media/platform/qcom/venus/helpers.c
> @@ -13,6 +13,7 @@
> *
> */
> #include <linux/clk.h>
> +#include <linux/iopoll.h>
> #include <linux/list.h>
> #include <linux/mutex.h>
> #include <linux/pm_runtime.h>
> @@ -24,6 +25,7 @@
> #include "core.h"
> #include "helpers.h"
> #include "hfi_helper.h"
> +#include "hfi_venus_io.h"
>
> struct intbuf {
> struct list_head list;
> @@ -781,3 +783,52 @@ void venus_helper_init_instance(struct venus_inst *inst)
> }
> }
> EXPORT_SYMBOL_GPL(venus_helper_init_instance);
> +
> +int venus_helper_power_enable(struct venus_core *core, u32 session_type,
> + bool enable)
> +{
> + void __iomem *ctrl, *stat;
> + u32 val;
> + int ret;
> +
> + if (!IS_V3(core) && !IS_V4(core))
> + return 0;
> +
> + if (IS_V3(core)) {
> + if (session_type == VIDC_SESSION_TYPE_DEC)
> + ctrl = core->base + WRAPPER_VDEC_VCODEC_POWER_CONTROL;
> + else
> + ctrl = core->base + WRAPPER_VENC_VCODEC_POWER_CONTROL;
> + if (enable)
> + writel(0, ctrl);
> + else
> + writel(1, ctrl);
> +
> + return 0;
> + }
> +
> + if (session_type == VIDC_SESSION_TYPE_DEC) {
> + ctrl = core->base + WRAPPER_VCODEC0_MMCC_POWER_CONTROL;
> + stat = core->base + WRAPPER_VCODEC0_MMCC_POWER_STATUS;
> + } else {
> + ctrl = core->base + WRAPPER_VCODEC1_MMCC_POWER_CONTROL;
> + stat = core->base + WRAPPER_VCODEC1_MMCC_POWER_STATUS;
> + }
> +
> + if (enable) {
> + writel(0, ctrl);
> +
> + ret = readl_poll_timeout(stat, val, val & BIT(1), 1, 100);
> + if (ret)
> + return ret;
> + } else {
> + writel(1, ctrl);
> +
> + ret = readl_poll_timeout(stat, val, !(val & BIT(1)), 1, 100);
> + if (ret)
> + return ret;
> + }
> +
> + return 0;
> +}
> +EXPORT_SYMBOL_GPL(venus_helper_power_enable);
> diff --git a/drivers/media/platform/qcom/venus/helpers.h b/drivers/media/platform/qcom/venus/helpers.h
> index 971392be5df5..0e64aa95624a 100644
> --- a/drivers/media/platform/qcom/venus/helpers.h
> +++ b/drivers/media/platform/qcom/venus/helpers.h
> @@ -43,4 +43,6 @@ int venus_helper_set_color_format(struct venus_inst *inst, u32 fmt);
> void venus_helper_acquire_buf_ref(struct vb2_v4l2_buffer *vbuf);
> void venus_helper_release_buf_ref(struct venus_inst *inst, unsigned int idx);
> void venus_helper_init_instance(struct venus_inst *inst);
> +int venus_helper_power_enable(struct venus_core *core, u32 session_type,
> + bool enable);
> #endif
> diff --git a/drivers/media/platform/qcom/venus/vdec.c b/drivers/media/platform/qcom/venus/vdec.c
> index 261a51adeef2..3cf243ddcdb8 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);
> + }
> +
> platform_set_drvdata(pdev, core);
>
> vdev = video_device_alloc();
> @@ -1131,15 +1137,21 @@ static int vdec_remove(struct platform_device *pdev)
> static __maybe_unused int vdec_runtime_suspend(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);
> + ret = venus_helper_power_enable(core, VIDC_SESSION_TYPE_DEC, true);
> +
> + 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);
>
> - return 0;
> + ret |= venus_helper_power_enable(core, VIDC_SESSION_TYPE_DEC, false);

Is it safe to OR two potentially different error messages, at the risk
of getting a third one that is different?

If venus_helper_power_enable() fails, shouldn't we just exit early and
signify that the suspend operation failed?

> +
> + return ret;
> }
>
> static __maybe_unused int vdec_runtime_resume(struct device *dev)
> @@ -1147,13 +1159,29 @@ 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);
> + ret = venus_helper_power_enable(core, VIDC_SESSION_TYPE_DEC, true);
> + if (ret)
> + return ret;

... similarly to what it done here, actually.

> +
> ret = clk_prepare_enable(core->core0_clk);
> - writel(1, core->base + WRAPPER_VDEC_VCODEC_POWER_CONTROL);
> + if (ret)
> + goto err_power_disable;
> +
> + if (IS_V4(core))
> + ret = clk_prepare_enable(core->core0_bus_clk);
>
> + if (ret)
> + goto err_unprepare_core0;
> +
> + return venus_helper_power_enable(core, VIDC_SESSION_TYPE_DEC, false);
> +
> +err_unprepare_core0:
> + clk_disable_unprepare(core->core0_clk);
> +err_power_disable:
> + venus_helper_power_enable(core, VIDC_SESSION_TYPE_DEC, false);
> return ret;
> }
>
> diff --git a/drivers/media/platform/qcom/venus/venc.c b/drivers/media/platform/qcom/venus/venc.c
> index 947001170a77..2cd7b342b208 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);
> + }
> +
> platform_set_drvdata(pdev, core);
>
> vdev = video_device_alloc();
> @@ -1275,15 +1281,21 @@ static int venc_remove(struct platform_device *pdev)
> static __maybe_unused int venc_runtime_suspend(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);
> + ret = venus_helper_power_enable(core, VIDC_SESSION_TYPE_ENC, true);
> +
> + 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);
>
> - return 0;
> + ret |= venus_helper_power_enable(core, VIDC_SESSION_TYPE_ENC, false);

Same question for this function.

> +
> + return ret;
> }
>
> static __maybe_unused int venc_runtime_resume(struct device *dev)
> @@ -1291,13 +1303,29 @@ 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);
> + ret = venus_helper_power_enable(core, VIDC_SESSION_TYPE_ENC, true);
> + if (ret)
> + return ret;
> +
> ret = clk_prepare_enable(core->core1_clk);
> - writel(1, core->base + WRAPPER_VENC_VCODEC_POWER_CONTROL);
> + if (ret)
> + goto err_power_disable;
> +
> + if (IS_V4(core))
> + ret = clk_prepare_enable(core->core1_bus_clk);
>
> + if (ret)
> + goto err_unprepare_core1;
> +
> + return venus_helper_power_enable(core, VIDC_SESSION_TYPE_ENC, false);
> +
> +err_unprepare_core1:
> + clk_disable_unprepare(core->core1_clk);
> +err_power_disable:
> + venus_helper_power_enable(core, VIDC_SESSION_TYPE_ENC, false);
> return ret;
> }
>
> --
> 2.14.1
>

Next message: Viresh Kumar: "[PATCH v4.9] PM / OPP: Update voltage in case freq == old_freq"
Previous message: Alexandre Courbot: "Re: [PATCH v4 14/27] venus: helpers: add a helper function to set dynamic buffer mode"
Next in thread: Stanimir Varbanov: "Re: [PATCH v4 11/27] venus: core,helpers: add two more clocks found in Venus 4xx"
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