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SubjectRe: [PATCH v2 2/2] ASoC: qcom: soundwire: Add software clock gating requirement check
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On 08/06/2022 06:57, Srinivasa Rao Mandadapu wrote:
> Validate software clock gating required or not and do software
> clock gating on hclk if soundwire is operational and keep it
> running by adding flag in private dat structure.
> This is to avoid conflict between older architectures,
> where software clock gating is not required and on latest
> architectues, where software clock gating is mandatory.
>
> Signed-off-by: Srinivasa Rao Mandadapu <quic_srivasam@quicinc.com>
> ---
> drivers/soundwire/qcom.c | 27 ++++++++++++++++++++-------
> 1 file changed, 20 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/soundwire/qcom.c b/drivers/soundwire/qcom.c
> index 38c3bf5..930aa93 100644
> --- a/drivers/soundwire/qcom.c
> +++ b/drivers/soundwire/qcom.c
> @@ -194,6 +194,12 @@ static const struct qcom_swrm_data swrm_v1_5_data = {
> .default_cols = 16,
> };
>
> +static const struct qcom_swrm_data swrm_v1_6_data = {
> + .default_rows = 50,
> + .default_cols = 16,
> + .sw_clk_gate_required = 1,

.sw_clk_gate_required = true,

instead of 1 and 0

Once fixed,

Reviewed-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>

--srini



> +};
> +
> #define to_qcom_sdw(b) container_of(b, struct qcom_swrm_ctrl, bus)
>
> static int qcom_swrm_ahb_reg_read(struct qcom_swrm_ctrl *ctrl, int reg,
> @@ -659,7 +665,8 @@ static int qcom_swrm_init(struct qcom_swrm_ctrl *ctrl)
> val = FIELD_PREP(SWRM_MCP_FRAME_CTRL_BANK_ROW_CTRL_BMSK, ctrl->rows_index);
> val |= FIELD_PREP(SWRM_MCP_FRAME_CTRL_BANK_COL_CTRL_BMSK, ctrl->cols_index);
>
> - reset_control_reset(ctrl->audio_cgcr);
> + if (ctrl->audio_cgcr)
> + reset_control_reset(ctrl->audio_cgcr);
>
> ctrl->reg_write(ctrl, SWRM_MCP_FRAME_CTRL_BANK_ADDR(0), val);
>
> @@ -1312,6 +1319,15 @@ static int qcom_swrm_probe(struct platform_device *pdev)
> return PTR_ERR(ctrl->mmio);
> }
>
> + if (data->sw_clk_gate_required) {
> + ctrl->audio_cgcr = devm_reset_control_get_exclusive(dev, "swr_audio_cgcr");
> + if (IS_ERR(ctrl->audio_cgcr)) {
> + dev_err(dev, "Failed to get cgcr reset ctrl required for SW gating\n");
> + ret = PTR_ERR(ctrl->audio_cgcr);
> + goto err_init;
> + }
> + }
> +
> ctrl->irq = of_irq_get(dev->of_node, 0);
> if (ctrl->irq < 0) {
> ret = ctrl->irq;
> @@ -1337,10 +1353,6 @@ static int qcom_swrm_probe(struct platform_device *pdev)
> ctrl->bus.compute_params = &qcom_swrm_compute_params;
> ctrl->bus.clk_stop_timeout = 300;
>
> - ctrl->audio_cgcr = devm_reset_control_get_exclusive(dev, "swr_audio_cgcr");
> - if (IS_ERR(ctrl->audio_cgcr))
> - dev_err(dev, "Failed to get audio_cgcr reset required for soundwire-v1.6.0\n");
> -
> ret = qcom_swrm_get_port_config(ctrl);
> if (ret)
> goto err_clk;
> @@ -1494,7 +1506,8 @@ static int __maybe_unused swrm_runtime_resume(struct device *dev)
> qcom_swrm_get_device_status(ctrl);
> sdw_handle_slave_status(&ctrl->bus, ctrl->status);
> } else {
> - reset_control_reset(ctrl->audio_cgcr);
> + if (ctrl->audio_cgcr)
> + reset_control_reset(ctrl->audio_cgcr);
>
> ctrl->reg_write(ctrl, SWRM_MCP_BUS_CTRL, SWRM_MCP_BUS_CLK_START);
> ctrl->reg_write(ctrl, SWRM_INTERRUPT_CLEAR,
> @@ -1559,7 +1572,7 @@ static const struct dev_pm_ops swrm_dev_pm_ops = {
> static const struct of_device_id qcom_swrm_of_match[] = {
> { .compatible = "qcom,soundwire-v1.3.0", .data = &swrm_v1_3_data },
> { .compatible = "qcom,soundwire-v1.5.1", .data = &swrm_v1_5_data },
> - { .compatible = "qcom,soundwire-v1.6.0", .data = &swrm_v1_5_data },
> + { .compatible = "qcom,soundwire-v1.6.0", .data = &swrm_v1_6_data },
> {/* sentinel */},
> };
>

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