linux-kernel - Re: [PATCH 1/2] soundwire: qcom: define hardcoded version magic numbers

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Message-ID: <65533400-5baa-1577-f2af-c9fca9e888e4@linaro.org>
Date:   Wed, 22 Feb 2023 15:45:21 +0100
From:   Konrad Dybcio <konrad.dybcio@...aro.org>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Vinod Koul <vkoul@...nel.org>,
        Bard Liao <yung-chuan.liao@...ux.intel.com>,
        Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>,
        Sanyog Kale <sanyog.r.kale@...el.com>,
        linux-arm-msm@...r.kernel.org, alsa-devel@...a-project.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] soundwire: qcom: define hardcoded version magic
 numbers



On 22.02.2023 15:44, Krzysztof Kozlowski wrote:
> Use a define instead of hard-coded register values for Soundwire
> hardware version number, because it is a bit easier to read and allows
> to drop explaining comment.
> 
> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
> ---
Reviewed-by: Konrad Dybcio <konrad.dybcio@...aro.org>

Konrad
>  drivers/soundwire/qcom.c | 17 +++++++++--------
>  1 file changed, 9 insertions(+), 8 deletions(-)
> 
> diff --git a/drivers/soundwire/qcom.c b/drivers/soundwire/qcom.c
> index ba502129150d..79bebcecde6d 100644
> --- a/drivers/soundwire/qcom.c
> +++ b/drivers/soundwire/qcom.c
> @@ -28,6 +28,9 @@
>  #define SWRM_LINK_MANAGER_EE					0x018
>  #define SWRM_EE_CPU						1
>  #define SWRM_FRM_GEN_ENABLED					BIT(0)
> +#define SWRM_VERSION_1_3_0					0x01030000
> +#define SWRM_VERSION_1_5_1					0x01050001
> +#define SWRM_VERSION_1_7_0					0x01070000
>  #define SWRM_COMP_HW_VERSION					0x00
>  #define SWRM_COMP_CFG_ADDR					0x04
>  #define SWRM_COMP_CFG_IRQ_LEVEL_OR_PULSE_MSK			BIT(1)
> @@ -351,8 +354,7 @@ static int qcom_swrm_cmd_fifo_wr_cmd(struct qcom_swrm_ctrl *swrm, u8 cmd_data,
>  	/* Its assumed that write is okay as we do not get any status back */
>  	swrm->reg_write(swrm, SWRM_CMD_FIFO_WR_CMD, val);
>  
> -	/* version 1.3 or less */
> -	if (swrm->version <= 0x01030000)
> +	if (swrm->version <= SWRM_VERSION_1_3_0)
>  		usleep_range(150, 155);
>  
>  	if (cmd_id == SWR_BROADCAST_CMD_ID) {
> @@ -695,7 +697,7 @@ static int qcom_swrm_init(struct qcom_swrm_ctrl *ctrl)
>  	u32p_replace_bits(&val, SWRM_DEF_CMD_NO_PINGS, SWRM_MCP_CFG_MAX_NUM_OF_CMD_NO_PINGS_BMSK);
>  	ctrl->reg_write(ctrl, SWRM_MCP_CFG_ADDR, val);
>  
> -	if (ctrl->version >= 0x01070000) {
> +	if (ctrl->version >= SWRM_VERSION_1_7_0) {
>  		ctrl->reg_write(ctrl, SWRM_LINK_MANAGER_EE, SWRM_EE_CPU);
>  		ctrl->reg_write(ctrl, SWRM_MCP_BUS_CTRL,
>  				SWRM_MCP_BUS_CLK_START << SWRM_EE_CPU);
> @@ -704,8 +706,7 @@ static int qcom_swrm_init(struct qcom_swrm_ctrl *ctrl)
>  	}
>  
>  	/* Configure number of retries of a read/write cmd */
> -	if (ctrl->version >= 0x01050001) {
> -		/* Only for versions >= 1.5.1 */
> +	if (ctrl->version >= SWRM_VERSION_1_5_1) {
>  		ctrl->reg_write(ctrl, SWRM_CMD_FIFO_CFG_ADDR,
>  				SWRM_RD_WR_CMD_RETRIES |
>  				SWRM_CONTINUE_EXEC_ON_CMD_IGNORE);
> @@ -1239,7 +1240,7 @@ static int qcom_swrm_get_port_config(struct qcom_swrm_ctrl *ctrl)
>  	ret = of_property_read_u8_array(np, "qcom,ports-block-pack-mode",
>  					bp_mode, nports);
>  	if (ret) {
> -		if (ctrl->version <= 0x01030000)
> +		if (ctrl->version <= SWRM_VERSION_1_3_0)
>  			memset(bp_mode, SWR_INVALID_PARAM, QCOM_SDW_MAX_PORTS);
>  		else
>  			return ret;
> @@ -1442,7 +1443,7 @@ static int qcom_swrm_probe(struct platform_device *pdev)
>  	pm_runtime_enable(dev);
>  
>  	/* Clk stop is not supported on WSA Soundwire masters */
> -	if (ctrl->version <= 0x01030000) {
> +	if (ctrl->version <= SWRM_VERSION_1_3_0) {
>  		ctrl->clock_stop_not_supported = true;
>  	} else {
>  		ctrl->reg_read(ctrl, SWRM_COMP_MASTER_ID, &val);
> @@ -1527,7 +1528,7 @@ static int __maybe_unused swrm_runtime_resume(struct device *dev)
>  	} else {
>  		reset_control_reset(ctrl->audio_cgcr);
>  
> -		if (ctrl->version >= 0x01070000) {
> +		if (ctrl->version >= SWRM_VERSION_1_7_0) {
>  			ctrl->reg_write(ctrl, SWRM_LINK_MANAGER_EE, SWRM_EE_CPU);
>  			ctrl->reg_write(ctrl, SWRM_MCP_BUS_CTRL,
>  					SWRM_MCP_BUS_CLK_START << SWRM_EE_CPU);