Re: [PATCH v3 2/2] soundwire: qcom: add support for SoundWire controller

From: Vinod Koul <vkoul@kernel.org>
To: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Cc: robh@kernel.org, broonie@kernel.org, bgoswami@codeaurora.org,
	pierre-louis.bossart@linux.intel.com, devicetree@vger.kernel.org,
	lgirdwood@gmail.com, alsa-devel@alsa-project.org,
	linux-kernel@vger.kernel.org, spapothi@codeaurora.org
Subject: Re: [PATCH v3 2/2] soundwire: qcom: add support for SoundWire controller
Date: Mon, 21 Oct 2019 10:14:05 +0530	[thread overview]
Message-ID: <20191021044405.GB2654@vkoul-mobl> (raw)
In-Reply-To: <20191011154423.2506-3-srinivas.kandagatla@linaro.org>

On 11-10-19, 16:44, Srinivas Kandagatla wrote:

> +static irqreturn_t qcom_swrm_irq_handler(int irq, void *dev_id)
> +{
> +	struct qcom_swrm_ctrl *ctrl = dev_id;
> +	u32 sts, value;
> +	unsigned long flags;
> +
> +	ctrl->reg_read(ctrl, SWRM_INTERRUPT_STATUS, &sts);
> +
> +	if (sts & SWRM_INTERRUPT_STATUS_CMD_ERROR) {
> +		ctrl->reg_read(ctrl, SWRM_CMD_FIFO_STATUS, &value);
> +		dev_err_ratelimited(ctrl->dev,
> +				    "CMD error, fifo status 0x%x\n",
> +				     value);
> +		ctrl->reg_write(ctrl, SWRM_CMD_FIFO_CMD, 0x1);
> +	}
> +
> +	if ((sts & SWRM_INTERRUPT_STATUS_NEW_SLAVE_ATTACHED) ||
> +	    sts & SWRM_INTERRUPT_STATUS_CHANGE_ENUM_SLAVE_STATUS)
> +		schedule_work(&ctrl->slave_work);

we are in irq thread, so why not do the work here rather than schedule
it?

> +static int qcom_swrm_compute_params(struct sdw_bus *bus)
> +{
> +	struct qcom_swrm_ctrl *ctrl = to_qcom_sdw(bus);
> +	struct sdw_master_runtime *m_rt;
> +	struct sdw_slave_runtime *s_rt;
> +	struct sdw_port_runtime *p_rt;
> +	struct qcom_swrm_port_config *pcfg;
> +	int i = 0;
> +
> +	list_for_each_entry(m_rt, &bus->m_rt_list, bus_node) {
> +		list_for_each_entry(p_rt, &m_rt->port_list, port_node) {
> +			pcfg = &ctrl->pconfig[p_rt->num - 1];
> +			p_rt->transport_params.port_num = p_rt->num;
> +			p_rt->transport_params.sample_interval = pcfg->si + 1;
> +			p_rt->transport_params.offset1 = pcfg->off1;
> +			p_rt->transport_params.offset2 = pcfg->off2;
> +		}
> +
> +		list_for_each_entry(s_rt, &m_rt->slave_rt_list, m_rt_node) {
> +			list_for_each_entry(p_rt, &s_rt->port_list, port_node) {
> +				pcfg = &ctrl->pconfig[i];
> +				p_rt->transport_params.port_num = p_rt->num;
> +				p_rt->transport_params.sample_interval =
> +					pcfg->si + 1;
> +				p_rt->transport_params.offset1 = pcfg->off1;
> +				p_rt->transport_params.offset2 = pcfg->off2;
> +				i++;
> +			}

Can you explain this one, am not sure I understood this. This fn is
supposed to compute and fill up the params, all I can see is filling up!

> +static const struct snd_soc_dai_ops qcom_swrm_pdm_dai_ops = {
> +	.hw_params = qcom_swrm_hw_params,
> +	.prepare = qcom_swrm_prepare,
> +	.hw_free = qcom_swrm_hw_free,
> +	.startup = qcom_swrm_startup,
> +	.shutdown = qcom_swrm_shutdown,
> +        .set_sdw_stream = qcom_swrm_set_sdw_stream,

why does indent look off to me!
-- 
~Vinod