Re: [PATCH v2 3/3] remoteproc: qcom: Add msm8996 specific changes in mss rproc driver.

[Stephen Boyd]

On 01/30, Avaneesh Kumar Dwivedi wrote:
> diff --git a/drivers/remoteproc/qcom_q6v5_pil.c b/drivers/remoteproc/qcom_q6v5_pil.c
> index 35eee68..9c12a36 100644
> --- a/drivers/remoteproc/qcom_q6v5_pil.c
> +++ b/drivers/remoteproc/qcom_q6v5_pil.c
> @@ -485,35 +497,99 @@ static int q6v5_rmb_mba_wait(struct q6v5 *qproc, u32 status, int ms)
>  
>  static int q6v5proc_reset(struct q6v5 *qproc)
>  {
> -	u32 val;
> +	u64 val;

Why u64? There isn't any readq/writeq usage here.

>  	int ret;
> +	int i;
>  
[...]
> +	if (qproc->version == MSS_MSM8996) {
> +		/* Override the ACC value if required */
> +		writel(QDSP6SS_ACC_OVERRIDE_VAL,
> +			qproc->reg_base + QDSP6SS_STRAP_ACC);
> +
> +		/* Assert resets, stop core */
> +		val = readl(qproc->reg_base + QDSP6SS_RESET_REG);
> +		val |= (Q6SS_CORE_ARES | Q6SS_BUS_ARES_ENABLE | Q6SS_STOP_CORE);

Useless parenthesis.

> +		writel(val, qproc->reg_base + QDSP6SS_RESET_REG);
> +
> +		/* BHS require xo cbcr to be enabled */
> +		val = readl(qproc->reg_base + QDSP6SS_XO_CBCR);
> +		val |= 0x1;
> +		writel(val, qproc->reg_base + QDSP6SS_XO_CBCR);
>  
> +		/* Read CLKOFF bit to go low indicating CLK is enabled */
> +		ret = readl_poll_timeout(qproc->reg_base + QDSP6SS_XO_CBCR,
> +				val, !(val & BIT(31)), 1, HALT_CHECK_MAX_LOOPS);
> +		if (ret) {
> +			dev_err(qproc->dev,
> +				"xo cbcr enabling timed out (rc:%d)\n", ret);
> +			return ret;
> +		}
> +		/* Enable power block headswitch and wait for it to stabilize */
> +		val = readl(qproc->reg_base + QDSP6SS_PWR_CTL_REG);
> +		val |= QDSP6v56_BHS_ON;
> +		writel(val, qproc->reg_base + QDSP6SS_PWR_CTL_REG);
> +		val |= readl(qproc->reg_base + QDSP6SS_PWR_CTL_REG);
> +		udelay(1);
> +
> +		/* Put LDO in bypass mode */
> +		val |= QDSP6v56_LDO_BYP;
> +		writel(val, qproc->reg_base + QDSP6SS_PWR_CTL_REG);
> +
> +		/* Deassert QDSP6 compiler memory clamp */
> +		val = readl(qproc->reg_base + QDSP6SS_PWR_CTL_REG);
> +		val &= ~QDSP6v56_CLAMP_QMC_MEM;
> +		writel(val, qproc->reg_base + QDSP6SS_PWR_CTL_REG);
> +
> +		/* Deassert memory peripheral sleep and L2 memory standby */
> +		val |= (Q6SS_L2DATA_STBY_N | Q6SS_SLP_RET_N);

Useless parenthesis.

> +		writel(val, qproc->reg_base + QDSP6SS_PWR_CTL_REG);
> +
> +		/* Turn on L1, L2, ETB and JU memories 1 at a time */
> +		val = readl(qproc->reg_base + QDSP6SS_MEM_PWR_CTL);
> +		for (i = 19; i >= 0; i--) {
> +			val |= BIT(i);
> +			writel(val, qproc->reg_base +
> +						QDSP6SS_MEM_PWR_CTL);
> +			/*
> +			 * Read back value to ensure the write is done then
> +			 * wait for 1us for both memory peripheral and data
> +			 * array to turn on.
> +			 */
> +			val |= readl(qproc->reg_base + QDSP6SS_MEM_PWR_CTL);
> +			udelay(1);
> +		}
> +		/* Remove word line clamp */
> +		val = readl(qproc->reg_base + QDSP6SS_PWR_CTL_REG);
> +		val &= ~QDSP6v56_CLAMP_WL;
> +		writel(val, qproc->reg_base + QDSP6SS_PWR_CTL_REG);
> +	} else {
> +		/* Assert resets, stop core */
> +		val = readl(qproc->reg_base + QDSP6SS_RESET_REG);
> +		val |= (Q6SS_CORE_ARES | Q6SS_BUS_ARES_ENABLE | Q6SS_STOP_CORE);

Useless parenthesis.

> +		writel(val, qproc->reg_base + QDSP6SS_RESET_REG);
> +
> +		/* Enable power block headswitch and wait for it to stabilize */
> +		val = readl(qproc->reg_base + QDSP6SS_PWR_CTL_REG);
> +		val |= QDSS_BHS_ON | QDSS_LDO_BYP;
> +		writel(val, qproc->reg_base + QDSP6SS_PWR_CTL_REG);
> +		val |= readl(qproc->reg_base + QDSP6SS_PWR_CTL_REG);
> +		udelay(1);
> @@ -849,6 +925,7 @@ static int q6v5_stop(struct rproc *rproc)
>  {
>  	struct q6v5 *qproc = (struct q6v5 *)rproc->priv;
>  	int ret;
> +	int val;

u32 instead of int?

>  
>  	qproc->running = false;
>  
> @@ -866,6 +943,15 @@ static int q6v5_stop(struct rproc *rproc)
>  	q6v5proc_halt_axi_port(qproc, qproc->halt_map, qproc->halt_modem);
>  	q6v5proc_halt_axi_port(qproc, qproc->halt_map, qproc->halt_nc);
>  
> +	if (qproc->version == MSS_MSM8996) {
> +		/*
> +		 * To avoid high MX current during LPASS/MSS restart.
> +		 */

Three lines could be one line comment instead. 

> +		val = readl(qproc->reg_base + QDSP6SS_PWR_CTL_REG);
> +		val |= Q6SS_CLAMP_IO | QDSP6v56_CLAMP_WL |
> +			QDSP6v56_CLAMP_QMC_MEM;
> +		writel(val, qproc->reg_base + QDSP6SS_PWR_CTL_REG);
> +	}
>  	reset_control_assert(qproc->mss_restart);
>  	q6v5_clk_disable(qproc->dev, qproc->active_clks,
>  				qproc->active_clk_count);
> @@ -1213,6 +1299,47 @@ static int q6v5_remove(struct platform_device *pdev)
>  	return 0;
>  }
>  
> +static const struct rproc_hexagon_res msm8996_mss = {
> +	.hexagon_mba_image = "mba.mbn",
> +	.proxy_supply = (struct qcom_mss_reg_res[]) {
> +		{
> +			.supply = "vdd_mx",
> +			.uV = 6,
> +		},
> +		{
> +			.supply = "vdd_cx",
> +			.uV = 7,
> +			.uA = 100000,
> +		},

vdd cx and vdd mx are corners. The plan is to _not_ use the
regulator framework for those, so treating them like supplies is
incorrect here.

> +		{
> +			.supply = "vdd_pll",
> +			.uV = 1800000,
> +			.uA = 100000,
> +		},
> +		{}
> +	},

-- 
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