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SubjectRe: [RFC PATCH 12/40] soundwire: cadence_master: revisit interrupt settings
On 25-07-19, 18:40, Pierre-Louis Bossart wrote:
> Adding missing interrupt masks (parity, etc) and missing checks.
> Clarify which masks are for which usage.
>
> Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
> Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
> ---
> drivers/soundwire/cadence_master.c | 25 ++++++++++++++++++++++---
> 1 file changed, 22 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/soundwire/cadence_master.c b/drivers/soundwire/cadence_master.c
> index bdc3ed844829..0f3b9c160b01 100644
> --- a/drivers/soundwire/cadence_master.c
> +++ b/drivers/soundwire/cadence_master.c
> @@ -76,9 +76,12 @@
> #define CDNS_MCP_INT_DPINT BIT(11)
> #define CDNS_MCP_INT_CTRL_CLASH BIT(10)
> #define CDNS_MCP_INT_DATA_CLASH BIT(9)
> +#define CDNS_MCP_INT_PARITY BIT(8)
> #define CDNS_MCP_INT_CMD_ERR BIT(7)
> +#define CDNS_MCP_INT_RX_NE BIT(3)
> #define CDNS_MCP_INT_RX_WL BIT(2)
> #define CDNS_MCP_INT_TXE BIT(1)
> +#define CDNS_MCP_INT_TXF BIT(0)
>
> #define CDNS_MCP_INTSET 0x4C
>
> @@ -689,6 +692,11 @@ irqreturn_t sdw_cdns_irq(int irq, void *dev_id)
> }
> }
>
> + if (int_status & CDNS_MCP_INT_PARITY) {
> + /* Parity error detected by Master */
> + dev_err_ratelimited(cdns->dev, "Parity error\n");
> + }
> +
> if (int_status & CDNS_MCP_INT_CTRL_CLASH) {
> /* Slave is driving bit slot during control word */
> dev_err_ratelimited(cdns->dev, "Bus clash for control word\n");
> @@ -761,10 +769,21 @@ int sdw_cdns_enable_interrupt(struct sdw_cdns *cdns)
> cdns_writel(cdns, CDNS_MCP_SLAVE_INTMASK1,
> CDNS_MCP_SLAVE_INTMASK1_MASK);
>
> + /* enable detection of slave state changes */
> mask = CDNS_MCP_INT_SLAVE_RSVD | CDNS_MCP_INT_SLAVE_ALERT |
> - CDNS_MCP_INT_SLAVE_ATTACH | CDNS_MCP_INT_SLAVE_NATTACH |
> - CDNS_MCP_INT_CTRL_CLASH | CDNS_MCP_INT_DATA_CLASH |
> - CDNS_MCP_INT_RX_WL | CDNS_MCP_INT_IRQ | CDNS_MCP_INT_DPINT;
> + CDNS_MCP_INT_SLAVE_ATTACH | CDNS_MCP_INT_SLAVE_NATTACH;
> +
> + /* enable detection of bus issues */
> + mask |= CDNS_MCP_INT_CTRL_CLASH | CDNS_MCP_INT_DATA_CLASH |
> + CDNS_MCP_INT_PARITY;
> +
> + /* no detection of port interrupts for now */
> +
> + /* enable detection of RX fifo level */
> + mask |= CDNS_MCP_INT_RX_WL;
> +
> + /* now enable all of the above */

I think this comment seems is at wrong line..?

> + mask |= CDNS_MCP_INT_IRQ;
>
> cdns_writel(cdns, CDNS_MCP_INTMASK, mask);
>
> --
> 2.20.1

--
~Vinod

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