From 9b5884a0c60b7194fd62d48f62f893f353f41eb4 Mon Sep 17 00:00:00 2001
From: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Date: Mon, 5 Aug 2019 19:55:08 -0500
Subject: [PATCH] soundwire: cadence_master: revisit interrupt settings
Git-commit: 9b5884a0c60b7194fd62d48f62f893f353f41eb4
Patch-mainline: v5.4-rc1
References: jsc#SLE-16518
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>
Link: https://lore.kernel.org/r/20190806005522.22642-4-pierre-louis.bossart@linux.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/soundwire/cadence_master.c | 29 +++++++++++++++++++++++++----
1 file changed, 25 insertions(+), 4 deletions(-)
diff --git a/drivers/soundwire/cadence_master.c b/drivers/soundwire/cadence_master.c
index dc2d7227a068..89974bbe64c7 100644
--- a/drivers/soundwire/cadence_master.c
+++ b/drivers/soundwire/cadence_master.c
@@ -75,9 +75,12 @@
#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
@@ -575,6 +578,11 @@ 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");
@@ -642,10 +650,23 @@ static int _cdns_enable_interrupt(struct sdw_cdns *cdns)
cdns_writel(cdns, CDNS_MCP_SLAVE_INTMASK1,
CDNS_MCP_SLAVE_INTMASK1_MASK);
- 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;
+ /* enable detection of all slave state changes */
+ mask = CDNS_MCP_INT_SLAVE_MASK;
+
+ /* 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;
+
+ /*
+ * CDNS_MCP_INT_IRQ needs to be set otherwise all previous
+ * settings are irrelevant
+ */
+ mask |= CDNS_MCP_INT_IRQ;
cdns_writel(cdns, CDNS_MCP_INTMASK, mask);
--
2.16.4