soundwire: qcom: handle command ignored interrupt

Qualcomm Soundwire v2.0.0 controller comes with new interrupt bit for
ignored commands.  Add code to handle it in the interrupt service
routine.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20230728112848.67092-2-krzysztof.kozlowski@linaro.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>

diff --git a/drivers/soundwire/qcom.c b/drivers/soundwire/qcom.c
index 3f40e348f6fbfd0d12f7ab49e0f77f14b2ab048d..d0bb995a59ef4b050e64f2bf6ab8a8f829faaeb2 100644 (file)
--- a/drivers/soundwire/qcom.c
+++ b/drivers/soundwire/qcom.c
@@ -60,6 +60,7 @@
 #define SWRM_INTERRUPT_STATUS_BUS_RESET_FINISHED_V2            BIT(13)
 #define SWRM_INTERRUPT_STATUS_CLK_STOP_FINISHED_V2             BIT(14)
 #define SWRM_INTERRUPT_STATUS_EXT_CLK_STOP_WAKEUP              BIT(16)
+#define SWRM_INTERRUPT_STATUS_CMD_IGNORED_AND_EXEC_CONTINUED   BIT(19)
 #define SWRM_INTERRUPT_MAX                                     17
 #define SWRM_V1_3_INTERRUPT_MASK_ADDR                          0x204
 #define SWRM_V1_3_INTERRUPT_CLEAR                              0x208
@@ -776,6 +777,17 @@ static irqreturn_t qcom_swrm_irq_handler(int irq, void *dev_id)
                                break;
                        case SWRM_INTERRUPT_STATUS_EXT_CLK_STOP_WAKEUP:
                                break;
+                       case SWRM_INTERRUPT_STATUS_CMD_IGNORED_AND_EXEC_CONTINUED:
+                               ctrl->reg_read(ctrl,
+                                              ctrl->reg_layout[SWRM_REG_CMD_FIFO_STATUS],
+                                              &value);
+                               dev_err(ctrl->dev,
+                                       "%s: SWR CMD ignored, fifo status %x\n",
+                                       __func__, value);
+
+                               /* Wait 3.5ms to clear */
+                               usleep_range(3500, 3505);
+                               break;
                        default:
                                dev_err_ratelimited(ctrl->dev,
                                                "%s: SWR unknown interrupt value: %d\n",