This is a note to let you know that I've just added the patch titled
accel/ivpu/37xx: Fix missing VPUIP interrupts
to the 6.5-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
accel-ivpu-37xx-fix-missing-vpuip-interrupts.patch
and it can be found in the queue-6.5 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From b132ac51d7a50c37683be56c96ff64f8c887930f Mon Sep 17 00:00:00 2001
From: Karol Wachowski <karol.wachowski@xxxxxxxxxxxxxxx>
Date: Tue, 24 Oct 2023 18:19:52 +0200
Subject: accel/ivpu/37xx: Fix missing VPUIP interrupts
From: Karol Wachowski <karol.wachowski@xxxxxxxxxxxxxxx>
commit b132ac51d7a50c37683be56c96ff64f8c887930f upstream.
Move sequence of masking and unmasking global interrupts from buttress
interrupt handler to generic one that handles both VPUIP and BTRS
interrupts. Unmasking global interrupts will re-trigger MSI for any
pending interrupts.
Lack of this sequence will cause the driver to miss any
VPUIP interrupt that comes after reading VPU_37XX_HOST_SS_ICB_STATUS_0
and before clearing all active interrupt sources.
Fixes: 35b137630f08 ("accel/ivpu: Introduce a new DRM driver for Intel VPU")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Karol Wachowski <karol.wachowski@xxxxxxxxxxxxxxx>
Reviewed-by: Stanislaw Gruszka <stanislaw.gruszka@xxxxxxxxxxxxxxx>
Signed-off-by: Stanislaw Gruszka <stanislaw.gruszka@xxxxxxxxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20231024161952.759914-1-stanislaw.gruszka@xxxxxxxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/accel/ivpu/ivpu_hw_mtl.c | 11 +++++------
1 file changed, 5 insertions(+), 6 deletions(-)
--- a/drivers/accel/ivpu/ivpu_hw_mtl.c
+++ b/drivers/accel/ivpu/ivpu_hw_mtl.c
@@ -953,9 +953,6 @@ static u32 ivpu_hw_mtl_irqb_handler(stru
if (status == 0)
return 0;
- /* Disable global interrupt before handling local buttress interrupts */
- REGB_WR32(MTL_BUTTRESS_GLOBAL_INT_MASK, 0x1);
-
if (REG_TEST_FLD(MTL_BUTTRESS_INTERRUPT_STAT, FREQ_CHANGE, status))
ivpu_dbg(vdev, IRQ, "FREQ_CHANGE irq: %08x", REGB_RD32(MTL_BUTTRESS_CURRENT_PLL));
@@ -986,9 +983,6 @@ static u32 ivpu_hw_mtl_irqb_handler(stru
else
REGB_WR32(MTL_BUTTRESS_INTERRUPT_STAT, status);
- /* Re-enable global interrupt */
- REGB_WR32(MTL_BUTTRESS_GLOBAL_INT_MASK, 0x0);
-
if (schedule_recovery)
ivpu_pm_schedule_recovery(vdev);
@@ -1000,9 +994,14 @@ static irqreturn_t ivpu_hw_mtl_irq_handl
struct ivpu_device *vdev = ptr;
u32 ret_irqv, ret_irqb;
+ REGB_WR32(MTL_BUTTRESS_GLOBAL_INT_MASK, 0x1);
+
ret_irqv = ivpu_hw_mtl_irqv_handler(vdev, irq);
ret_irqb = ivpu_hw_mtl_irqb_handler(vdev, irq);
+ /* Re-enable global interrupts to re-trigger MSI for pending interrupts */
+ REGB_WR32(MTL_BUTTRESS_GLOBAL_INT_MASK, 0x0);
+
return IRQ_RETVAL(ret_irqb | ret_irqv);
}
Patches currently in stable-queue which might be from karol.wachowski@xxxxxxxxxxxxxxx are
queue-6.5/accel-ivpu-37xx-fix-missing-vpuip-interrupts.patch
