6.6-stable review patch. If anyone has any objections, please let me know.
------------------
From: Jacek Lawrynowicz <jacek.lawrynowicz@xxxxxxxxxxxxxxx>
[ Upstream commit 3f7c0634926daf48cd2f6db6c1197a1047074088 ]
There is no need to call MMIO reset using VPU_37XX_BUTTRESS_VPU_IP_RESET
register. IP will be reset by FLR or by entering d0i3. Also IP reset
during power_up is not needed as the VPU is already in reset.
Removing MMIO reset improves stability as it a partial device reset
that is not safe in some corner cases.
This change also brings back ivpu_boot_pwr_domain_disable() that
helps to properly power down VPU when it is hung by a buggy workload.
Signed-off-by: Jacek Lawrynowicz <jacek.lawrynowicz@xxxxxxxxxxxxxxx>
Fixes: 828d63042aec ("accel/ivpu: Don't enter d0i3 during FLR")
Reviewed-by: Jeffrey Hugo <quic_jhugo@xxxxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20231115111004.1304092-1-jacek.lawrynowicz@xxxxxxxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/accel/ivpu/ivpu_hw_37xx.c | 46 +++++++++++++++----------------
1 file changed, 22 insertions(+), 24 deletions(-)
diff --git a/drivers/accel/ivpu/ivpu_hw_37xx.c b/drivers/accel/ivpu/ivpu_hw_37xx.c
index cb9f0196e3ddf..b8010c07eec17 100644
--- a/drivers/accel/ivpu/ivpu_hw_37xx.c
+++ b/drivers/accel/ivpu/ivpu_hw_37xx.c
@@ -536,6 +536,16 @@ static int ivpu_boot_pwr_domain_enable(struct ivpu_device *vdev)
return ret;
}
+static int ivpu_boot_pwr_domain_disable(struct ivpu_device *vdev)
+{
+ ivpu_boot_dpu_active_drive(vdev, false);
+ ivpu_boot_pwr_island_isolation_drive(vdev, true);
+ ivpu_boot_pwr_island_trickle_drive(vdev, false);
+ ivpu_boot_pwr_island_drive(vdev, false);
+
+ return ivpu_boot_wait_for_pwr_island_status(vdev, 0x0);
+}
+
static void ivpu_boot_no_snoop_enable(struct ivpu_device *vdev)
{
u32 val = REGV_RD32(VPU_37XX_HOST_IF_TCU_PTW_OVERRIDES);
@@ -634,25 +644,17 @@ static int ivpu_hw_37xx_info_init(struct ivpu_device *vdev)
static int ivpu_hw_37xx_reset(struct ivpu_device *vdev)
{
- int ret;
- u32 val;
-
- if (IVPU_WA(punit_disabled))
- return 0;
+ int ret = 0;
- ret = REGB_POLL_FLD(VPU_37XX_BUTTRESS_VPU_IP_RESET, TRIGGER, 0, TIMEOUT_US);
- if (ret) {
- ivpu_err(vdev, "Timed out waiting for TRIGGER bit\n");
- return ret;
+ if (ivpu_boot_pwr_domain_disable(vdev)) {
+ ivpu_err(vdev, "Failed to disable power domain\n");
+ ret = -EIO;
}
- val = REGB_RD32(VPU_37XX_BUTTRESS_VPU_IP_RESET);
- val = REG_SET_FLD(VPU_37XX_BUTTRESS_VPU_IP_RESET, TRIGGER, val);
- REGB_WR32(VPU_37XX_BUTTRESS_VPU_IP_RESET, val);
-
- ret = REGB_POLL_FLD(VPU_37XX_BUTTRESS_VPU_IP_RESET, TRIGGER, 0, TIMEOUT_US);
- if (ret)
- ivpu_err(vdev, "Timed out waiting for RESET completion\n");
+ if (ivpu_pll_disable(vdev)) {
+ ivpu_err(vdev, "Failed to disable PLL\n");
+ ret = -EIO;
+ }
return ret;
}
@@ -685,10 +687,6 @@ static int ivpu_hw_37xx_power_up(struct ivpu_device *vdev)
{
int ret;
- ret = ivpu_hw_37xx_reset(vdev);
- if (ret)
- ivpu_warn(vdev, "Failed to reset HW: %d\n", ret);
-
ret = ivpu_hw_37xx_d0i3_disable(vdev);
if (ret)
ivpu_warn(vdev, "Failed to disable D0I3: %d\n", ret);
@@ -756,11 +754,11 @@ static int ivpu_hw_37xx_power_down(struct ivpu_device *vdev)
{
int ret = 0;
- if (!ivpu_hw_37xx_is_idle(vdev) && ivpu_hw_37xx_reset(vdev))
- ivpu_err(vdev, "Failed to reset the VPU\n");
+ if (!ivpu_hw_37xx_is_idle(vdev))
+ ivpu_warn(vdev, "VPU not idle during power down\n");
- if (ivpu_pll_disable(vdev)) {
- ivpu_err(vdev, "Failed to disable PLL\n");
+ if (ivpu_hw_37xx_reset(vdev)) {
+ ivpu_err(vdev, "Failed to reset VPU\n");
ret = -EIO;
}
--
2.42.0
