First, we were calling mc_stop() at the top of the function
which turns off all MC (memory controller) clients,
then checking if the GPU is idle. If it was idle we
returned without re-enabling the MC clients which would
lead to a blank screen, etc. This patch checks if the
GPU is idle before calling mc_stop().
Second, if the reset failed, we were returning without
re-enabling the MC clients. This patch re-enables
the MC clients before returning regardless of whether
the reset was successful or not.
Signed-off-by: Alex Deucher <alexdeucher@xxxxxxxxx>
Cc: Jerome Glisse <jglisse@xxxxxxxxxx>
---
drivers/gpu/drm/radeon/r100.c | 11 ++++++-----
drivers/gpu/drm/radeon/r300.c | 11 ++++++-----
drivers/gpu/drm/radeon/rs600.c | 16 ++++++++--------
3 files changed, 20 insertions(+), 18 deletions(-)
diff --git a/drivers/gpu/drm/radeon/r100.c b/drivers/gpu/drm/radeon/r100.c
index f637595..46da514 100644
--- a/drivers/gpu/drm/radeon/r100.c
+++ b/drivers/gpu/drm/radeon/r100.c
@@ -2086,12 +2086,13 @@ int r100_asic_reset(struct radeon_device *rdev)
{
struct r100_mc_save save;
u32 status, tmp;
+ int ret = 0;
- r100_mc_stop(rdev, &save);
status = RREG32(R_000E40_RBBM_STATUS);
if (!G_000E40_GUI_ACTIVE(status)) {
return 0;
}
+ r100_mc_stop(rdev, &save);
status = RREG32(R_000E40_RBBM_STATUS);
dev_info(rdev->dev, "(%s:%d) RBBM_STATUS=0x%08X\n", __func__, __LINE__, status);
/* stop CP */
@@ -2131,11 +2132,11 @@ int r100_asic_reset(struct radeon_device *rdev)
G_000E40_TAM_BUSY(status) || G_000E40_PB_BUSY(status)) {
dev_err(rdev->dev, "failed to reset GPU\n");
rdev->gpu_lockup = true;
- return -1;
- }
+ ret = -1;
+ } else
+ dev_info(rdev->dev, "GPU reset succeed\n");
r100_mc_resume(rdev, &save);
- dev_info(rdev->dev, "GPU reset succeed\n");
- return 0;
+ return ret;
}
void r100_set_common_regs(struct radeon_device *rdev)
diff --git a/drivers/gpu/drm/radeon/r300.c b/drivers/gpu/drm/radeon/r300.c
index fae5e70..cf862ca 100644
--- a/drivers/gpu/drm/radeon/r300.c
+++ b/drivers/gpu/drm/radeon/r300.c
@@ -405,12 +405,13 @@ int r300_asic_reset(struct radeon_device *rdev)
{
struct r100_mc_save save;
u32 status, tmp;
+ int ret = 0;
- r100_mc_stop(rdev, &save);
status = RREG32(R_000E40_RBBM_STATUS);
if (!G_000E40_GUI_ACTIVE(status)) {
return 0;
}
+ r100_mc_stop(rdev, &save);
status = RREG32(R_000E40_RBBM_STATUS);
dev_info(rdev->dev, "(%s:%d) RBBM_STATUS=0x%08X\n", __func__, __LINE__, status);
/* stop CP */
@@ -451,11 +452,11 @@ int r300_asic_reset(struct radeon_device *rdev)
if (G_000E40_GA_BUSY(status) || G_000E40_VAP_BUSY(status)) {
dev_err(rdev->dev, "failed to reset GPU\n");
rdev->gpu_lockup = true;
- return -1;
- }
+ ret = -1;
+ } else
+ dev_info(rdev->dev, "GPU reset succeed\n");
r100_mc_resume(rdev, &save);
- dev_info(rdev->dev, "GPU reset succeed\n");
- return 0;
+ return ret;
}
/*
diff --git a/drivers/gpu/drm/radeon/rs600.c b/drivers/gpu/drm/radeon/rs600.c
index b4192ac..5afe294 100644
--- a/drivers/gpu/drm/radeon/rs600.c
+++ b/drivers/gpu/drm/radeon/rs600.c
@@ -339,16 +339,16 @@ void rs600_bm_disable(struct radeon_device *rdev)
int rs600_asic_reset(struct radeon_device *rdev)
{
- u32 status, tmp;
-
struct rv515_mc_save save;
+ u32 status, tmp;
+ int ret = 0;
- /* Stops all mc clients */
- rv515_mc_stop(rdev, &save);
status = RREG32(R_000E40_RBBM_STATUS);
if (!G_000E40_GUI_ACTIVE(status)) {
return 0;
}
+ /* Stops all mc clients */
+ rv515_mc_stop(rdev, &save);
status = RREG32(R_000E40_RBBM_STATUS);
dev_info(rdev->dev, "(%s:%d) RBBM_STATUS=0x%08X\n", __func__, __LINE__, status);
/* stop CP */
@@ -392,11 +392,11 @@ int rs600_asic_reset(struct radeon_device *rdev)
if (G_000E40_GA_BUSY(status) || G_000E40_VAP_BUSY(status)) {
dev_err(rdev->dev, "failed to reset GPU\n");
rdev->gpu_lockup = true;
- return -1;
- }
+ ret = -1;
+ } else
+ dev_info(rdev->dev, "GPU reset succeed\n");
rv515_mc_resume(rdev, &save);
- dev_info(rdev->dev, "GPU reset succeed\n");
- return 0;
+ return ret;
}
/*
--
1.7.1.1
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