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drm/radeon/kms: balance asic_reset functions 

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@gmail.com>
Cc: Jerome Glisse <jglisse@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Alex Deucher 2011-01-11 13:36:55 -05:00 committed by Dave Airlie
parent fd909c3718
commit 25b2ec5b64
3 changed files with 20 additions and 18 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
drivers/gpu/drm/radeon/r100.c
View File

@ -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)

11
drivers/gpu/drm/radeon/r300.c
View File

@ -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;
}
/*

16
drivers/gpu/drm/radeon/rs600.c
View File

@ -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;
}
/*