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Subject[ 06/12] drm/radeon: dont use get_engine_clock() on APUs
Date
3.0-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Alex Deucher <alexander.deucher@amd.com>

commit bf05d9985111f85ed6922c134567b96eb789283b upstream.

It doesn't work reliably. Just report back the currently
selected engine clock.

Partially fixes:
https://bugs.freedesktop.org/show_bug.cgi?id=62493

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
drivers/gpu/drm/radeon/radeon_pm.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)

--- a/drivers/gpu/drm/radeon/radeon_pm.c
+++ b/drivers/gpu/drm/radeon/radeon_pm.c
@@ -845,7 +845,11 @@ static int radeon_debugfs_pm_info(struct
struct radeon_device *rdev = dev->dev_private;

seq_printf(m, "default engine clock: %u0 kHz\n", rdev->pm.default_sclk);
- seq_printf(m, "current engine clock: %u0 kHz\n", radeon_get_engine_clock(rdev));
+ /* radeon_get_engine_clock is not reliable on APUs so just print the current clock */
+ if ((rdev->family >= CHIP_PALM) && (rdev->flags & RADEON_IS_IGP))
+ seq_printf(m, "current engine clock: %u0 kHz\n", rdev->pm.current_sclk);
+ else
+ seq_printf(m, "current engine clock: %u0 kHz\n", radeon_get_engine_clock(rdev));
seq_printf(m, "default memory clock: %u0 kHz\n", rdev->pm.default_mclk);
if (rdev->asic->get_memory_clock)
seq_printf(m, "current memory clock: %u0 kHz\n", radeon_get_memory_clock(rdev));



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