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| author | Harry Wentland <harry.wentland@amd.com> | 2019-01-30 15:45:18 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-03-23 20:11:39 +0100 |
| commit | c61d88f39491cb9105a83b770b195cbd1b836c4a (patch) | |
| tree | 4f6894ab9a8451ace393f0ad2dc8a869d5fd8096 /drivers/gpu/drm/amd | |
| parent | ea7da9ef23a08f21ccd194d8e86f07f164788820 (diff) | |
| download | blackbird-obmc-linux-c61d88f39491cb9105a83b770b195cbd1b836c4a.tar.gz blackbird-obmc-linux-c61d88f39491cb9105a83b770b195cbd1b836c4a.zip | |
drm/amd/display: don't call dm_pp_ function from an fpu block
commit 59d3191f14dc18881fec1172c7096b7863622803 upstream.
Powerplay functions called from dm_pp_* functions tend to do a
mutex_lock which isn't safe to do inside a kernel_fpu_begin/end block as
those will disable/enable preemption.
Rearrange the dm_pp_get_clock_levels_by_type_with_voltage calls to make
sure they happen outside of kernel_fpu_begin/end.
Cc: stable@vger.kernel.org
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/gpu/drm/amd')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/calcs/dcn_calcs.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/calcs/dcn_calcs.c b/drivers/gpu/drm/amd/display/dc/calcs/dcn_calcs.c index 43e4a2be0fa6..57cc11d0e9a5 100644 --- a/drivers/gpu/drm/amd/display/dc/calcs/dcn_calcs.c +++ b/drivers/gpu/drm/amd/display/dc/calcs/dcn_calcs.c @@ -1355,12 +1355,12 @@ void dcn_bw_update_from_pplib(struct dc *dc) struct dm_pp_clock_levels_with_voltage fclks = {0}, dcfclks = {0}; bool res; - kernel_fpu_begin(); - /* TODO: This is not the proper way to obtain fabric_and_dram_bandwidth, should be min(fclk, memclk) */ res = dm_pp_get_clock_levels_by_type_with_voltage( ctx, DM_PP_CLOCK_TYPE_FCLK, &fclks); + kernel_fpu_begin(); + if (res) res = verify_clock_values(&fclks); @@ -1379,9 +1379,13 @@ void dcn_bw_update_from_pplib(struct dc *dc) } else BREAK_TO_DEBUGGER(); + kernel_fpu_end(); + res = dm_pp_get_clock_levels_by_type_with_voltage( ctx, DM_PP_CLOCK_TYPE_DCFCLK, &dcfclks); + kernel_fpu_begin(); + if (res) res = verify_clock_values(&dcfclks); |
