shinys000114/linux
1
0
Fork 0
mirror of https://github.com/hardkernel/linux.git synced 2026-06-07 11:26:02 +09:00
Code Issues Packages Projects Releases Wiki Activity

drm/amd/display: don't call dm_pp_ function from an fpu block

Browse Source 
commit 59d3191f14 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>
This commit is contained in:
Harry Wentland
2019-01-30 15:45:18 -05:00
committed by Greg Kroah-Hartman
parent 17982c6a64
commit 585715ef18
1 changed files with 6 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
drivers/gpu/drm/amd/display/dc/calcs/dcn_calcs.c
View File

@@ -1347,12 +1347,12 @@ 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);
@@ -1371,9 +1371,13 @@ 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);