dcn20_resource_construct() includes a number of kzalloc(GFP_KERNEL)
calls which can sleep, but kernel_fpu_begin() disables preemption and
sleeping in this context is invalid.
The only places the FPU appears to be required is in the
init_soc_bounding_box() function and when calculating the
{min,max}_fill_clk_mhz. Narrow the scope to just these two parts to
avoid sleeping while using the FPU.
Fixes: 7a8a3430be15 ("amdgpu: Wrap FPU dependent functions in dc20")
Cc: Timothy Pearson <tpearson@xxxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Jeremy Cline <jcline@xxxxxxxxxx>
---
drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c
index e04ecf0fc0db..a4fa5bf016c1 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c
@@ -3622,6 +3622,7 @@ static bool init_soc_bounding_box(struct dc *dc,
if (bb && ASICREV_IS_NAVI12_P(dc->ctx->asic_id.hw_internal_rev)) {
int i;
+ DC_FP_START();
dcn2_0_nv12_soc.sr_exit_time_us =
fixed16_to_double_to_cpu(bb->sr_exit_time_us);
dcn2_0_nv12_soc.sr_enter_plus_exit_time_us =
@@ -3721,6 +3722,7 @@ static bool init_soc_bounding_box(struct dc *dc,
dcn2_0_nv12_soc.clock_limits[i].dram_speed_mts =
fixed16_to_double_to_cpu(bb->clock_limits[i].dram_speed_mts);
}
+ DC_FP_END();
}
if (pool->base.pp_smu) {
@@ -3777,8 +3779,6 @@ static bool dcn20_resource_construct(
enum dml_project dml_project_version =
get_dml_project_version(ctx->asic_id.hw_internal_rev);
- DC_FP_START();
-
ctx->dc_bios->regs = &bios_regs;
pool->base.funcs = &dcn20_res_pool_funcs;
@@ -3959,8 +3959,10 @@ static bool dcn20_resource_construct(
ranges.reader_wm_sets[i].wm_inst = i;
ranges.reader_wm_sets[i].min_drain_clk_mhz = PP_SMU_WM_SET_RANGE_CLK_UNCONSTRAINED_MIN;
ranges.reader_wm_sets[i].max_drain_clk_mhz = PP_SMU_WM_SET_RANGE_CLK_UNCONSTRAINED_MAX;
+ DC_FP_START();
ranges.reader_wm_sets[i].min_fill_clk_mhz = (i > 0) ? (loaded_bb->clock_limits[i - 1].dram_speed_mts / 16) + 1 : 0;
ranges.reader_wm_sets[i].max_fill_clk_mhz = loaded_bb->clock_limits[i].dram_speed_mts / 16;
+ DC_FP_END();
ranges.num_reader_wm_sets = i + 1;
}
@@ -4125,12 +4127,10 @@ static bool dcn20_resource_construct(
pool->base.oem_device = NULL;
}
- DC_FP_END();
return true;
create_fail:
- DC_FP_END();
dcn20_resource_destruct(pool);
return false;
--
2.28.0
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