diff options
| author | Roman Li <Roman.Li@amd.com> | 2026-03-16 23:45:47 +0300 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2026-03-30 21:58:22 +0300 |
| commit | 8de2559ec172b04301d6e53c4f30388e40fad08c (patch) | |
| tree | 7008b9d6bd1715eab21f6a8b790927b59f901af5 | |
| parent | 0b577cd658510b1c2acbee6b089b2a94407cf3ff (diff) | |
| download | linux-8de2559ec172b04301d6e53c4f30388e40fad08c.tar.xz | |
drm/amd/display: Remove invalid DPSTREAMCLK mask usage
[Why]
The invalid register field access causes ASSERT(mask != 0) to fire
in set_reg_field_values() during display enable.
WARNING: at drivers/gpu/drm/amd/amdgpu/../display/dc/dc_helper.c:100
set_reg_field_values.isra.0+0xcf/0xf0 [amdgpu]
Call Trace:
<TASK>
generic_reg_update_ex+0x66/0x1d0 [amdgpu]
dccg401_set_dpstreamclk+0xed/0x350 [amdgpu]
dcn401_enable_stream+0x165/0x370 [amdgpu]
link_set_dpms_on+0x6e9/0xe90 [amdgpu]
dce110_apply_single_controller_ctx_to_hw+0x343/0x530 [amdgpu]
dce110_apply_ctx_to_hw+0x1f6/0x2d0 [amdgpu]
dc_commit_state_no_check+0x49a/0xe20 [amdgpu]
dc_commit_streams+0x354/0x570 [amdgpu]
amdgpu_dm_atomic_commit_tail+0x6f8/0x3fc0 [amdgpu]
DCN4.x hardware does not have DPSTREAMCLK_GATE_DISABLE and
DPSTREAMCLK_ROOT_GATE_DISABLE fields in DCCG_GATE_DISABLE_CNTL3.
These global fields only exist in DCN3.1.x hardware.
[How]
Remove the call that tries to update non-existent fields in CNTL3.
DCN4.x uses per-instance fields in CNTL5 instead,
which are already correctly programmed in the switch cases above.
Reviewed-by: Dillon Varone <dillon.varone@amd.com>
Signed-off-by: Roman Li <Roman.Li@amd.com>
Signed-off-by: Chuanyu Tseng <chuanyu.tseng@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/dccg/dcn401/dcn401_dccg.c | 4 |
1 files changed, 0 insertions, 4 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/dccg/dcn401/dcn401_dccg.c b/drivers/gpu/drm/amd/display/dc/dccg/dcn401/dcn401_dccg.c index 4b9a14c679d3..b6d2ead93345 100644 --- a/drivers/gpu/drm/amd/display/dc/dccg/dcn401/dcn401_dccg.c +++ b/drivers/gpu/drm/amd/display/dc/dccg/dcn401/dcn401_dccg.c @@ -526,10 +526,6 @@ static void dccg401_enable_dpstreamclk(struct dccg *dccg, int otg_inst, int dp_h BREAK_TO_DEBUGGER(); return; } - if (dccg->ctx->dc->debug.root_clock_optimization.bits.dpstream) - REG_UPDATE_2(DCCG_GATE_DISABLE_CNTL3, - DPSTREAMCLK_GATE_DISABLE, 1, - DPSTREAMCLK_ROOT_GATE_DISABLE, 1); } void dccg401_disable_dpstreamclk(struct dccg *dccg, int dp_hpo_inst) |