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drm/amd/display: Fix a debugfs null pointer error

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[WHY & HOW]
Check whether get_subvp_en() callback exists before calling it.

Cc: Mario Limonciello <mario.limonciello@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Reviewed-by: Alex Hung <alex.hung@amd.com>
Acked-by: Alex Hung <alex.hung@amd.com>
Signed-off-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Aurabindo Pillai
2023-10-27 15:59:48 -04:00
committed by Alex Deucher
parent f4fac4163c
commit efb91fea65
1 changed files with 5 additions and 1 deletions
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6
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c
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@@ -3647,12 +3647,16 @@ static int capabilities_show(struct seq_file *m, void *unused)
bool mall_supported = dc->caps.mall_size_total;
bool subvp_supported = dc->caps.subvp_fw_processing_delay_us;
unsigned int mall_in_use = false;
unsigned int subvp_in_use = dc->cap_funcs.get_subvp_en(dc, dc->current_state);
unsigned int subvp_in_use = false;
struct hubbub *hubbub = dc->res_pool->hubbub;
if (hubbub->funcs->get_mall_en)
hubbub->funcs->get_mall_en(hubbub, &mall_in_use);
if (dc->cap_funcs.get_subvp_en)
subvp_in_use = dc->cap_funcs.get_subvp_en(dc, dc->current_state);
seq_printf(m, "mall supported: %s, enabled: %s\n",
mall_supported ? "yes" : "no", mall_in_use ? "yes" : "no");
seq_printf(m, "sub-viewport supported: %s, enabled: %s\n",