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| author | Dillon Varone <Dillon.Varone@amd.com> | 2026-02-18 14:34:28 -0500 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2026-03-02 17:13:52 -0500 |
| commit | 30d937f63bd19bbcaafa4b892eb251f8bbbf04ef (patch) | |
| tree | 77586eb094d440706e92af29100fc108b3ce89f3 /drivers/gpu | |
| parent | 389c2024cab817366e6b8345f679f41064fa94d6 (diff) | |
| download | linux-30d937f63bd19bbcaafa4b892eb251f8bbbf04ef.tar.gz linux-30d937f63bd19bbcaafa4b892eb251f8bbbf04ef.zip | |
drm/amd/display: Fallback to boot snapshot for dispclk
[WHY & HOW]
If the dentist is unavailable, fallback to reading CLKIP via the boot
snapshot to get the current dispclk.
Reviewed-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Signed-off-by: Dillon Varone <Dillon.Varone@amd.com>
Signed-off-by: Alex Hung <alex.hung@amd.com>
Cc: Mario Limonciello <mario.limonciello@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Tested-by: Dan Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit 2ab77600d1e55a042c02437326d3c7563e853c6c)
Cc: stable@vger.kernel.org
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/hwss/dcn401/dcn401_hwseq.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/hwss/dcn401/dcn401_hwseq.c b/drivers/gpu/drm/amd/display/dc/hwss/dcn401/dcn401_hwseq.c index b91517b9fedc..eb198d52a115 100644 --- a/drivers/gpu/drm/amd/display/dc/hwss/dcn401/dcn401_hwseq.c +++ b/drivers/gpu/drm/amd/display/dc/hwss/dcn401/dcn401_hwseq.c @@ -72,7 +72,11 @@ void dcn401_initialize_min_clocks(struct dc *dc) * audio corruption. Read current DISPCLK from DENTIST and request the same * freq to ensure that the timing is valid and unchanged. */ - clocks->dispclk_khz = dc->clk_mgr->funcs->get_dispclk_from_dentist(dc->clk_mgr); + if (dc->clk_mgr->funcs->get_dispclk_from_dentist) { + clocks->dispclk_khz = dc->clk_mgr->funcs->get_dispclk_from_dentist(dc->clk_mgr); + } else { + clocks->dispclk_khz = dc->clk_mgr->boot_snapshot.dispclk * 1000; + } } clocks->ref_dtbclk_khz = dc->clk_mgr->bw_params->clk_table.entries[0].dtbclk_mhz * 1000; clocks->fclk_p_state_change_support = true; |