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drm/amd/display: Block dynamic IPS2 on DCN35 for incompatible FW versions

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[WHY]
Hangs with Z8 can occur if running an older unfixed PMFW version.

[HOW]
Fallback to RCG only for dynamic IPS2 states if it's not newer than
93.12. Limit to DCN35.

Cc: Mario Limonciello <mario.limonciello@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Reviewed-by: Charlene Liu <charlene.liu@amd.com>
Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Signed-off-by: Alex Hung <alex.hung@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Nicholas Kazlauskas
2024-08-27 14:13:10 -04:00
committed by Alex Deucher
parent 09cb922c4e
commit 401c90c4d6
1 changed files with 6 additions and 0 deletions
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drivers/gpu/drm/amd/display/dc/clk_mgr/dcn35/dcn35_clk_mgr.c
+6
View File
@@ -1222,6 +1222,12 @@ void dcn35_clk_mgr_construct(
ctx->dc->debug.disable_dpp_power_gate = false;
ctx->dc->debug.disable_hubp_power_gate = false;
ctx->dc->debug.disable_dsc_power_gate = false;
/* Disable dynamic IPS2 in older PMFW (93.12) for Z8 interop. */
if (ctx->dc->config.disable_ips == DMUB_IPS_ENABLE &&
ctx->dce_version == DCN_VERSION_3_5 &&
((clk_mgr->base.smu_ver & 0x00FFFFFF) <= 0x005d0c00))
ctx->dc->config.disable_ips = DMUB_IPS_RCG_IN_ACTIVE_IPS2_IN_OFF;
} else {
/*let's reset the config control flag*/
ctx->dc->config.disable_ips = DMUB_IPS_DISABLE_ALL; /*pmfw not support it, disable it all*/