From: Nicholas Kazlauskas Date: Tue, 27 Aug 2024 18:13:10 +0000 (-0400) Subject: drm/amd/display: Block dynamic IPS2 on DCN35 for incompatible FW versions X-Git-Tag: v6.10.13~140 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d13a338fa80b98b0cecc7e5d7565dfe089e320fc;p=thirdparty%2Fkernel%2Fstable.git drm/amd/display: Block dynamic IPS2 on DCN35 for incompatible FW versions commit 401c90c4d64f2227fc2f4c02d2ad23296bf5ca6f upstream. [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 Cc: Alex Deucher Cc: stable@vger.kernel.org Reviewed-by: Charlene Liu Signed-off-by: Nicholas Kazlauskas Signed-off-by: Alex Hung Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn35/dcn35_clk_mgr.c b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn35/dcn35_clk_mgr.c index 6c9b4e6491a5e..985e847f95803 100644 --- a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn35/dcn35_clk_mgr.c +++ b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn35/dcn35_clk_mgr.c @@ -1149,6 +1149,12 @@ 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*/