From: Daniel Miess daniel.miess@amd.com
commit 85e41f1ed5d94a26fe4e57003c399936d291ed70 upstream.
[Why] RCO is causing error messages on some DCN314 systems
[How] Force disable RCO for DCN314
Fixes: 17fbdbda9cc8 ("drm/amd/display: Enable dcn314 DPP RCO") Reviewed-by: Nicholas Kazlauskas nicholas.kazlauskas@amd.com Acked-by: Hamza Mahfooz hamza.mahfooz@amd.com Signed-off-by: Daniel Miess daniel.miess@amd.com Signed-off-by: Alex Deucher alexander.deucher@amd.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/gpu/drm/amd/display/dc/dcn314/dcn314_dccg.c | 2 +- drivers/gpu/drm/amd/display/dc/dcn314/dcn314_resource.c | 4 ++++ 2 files changed, 5 insertions(+), 1 deletion(-)
--- a/drivers/gpu/drm/amd/display/dc/dcn314/dcn314_dccg.c +++ b/drivers/gpu/drm/amd/display/dc/dcn314/dcn314_dccg.c @@ -322,7 +322,7 @@ static void dccg314_dpp_root_clock_contr { struct dcn_dccg *dccg_dcn = TO_DCN_DCCG(dccg);
- if (dccg->dpp_clock_gated[dpp_inst] == clock_on) + if (dccg->dpp_clock_gated[dpp_inst] != clock_on) return;
if (clock_on) { --- a/drivers/gpu/drm/amd/display/dc/dcn314/dcn314_resource.c +++ b/drivers/gpu/drm/amd/display/dc/dcn314/dcn314_resource.c @@ -1936,6 +1936,10 @@ static bool dcn314_resource_construct( dc->debug = debug_defaults_drv; else dc->debug = debug_defaults_diags; + + /* Disable root clock optimization */ + dc->debug.root_clock_optimization.u32All = 0; + // Init the vm_helper if (dc->vm_helper) vm_helper_init(dc->vm_helper, 16);