On 8/22/19 3:30 PM, Alex Deucher wrote:
> Add a dcfeaturemask flag for mclk switching. Disable by default;
> enable once the feature has seen more testing.
>
> Set amdgpu.dcfeaturemask=2 on the kernel command line in grub
> to enable this.
>
> Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Patches 3 and 4 are
Reviewed-by: Nicholas Kazlauskas <nicholas.kazlauskas@xxxxxxx>
> ---
> drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 3 +++
> drivers/gpu/drm/amd/display/dc/calcs/dce_calcs.c | 5 ++++-
> drivers/gpu/drm/amd/display/dc/dc.h | 2 +-
> drivers/gpu/drm/amd/include/amd_shared.h | 1 +
> 4 files changed, 9 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
> index 45298269744d..cb86ccf48bd9 100644
> --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
> +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
> @@ -694,6 +694,9 @@ static int amdgpu_dm_init(struct amdgpu_device *adev)
> if (amdgpu_dc_feature_mask & DC_FBC_MASK)
> init_data.flags.fbc_support = true;
>
> + if (amdgpu_dc_feature_mask & DC_MULTI_MON_PP_MCLK_SWITCH_MASK)
> + init_data.flags.multi_mon_pp_mclk_switch = true;
> +
> init_data.flags.power_down_display_on_boot = true;
>
> #ifdef CONFIG_DRM_AMD_DC_DCN2_0
> diff --git a/drivers/gpu/drm/amd/display/dc/calcs/dce_calcs.c b/drivers/gpu/drm/amd/display/dc/calcs/dce_calcs.c
> index eca681d9d7f5..a1d49256fab7 100644
> --- a/drivers/gpu/drm/amd/display/dc/calcs/dce_calcs.c
> +++ b/drivers/gpu/drm/amd/display/dc/calcs/dce_calcs.c
> @@ -3025,7 +3025,10 @@ bool bw_calcs(struct dc_context *ctx,
>
> populate_initial_data(pipe, pipe_count, data);
>
> - calcs_output->all_displays_in_sync = all_displays_in_sync(pipe, pipe_count);
> + if (ctx->dc->config.multi_mon_pp_mclk_switch)
> + calcs_output->all_displays_in_sync = all_displays_in_sync(pipe, pipe_count);
> + else
> + calcs_output->all_displays_in_sync = false;
>
> if (data->number_of_displays != 0) {
> uint8_t yclk_lvl, sclk_lvl;
> diff --git a/drivers/gpu/drm/amd/display/dc/dc.h b/drivers/gpu/drm/amd/display/dc/dc.h
> index 3ef269f82478..5d4a2a9228f0 100644
> --- a/drivers/gpu/drm/amd/display/dc/dc.h
> +++ b/drivers/gpu/drm/amd/display/dc/dc.h
> @@ -220,7 +220,7 @@ struct dc_config {
> bool power_down_display_on_boot;
> bool edp_not_connected;
> bool forced_clocks;
> -
> + bool multi_mon_pp_mclk_switch;
> };
>
> enum visual_confirm {
> diff --git a/drivers/gpu/drm/amd/include/amd_shared.h b/drivers/gpu/drm/amd/include/amd_shared.h
> index a0a7211438f2..8889aaceec60 100644
> --- a/drivers/gpu/drm/amd/include/amd_shared.h
> +++ b/drivers/gpu/drm/amd/include/amd_shared.h
> @@ -142,6 +142,7 @@ enum PP_FEATURE_MASK {
>
> enum DC_FEATURE_MASK {
> DC_FBC_MASK = 0x1,
> + DC_MULTI_MON_PP_MCLK_SWITCH_MASK = 0x2,
> };
>
> enum amd_dpm_forced_level;
>
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