drm/amd/display: Implement dm_pp_get_clock_levels_by_type_with_latency

This is required so we use the correct minimum clocks for Vega. Without
this pplib will never be able to enter the lowest clock states.

Signed-off-by: Harry Wentland <harry.wentland@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_services.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_services.c
index 0229c7e..ead3d21 100644 (file)
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_services.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_services.c
@@ -234,6 +234,34 @@ static void pp_to_dc_clock_levels(
        }
 }
 
+static void pp_to_dc_clock_levels_with_latency(
+               const struct pp_clock_levels_with_latency *pp_clks,
+               struct dm_pp_clock_levels_with_latency *clk_level_info,
+               enum dm_pp_clock_type dc_clk_type)
+{
+       uint32_t i;
+
+       if (pp_clks->num_levels > DM_PP_MAX_CLOCK_LEVELS) {
+               DRM_INFO("DM_PPLIB: Warning: %s clock: number of levels %d exceeds maximum of %d!\n",
+                               DC_DECODE_PP_CLOCK_TYPE(dc_clk_type),
+                               pp_clks->num_levels,
+                               DM_PP_MAX_CLOCK_LEVELS);
+
+               clk_level_info->num_levels = DM_PP_MAX_CLOCK_LEVELS;
+       } else
+               clk_level_info->num_levels = pp_clks->num_levels;
+
+       DRM_DEBUG("DM_PPLIB: values for %s clock\n",
+                       DC_DECODE_PP_CLOCK_TYPE(dc_clk_type));
+
+       for (i = 0; i < clk_level_info->num_levels; i++) {
+               DRM_DEBUG("DM_PPLIB:\t %d\n", pp_clks->data[i].clocks_in_khz);
+               /* translate 10kHz to kHz */
+               clk_level_info->data[i].clocks_in_khz = pp_clks->data[i].clocks_in_khz;
+               clk_level_info->data[i].latency_in_us = pp_clks->data[i].clocks_in_khz;
+       }
+}
+
 bool dm_pp_get_clock_levels_by_type(
                const struct dc_context *ctx,
                enum dm_pp_clock_type clk_type,
@@ -311,8 +339,22 @@ bool dm_pp_get_clock_levels_by_type_with_latency(
        enum dm_pp_clock_type clk_type,
        struct dm_pp_clock_levels_with_latency *clk_level_info)
 {
-       /* TODO: to be implemented */
-       return false;
+       struct amdgpu_device *adev = ctx->driver_context;
+       void *pp_handle = adev->powerplay.pp_handle;
+       struct pp_clock_levels_with_latency pp_clks = { 0 };
+       const struct amd_pm_funcs *pp_funcs = adev->powerplay.pp_funcs;
+
+       if (!pp_funcs->get_clock_by_type_with_latency)
+               return false;
+
+       if (pp_funcs->get_clock_by_type_with_latency(pp_handle,
+                                                    dc_to_pp_clock_type(clk_type),
+                                                    &pp_clks))
+               return false;
+
+       pp_to_dc_clock_levels_with_latency(&pp_clks, clk_level_info, clk_type);
+
+       return true;
 }
 
 bool dm_pp_get_clock_levels_by_type_with_voltage(