drm/amd/display: Move mclk calculation function to DML

The function responsible for calculating the MCLK switching has FPU
operations. This commit moves it to the dcn30_fpu file.

Reviewed-by: Harry Wentland <Harry.Wentland@amd.com>
Acked-by: Alex Hung <alex.hung@amd.com>
Signed-off-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_resource.c b/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_resource.c
index 7f01463..e5e5409 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_resource.c
@@ -2031,44 +2031,6 @@ void dcn30_setup_mclk_switch_using_fw_based_vblank_stretch(struct dc *dc, struct
        context->bw_ctx.bw.dcn.watermarks.a.cstate_pstate.pstate_change_ns = 4U * 1000U * 1000U * 1000U;
 }
 
-/*
- * Finds dummy_latency_index when MCLK switching using firmware based
- * vblank stretch is enabled. This function will iterate through the
- * table of dummy pstate latencies until the lowest value that allows
- * dm_allow_self_refresh_and_mclk_switch to happen is found
- */
-int dcn30_find_dummy_latency_index_for_fw_based_mclk_switch(struct dc *dc, struct dc_state *context,
-               display_e2e_pipe_params_st *pipes, int pipe_cnt, int vlevel)
-{
-       const int max_latency_table_entries = 4;
-       int dummy_latency_index = 0;
-
-       while (dummy_latency_index < max_latency_table_entries) {
-               context->bw_ctx.dml.soc.dram_clock_change_latency_us =
-                               dc->clk_mgr->bw_params->dummy_pstate_table[dummy_latency_index].dummy_pstate_latency_us;
-               dcn30_internal_validate_bw(dc, context, pipes, &pipe_cnt, &vlevel, false);
-
-               if (context->bw_ctx.dml.soc.allow_dram_self_refresh_or_dram_clock_change_in_vblank ==
-                       dm_allow_self_refresh_and_mclk_switch)
-                       break;
-
-               dummy_latency_index++;
-       }
-
-       if (dummy_latency_index == max_latency_table_entries) {
-               ASSERT(dummy_latency_index != max_latency_table_entries);
-               /* If the execution gets here, it means dummy p_states are
-                * not possible. This should never happen and would mean
-                * something is severely wrong.
-                * Here we reset dummy_latency_index to 3, because it is
-                * better to have underflows than system crashes.
-                */
-               dummy_latency_index = 3;
-       }
-
-       return dummy_latency_index;
-}
-
 void dcn30_update_soc_for_wm_a(struct dc *dc, struct dc_state *context)
 {
        DC_FP_START();

diff --git a/drivers/gpu/drm/amd/display/dc/dml/dcn30/dcn30_fpu.c b/drivers/gpu/drm/amd/display/dc/dml/dcn30/dcn30_fpu.c
index c00f759..9e32b45 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/dml/dcn30/dcn30_fpu.c
+++ b/drivers/gpu/drm/amd/display/dc/dml/dcn30/dcn30_fpu.c
@@ -616,6 +616,49 @@ void dcn30_fpu_update_bw_bounding_box(struct dc *dc,
 
 }
 
+/**
+ * Finds dummy_latency_index when MCLK switching using firmware based
+ * vblank stretch is enabled. This function will iterate through the
+ * table of dummy pstate latencies until the lowest value that allows
+ * dm_allow_self_refresh_and_mclk_switch to happen is found
+ */
+int dcn30_find_dummy_latency_index_for_fw_based_mclk_switch(struct dc *dc,
+                                                           struct dc_state *context,
+                                                           display_e2e_pipe_params_st *pipes,
+                                                           int pipe_cnt,
+                                                           int vlevel)
+{
+       const int max_latency_table_entries = 4;
+       int dummy_latency_index = 0;
+
+       dc_assert_fp_enabled();
+
+       while (dummy_latency_index < max_latency_table_entries) {
+               context->bw_ctx.dml.soc.dram_clock_change_latency_us =
+                               dc->clk_mgr->bw_params->dummy_pstate_table[dummy_latency_index].dummy_pstate_latency_us;
+               dcn30_internal_validate_bw(dc, context, pipes, &pipe_cnt, &vlevel, false);
+
+               if (context->bw_ctx.dml.soc.allow_dram_self_refresh_or_dram_clock_change_in_vblank ==
+                       dm_allow_self_refresh_and_mclk_switch)
+                       break;
+
+               dummy_latency_index++;
+       }
+
+       if (dummy_latency_index == max_latency_table_entries) {
+               ASSERT(dummy_latency_index != max_latency_table_entries);
+               /* If the execution gets here, it means dummy p_states are
+                * not possible. This should never happen and would mean
+                * something is severely wrong.
+                * Here we reset dummy_latency_index to 3, because it is
+                * better to have underflows than system crashes.
+                */
+               dummy_latency_index = 3;
+       }
+
+       return dummy_latency_index;
+}
+
 void dcn3_fpu_build_wm_range_table(struct clk_mgr *base)
 {
        /* defaults */

diff --git a/drivers/gpu/drm/amd/display/dc/dml/dcn30/dcn30_fpu.h b/drivers/gpu/drm/amd/display/dc/dml/dcn30/dcn30_fpu.h
index c202405..3e4221a 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/dml/dcn30/dcn30_fpu.h
+++ b/drivers/gpu/drm/amd/display/dc/dml/dcn30/dcn30_fpu.h
@@ -63,6 +63,12 @@ void dcn30_fpu_update_bw_bounding_box(struct dc *dc,
        unsigned int *dcfclk_mhz,
        unsigned int *dram_speed_mts);
 
+int dcn30_find_dummy_latency_index_for_fw_based_mclk_switch(struct dc *dc,
+                                                           struct dc_state *context,
+                                                           display_e2e_pipe_params_st *pipes,
+                                                           int pipe_cnt,
+                                                           int vlevel);
+
 void dcn3_fpu_build_wm_range_table(struct clk_mgr *base);
 
 #endif /* __DCN30_FPU_H__*/