drm/amd/display: Allow subvp on vactive pipes that are 2560x1440@60

From Alvin Lee
02c8fa11f545938f3f5af3cd02fe343803539213 in linux-6.1.y/6.1.20
2ebd1036209c2e7b61e6bc6e5bee4b67c1684ac6 in mainline linux

diff --git a/sys/dev/pci/drm/amd/display/dc/dcn32/dcn32_resource.h b/sys/dev/pci/drm/amd/display/dc/dcn32/dcn32_resource.h
index f76120e..cf7633f 100644 (file)
--- a/sys/dev/pci/drm/amd/display/dc/dcn32/dcn32_resource.h
+++ b/sys/dev/pci/drm/amd/display/dc/dcn32/dcn32_resource.h
@@ -142,6 +142,8 @@ void dcn32_restore_mall_state(struct dc *dc,
                struct dc_state *context,
                struct mall_temp_config *temp_config);
 
+bool dcn32_allow_subvp_with_active_margin(struct pipe_ctx *pipe);
+
 /* definitions for run time init of reg offsets */
 
 /* CLK SRC */

diff --git a/sys/dev/pci/drm/amd/display/dc/dml/dcn32/dcn32_fpu.c b/sys/dev/pci/drm/amd/display/dc/dml/dcn32/dcn32_fpu.c
index 04cc96e..91a3839 100644 (file)
--- a/sys/dev/pci/drm/amd/display/dc/dml/dcn32/dcn32_fpu.c
+++ b/sys/dev/pci/drm/amd/display/dc/dml/dcn32/dcn32_fpu.c
@@ -676,7 +676,9 @@ static bool dcn32_assign_subvp_pipe(struct dc *dc,
                 */
                if (pipe->plane_state && !pipe->top_pipe &&
                                pipe->stream->mall_stream_config.type == SUBVP_NONE && refresh_rate < 120 && !pipe->plane_state->address.tmz_surface &&
-                               vba->ActiveDRAMClockChangeLatencyMarginPerState[vba->VoltageLevel][vba->maxMpcComb][vba->pipe_plane[pipe_idx]] <= 0) {
+                               (vba->ActiveDRAMClockChangeLatencyMarginPerState[vba->VoltageLevel][vba->maxMpcComb][vba->pipe_plane[pipe_idx]] <= 0 ||
+                               (vba->ActiveDRAMClockChangeLatencyMarginPerState[vba->VoltageLevel][vba->maxMpcComb][vba->pipe_plane[pipe_idx]] > 0 &&
+                                               dcn32_allow_subvp_with_active_margin(pipe)))) {
                        while (pipe) {
                                num_pipes++;
                                pipe = pipe->bottom_pipe;
@@ -2558,3 +2560,30 @@ void dcn32_zero_pipe_dcc_fraction(display_e2e_pipe_params_st *pipes,
        pipes[pipe_cnt].pipe.src.dcc_fraction_of_zs_req_luma = 0;
        pipes[pipe_cnt].pipe.src.dcc_fraction_of_zs_req_chroma = 0;
 }
+
+bool dcn32_allow_subvp_with_active_margin(struct pipe_ctx *pipe)
+{
+       bool allow = false;
+       uint32_t refresh_rate = 0;
+
+       /* Allow subvp on displays that have active margin for 2560x1440@60hz displays
+        * only for now. There must be no scaling as well.
+        *
+        * For now we only enable on 2560x1440@60hz displays to enable 4K60 + 1440p60 configs
+        * for p-state switching.
+        */
+       if (pipe->stream && pipe->plane_state) {
+               refresh_rate = (pipe->stream->timing.pix_clk_100hz * 100 +
+                                               pipe->stream->timing.v_total * pipe->stream->timing.h_total - 1)
+                                               / (double)(pipe->stream->timing.v_total * pipe->stream->timing.h_total);
+               if (pipe->stream->timing.v_addressable == 1440 &&
+                               pipe->stream->timing.h_addressable == 2560 &&
+                               refresh_rate >= 55 && refresh_rate <= 65 &&
+                               pipe->plane_state->src_rect.height == 1440 &&
+                               pipe->plane_state->src_rect.width == 2560 &&
+                               pipe->plane_state->dst_rect.height == 1440 &&
+                               pipe->plane_state->dst_rect.width == 2560)
+                       allow = true;
+       }
+       return allow;
+}