From: Alvin Lee <Alvin.Lee2@amd.com>
Date: Wed, 14 Dec 2022 10:12:55 -0500
Subject: [PATCH] drm/amd/display: Allow subvp on vactive pipes that are
 2560x1440@60
References: bsc#1012628
Patch-mainline: 6.2.7
Git-commit: 2ebd1036209c2e7b61e6bc6e5bee4b67c1684ac6

commit 2ebd1036209c2e7b61e6bc6e5bee4b67c1684ac6 upstream.

Enable subvp on specifically 1440p@60hz displays even though it can
switch in vactive.

Tested-by: Daniel Wheeler <Daniel.Wheeler@amd.com>
Reviewed-by: Jun Lei <Jun.Lei@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Alvin Lee <Alvin.Lee2@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 .../drm/amd/display/dc/dcn32/dcn32_resource.h |  2 ++
 .../drm/amd/display/dc/dml/dcn32/dcn32_fpu.c  | 31 ++++++++++++++++++-
 2 files changed, 32 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_resource.h b/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_resource.h
index 13fbc574..7ed53ccf 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_resource.h
+++ b/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_resource.h
@@ -134,6 +134,8 @@ 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/drivers/gpu/drm/amd/display/dc/dml/dcn32/dcn32_fpu.c b/drivers/gpu/drm/amd/display/dc/dml/dcn32/dcn32_fpu.c
index 69e205ac..496851ca 100644
--- a/drivers/gpu/drm/amd/display/dc/dml/dcn32/dcn32_fpu.c
+++ b/drivers/gpu/drm/amd/display/dc/dml/dcn32/dcn32_fpu.c
@@ -693,7 +693,9 @@ 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;
@@ -2630,3 +2632,30 @@ 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;
+}
-- 
2.35.3