drm/amd/display: Use 100 Hz precision for pipe pixel clocks

[Why]
Users would like more accurate pixel clocks, especially for fractional
"TV" frame rates like 59.94 Hz.

[How]
Store and communicate pixel clocks with 100 Hz accuracy from
dc_crtc_timing through to BIOS command table setpixelclock call.

Signed-off-by: Ken Chalmers <ken.chalmers@amd.com>
Reviewed-by: Charlene Liu <Charlene.Liu@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

2 files changed, 10 insertions, 10 deletions

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 9ebe30ba4dab..f3aa7b53d2aa 100644
--- a/drivers/gpu/drm/amd/display/dc/calcs/dce_calcs.c
+++ b/drivers/gpu/drm/amd/display/dc/calcs/dce_calcs.c
@@ -2792,7 +2792,7 @@ static void populate_initial_data(
 		data->lpt_en[num_displays + 4] = false;
 		data->h_total[num_displays + 4] = bw_int_to_fixed(pipe[i].stream->timing.h_total);
 		data->v_total[num_displays + 4] = bw_int_to_fixed(pipe[i].stream->timing.v_total);
-		data->pixel_rate[num_displays + 4] = bw_frc_to_fixed(pipe[i].stream->timing.pix_clk_khz, 1000);
+		data->pixel_rate[num_displays + 4] = bw_frc_to_fixed(pipe[i].stream->timing.pix_clk_100hz, 10000);
 		data->src_width[num_displays + 4] = bw_int_to_fixed(pipe[i].plane_res.scl_data.viewport.width);
 		data->pitch_in_pixels[num_displays + 4] = data->src_width[num_displays + 4];
 		data->src_height[num_displays + 4] = bw_int_to_fixed(pipe[i].plane_res.scl_data.viewport.height);
@@ -2881,7 +2881,7 @@ static void populate_initial_data(
 
 	/* Pipes without underlay after */
 	for (i = 0; i < pipe_count; i++) {
-		unsigned int pixel_clock_khz;
+		unsigned int pixel_clock_100hz;
 		if (!pipe[i].stream || pipe[i].bottom_pipe)
 			continue;
 
@@ -2890,10 +2890,10 @@ static void populate_initial_data(
 		data->lpt_en[num_displays + 4] = false;
 		data->h_total[num_displays + 4] = bw_int_to_fixed(pipe[i].stream->timing.h_total);
 		data->v_total[num_displays + 4] = bw_int_to_fixed(pipe[i].stream->timing.v_total);
-		pixel_clock_khz = pipe[i].stream->timing.pix_clk_khz;
+		pixel_clock_100hz = pipe[i].stream->timing.pix_clk_100hz;
 		if (pipe[i].stream->timing.timing_3d_format == TIMING_3D_FORMAT_HW_FRAME_PACKING)
-			pixel_clock_khz *= 2;
-		data->pixel_rate[num_displays + 4] = bw_frc_to_fixed(pixel_clock_khz, 1000);
+			pixel_clock_100hz *= 2;
+		data->pixel_rate[num_displays + 4] = bw_frc_to_fixed(pixel_clock_100hz, 10000);
 		if (pipe[i].plane_state) {
 			data->src_width[num_displays + 4] = bw_int_to_fixed(pipe[i].plane_res.scl_data.viewport.width);
 			data->pitch_in_pixels[num_displays + 4] = data->src_width[num_displays + 4];
diff --git a/drivers/gpu/drm/amd/display/dc/calcs/dcn_calcs.c b/drivers/gpu/drm/amd/display/dc/calcs/dcn_calcs.c
index 446ee482fd24..12d1842079ae 100644
--- a/drivers/gpu/drm/amd/display/dc/calcs/dcn_calcs.c
+++ b/drivers/gpu/drm/amd/display/dc/calcs/dcn_calcs.c
@@ -416,7 +416,7 @@ static void pipe_ctx_to_e2e_pipe_params (
 			- pipe->stream->timing.v_addressable
 			- pipe->stream->timing.v_border_bottom
 			- pipe->stream->timing.v_border_top;
-	input->dest.pixel_rate_mhz = pipe->stream->timing.pix_clk_khz/1000.0;
+	input->dest.pixel_rate_mhz = pipe->stream->timing.pix_clk_100hz/10000.0;
 	input->dest.vstartup_start = pipe->pipe_dlg_param.vstartup_start;
 	input->dest.vupdate_offset = pipe->pipe_dlg_param.vupdate_offset;
 	input->dest.vupdate_offset = pipe->pipe_dlg_param.vupdate_offset;
@@ -663,9 +663,9 @@ static void hack_disable_optional_pipe_split(struct dcn_bw_internal_vars *v)
 }
 
 static void hack_force_pipe_split(struct dcn_bw_internal_vars *v,
-		unsigned int pixel_rate_khz)
+		unsigned int pixel_rate_100hz)
 {
-	float pixel_rate_mhz = pixel_rate_khz / 1000;
+	float pixel_rate_mhz = pixel_rate_100hz / 10000;
 
 	/*
 	 * force enabling pipe split by lower dpp clock for DPM0 to just
@@ -688,7 +688,7 @@ static void hack_bounding_box(struct dcn_bw_internal_vars *v,
 
 	if (context->stream_count == 1 &&
 			dbg->force_single_disp_pipe_split)
-		hack_force_pipe_split(v, context->streams[0]->timing.pix_clk_khz);
+		hack_force_pipe_split(v, context->streams[0]->timing.pix_clk_100hz);
 }
 
 bool dcn_validate_bandwidth(
@@ -845,7 +845,7 @@ bool dcn_validate_bandwidth(
 		v->v_sync_plus_back_porch[input_idx] = pipe->stream->timing.v_total
 				- v->vactive[input_idx]
 				- pipe->stream->timing.v_front_porch;
-		v->pixel_clock[input_idx] = pipe->stream->timing.pix_clk_khz/1000.0;
+		v->pixel_clock[input_idx] = pipe->stream->timing.pix_clk_100hz/10000.0;
 		if (pipe->stream->timing.timing_3d_format == TIMING_3D_FORMAT_HW_FRAME_PACKING)
 			v->pixel_clock[input_idx] *= 2;
 		if (!pipe->plane_state) {