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authorReza Amini <reza.amini@amd.com>2023-07-14 17:43:05 +0300
committerAlex Deucher <alexander.deucher@amd.com>2023-09-01 00:56:30 +0300
commit8f31c7be3e89634767686ffab869cd3ebfea188f (patch)
tree844d6376b8e51b1d1fdf90ec233c52f75d9cbe46
parentbab9bec6b6fb6d24f6c9205628cd9c46d768e5c1 (diff)
downloadlinux-8f31c7be3e89634767686ffab869cd3ebfea188f.tar.xz
drm/amd/display: Correct unit conversion for vstartup
[why] vstartup is calculated to be a large number. it works because it is within vertical blank, but it reduces region of blank that can be used for power gating. [how] Calculation needs to convert micro seconds to number of vertical lines. Reviewed-by: Kazlauskas Nicholas <Nicholas.Kazlauskas@amd.com> Acked-by: Wayne Lin <wayne.lin@amd.com> Signed-off-by: Reza Amini <reza.amini@amd.com> Tested-by: Daniel Wheeler <daniel.wheeler@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
-rw-r--r--drivers/gpu/drm/amd/display/dc/dml/dcn314/dcn314_fpu.c25
1 files changed, 24 insertions, 1 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/dml/dcn314/dcn314_fpu.c b/drivers/gpu/drm/amd/display/dc/dml/dcn314/dcn314_fpu.c
index ed8ddb75b333..07adb614366e 100644
--- a/drivers/gpu/drm/amd/display/dc/dml/dcn314/dcn314_fpu.c
+++ b/drivers/gpu/drm/amd/display/dc/dml/dcn314/dcn314_fpu.c
@@ -31,6 +31,7 @@
#include "dml/dcn20/dcn20_fpu.h"
#include "dml/dcn31/dcn31_fpu.h"
#include "dml/display_mode_vba.h"
+#include "dml/dml_inline_defs.h"
struct _vcs_dpi_ip_params_st dcn3_14_ip = {
.VBlankNomDefaultUS = 668,
@@ -273,6 +274,25 @@ static bool is_dual_plane(enum surface_pixel_format format)
return format >= SURFACE_PIXEL_FORMAT_VIDEO_BEGIN || format == SURFACE_PIXEL_FORMAT_GRPH_RGBE_ALPHA;
}
+/*
+ * micro_sec_to_vert_lines () - converts time to number of vertical lines for a given timing
+ *
+ * @param: num_us: number of microseconds
+ * @return: number of vertical lines. If exact number of vertical lines is not found then
+ * it will round up to next number of lines to guarantee num_us
+ */
+static unsigned int micro_sec_to_vert_lines(unsigned int num_us, struct dc_crtc_timing *timing)
+{
+ unsigned int num_lines = 0;
+ unsigned int lines_time_in_ns = 1000.0 *
+ (((float)timing->h_total * 1000.0) /
+ ((float)timing->pix_clk_100hz / 10.0));
+
+ num_lines = dml_ceil(1000.0 * num_us / lines_time_in_ns, 1.0);
+
+ return num_lines;
+}
+
int dcn314_populate_dml_pipes_from_context_fpu(struct dc *dc, struct dc_state *context,
display_e2e_pipe_params_st *pipes,
bool fast_validate)
@@ -289,19 +309,22 @@ int dcn314_populate_dml_pipes_from_context_fpu(struct dc *dc, struct dc_state *c
for (i = 0, pipe_cnt = 0; i < dc->res_pool->pipe_count; i++) {
struct dc_crtc_timing *timing;
+ unsigned int num_lines = 0;
if (!res_ctx->pipe_ctx[i].stream)
continue;
pipe = &res_ctx->pipe_ctx[i];
timing = &pipe->stream->timing;
+ num_lines = micro_sec_to_vert_lines(dcn3_14_ip.VBlankNomDefaultUS, timing);
+
if (pipe->stream->adjust.v_total_min != 0)
pipes[pipe_cnt].pipe.dest.vtotal = pipe->stream->adjust.v_total_min;
else
pipes[pipe_cnt].pipe.dest.vtotal = timing->v_total;
pipes[pipe_cnt].pipe.dest.vblank_nom = timing->v_total - pipes[pipe_cnt].pipe.dest.vactive;
- pipes[pipe_cnt].pipe.dest.vblank_nom = min(pipes[pipe_cnt].pipe.dest.vblank_nom, dcn3_14_ip.VBlankNomDefaultUS);
+ pipes[pipe_cnt].pipe.dest.vblank_nom = min(pipes[pipe_cnt].pipe.dest.vblank_nom, num_lines);
pipes[pipe_cnt].pipe.dest.vblank_nom = max(pipes[pipe_cnt].pipe.dest.vblank_nom, timing->v_sync_width);
pipes[pipe_cnt].pipe.dest.vblank_nom = min(pipes[pipe_cnt].pipe.dest.vblank_nom, max_allowed_vblank_nom);