From: Alvin Lee <alvin.l...@amd.com>
[Description]
For SubVP scaling cases, we must include the scaling
info as part of the cmd. This is required when converting
OTG line to HUBP line for the MALL_START_LINE programming.
Reviewed-by: Jun Lei <jun....@amd.com>
Acked-by: Brian Chang <brian.ch...@amd.com>
Signed-off-by: Alvin Lee <alvin.l...@amd.com>
---
.../drm/amd/display/dc/basics/conversion.c | 21 +++++++++++++++++++
.../drm/amd/display/dc/basics/conversion.h | 3 +++
drivers/gpu/drm/amd/display/dc/dc_dmub_srv.c | 11 ++++++++++
.../amd/display/dc/dcn321/dcn321_resource.c | 3 ++-
4 files changed, 37 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/display/dc/basics/conversion.c
b/drivers/gpu/drm/amd/display/dc/basics/conversion.c
index 6767fab55c26..352e9afb85c6 100644
--- a/drivers/gpu/drm/amd/display/dc/basics/conversion.c
+++ b/drivers/gpu/drm/amd/display/dc/basics/conversion.c
@@ -100,3 +100,24 @@ void convert_float_matrix(
matrix[i] = (uint16_t)reg_value;
}
}
+
+static uint32_t find_gcd(uint32_t a, uint32_t b)
+{
+ uint32_t remainder = 0;
+ while (b != 0) {
+ remainder = a % b;
+ a = b;
+ b = remainder;
+ }
+ return a;
+}
+
+void reduce_fraction(uint32_t num, uint32_t den,
+ uint32_t *out_num, uint32_t *out_den)
+{
+ uint32_t gcd = 0;
+
+ gcd = find_gcd(num, den);
+ *out_num = num / gcd;
+ *out_den = den / gcd;
+}
diff --git a/drivers/gpu/drm/amd/display/dc/basics/conversion.h
b/drivers/gpu/drm/amd/display/dc/basics/conversion.h
index ade785c4fdc7..81da4e6f7a1a 100644
--- a/drivers/gpu/drm/amd/display/dc/basics/conversion.h
+++ b/drivers/gpu/drm/amd/display/dc/basics/conversion.h
@@ -38,6 +38,9 @@ void convert_float_matrix(
struct fixed31_32 *flt,
uint32_t buffer_size);
+void reduce_fraction(uint32_t num, uint32_t den,
+ uint32_t *out_num, uint32_t *out_den);
+
static inline unsigned int log_2(unsigned int num)
{
return ilog2(num);
diff --git a/drivers/gpu/drm/amd/display/dc/dc_dmub_srv.c
b/drivers/gpu/drm/amd/display/dc/dc_dmub_srv.c
index c8059c28ac49..09b304507bad 100644
--- a/drivers/gpu/drm/amd/display/dc/dc_dmub_srv.c
+++ b/drivers/gpu/drm/amd/display/dc/dc_dmub_srv.c
@@ -29,6 +29,7 @@
#include "dm_helpers.h"
#include "dc_hw_types.h"
#include "core_types.h"
+#include "../basics/conversion.h"
#define CTX dc_dmub_srv->ctx
#define DC_LOGGER CTX->logger
@@ -600,6 +601,7 @@ static void populate_subvp_cmd_pipe_info(struct dc *dc,
&cmd->fw_assisted_mclk_switch_v2.config_data.pipe_data[cmd_pipe_index];
struct dc_crtc_timing *main_timing = &subvp_pipe->stream->timing;
struct dc_crtc_timing *phantom_timing =
&subvp_pipe->stream->mall_stream_config.paired_stream->timing;
+ uint32_t out_num, out_den;
pipe_data->mode = SUBVP;
pipe_data->pipe_config.subvp_data.pix_clk_100hz =
subvp_pipe->stream->timing.pix_clk_100hz;
@@ -613,6 +615,15 @@ static void populate_subvp_cmd_pipe_info(struct dc *dc,
pipe_data->pipe_config.subvp_data.main_pipe_index =
subvp_pipe->pipe_idx;
pipe_data->pipe_config.subvp_data.is_drr =
subvp_pipe->stream->ignore_msa_timing_param;
+ /* Calculate the scaling factor from the src and dst height.
+ * e.g. If 3840x2160 being downscaled to 1920x1080, the scaling factor
is 1/2.
+ * Reduce the fraction 1080/2160 = 1/2 for the "scaling factor"
+ */
+ reduce_fraction(subvp_pipe->stream->src.height,
subvp_pipe->stream->dst.height, &out_num, &out_den);
+ // TODO: Uncomment below lines once DMCUB include headers are promoted
+ //pipe_data->pipe_config.subvp_data.scale_factor_numerator = out_num;
+ //pipe_data->pipe_config.subvp_data.scale_factor_denominator = out_den;
+
// Prefetch lines is equal to VACTIVE + BP + VSYNC
pipe_data->pipe_config.subvp_data.prefetch_lines =
phantom_timing->v_total - phantom_timing->v_front_porch;
diff --git a/drivers/gpu/drm/amd/display/dc/dcn321/dcn321_resource.c
b/drivers/gpu/drm/amd/display/dc/dcn321/dcn321_resource.c
index e9db5f8b6fdc..b9317d31e282 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn321/dcn321_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn321/dcn321_resource.c
@@ -1664,7 +1664,8 @@ static bool dcn321_resource_construct(
dc->caps.subvp_prefetch_end_to_mall_start_us = 15;
dc->caps.subvp_swath_height_margin_lines = 16;
dc->caps.subvp_pstate_allow_width_us = 20;
-
+ dc->caps.subvp_vertical_int_margin_us = 30;
+
dc->caps.max_slave_planes = 1;
dc->caps.max_slave_yuv_planes = 1;
dc->caps.max_slave_rgb_planes = 1;
--
2.25.1
