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drm/amd/display: Fix bug where refresh rate becomes fixed

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This issue occurs if refresh rate range is very small and lfc is not used.
When frame spikes occur, refresh rate becomes fixed and will not restore properly

Signed-off-by: Anthony Koo <Anthony.Koo@amd.com>
Reviewed-by: Aric Cyr <Aric.Cyr@amd.com>
Acked-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Anthony Koo 2018-04-04 21:01:21 -04:00 committed by Alex Deucher
parent e80e944608
commit ff6014d63a
2 changed files with 26 additions and 20 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

43
drivers/gpu/drm/amd/display/modules/freesync/freesync.c
View File

@ -168,21 +168,6 @@ static unsigned int calc_v_total_from_duration(
return v_total;
}
static unsigned long long calc_nominal_field_rate(const struct dc_stream_state *stream)
{
unsigned long long nominal_field_rate_in_uhz = 0;
/* Calculate nominal field rate for stream */
nominal_field_rate_in_uhz = stream->timing.pix_clk_khz;
nominal_field_rate_in_uhz *= 1000ULL * 1000ULL * 1000ULL;
nominal_field_rate_in_uhz = div_u64(nominal_field_rate_in_uhz,
stream->timing.h_total);
nominal_field_rate_in_uhz = div_u64(nominal_field_rate_in_uhz,
stream->timing.v_total);
return nominal_field_rate_in_uhz;
}
static void update_v_total_for_static_ramp(
struct core_freesync *core_freesync,
const struct dc_stream_state *stream,
@ -441,10 +426,11 @@ static void apply_fixed_refresh(struct core_freesync *core_freesync,
in_out_vrr->adjust.v_total_min;
} else {
in_out_vrr->adjust.v_total_min =
calc_v_total_from_refresh(
stream, in_out_vrr->max_refresh_in_uhz);
calc_v_total_from_refresh(stream,
in_out_vrr->max_refresh_in_uhz);
in_out_vrr->adjust.v_total_max =
in_out_vrr->adjust.v_total_min;
calc_v_total_from_refresh(stream,
in_out_vrr->min_refresh_in_uhz);
}
}
}
@ -638,7 +624,8 @@ void mod_freesync_build_vrr_params(struct mod_freesync *mod_freesync,
core_freesync = MOD_FREESYNC_TO_CORE(mod_freesync);
/* Calculate nominal field rate for stream */
nominal_field_rate_in_uhz = calc_nominal_field_rate(stream);
nominal_field_rate_in_uhz =
mod_freesync_calc_nominal_field_rate(stream);
min_refresh_in_uhz = in_config->min_refresh_in_uhz;
max_refresh_in_uhz = in_config->max_refresh_in_uhz;
@ -888,6 +875,22 @@ void mod_freesync_get_settings(struct mod_freesync *mod_freesync,
}
}
unsigned long long mod_freesync_calc_nominal_field_rate(
const struct dc_stream_state *stream)
{
unsigned long long nominal_field_rate_in_uhz = 0;
/* Calculate nominal field rate for stream */
nominal_field_rate_in_uhz = stream->timing.pix_clk_khz;
nominal_field_rate_in_uhz *= 1000ULL * 1000ULL * 1000ULL;
nominal_field_rate_in_uhz = div_u64(nominal_field_rate_in_uhz,
stream->timing.h_total);
nominal_field_rate_in_uhz = div_u64(nominal_field_rate_in_uhz,
stream->timing.v_total);
return nominal_field_rate_in_uhz;
}
bool mod_freesync_is_valid_range(struct mod_freesync *mod_freesync,
const struct dc_stream_state *stream,
uint32_t min_refresh_cap_in_uhz,
@ -897,7 +900,7 @@ bool mod_freesync_is_valid_range(struct mod_freesync *mod_freesync,
{
/* Calculate nominal field rate for stream */
unsigned long long nominal_field_rate_in_uhz =
calc_nominal_field_rate(stream);
mod_freesync_calc_nominal_field_rate(stream);
// Check nominal is within range
if (nominal_field_rate_in_uhz > max_refresh_cap_in_uhz ||

3
drivers/gpu/drm/amd/display/modules/inc/mod_freesync.h
View File

@ -159,6 +159,9 @@ void mod_freesync_handle_v_update(struct mod_freesync *mod_freesync,
const struct dc_stream_state *stream,
struct mod_vrr_params *in_out_vrr);
unsigned long long mod_freesync_calc_nominal_field_rate(
const struct dc_stream_state *stream);
bool mod_freesync_is_valid_range(struct mod_freesync *mod_freesync,
const struct dc_stream_state *stream,
uint32_t min_refresh_cap_in_uhz,