UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity

drm/amd/display: add method to check for supported range 

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 20:59:43 -04:00 committed by Alex Deucher
parent 98e6436d3a
commit e80e944608
2 changed files with 65 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

64
drivers/gpu/drm/amd/display/modules/freesync/freesync.c
View File

@ -168,6 +168,21 @@ 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,
@ -623,12 +638,7 @@ 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 = 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);
nominal_field_rate_in_uhz = 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;
@ -878,3 +888,45 @@ void mod_freesync_get_settings(struct mod_freesync *mod_freesync,
}
}
bool mod_freesync_is_valid_range(struct mod_freesync *mod_freesync,
const struct dc_stream_state *stream,
uint32_t min_refresh_cap_in_uhz,
uint32_t max_refresh_cap_in_uhz,
uint32_t min_refresh_request_in_uhz,
uint32_t max_refresh_request_in_uhz)
{
/* Calculate nominal field rate for stream */
unsigned long long nominal_field_rate_in_uhz =
calc_nominal_field_rate(stream);
// Check nominal is within range
if (nominal_field_rate_in_uhz > max_refresh_cap_in_uhz ||
nominal_field_rate_in_uhz < min_refresh_cap_in_uhz)
return false;
// If nominal is less than max, limit the max allowed refresh rate
if (nominal_field_rate_in_uhz < max_refresh_cap_in_uhz)
max_refresh_cap_in_uhz = nominal_field_rate_in_uhz;
// Don't allow min > max
if (min_refresh_request_in_uhz > max_refresh_request_in_uhz)
return false;
// Check min is within range
if (min_refresh_request_in_uhz > max_refresh_cap_in_uhz ||
min_refresh_request_in_uhz < min_refresh_cap_in_uhz)
return false;
// Check max is within range
if (max_refresh_request_in_uhz > max_refresh_cap_in_uhz ||
max_refresh_request_in_uhz < min_refresh_cap_in_uhz)
return false;
// For variable range, check for at least 10 Hz range
if ((max_refresh_request_in_uhz != min_refresh_request_in_uhz) &&
(max_refresh_request_in_uhz - min_refresh_request_in_uhz < 10000000))
return false;
return true;
}

7
drivers/gpu/drm/amd/display/modules/inc/mod_freesync.h
View File

@ -159,4 +159,11 @@ void mod_freesync_handle_v_update(struct mod_freesync *mod_freesync,
const struct dc_stream_state *stream,
struct mod_vrr_params *in_out_vrr);
bool mod_freesync_is_valid_range(struct mod_freesync *mod_freesync,
const struct dc_stream_state *stream,
uint32_t min_refresh_cap_in_uhz,
uint32_t max_refresh_cap_in_uhz,
uint32_t min_refresh_request_in_uhz,
uint32_t max_refresh_request_in_uhz);
#endif