Commit e80e9446 authored by Anthony Koo's avatar Anthony Koo Committed by Alex Deucher
Browse files

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



Signed-off-by: default avatarAnthony Koo <Anthony.Koo@amd.com>
Reviewed-by: default avatarAric Cyr <Aric.Cyr@amd.com>
Acked-by: default avatarHarry Wentland <harry.wentland@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 98e6436d

drivers/gpu/drm/amd/display/modules/freesync/freesync.c

+58 −6
Original line number Diff line number Diff line
@@ -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;

}

drivers/gpu/drm/amd/display/modules/inc/mod_freesync.h

+7 −0
Original line number Diff line number Diff line
@@ -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