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From 2b6c6d1279abee4ec2d432168fdd1142b2469879 Mon Sep 17 00:00:00 2001
From: Anthony Koo <Anthony.Koo@amd.com>
Date: Wed, 4 Apr 2018 20:59:43 -0400
Subject: [PATCH 0112/2940] 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>
---
.../amd/display/modules/freesync/freesync.c | 64 +++++++++++++++++--
.../amd/display/modules/inc/mod_freesync.h | 7 ++
2 files changed, 65 insertions(+), 6 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/modules/freesync/freesync.c b/drivers/gpu/drm/amd/display/modules/freesync/freesync.c
index 5e12e463c06a..4af73a72b9a9 100644
--- a/drivers/gpu/drm/amd/display/modules/freesync/freesync.c
+++ b/drivers/gpu/drm/amd/display/modules/freesync/freesync.c
@@ -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;
+}
+
diff --git a/drivers/gpu/drm/amd/display/modules/inc/mod_freesync.h b/drivers/gpu/drm/amd/display/modules/inc/mod_freesync.h
index bd75ca5f1cd3..e7d77bb6209f 100644
--- a/drivers/gpu/drm/amd/display/modules/inc/mod_freesync.h
+++ b/drivers/gpu/drm/amd/display/modules/inc/mod_freesync.h
@@ -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
--
2.17.1
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