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[87.205.5.123]) by smtp.gmail.com with ESMTPSA id 4fb4d7f45d1cf-654535c4912sm8989806a12.30.2026.01.18.17.11.52 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 18 Jan 2026 17:11:54 -0800 (PST) From: =?UTF-8?q?Tomasz=20Paku=C5=82a?= To: alexander.deucher@amd.com, harry.wentland@amd.com, sunpeng.li@amd.com Cc: maarten.lankhorst@linux.intel.com, mripard@kernel.org, tzimmermann@suse.de, airlied@gmail.com, simona@ffwll.ch, siqueira@igalia.com, dri-devel@lists.freedesktop.org, amd-gfx@lists.freedesktop.org, linux-kernel@vger.kernel.org, tomasz.pakula.oficjalny@gmail.com, bernhard.berger@gmail.com Subject: [PATCH 04/17] drm/amd/display: Use bigger VRR range if found in AMD vsdb Date: Mon, 19 Jan 2026 02:11:33 +0100 Message-ID: <20260119011146.62302-5-tomasz.pakula.oficjalny@gmail.com> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20260119011146.62302-1-tomasz.pakula.oficjalny@gmail.com> References: <20260119011146.62302-1-tomasz.pakula.oficjalny@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable [Why] Some monitors only expose their full VRR range in AMD vsdb for some reason. [How] Compare exposed ranges and use the bigger one. This check could be merged with the previous one but it's better to keep them separate to easily convey their meaning. Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/4177 Signed-off-by: Tomasz Paku=C5=82a --- .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gp= u/drm/amd/display/amdgpu_dm/amdgpu_dm.c index 69f3dbfe4ca3..37ab89532408 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -13204,6 +13204,18 @@ static bool copy_range_to_amdgpu_connector(struct = drm_connector *conn) return is_freesync_capable(range); } =20 +/** + * Returns true if range from AMD vsdb is bigger + */ +static bool compare_ranges(struct drm_connector *conn, + struct amdgpu_hdmi_vsdb_info *vsdb) +{ + struct drm_monitor_range_info *range =3D &conn->display_info.monitor_rang= e; + + return (vsdb->max_refresh_rate_hz - vsdb->min_refresh_rate_hz) > + (range->max_vfreq - range->min_vfreq); +} + /** * amdgpu_dm_update_freesync_caps - Update Freesync capabilities * @@ -13277,6 +13289,10 @@ void amdgpu_dm_update_freesync_caps(struct drm_con= nector *connector, if (valid_vsdb_cea && is_monitor_range_invalid(connector)) monitor_range_from_vsdb(connector, &vsdb_info); =20 + /* Use bigger range if found in AMD vsdb */ + if (valid_vsdb_cea && compare_ranges(connector, &vsdb_info)) + monitor_range_from_vsdb(connector, &vsdb_info); + if (dpcd_caps.allow_invalid_MSA_timing_param) freesync_capable =3D copy_range_to_amdgpu_connector(connector); =20 --=20 2.52.0