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[87.205.5.123]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-b8e9fad97a7sm16715766b.0.2026.02.03.10.56.37 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 03 Feb 2026 10:56:38 -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, michel.daenzer@mailbox.org, daniel@fooishbar.org, admin@ptr1337.dev Subject: [PATCH v3 07/19] drm/amd/display: Add CH7218 PCON ID Date: Tue, 3 Feb 2026 19:56:14 +0100 Message-ID: <20260203185626.55428-8-tomasz.pakula.oficjalny@gmail.com> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20260203185626.55428-1-tomasz.pakula.oficjalny@gmail.com> References: <20260203185626.55428-1-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] Chrontel CH7218 found in Ugreen DP -> HDMI 2.1 adapter (model 85564) works perfectly with VRR after testing. VRR and FreeSync compatibility is explicitly advertised as a feature so it's addition is a formality. Support FreeSync info packet passthrough and "generic" HDMI VRR. [How] Add CH7218's ID to dm_helpers_is_vrr_pcon_allowed() Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/4773 Signed-off-by: Tomasz Paku=C5=82a --- drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c | 1 + drivers/gpu/drm/amd/display/include/ddc_service_types.h | 1 + 2 files changed, 2 insertions(+) diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c b/dr= ivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c index cb8a2855ac10..690558584a0f 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c @@ -1396,6 +1396,7 @@ bool dm_helpers_is_vrr_pcon_allowed(const struct dc_l= ink *link, const struct drm case DP_BRANCH_DEVICE_ID_0060AD: case DP_BRANCH_DEVICE_ID_00E04C: case DP_BRANCH_DEVICE_ID_90CC24: + case DP_BRANCH_DEVICE_ID_2B02F0: return true; } =20 diff --git a/drivers/gpu/drm/amd/display/include/ddc_service_types.h b/driv= ers/gpu/drm/amd/display/include/ddc_service_types.h index 1c603b12957f..e838f7c1269c 100644 --- a/drivers/gpu/drm/amd/display/include/ddc_service_types.h +++ b/drivers/gpu/drm/amd/display/include/ddc_service_types.h @@ -36,6 +36,7 @@ #define DP_BRANCH_DEVICE_ID_006037 0x006037 #define DP_BRANCH_DEVICE_ID_001CF8 0x001CF8 #define DP_BRANCH_DEVICE_ID_0060AD 0x0060AD +#define DP_BRANCH_DEVICE_ID_2B02F0 0x2B02F0 /* Chrontel CH7218 */ #define DP_BRANCH_HW_REV_10 0x10 #define DP_BRANCH_HW_REV_20 0x20 =20 --=20 2.52.0