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AJvYcCUb9BClPZNaYuBQEudALCmMgPjdIQvOEVSJkd3toBb8FFdR8mOWxvf63SR18WFMMF0mI8aC/TJevbgtxH4=@vger.kernel.org X-Gm-Message-State: AOJu0YxAWUzJVzjHL2aESWsanlsgviaVkBasZzXnNBkXCblHCKxTkhq9 1bbPUJ3LIqJ82iFmGLtGCsKAYfiMnGSGNN0LLXHcTfomVR/AA18u115WuQrzsLh9osAzZwf6pQZ yuSXqC1Dy1n68xhrC7Q== X-Google-Smtp-Source: AGHT+IH212lvH0OHNPJNv1bQUQ4aeCTg2p1y3CUNhOC0p0OsS48AF7asSzpbt6NelhuK+Z+ZRnf01Xb/Ifgp0iE= X-Received: from pfbfi13.prod.google.com ([2002:a05:6a00:398d:b0:76b:f255:8cec]) (user=rdbabiera job=prod-delivery.src-stubby-dispatcher) by 2002:a05:6a00:c93:b0:76b:fb4a:118c with SMTP id d2e1a72fcca58-7702fab0136mr913731b3a.18.1755808738179; Thu, 21 Aug 2025 13:38:58 -0700 (PDT) Date: Thu, 21 Aug 2025 20:38:35 +0000 In-Reply-To: <20250821203838.1721581-4-rdbabiera@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20250821203838.1721581-4-rdbabiera@google.com> X-Developer-Key: i=rdbabiera@google.com; a=openpgp; fpr=639A331F1A21D691815CE090416E17CA2BBBD5C8 X-Developer-Signature: v=1; a=openpgp-sha256; l=988; i=rdbabiera@google.com; h=from:subject; bh=iGMZdthX6JfAcVlNIkwSwqhVaKX3KtMGz9p+32qn1j4=; b=kA0DAAoWeI6i8iBiMbYByyZiAGing8+jv02Le96c1nFMJwT6pZfHwIpEwRQSWc0YohrAWxGwL Yh1BAAWCgAdFiEELU9uMNjUZbScCXwzeI6i8iBiMbYFAming88ACgkQeI6i8iBiMbZNDAD+IfQM U7kfmrnn2eZBdCs6AA7dmu5xlmyq3zMnSuLhAewBAIR1xIgfP7yFlng9itvtofskLU9ZGJUlaa4 oKqTTW1ML X-Mailer: git-send-email 2.51.0.261.g7ce5a0a67e-goog Message-ID: <20250821203838.1721581-6-rdbabiera@google.com> Subject: [PATCH v1 2/2] usb: typec: altmodes/displayport: do not enter mode if port is the UFP From: RD Babiera Cc: heikki.krogerus@linux.intel.com, gregkh@linuxfoundation.org, badhri@google.com, linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, RD Babiera Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Nothing currently stops the DisplayPort Alt Mode driver from sending Enter Mode if the port is the Data Device. Utilize typec_altmode_get_data_role to prevent mode entry. Signed-off-by: RD Babiera --- drivers/usb/typec/altmodes/displayport.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/usb/typec/altmodes/displayport.c b/drivers/usb/typec/a= ltmodes/displayport.c index 1dcb77faf85d..8d111ad3b71b 100644 --- a/drivers/usb/typec/altmodes/displayport.c +++ b/drivers/usb/typec/altmodes/displayport.c @@ -758,7 +758,9 @@ int dp_altmode_probe(struct typec_altmode *alt) struct fwnode_handle *fwnode; struct dp_altmode *dp; =20 - /* FIXME: Port can only be DFP_U. */ + /* Port can only be DFP_U. */ + if (typec_altmode_get_data_role(alt) !=3D TYPEC_HOST) + return -EPROTO; =20 /* Make sure we have compatible pin configurations */ if (!(DP_CAP_PIN_ASSIGN_DFP_D(port->vdo) & --=20 2.51.0.261.g7ce5a0a67e-goog