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Thu, 04 Jul 2024 18:25:18 +0200 Message-ID: <4d48bbdb-91fb-46f2-b101-112f45c81cdd@gmx.net> Date: Thu, 4 Jul 2024 18:25:16 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 07/11] drm/vc4: hdmi: Disable connector status polling during suspend To: Peter Robinson Cc: Greg Kroah-Hartman , Florian Fainelli , Ray Jui , Scott Branden , Maxime Ripard , Thomas Gleixner , Jassi Brar , Ulf Hansson , Jiri Slaby , Minas Harutyunyan , Dave Stevenson , Maarten Lankhorst , Thomas Zimmermann , David Airlie , Daniel Vetter , Lukas Wunner , dri-devel@lists.freedesktop.org, bcm-kernel-feedback-list@broadcom.com, linux-pm@vger.kernel.org, linux-serial@vger.kernel.org, linux-usb@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kernel-list@raspberrypi.com References: <20240630153652.318882-1-wahrenst@gmx.net> <20240630153652.318882-8-wahrenst@gmx.net> Content-Language: en-US From: Stefan Wahren In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: quoted-printable X-Provags-ID: V03:K1:e9DVrq5jG1tQYjou4M48Ieq6c+HG2N8PKRsDwhcsvlXjmcfHMEm 5YgHnadFU/xlL1Bysj7N+xe+d1+LrvYXLxNNbLe5ueCdX+uJpIcbDAySg9Yu3QvHoJT03rH /CKZ/eYfoLstRyaKhkrZvKrTJg4H0jTt1qc2XHg19ULmAbwSIYIeo8cQ5K6/epGLpRxhg77 hkFTF9VEg3w9zHkcBLceQ== UI-OutboundReport: notjunk:1;M01:P0:4z4MiHBYFqM=;VeOJKcvLWARNmwRjqx6xlU/V35H 0amzJL09fb4TJD7p7usMBUW+PvbKHHHhBbtI/DMStmffuefLsHdbm4jSOFWBYN6Wn0LC8dNle qjJbeyh07dW1yy9uVlT9mDTerf+E5spIO8D/izpdvQdg7ZMbof9K0ION5QKNvsmeDw0kAA/Kf DYQIleNZkNY5c+3d3OmBQ81W6jX6MrnrLq+CyhY257AHvfiYQUSN8czl7y8q9RKXj0NVJuX3Q IWn0C80/cIcVQOM6yAVVfB+eRkIQzX/UcXqh6N+RIzbRZec0khkwKaMRfIIigwilECO3GXjbG Nlvs7g+s6bxzE9xilKE8zwyix1hsMvISlFQIRWHPT4EQ4u9WkyUSMR24BFqveNsojtIs8kQGp cekVd855UyIJSNmOSpBLd4wDLamAynH4pj++60eBFYsgiWuxlwdSC8Pf33NSJIueYjSEwK99M 2bPs6higbl8WeU/BGtXt8clemiaycV5XMvsRT8ulSk8MLKJwejaml0GZpTIyfg50kBm7AKRDn prMsxN98XsAx45PJ5rRx5KzVQf+9WmtLXnc4UiHTMk+HqhSnZF1jgjpQFMCgAMtaAiKpt4IAj 8uLYGD4QBNYhLXuddgt++vN6gOZZbI2eWw3JnIrLIZeIOghlGf/bG5GpHLX6LMoHHl+QxKVZf g9Os0+BbQunqBg8OwG5IpgGTlyorBhhO4ojgRgNL+cmV22XKQ2DzyvNEQ/KR/SmeCqEpZnAgZ pGlC9+OCCiuCicv+uXYBC8EiajhIGJ50VWGCat+Nztab3t8aa1nsHoMh/eV37t80GxNPVQQ+0 2YtM56sbhygAeFhWHO2AOD9OgvfG5ZnpWi1CiwzrV49QI= X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240704_092534_463470_EB8325E0 X-CRM114-Status: GOOD ( 11.95 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi Peter, Am 02.07.24 um 22:02 schrieb Peter Robinson: > Hi Stefan, > >> Suspend of VC4 HDMI will likely triggers a warning from >> vc4_hdmi_connector_detect_ctx() during poll of connector status. >> The power management will prevent the resume and keep the relevant >> power domain disabled. >> >> Since there is no reason to poll the connector status during >> suspend, the polling should be disabled during this. > What about HDMI-CEC? I don't know well enough how CEC integrates at > this level but CEC can wake up the device over HDMI from a TV display > for example so if this affects that, while it's maybe not required for > first pass, I know the rpi is used in a lot of media use cases so the > ability to wake up via CEC would certainly be welcomed. unfortunately i don't know much about HDMI-CEC, too. The only thing I noticed was that I currently cannot configure vc4 as a wakeup source.