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[83.28.41.208]) by smtp.gmail.com with ESMTPSA id 2adb3069b0e04-55cef43e52dsm1601758e87.152.2025.08.18.01.37.40 (version=TLS1_2 cipher=AES128-SHA bits=128/128); Mon, 18 Aug 2025 01:37:41 -0700 (PDT) Date: Mon, 18 Aug 2025 10:37:37 +0200 From: =?UTF-8?B?TWljaGHFgg==?= Pecio To: Sakari Ailus Cc: Mathias Nyman , linux-usb@vger.kernel.org, linux-media@vger.kernel.org, gregkh@linuxfoundation.org, laurent.pinchart@ideasonboard.com, hdegoede@redhat.com, Thinh.Nguyen@synopsys.com, Amardeep Rai , Kannappan R , Alan Stern Subject: Re: [PATCH v4 3/4] USB: Add a function to obtain USB version independent maximum bpi value Message-ID: <20250818103737.487e4093@foxbook> In-Reply-To: <767ac1c3-f09c-47cf-947d-968ae574e577@linux.intel.com> References: <20250812132445.3185026-1-sakari.ailus@linux.intel.com> <20250812132445.3185026-4-sakari.ailus@linux.intel.com> <20250813164958.6c6c34a4@foxbook> <767ac1c3-f09c-47cf-947d-968ae574e577@linux.intel.com> Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit On Mon, 18 Aug 2025 10:32:48 +0300, Mathias Nyman wrote: > I think the "ESIT" acronym (Endpoint Service Interval Time) is very xHCI spec > specific. Usb spec usually refers to isoc and interrupt endpoints as "periodic" > > how about one of these: > usb_endpoint_max_periodic_bytes() > usb_endpoint_max_periodic_payload() > usb_endpoint_max_periodic_bpi() I was thinking just drop "isoch" and leave usb_endpoint_max_bpi(), because USB specs call this "bytes per interval". But Alan didn't like this 3LA so we can get creative. More ideas: usb_endpoint_interval_payload() usb_endpoint_interval_bytes() Naming things and off-by-one errors...