From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sakari Ailus Subject: [PATCH v3 2/2] dt: bindings: media: Document data lane numbering without lane reordering Date: Fri, 29 Sep 2017 11:23:41 +0300 Message-ID: <1506673421-6085-3-git-send-email-sakari.ailus@linux.intel.com> References: <1506673421-6085-1-git-send-email-sakari.ailus@linux.intel.com> Return-path: In-Reply-To: <1506673421-6085-1-git-send-email-sakari.ailus@linux.intel.com> Sender: linux-media-owner@vger.kernel.org To: linux-media@vger.kernel.org Cc: devicetree@vger.kernel.org, robh@kernel.org List-Id: devicetree@vger.kernel.org Most devices do not support lane reordering and in many cases the documentation of the data-lanes property is incomplete for such devices. Document that in case the lane reordering isn't supported, monotonically incremented values from 0 or 1 shall be used. Signed-off-by: Sakari Ailus Acked-by: Rob Herring --- Documentation/devicetree/bindings/media/video-interfaces.txt | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/Documentation/devicetree/bindings/media/video-interfaces.txt b/Documentation/devicetree/bindings/media/video-interfaces.txt index bc8f18fb..bd64749 100644 --- a/Documentation/devicetree/bindings/media/video-interfaces.txt +++ b/Documentation/devicetree/bindings/media/video-interfaces.txt @@ -108,7 +108,10 @@ Optional endpoint properties determines the logical lane number, while the value of an entry indicates physical lane, e.g. for 2-lane MIPI CSI-2 bus we could have "data-lanes = <1 2>;", assuming the clock lane is on hardware lane 0. - This property is valid for serial busses only (e.g. MIPI CSI-2). + If the hardware does not support lane reordering, monotonically + incremented values shall be used from 0 or 1 onwards, depending on + whether or not there is also a clock lane. This property is valid for + serial busses only (e.g. MIPI CSI-2). - clock-lanes: an array of physical clock lane indexes. Position of an entry determines the logical lane number, while the value of an entry indicates physical lane, e.g. for a MIPI CSI-2 bus we could have "clock-lanes = <0>;", -- 2.7.4