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Date: Fri, 17 Feb 2017 12:43:38 +0100 From: Philipp Zabel <p.zabel@...gutronix.de> To: Steve Longerbeam <slongerbeam@...il.com> Cc: Russell King - ARM Linux <linux@...linux.org.uk>, robh+dt@...nel.org, mark.rutland@....com, shawnguo@...nel.org, kernel@...gutronix.de, fabio.estevam@....com, mchehab@...nel.org, hverkuil@...all.nl, nick@...anahar.org, markus.heiser@...marIT.de, laurent.pinchart+renesas@...asonboard.com, bparrot@...com, geert@...ux-m68k.org, arnd@...db.de, sudipm.mukherjee@...il.com, minghsiu.tsai@...iatek.com, tiffany.lin@...iatek.com, jean-christophe.trotin@...com, horms+renesas@...ge.net.au, niklas.soderlund+renesas@...natech.se, robert.jarzmik@...e.fr, songjun.wu@...rochip.com, andrew-ct.chen@...iatek.com, gregkh@...uxfoundation.org, shuah@...nel.org, sakari.ailus@...ux.intel.com, pavel@....cz, devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, linux-media@...r.kernel.org, devel@...verdev.osuosl.org, Steve Longerbeam <steve_longerbeam@...tor.com> Subject: Re: [PATCH v4 00/36] i.MX Media Driver On Thu, 2017-02-16 at 14:27 -0800, Steve Longerbeam wrote: > > On 02/16/2017 02:20 PM, Russell King - ARM Linux wrote: > > On Wed, Feb 15, 2017 at 06:19:02PM -0800, Steve Longerbeam wrote: > >> In version 4: > > > > With this version, I get: > > > > [28762.892053] imx6-mipi-csi2: LP-11 timeout, phy_state = 0x00000000 > > [28762.899409] ipu1_csi0: pipeline_set_stream failed with -110 > > > > Right, in the imx219, on exit from s_power(), the clock and data lanes > must be placed in the LP-11 state. This has been done in the ov5640 and > tc358743 subdevs. > > If we want to bring in the patch that adds a .prepare_stream() op, > the csi-2 bus would need to be placed in LP-11 in that op instead. > > Philipp, should I go ahead and add your .prepare_stream() patch? I think with Russell's explanation of how the imx219 sensor operates, we'll have to do something before calling the sensor s_stream, but right now I'm still unsure what exactly. regards Philipp
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