From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tomi Valkeinen Subject: Re: [PATCH 1/4] OMAPDSS: Fix DSS clock multiplier issue on 3703 and probably 3630 Date: Fri, 9 May 2014 11:01:52 +0300 Message-ID: <536C8B70.1000306@ti.com> References: <1398815562-24113-1-git-send-email-tony@atomide.com> <1398815562-24113-2-git-send-email-tony@atomide.com> <20140508232006.GG2198@atomide.com> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="3jIX68OOgDqkWAxTqG5EtkJ1weIGNAqvK" Return-path: In-Reply-To: <20140508232006.GG2198-4v6yS6AI5VpBDgjK7y7TUQ@public.gmane.org> Sender: devicetree-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Tony Lindgren Cc: linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, linux-fbdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-omap-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: devicetree@vger.kernel.org --3jIX68OOgDqkWAxTqG5EtkJ1weIGNAqvK Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable On 09/05/14 02:20, Tony Lindgren wrote: > * Tony Lindgren [140429 16:53]: >> Otherwise we can get often errors like the following and the >> display won't come on: >> >> omapdss APPLY error: FIFO UNDERFLOW on gfx, disabling the overlay >> omapdss APPLY error: SYNC_LOST on channel lcd, restarting >> the output with video overlays disabled >> >> There are some earlier references to this issue: >> >> http://www.spinics.net/lists/linux-omap/msg59511.html >> http://www.spinics.net/lists/linux-omap/msg59724.html >> >> It seems that it's safe to set the lower values even for 3630. >> If we can confirm that 3630 works with the higher values >> reliably we can add further detection. >=20 > BTW, I'm also seeing this warning on 3730-evm it may be related: >=20 > [ 3.523101] ------------[ cut here ]------------ > [ 3.528015] WARNING: CPU: 0 PID: 6 at drivers/video/fbdev/omap2/dss/= dss.c:483 dss_set_fck_rate+0x6c/0x8c() > [ 3.538360] clk rate mismatch: 108000000 !=3D 115200000 > [ 3.543518] Modules linked in: Hmm... Can you paste the clk_summary from debugfs? Somehow the clock framework calculates the clock rate differently than the dss. Or do we have different clock.dts files used for 3730 and 3630? Tomi --3jIX68OOgDqkWAxTqG5EtkJ1weIGNAqvK Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIcBAEBAgAGBQJTbItwAAoJEPo9qoy8lh71tFcP/1p90wC6hphrF0G+gPZX/AEX An0Mzt0BXvPzVBsyy/KQxMtpr/YFRPvNiGL52zYkMsLWaSkzfExGxfj5VboCWr6D 1uspLD+dr12EUKYpk2rlGARLh2OiNvoC0p8nDmbvWCL4Eo+aWPEB24lFg6EbCChy VyMZzpaNultkwAxCH7/PJ3WIFuVGl1TptWM2a7mLIfdmeFr1nPfrz1JNrBgDlqbi 3NhuJJK2zroTM8h2U3RufLu+EwpFuVXf+N72/ZkOcqPb+YuF0+H4ahNHqDXAq6FW cA/9B6qFzKSgI5/t9peEYbSLjneKPSApnMjluUabxjmQ8RoA0DSruidODwdbBaLj AfLz4pZJky7XwawxVwCUgRouQbdjxVMnPAqOCCysiqVLCSwsbXepP3W46vXHHpKe P4BD14G0WpJETzMdtrh+8PnNCmxeV+cdvj/d1RZWz8XGEkjaw/ecsWeBKoyP80q6 9j2Vo2QeC2EP8q3QT/W9S5fQkL2/KTfpKyb3TYAZVTIiyyK2csjqCMTRs1VmMUA7 MtZp8iUXAaqPg8KADcL/ab/K4o16AXpmVsAA37Bhw05auXtMPwijb1PEKzydjheF IkD49RImPplb+yhsWD+PzdB88H99Li8dVjehseO4/qj7DUT/jm++w8L9mqDrvDN+ 8yKOaA5gWBjImaheoX2b =Oyw8 -----END PGP SIGNATURE----- --3jIX68OOgDqkWAxTqG5EtkJ1weIGNAqvK-- -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html