From mboxrd@z Thu Jan 1 00:00:00 1970 From: Paul Kocialkowski Subject: Tegra DRM driver is not probing with 4.12 on tegra124 Date: Thu, 06 Jul 2017 19:15:45 +0300 Message-ID: <1499357745.1309.0.camel@paulk.fr> Mime-Version: 1.0 Content-Type: multipart/signed; micalg="pgp-sha256"; protocol="application/pgp-signature"; boundary="=-ycJkbB2O8qsm+33v1pn5" Return-path: Sender: linux-tegra-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: linux-tegra-u79uwXL29TY76Z2rM5mHXA@public.gmane.org Cc: Stephen Warren , Mikko Perttunen , Thierry Reding List-Id: linux-tegra@vger.kernel.org --=-ycJkbB2O8qsm+33v1pn5 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable As I was investigating why my nyan_big's screen was staying dark when testi= ng 4.12, it appeared that the tegra drm driver does not get probed at all on m= y setup (read: host1x_drm_probe never gets called). I have also tested on jet= son- tk1, with the same result. I am using a finely-tuned out-of-tree config[0], but it appears (from looki= ng at the lack of drm line in the logs) that the same is happening with the tegra= and multi_v7 defconfigs hooked to kernelci. First, I am wondering whether the tegra drm driver is probing for anyone following this list on any tegra124 device with 4.12. If so, feel free to r= aise your voice so we can find out what is wrong with my setup. I initially thought that it was caused by missing firmwares (that are now n= eeded for falcon/vic support), but disabling that (by removing the &tegra_vic_dri= ver entry and associated compatible string in drm.c) does not help. Hopefully, I will have time to run a bisect this week-end and identify the commit that introduced the regression. It would be quite important to get t= his fixed for the 4.13 release. In the meantime, test results with different setups are more than welcome := ) [0]: http://git.code.paulk.fr/gitweb/?p=3Dlibettereboot.git;a=3Dblob;f=3Dpr= ojects/linux/configs/tegra124/config;h=3D4bd57ffdd8fa3d36e5dfadbbafc753a4f9= b34266;hb=3DHEAD --=20 Paul Kocialkowski, developer of free digital technology and hardware support Website: https://www.paulk.fr/ Coding blog: https://code.paulk.fr/ Git repositories: https://git.paulk.fr/ https://git.code.paulk.fr/ --=-ycJkbB2O8qsm+33v1pn5 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: This is a digitally signed message part Content-Transfer-Encoding: 7bit -----BEGIN PGP SIGNATURE----- iQIzBAABCAAdFiEEAbcMXZQMtj1fphLChP3B6o/ulQwFAlleYjEACgkQhP3B6o/u lQxSFQ//dFW3NuzEVGjQsu6e2Nk0Vtc8pPLhGA7C75UMaVk/uxMZA0f5gJ3h8Z16 Hh72Dk0DwbGPJTOSkuZn4+w9Y9ITv7NDo2J3fAeVtvSDfG0U7xunLLYgCvDnzXCu A4gZU+efI1ut40QChbIxYhg3O/iQCRXC6vn6BiMhbCRxE9fj627odeExM8fFSrTS hFUOQMjG1gRDdzV2NpQF5jNxD+uWN4w+OLXkuaaUqhSk2Ksl530YenHG1NHAVjBb UR7PBdEAhAOT8MxwgFOxEDm+aF9XHC8UD8E1atzt1VV4dKT0o7s1A6fuCyEnaZxe oVAwOv0rC9af9NtM+ID1wDejwt6pilrm83hSljEtUy+dM6fMEEzNIWk0gN8lpKir ouCO44NV0Zd81m+vr5dzqRrR17ZhWs65xICfuXQ+dZg1SHDRXWpf5gQ/ral0pNNZ hEp+T4TdLNs9Zro0ubhFMjkEsLH73dyjA/6599fzBXCMYMg4JT8bbrwIC3VnhdCo fQMYcYwUnM+8q5AQpvPfj22lUR26nI1yQoR8DEe1ETm83jgttYqjR9eWryMZSz3+ 1TWft0qFjwK7qlWTJ5p+a+ydYxmW6ypVnQOO+4TIpWy2x0rQACBtO5rypbFujNvw /C3c5WggysbltDoaGUO+MbXq9cFA4bEAMf9WKASEvj7OlASzqIE= =OPWz -----END PGP SIGNATURE----- --=-ycJkbB2O8qsm+33v1pn5--