Date: Thu, 15 Dec 2005 21:33:21 -0500 From: Anish Mistry <mistry.7@osu.edu> To: John Baldwin <jhb@freebsd.org> Cc: freebsd-current@freebsd.org Subject: Re: hostb(4) and vgapci(4) patch Message-ID: <200512152133.28401.mistry.7@osu.edu> In-Reply-To: <200512151631.26253.jhb@freebsd.org> References: <200512141720.01572.jhb@freebsd.org> <200512150033.13676.mistry.7@osu.edu> <200512151631.26253.jhb@freebsd.org>
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--nextPart1421191.V91OXEagrC Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline On Thursday 15 December 2005 04:31 pm, you wrote: > On Thursday 15 December 2005 12:32 am, Anish Mistry wrote: > > On Wednesday 14 December 2005 05:20 pm, John Baldwin wrote: > > > I have a patch that is an attempt to untangle a few things in > > > relation to Host-PCI bridges and VGA PCI devices. Basically, > > > the change is to create a more "real" hostb driver as well as a > > > new vgapci driver and to change agp, drm, and acpi_video to > > > attach to these drivers. This means among other things: > > > > > > - In theory you can now kldload agp after boot since it still > > > has a place to attach to. > > > - i830/915 drm is no longer a child of agp, instead both become > > > children of vgapci0. > > > - You can now use acpi_video with drm as both attach as > > > children of vgapci0. - This provides a way for us to possibly > > > solve the DPMS problem for suspend/resume (including a cleaner > > > way to do the hack dpms patch I posted to acpi@ a long while > > > ago that several people still use). > > > > > > Some other details include: > > > > > > - agp devices no longer map the _entire_ aperture into > > > contiguous KVA meaning that it might be possible now to use a > > > 256 MB aperture without panicing - I've added a new pci_if.m > > > method for locating a specific capability for a PCI device. > > > > > > I have tested this on my laptop and verified that dri still > > > works, but it needs some wider testing, especially the > > > i830/i915 case is slightly more complicated. Also, this is not > > > going to work with the nvidia-driver currently, but that's > > > something that can be fixed in the future. If the agp > > > non-mapping does fix the 256 MB aperture issues then I will > > > probably MFC that part to RELENG_6. > > > > > > http://www.FreeBSD.org/~jhb/patches/agp_cvs.patch > > > > Thank you! It seems to work as advertised. I'm running mach64 > > DRM with the DPMS patch acpi_video and they both work. :) > > One small problem though. When I unload the acpi_video module > > and reload it I get the following: > > littleguy# kldload acpi_video > > acpi_video0: <ACPI video extension> on vgapci0 > > acpi_video1: <ACPI video extension> on vgapci0 > > littleguy# kldunload acpi_video > > acpi_video0: detached > > acpi_video1: detached > > littleguy# kldunload acpi_video > > kldunload: can't find file acpi_video: No such file or directory > > littleguy# kldload acpi_video > > acpi_video0: <ACPI video extension> on vgapci0 > > acpi_video1: <ACPI video extension> on vgapci0 > > acpi_video2: <ACPI video extension> on vgapci0 > > littleguy# > > It also created multiple sysctls with subsequent loads: > > hw.acpi.video.crt0.active: 1 > > hw.acpi.video.lcd0.active: 1 > > hw.acpi.video.tv0.active: 0 > > hw.acpi.video.crt1.active: 1 > > hw.acpi.video.lcd1.active: 1 > > hw.acpi.video.tv1.active: 0 > > hw.acpi.video.crt2.active: 1 > > hw.acpi.video.lcd2.active: 1 > > hw.acpi.video.tv2.active: 0 > > Revert just the changes to acpi_video.c and then apply the attached > patch to see if it fixes the multiple load issue. Yes. The patch corrects the problem. Thanks, =2D-=20 Anish Mistry --nextPart1421191.V91OXEagrC Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.2 (FreeBSD) iD8DBQBDoid4xqA5ziudZT0RAihVAJ90ETIsXJdNc5cVrkTfmqhJih+D+wCeMH+f 74tUWosdc0rBhmvIU5df9U8= =QfsN -----END PGP SIGNATURE----- --nextPart1421191.V91OXEagrC--
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