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bfc29606e4
If drmMinor >= 6, the intel DDX driver will enable vblank events on both pipes. If drmMinor >= 10 on pre-965 chipsets, the intel DDX driver will swap the pipe<->plane mapping to allow for framebuffer compression on laptop screens. This means the secondary vblank counter (corresponding to pipe B) will be incremented when vblank interrupts occur. Now Mesa waits for vblank events on whichever plane has a greater portion of the displayed window. So it will happly ask to wait for the primary counter even though that one won't increment. So we can fix this in either the DDX driver, Mesa or the kernel (though I thought we already had several times). Since current (and previous) userspace assumes it's talking about a pipe == plane situation and now uses planes when talking to the kernel, we should probably just hide the mapping details there (indeed they already are hidden there for vblank swaps), which this patch does. So as far as userland is concerned, whether we call things planes or pipes is irrelevant, as long as kernel developers understand that userland hands them planes and they have to figure out which pipe that corresponds to (which will typically be the same on 965+ hardware and reversed on pre-965 mobile chips). |
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| bsd-core | ||
| libdrm | ||
| linux-core | ||
| scripts | ||
| shared-core | ||
| tests | ||
| .gitignore | ||
| autogen.sh | ||
| configure.ac | ||
| libdrm.pc.in | ||
| Makefile.am | ||
| README | ||
DRM README file There are two main parts to this package: the DRM client library/interface (libdrm.so) and kernel/hardware-specific device modules (such as i915.ko). Compiling --------- By default, libdrm and the DRM header files will install into /usr/local/. If you want to install this DRM to replace your system copy, say: ./configure --prefix=/usr --exec-prefix=/ Then, make install To build the device-specific kernel modules: cd linux-core/ make cp *.ko /lib/modules/VERSION/kernel/drivers/char/drm/ (where VERSION is your kernel version: uname -f) Or, cd bsd-core/ make copy the kernel modules to the appropriate place Tips & Trouble-shooting ----------------------- 1. You'll need kernel sources. If using Fedora Core 5, for example, you may need to install RPMs such as: kernel-smp-devel-2.6.15-1.2054_FC5.i686.rpm kernel-devel-2.6.15-1.2054_FC5.i686.rpm etc. 2. You may need to make a symlink from /lib/modules/VERSION/build to your kernel sources in /usr/src/kernels/VERSION (where version is `uname -r`): cd /lib/modules/VERSION ln -s /usr/src/kernels/VERSION build 3. If you've build the kernel modules but they won't load because of an error like this: $ /sbin/modprobe drm FATAL: Error inserting drm (/lib/modules/2.6.15-1.2054_FC5smp/kernel/drivers/char/drm/drm.ko): Invalid module format And 'dmesg|tail' says: drm: disagrees about version of symbol struct_module Try recompiling your drm modules without the Module.symvers file. That is rm the /usr/src/kernels/2.6.15-1.2054_FC5-smp-i686/Module.symvers file (or rename it). Then do a 'make clean' before rebuilding your drm modules.