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In the commitec6d61cbdd("mesa: enable native and nativesdk variants"), the gallium is enabled for the mesa. Since we use the modesetting driver for the Xorg on the beagleboard and the glamor acceleration method is enabled by the modesetting driver, the gallium DRI driver will be used after this commit. But the gallium DRI driver only support 32bpp and we choose to use 16bpp on beaglebone in commite7434c17b4("meta-yocto-bsp: workaround the X malfunction on beaglebone"), the mismatch between them causes the malfunction of the Xorg. I have hacked the kernel to enable the 32bpp for the beagllebone, but it has the following issues: 1. The color is abnormal. 2. The Xorg hang occasionally. 3. The performance of using glamor acceleration based on gallium is pretty bad. So I choose to disable the glamor on this board. (From meta-yocto rev: b7a995856c58b507a521a55dcf94bee75804e81c) Signed-off-by: Kevin Hao <kexin.hao@windriver.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
QEMU Emulation Targets ====================== To simplify development, the build system supports building images to work with the QEMU emulator in system emulation mode. Several architectures are currently supported in 32 and 64 bit variants: * ARM (qemuarm + qemuarm64) * x86 (qemux86 + qemux86-64) * PowerPC (qemuppc only) * MIPS (qemumips + qemumips64) Use of the QEMU images is covered in the Yocto Project Reference Manual. The appropriate MACHINE variable value corresponding to the target is given in brackets.