This patchset puts device initialization in the correct order and adds support for G200 Desktop chips (PCI ids 0x520 and 0x521).
The first 7 patches prepare the driver. Desktop chips would probably work without them, but since we're at it we can also do it right.
Patch 1 enables cached page mappings GEM buffers. SHMEM supports this well now and the MGA device does not access the buffer memory directly. So now corrupt display output is to be expected.
Patches 2 to 6 fix the initialization of device registers. Several fundamental registers were only done late during device initialization. This was probably not a problem in practice, as the VGA BIOS does the setup iduring POST anyway. These patches move the code to the beginning of the device initialization. If we ever have to POST a MGA device from the driver, the corect order of operations counts.
G200SEs store a unique id in the device structure. Patch 7 moves the value to model-specific data area. This will be helpful for patch 8.
Patch 8 adds support for desktop chips' PCI ids. all the memory and modesetting code continues to work as before. The PLL setup code gets an additional helper for the new HW. PCI and DAC regsiters get a few new default values. Most significantly, the driver parses the VGA BIOS for clock settings. It's all separate from the server code, so no regressions are to be expected.
The new HW support is based on an earlier patch the was posted in July 2017. [1]
Tested on G200EW and G200 AGP hardware by running the fbdev console, Weston and Gnome on Xorg.
[1] https://lists.freedesktop.org/archives/dri-devel/2017-July/147647.html
Thomas Zimmermann (8): drm/mgag200: Enable caching for SHMEM pages drm/mgag200: Move register initialization into helper function drm/mgag200: Initialize PCI registers early during device setup drm/mgag200: Enable MGA mode during device register initialization drm/mgag200: Set MISC memory flags in mm init code drm/mgag200: Clear <page> field during MM init drm/mgag200: Move G200SE's unique id into model-specific data drm/mgag200: Add support for G200 desktop cards
MAINTAINERS | 2 +- drivers/gpu/drm/mgag200/Kconfig | 12 +- drivers/gpu/drm/mgag200/mgag200_drv.c | 213 +++++++++++++++++++++++-- drivers/gpu/drm/mgag200/mgag200_drv.h | 19 ++- drivers/gpu/drm/mgag200/mgag200_mm.c | 8 + drivers/gpu/drm/mgag200/mgag200_mode.c | 153 +++++++++++------- drivers/gpu/drm/mgag200/mgag200_reg.h | 4 + 7 files changed, 328 insertions(+), 83 deletions(-)
-- 2.27.0