This is the second patchset for converting ast to managed DRM interfaces. This one addresses memory management. There will be another, final round of patches for converting DRM device structures as well.
Patch #1 introduces managed initialization for VRAM MM. Other drivers using the VRAM helpers should be converted to this at some point.
Patches #2 to #4 do some preparation that make ast look slightly nicer.
Patch #5 fixes a long-standing bug that I found as part of the rework. Posting the GPU requires information about the installed DRAM. So the DRAM detection has to run before the GPU-posting code. This got reversed by a fix in v4.11. The patch restores the original correct order of these operations. As the GPU is usually posted by the VGA BIOS, the problem might not have shown up in practice.
With all the cleanups in place, patch #6 switches memory management to mnaged interfaces.
Tested on AST2100 HW.
v2: * reworked managed VRAM MM; new interface name, returns errno code, improved documentation (Sam)
Thomas Zimmermann (6): drm/vram-helper: Managed vram helpers drm/ast: Rename ast_ttm.c to ast_mm.c drm/ast: Use managed VRAM-helper initialization drm/ast: Move VRAM size detection to ast_mm.c drm/ast: Initialize DRAM type before posting GPU drm/ast: Use managed MM initialization
drivers/gpu/drm/ast/Makefile | 2 +- drivers/gpu/drm/ast/ast_drv.h | 2 - drivers/gpu/drm/ast/ast_main.c | 45 ++--------- drivers/gpu/drm/ast/{ast_ttm.c => ast_mm.c} | 77 ++++++++++++++----- drivers/gpu/drm/drm_gem_vram_helper.c | 84 ++++++++++++--------- include/drm/drm_gem_vram_helper.h | 3 + 6 files changed, 115 insertions(+), 98 deletions(-) rename drivers/gpu/drm/ast/{ast_ttm.c => ast_mm.c} (63%)
-- 2.27.0