Hi Thomas.
On Thu, Jul 16, 2020 at 02:53:47PM +0200, Thomas Zimmermann wrote:
> 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
Series looks good now. All patches are:
Reviewed-by: Sam Ravnborg <s...@ravnborg.org>
Sam
>
> 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
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