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init() was removed from ramgp102 when reworking the memory detection, as
it was thought that the code was only necessary when the driver performs
mclk changes, which nouveau doesn't support on pascal.
However, it turns out that we still need to execute this on some GPUs to
restore settings after DEVINIT, so revert to the original behaviour.
v2: fix tags in commit message, cc stable
Closes: https://gitlab.freedesktop.org/drm/nouveau/-/issues/319
Fixes: 2c0c15a22fa0 ("drm/nouveau/fb/gp102-ga100: switch to simpler vram size detection method")
Cc: stable@vger.kernel.org # 6.6+
Signed-off-by: Ben Skeggs <bskeggs@nvidia.com>
Signed-off-by: Danilo Krummrich <dakr@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20240904232418.8590-1-bskeggs@nvidia.com
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Explicitly declare constants as unsigned long long to address the
following sparse warnings:
warning: constant is so big it is long
v2: convert to unsigned long long for compatibility with 32-bit
architectures.
Signed-off-by: Wambui Karuga <wambui.karugax@gmail.com>
Suggested by: lia Mirkin <imirkin@alum.mit.edu>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
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Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
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Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
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This commit reworks the RAM detection algorithm, using RAM-per-LTC to
determine whether a board has a mixed-memory configuration instead of
using RAM-per-FBPA. I'm not certain the algorithm is perfect, but it
should handle all currently known configurations in the very least.
This should fix GTX 970 boards with 4GiB of RAM where the last 512MiB
isn't fully accessible, as well as only detecting half the VRAM on
GF108 boards.
As a nice side-effect, GP10x memory detection now reuses the majority
of the code from earlier chipsets.
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
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In this situation, we'd have ended up detecting less VRAM than we have.
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
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Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
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