Re: [PATCH] gpu: host1x: Skip reset assert on Tegra186

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On 2/23/24 03:06, Thierry Reding wrote:
On Thu Feb 22, 2024 at 2:05 AM CET, Mikko Perttunen wrote:
From: Mikko Perttunen <mperttunen@xxxxxxxxxx>

On Tegra186, secure world applications may need to access host1x
during suspend/resume, and rely on the kernel to keep Host1x out
of reset during the suspend cycle. As such, as a quirk,
skip asserting Host1x's reset on Tegra186.

We don't need to keep the clocks enabled, as BPMP ensures the clock
stays on while Host1x is being used. On newer SoC's, the reset line
is inaccessible, so there is no need for the quirk.

Signed-off-by: Mikko Perttunen <mperttunen@xxxxxxxxxx>
---
  drivers/gpu/host1x/dev.c | 15 +++++++++------
  drivers/gpu/host1x/dev.h |  6 ++++++
  2 files changed, 15 insertions(+), 6 deletions(-)

Applied to drm-misc-fixes, though I added the Fixes: tag that Jon
mentioned in reply to v1 of this as well as his Reviewed-by and
Tested-by as well, since this is pretty much the same patch except
for the comments.

Thanks. Sorry for messing it up :p

Mikko


Thanks,
Thierry




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