On 7/6/26 5:04 PM, Dmitry Baryshkov wrote:
On Sun, Jul 05, 2026 at 09:13:37PM +0200, Anna Maniscalco wrote:
In order to associate the SID used by LPAC to it's own domain and
context bank we need a separate node on the DTS.
Can we use iommu-map instead of adding a new device using the same
addresses? You provide zero explanations, but it seems like you are
trying to separate a part of the GPU into a separate device, but it's
unnecessary.
What I was trying to say is that we need to map sid0 and sid1 to
different context banks.
From what I recall, so long as we use the same dt node, the iommu
drivert provides no way of doing this.
What kgsl does is having a node for the iommu and then subnodes for gfx
lpac and secure.
The address on the lpac device doesn't really matter. I have very limted
knowledge of DTSs but I think we could just leave it out altogether?
Add the code to look up that node on initialization.
Signed-off-by: Anna Maniscalco <[email protected]>
---
drivers/gpu/drm/msm/adreno/adreno_gpu.c | 21 ++++++++++++++++++++-
drivers/gpu/drm/msm/msm_gpu.h | 1 +
2 files changed, 21 insertions(+), 1 deletion(-)
Best regards,
--
Anna Maniscalco <[email protected]>
