kernel/drivers/gpu/host1x/intr.c, branch linux-6.9.y

gpu: host1x: Rewrite syncpoint interrupt handling

2023-01-26T14:55:38Z

Move from the old, complex intr handling code to a new implementation based on dma_fences. While there is a fair bit of churn to get there, the new implementation is much simpler and likely faster as well due to allowing signaling directly from interrupt context. Signed-off-by: Mikko Perttunen Signed-off-by: Thierry Reding

gpu: host1x: Add initial runtime PM and OPP support

2021-12-16T13:07:07Z

Add runtime PM and OPP support to the Host1x driver. For the starter we will keep host1x always-on because dynamic power management require a major refactoring of the driver code since lot's of code paths are missing the RPM handling and we're going to remove some of these paths in the future. Reviewed-by: Ulf Hansson Tested-by: Peter Geis # Ouya T30 Tested-by: Paul Fertser # PAZ00 T20 Tested-by: Nicolas Chauvet # PAZ00 T20 and TK1 T124 Tested-by: Matt Merhar # Ouya T30 Signed-off-by: Dmitry Osipenko Signed-off-by: Thierry Reding

gpu: host1x: Add DMA fence implementation

2021-08-10T12:39:50Z

Add an implementation of dma_fences based on syncpoints. Syncpoint interrupts are used to signal fences. Additionally, after software signaling has been enabled, a 30 second timeout is started. If the syncpoint threshold is not reached within this period, the fence is signalled with an -ETIMEDOUT error code. This is to allow fences that would never reach their syncpoint threshold to be cleaned up. The timeout can potentially be removed in the future after job tracking code has been refactored. Signed-off-by: Mikko Perttunen Signed-off-by: Thierry Reding

gpu: host1x: Assign intr waiter inside lock

2021-03-31T15:42:14Z

Move the assignment of the ref out-pointer in host1x_intr_add_action to happen within the spinlock. With the current arrangement, it is possible for the waiter to complete before the assignment has happened, which breaks horribly if the waiter completion callback tries to use the reference. In practice, there is currently no situation where this issue can manifest -- it was first noticed with the upcoming DMA fence implementation patches. As such this doesn't need to be backported. Signed-off-by: Mikko Perttunen Signed-off-by: Thierry Reding

gpu: host1x: Remove cancelled waiters immediately

2021-03-30T17:53:24Z

Before this patch, cancelled waiters would only be cleaned up once their threshold value was reached. Make host1x_intr_put_ref process the cancellation immediately to fix this. Signed-off-by: Mikko Perttunen Signed-off-by: Thierry Reding

gpu: host1x: Remove gratuitous blank line

2019-10-28T10:18:33Z

Signed-off-by: Thierry Reding

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 201

2019-05-30T18:29:52Z

Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms and conditions of the gnu general public license version 2 as published by the free software foundation this program is distributed in the hope it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details you should have received a copy of the gnu general public license along with this program if not see http www gnu org licenses extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 228 file(s). Signed-off-by: Thomas Gleixner Reviewed-by: Allison Randal Reviewed-by: Steve Winslow Reviewed-by: Richard Fontana Reviewed-by: Alexios Zavras Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190528171438.107155473@linutronix.de Signed-off-by: Greg Kroah-Hartman

gpu: host1x: Drop unnecessary host1x argument

2018-05-18T19:51:01Z

Functions taking a pointer to a host1x syncpoint as an argument don't need to specify a pointer to a host1x instance because it can be obtained from the syncpoint. Reviewed-by: Dmitry Osipenko Tested-by: Dmitry Osipenko Signed-off-by: Thierry Reding

gpu: host1x: Cleanup loop variable usage

2018-05-18T19:50:40Z

Use unsigned int where possible and don't unnecessarily initialize the loop variable. Reviewed-by: Dmitry Osipenko Tested-by: Dmitry Osipenko Signed-off-by: Thierry Reding

gpu: host1x: Constify array of action handlers

2016-06-23T09:59:31Z

This array never needs to be modified and therefore can be read-only data. Signed-off-by: Thierry Reding