linux-stable.git/drivers/gpu/drm/tegra, branch v5.15.78

drm/tegra: vic: Fix build warning when CONFIG_PM=n

2022-09-23T12:15:46+00:00

[ Upstream commit b5d5288a46876f6767950449aea310f71ac86277 ]

drivers/gpu/drm/tegra/vic.c:326:12: error: ‘vic_runtime_suspend’ defined but not used [-Werror=unused-function]
 static int vic_runtime_suspend(struct device *dev)
            ^~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/tegra/vic.c:292:12: error: ‘vic_runtime_resume’ defined but not used [-Werror=unused-function]
 static int vic_runtime_resume(struct device *dev)
            ^~~~~~~~~~~~~~~~~~

Mark it as __maybe_unused.

Signed-off-by: YueHaibing 
Signed-off-by: Thierry Reding 
Stable-dep-of: c7860cbee998 ("drm/tegra: Fix vmapping of prime buffers")
Signed-off-by: Sasha Levin

drm/tegra: Fix reference leak in tegra_dsi_ganged_probe

2022-04-08T12:23:35+00:00

[ Upstream commit 221e3638feb8bc42143833c9a704fa89b6c366bb ]

The reference taken by 'of_find_device_by_node()' must be released when
not needed anymore. Add put_device() call to fix this.

Fixes: e94236cde4d5 ("drm/tegra: dsi: Add ganged mode support")
Signed-off-by: Miaoqian Lin 
Signed-off-by: Thierry Reding 
Signed-off-by: Sasha Levin

drm/tegra: submit: Add missing pm_runtime_mark_last_busy()

2022-01-27T10:05:11+00:00

commit a21115dd38c6cf396ba39aefd561e7903ca6149d upstream.

Runtime PM auto-suspension doesn't work without pm_runtime_mark_last_busy(),
add it.

Cc: 
Reviewed-by: Ulf Hansson 
Signed-off-by: Dmitry Osipenko 
Signed-off-by: Thierry Reding 
Signed-off-by: Greg Kroah-Hartman

drm/tegra: vic: Fix DMA API misuse

2022-01-27T10:03:39+00:00

[ Upstream commit 5566174cb10a5167d59b0793871cab7990b149b8 ]

Upon failure, dma_alloc_coherent() returns NULL. If that does happen,
passing some uninitialised stack contents to dma_mapping_error() - which
belongs to a different API in the first place - has precious little
chance of detecting it.

Also include the correct header, because the fragile transitive
inclusion currently providing it is going to break soon.

Fixes: 20e7dce255e9 ("drm/tegra: Remove memory allocation from Falcon library")
CC: Thierry Reding 
CC: Mikko Perttunen 
CC: dri-devel@lists.freedesktop.org
Signed-off-by: Robin Murphy 
Reviewed-by: Christoph Hellwig 
Signed-off-by: Thierry Reding 
Signed-off-by: Sasha Levin

drm/tegra: gr2d: Explicitly control module reset

2022-01-27T10:03:39+00:00

[ Upstream commit 271fca025a6d43f1c18a48543c5aaf31a31e4694 ]

As of commit 4782c0a5dd88 ("clk: tegra: Don't deassert reset on enabling
clocks"), module resets are no longer automatically deasserted when the
module clock is enabled. To make sure that the gr2d module continues to
work, we need to explicitly control the module reset.

Fixes: 4782c0a5dd88 ("clk: tegra: Don't deassert reset on enabling clocks")
Signed-off-by: Thierry Reding 
Signed-off-by: Sasha Levin

drm/tegra: Add back arm_iommu_detach_device()

2022-01-27T10:02:59+00:00

commit d210919dbdc8a82c676cc3e3c370b1802be63124 upstream.

DMA buffers of 2D/3D engines aren't mapped properly when
CONFIG_ARM_DMA_USE_IOMMU=y. The memory management code of Tegra DRM driver
has a longstanding overhaul overdue and it's not obvious where the problem
is in this case. Hence let's add back the old workaround which we already
had sometime before. It explicitly detaches DRM devices from the offending
implicit IOMMU domain. This fixes a completely broken 2d/3d drivers in
case of ARM32 multiplatform kernel config.

Cc: stable@vger.kernel.org
Fixes: fa6661b7aa0b ("drm/tegra: Optionally attach clients to the IOMMU")
Signed-off-by: Dmitry Osipenko 
Signed-off-by: Thierry Reding 
Signed-off-by: Greg Kroah-Hartman

drm/tegra: uapi: Fix wrong mapping end address in case of disabled IOMMU

2021-09-16T16:06:51+00:00

All jobs are failing on Tegra20 because it doesn't use IOMMU and mapping
function uses size of mapping that is zero instead of BO size, fix it.

Fixes: d7c591bc1a3f ("drm/tegra: Implement new UAPI")
Signed-off-by: Dmitry Osipenko 
Reviewed-by: Mikko Perttunen 
Signed-off-by: Thierry Reding

drm/tegra: dc: Remove unused variables

2021-09-16T16:06:50+00:00

Remove unused variables from tegra_crtc_update_memory_bandwidth().

Fixes: 04d5d5df9df7 ("drm/tegra: dc: Support memory bandwidth management")
Reported-by: kernel test robot 
Signed-off-by: Dmitry Osipenko 
Reviewed-by: Mikko Perttunen 
Signed-off-by: Thierry Reding

Merge tag 'drm/tegra/for-5.15-rc1' of ssh://git.freedesktop.org/git/tegra/linux into drm-next

2021-08-26T03:05:19+00:00

drm/tegra: Changes for v5.15-rc1

The bulk of these changes is a more modern ABI that can be efficiently
used on newer SoCs as well as older ones. The userspace parts for this
are available here:

  - libdrm support: https://gitlab.freedesktop.org/tagr/drm/-/commits/drm-tegra-uabi-v8
  - VAAPI driver: https://github.com/cyndis/vaapi-tegra-driver

In addition, existing userspace from the grate reverse-engineering
project has been updated to use this new ABI:

  - X11 driver: https://github.com/grate-driver/xf86-video-opentegra
  - 3D driver: https://github.com/grate-driver/grate

Other than that, there's also support for display memory bandwidth
management for various generations and a bit of cleanup.

Signed-off-by: Dave Airlie 

From: Thierry Reding 
Link: https://patchwork.freedesktop.org/patch/msgid/20210813163616.2822355-1-thierry.reding@gmail.com

drm/tegra: dc: Extend debug stats with total number of events

2021-08-13T10:31:07+00:00

It's useful to know the total number of underflow events and currently
the debug stats are getting reset each time CRTC is being disabled. Let's
account the overall number of events that doesn't get a reset.

Reviewed-by: Michał Mirosław 
Signed-off-by: Dmitry Osipenko 
Signed-off-by: Thierry Reding