diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2014-12-15 15:52:01 -0800 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-12-15 15:52:01 -0800 |
commit | 988adfdffdd43cfd841df734664727993076d7cb (patch) | |
tree | 6794f7bba8f595500c2b7d33376ad6614adcfaf2 /drivers/gpu/drm/msm/msm_atomic.c | |
parent | 26178ec11ef3c6c814bf16a0a2b9c2f7242e3c64 (diff) | |
parent | 4e0cd68115620bc3236ff4e58e4c073948629b41 (diff) |
Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux
Pull drm updates from Dave Airlie:
"Highlights:
- AMD KFD driver merge
This is the AMD HSA interface for exposing a lowlevel interface for
GPGPU use. They have an open source userspace built on top of this
interface, and the code looks as good as it was going to get out of
tree.
- Initial atomic modesetting work
The need for an atomic modesetting interface to allow userspace to
try and send a complete set of modesetting state to the driver has
arisen, and been suffering from neglect this past year. No more,
the start of the common code and changes for msm driver to use it
are in this tree. Ongoing work to get the userspace ioctl finished
and the code clean will probably wait until next kernel.
- DisplayID 1.3 and tiled monitor exposed to userspace.
Tiled monitor property is now exposed for userspace to make use of.
- Rockchip drm driver merged.
- imx gpu driver moved out of staging
Other stuff:
- core:
panel - MIPI DSI + new panels.
expose suggested x/y properties for virtual GPUs
- i915:
Initial Skylake (SKL) support
gen3/4 reset work
start of dri1/ums removal
infoframe tracking
fixes for lots of things.
- nouveau:
tegra k1 voltage support
GM204 modesetting support
GT21x memory reclocking work
- radeon:
CI dpm fixes
GPUVM improvements
Initial DPM fan control
- rcar-du:
HDMI support added
removed some support for old boards
slave encoder driver for Analog Devices adv7511
- exynos:
Exynos4415 SoC support
- msm:
a4xx gpu support
atomic helper conversion
- tegra:
iommu support
universal plane support
ganged-mode DSI support
- sti:
HDMI i2c improvements
- vmwgfx:
some late fixes.
- qxl:
use suggested x/y properties"
* 'drm-next' of git://people.freedesktop.org/~airlied/linux: (969 commits)
drm: sti: fix module compilation issue
drm/i915: save/restore GMBUS freq across suspend/resume on gen4
drm: sti: correctly cleanup CRTC and planes
drm: sti: add HQVDP plane
drm: sti: add cursor plane
drm: sti: enable auxiliary CRTC
drm: sti: fix delay in VTG programming
drm: sti: prepare sti_tvout to support auxiliary crtc
drm: sti: use drm_crtc_vblank_{on/off} instead of drm_vblank_{on/off}
drm: sti: fix hdmi avi infoframe
drm: sti: remove event lock while disabling vblank
drm: sti: simplify gdp code
drm: sti: clear all mixer control
drm: sti: remove gpio for HDMI hot plug detection
drm: sti: allow to change hdmi ddc i2c adapter
drm/doc: Document drm_add_modes_noedid() usage
drm/i915: Remove '& 0xffff' from the mask given to WA_REG()
drm/i915: Invert the mask and val arguments in wa_add() and WA_REG()
drm: Zero out DRM object memory upon cleanup
drm/i915/bdw: Fix the write setting up the WIZ hashing mode
...
Diffstat (limited to 'drivers/gpu/drm/msm/msm_atomic.c')
-rw-r--r-- | drivers/gpu/drm/msm/msm_atomic.c | 163 |
1 files changed, 163 insertions, 0 deletions
diff --git a/drivers/gpu/drm/msm/msm_atomic.c b/drivers/gpu/drm/msm/msm_atomic.c new file mode 100644 index 000000000000..f0de412e13dc --- /dev/null +++ b/drivers/gpu/drm/msm/msm_atomic.c @@ -0,0 +1,163 @@ +/* + * Copyright (C) 2014 Red Hat + * Author: Rob Clark <robdclark@gmail.com> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published by + * the Free Software Foundation. + * + * This program is distributed in the hope that 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/>. + */ + +#include "msm_drv.h" +#include "msm_kms.h" +#include "msm_gem.h" + +struct msm_commit { + struct drm_atomic_state *state; + uint32_t fence; + struct msm_fence_cb fence_cb; +}; + +static void fence_cb(struct msm_fence_cb *cb); + +static struct msm_commit *new_commit(struct drm_atomic_state *state) +{ + struct msm_commit *c = kzalloc(sizeof(*c), GFP_KERNEL); + + if (!c) + return NULL; + + c->state = state; + /* TODO we might need a way to indicate to run the cb on a + * different wq so wait_for_vblanks() doesn't block retiring + * bo's.. + */ + INIT_FENCE_CB(&c->fence_cb, fence_cb); + + return c; +} + +/* The (potentially) asynchronous part of the commit. At this point + * nothing can fail short of armageddon. + */ +static void complete_commit(struct msm_commit *c) +{ + struct drm_atomic_state *state = c->state; + struct drm_device *dev = state->dev; + + drm_atomic_helper_commit_pre_planes(dev, state); + + drm_atomic_helper_commit_planes(dev, state); + + drm_atomic_helper_commit_post_planes(dev, state); + + drm_atomic_helper_wait_for_vblanks(dev, state); + + drm_atomic_helper_cleanup_planes(dev, state); + + drm_atomic_state_free(state); + + kfree(c); +} + +static void fence_cb(struct msm_fence_cb *cb) +{ + struct msm_commit *c = + container_of(cb, struct msm_commit, fence_cb); + complete_commit(c); +} + +static void add_fb(struct msm_commit *c, struct drm_framebuffer *fb) +{ + struct drm_gem_object *obj = msm_framebuffer_bo(fb, 0); + c->fence = max(c->fence, msm_gem_fence(to_msm_bo(obj), MSM_PREP_READ)); +} + + +/** + * drm_atomic_helper_commit - commit validated state object + * @dev: DRM device + * @state: the driver state object + * @async: asynchronous commit + * + * This function commits a with drm_atomic_helper_check() pre-validated state + * object. This can still fail when e.g. the framebuffer reservation fails. For + * now this doesn't implement asynchronous commits. + * + * RETURNS + * Zero for success or -errno. + */ +int msm_atomic_commit(struct drm_device *dev, + struct drm_atomic_state *state, bool async) +{ + struct msm_commit *c; + int nplanes = dev->mode_config.num_total_plane; + int i, ret; + + ret = drm_atomic_helper_prepare_planes(dev, state); + if (ret) + return ret; + + c = new_commit(state); + + /* + * Figure out what fence to wait for: + */ + for (i = 0; i < nplanes; i++) { + struct drm_plane *plane = state->planes[i]; + struct drm_plane_state *new_state = state->plane_states[i]; + + if (!plane) + continue; + + if ((plane->state->fb != new_state->fb) && new_state->fb) + add_fb(c, new_state->fb); + } + + /* + * This is the point of no return - everything below never fails except + * when the hw goes bonghits. Which means we can commit the new state on + * the software side now. + */ + + drm_atomic_helper_swap_state(dev, state); + + /* + * Everything below can be run asynchronously without the need to grab + * any modeset locks at all under one conditions: It must be guaranteed + * that the asynchronous work has either been cancelled (if the driver + * supports it, which at least requires that the framebuffers get + * cleaned up with drm_atomic_helper_cleanup_planes()) or completed + * before the new state gets committed on the software side with + * drm_atomic_helper_swap_state(). + * + * This scheme allows new atomic state updates to be prepared and + * checked in parallel to the asynchronous completion of the previous + * update. Which is important since compositors need to figure out the + * composition of the next frame right after having submitted the + * current layout. + */ + + if (async) { + msm_queue_fence_cb(dev, &c->fence_cb, c->fence); + return 0; + } + + ret = msm_wait_fence_interruptable(dev, c->fence, NULL); + if (ret) { + WARN_ON(ret); // TODO unswap state back? or?? + kfree(c); + return ret; + } + + complete_commit(c); + + return 0; +} |