- 26 Jul, 2020 1 commit
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Vinod Koul authored
Add prefix for Lontium Semiconductor Corporation Acked-by:
Rob Herring <robh@kernel.org> Tested-by:
John Stultz <john.stultz@linaro.org> Signed-off-by:
Vinod Koul <vkoul@kernel.org> Signed-off-by:
Sam Ravnborg <sam@ravnborg.org> Link: https://patchwork.freedesktop.org/patch/msgid/20200723163442.1280414-2-vkoul@kernel.org
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- 24 Jul, 2020 1 commit
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Ville Syrjälä authored
Add a TODO for plumbing drm_atomic_state all over to ease the hurdles of accessing additional object states. Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch> #irc Signed-off-by:
Ville Syrjälä <ville.syrjala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20200717135439.5996-1-ville.syrjala@linux.intel.com
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- 23 Jul, 2020 1 commit
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Linus Walleij authored
Remove notes about migrating from the old driver which is retired as all users are now migrated. Update the text to reflect that we support PL110 and PL111 alike. Drop the bullet on memory bandwidth scaling: this has been implemented. Signed-off-by:
Linus Walleij <linus.walleij@linaro.org> Acked-by:
Daniel Vetter <daniel.vetter@ffwll.ch> Cc: Russell King <linux@armlinux.org.uk> Link: https://patchwork.freedesktop.org/patch/msgid/20200720130327.92364-1-linus.walleij@linaro.org
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- 22 Jul, 2020 3 commits
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Christian König authored
Not used any more. And it is bad design to use a TTM flag to do a check inside a driver. Signed-off-by:
Christian König <christian.koenig@amd.com> Reviewed-by:
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Christian König authored
The driver does support some not-mapable resources, but those are already handled correctly in the switch/case statement in the code. Signed-off-by:
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Christian König authored
The driver doesn't expose any not-mapable memory resources. Signed-off-by:
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- 21 Jul, 2020 19 commits
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Ondrej Jirman authored
The display has one port. Allow it in the binding. Reviewed-by:
Guido Günther <agx@sigxcpu.org> Signed-off-by:
Ondrej Jirman <megous@megous.com> Signed-off-by:
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Ondrej Jirman authored
The example is now validated against rocktech,jh057n00900 schema that was ported to yaml, and didn't validate with: - '#address-cells', '#size-cells', 'port@0' do not match any of the regexes: 'pinctrl-[0-9]+' - 'vcc-supply' is a required property - 'iovcc-supply' is a required property - 'reset-gpios' is a required property Fix it. Reviewed-by:
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Lyude Paul authored
This is an ioctl callback, so we're guaranteed to have IRQs enabled when calling this function. Use the plain _irq() variants of spin_(un)lock() to make this more obvious. Signed-off-by:
Lyude Paul <lyude@redhat.com> Cc: Daniel Vetter <daniel@ffwll.ch> Link: https://patchwork.freedesktop.org/patch/msgid/20200720190736.180297-6-lyude@redhat.comReviewed-by:
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Lyude Paul authored
This one's easy - we're already calling kzalloc(GFP_KERNEL) in this function, so we must already be guaranteed to have IRQs enabled when calling this. So, use the plain _irq() variants of spin_(un)lock() to make this more obvious. Signed-off-by:
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Lyude Paul authored
This function is only ever called from ioctl context, so we're guaranteed to have interrupts enabled. Stop using the irqsave/irqrestore variants of spin_(un)lock_irq() to make this more obvious. Signed-off-by:
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Lyude Paul authored
This is only called from: * Atomic modesetting hooks * Module probing routines * Legacy modesetting hooks All of which have IRQs enabled, so we can also get rid of irqsave/restore here to make the IRQ context of this function more obvious. Signed-off-by:
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Lyude Paul authored
All of the drivers in the kernel tree only call this from one of the following contexts: * drm_crtc_funcs->reset * During initial module load Since both of these contexts are guaranteed to have interrupts enabled beforehand, there's no need to use the irqsave/irqrestore variants of spin_(un)lock(). So, fix this to make the irq context of this function more obvious. Signed-off-by:
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Christian König authored
The driver doesn't expose any not-mapable memory resources. v2: remove unused man variable as well Signed-off-by:
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Christian König authored
The driver doesn't expose any not-mapable memory resources. Signed-off-by:
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Christian König authored
The driver doesn't expose any not-mapable memory resources. Signed-off-by:
Thomas Zimmermann <tzimmermann@suse.de> Reviewed-by:
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Christian König authored
The original intention was to avoid CPU page table unmaps when BOs move between the GTT and SYSTEM domain. The problem is that this never correctly handled changes in the caching attributes or backing pages. Just drop this for now and simply unmap the CPU page tables in all cases. Signed-off-by:
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Christian König authored
Only functional change is to always keep io_reserved_count up to date for debugging even when it is not used otherwise. Signed-off-by:
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Christian König authored
Just use the use_io_reserve_lru flag. It doesn't make much sense to have two flags. Signed-off-by:
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Christian König authored
Nouveau is the only user of this functionality and evicting io space on -EAGAIN is really a misuse of the return code. Instead switch to using -ENOSPC here which makes much more sense and simplifies the code. This could unbreak something as we now cleanly return EAGAIN, but the chance for this are rather low. Signed-off-by:
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Christian König authored
Implementing those is completely unnecessary. Signed-off-by:
Madhav Chauhan <madhav.chauhan@amd.com> Link: https://patchwork.freedesktop.org/patch/378236/
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Daniel Vetter authored
Comes up every few years, gets somewhat tedious to discuss, let's write this down once and for all. What I'm not sure about is whether the text should be more explicit in flat out mandating the amdkfd eviction fences for long running compute workloads or workloads where userspace fencing is allowed. v2: Now with dot graph! v3: Typo (Dave Airlie) Reviewed-by:
Thomas Hellstrom <thomas.hellstrom@intel.com> Acked-by:
Jason Ekstrand <jason@jlekstrand.net> Acked-by:
Daniel Stone <daniels@collabora.com> Acked-by:
Dave Airlie <airlied@redhat.com> Reviewed-by:
Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Cc: Jesse Natalie <jenatali@microsoft.com> Cc: Steve Pronovost <spronovo@microsoft.com> Cc: Jason Ekstrand <jason@jlekstrand.net> Cc: Felix Kuehling <Felix.Kuehling@amd.com> Cc: Mika Kuoppala <mika.kuoppala@intel.com> Cc: Thomas Hellstrom <thomas.hellstrom@intel.com> Cc: linux-media@vger.kernel.org Cc: linaro-mm-sig@lists.linaro.org Cc: linux-rdma@vger.kernel.org Cc: amd-gfx@lists.freedesktop.org Cc: intel-gfx@lists.freedesktop.org Cc: Chris Wilson <chris@chris-wilson.co.uk> Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Cc: Christian König <christian.koenig@amd.com> Signed-off-by:
Daniel Vetter <daniel.vetter@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20200709123339.547390-1-daniel.vetter@ffwll.ch
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Daniel Vetter authored
Two in one go: - it is allowed to call dma_fence_wait() while holding a dma_resv_lock(). This is fundamental to how eviction works with ttm, so required. - it is allowed to call dma_fence_wait() from memory reclaim contexts, specifically from shrinker callbacks (which i915 does), and from mmu notifier callbacks (which amdgpu does, and which i915 sometimes also does, and probably always should, but that's kinda a debate). Also for stuff like HMM we really need to be able to do this, or things get real dicey. Consequence is that any critical path necessary to get to a dma_fence_signal for a fence must never a) call dma_resv_lock nor b) allocate memory with GFP_KERNEL. Also by implication of dma_resv_lock(), no userspace faulting allowed. That's some supremely obnoxious limitations, which is why we need to sprinkle the right annotations to all relevant paths. The one big locking context we're leaving out here is mmu notifiers, added in commit 23b68395 Author: Daniel Vetter <daniel.vetter@ffwll.ch> Date: Mon Aug 26 22:14:21 2019 +0200 mm/mmu_notifiers: add a lockdep map for invalidate_range_start/end that one covers a lot of other callsites, and it's also allowed to wait on dma-fences from mmu notifiers. But there's no ready-made functions exposed to prime this, so I've left it out for now. v2: Also track against mmu notifier context. v3: kerneldoc to spec the cross-driver contract. Note that currently i915 throws in a hard-coded 10s timeout on foreign fences (not sure why that was done, but it's there), which is why that rule is worded with SHOULD instead of MUST. Also some of the mmu_notifier/shrinker rules might surprise SoC drivers, I haven't fully audited them all. Which is infeasible anyway, we'll need to run them with lockdep and dma-fence annotations and see what goes boom. v4: A spelling fix from Mika v5: #ifdef for CONFIG_MMU_NOTIFIER. Reported by 0day. Unfortunately this means lockdep enforcement is slightly inconsistent, it won't spot GFP_NOIO and GFP_NOFS allocations in the wrong spot if CONFIG_MMU_NOTIFIER is disabled in the kernel config. Oh well. v5: Note that only drivers/gpu has a reasonable (or at least historical) excuse to use dma_fence_wait() from shrinker and mmu notifier callbacks. Everyone else should either have a better memory manager model, or better hardware. This reflects discussions with Jason Gunthorpe. Cc: Jason Gunthorpe <jgg@mellanox.com> Cc: Felix Kuehling <Felix.Kuehling@amd.com> Cc: kernel test robot <lkp@intel.com> Acked-by:
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Daniel Vetter authored
Design is similar to the lockdep annotations for workers, but with some twists: - We use a read-lock for the execution/worker/completion side, so that this explicit annotation can be more liberally sprinkled around. With read locks lockdep isn't going to complain if the read-side isn't nested the same way under all circumstances, so ABBA deadlocks are ok. Which they are, since this is an annotation only. - We're using non-recursive lockdep read lock mode, since in recursive read lock mode lockdep does not catch read side hazards. And we _very_ much want read side hazards to be caught. For full details of this limitation see commit e9149858 Author: Peter Zijlstra <peterz@infradead.org> Date: Wed Aug 23 13:13:11 2017 +0200 locking/lockdep/selftests: Add mixed read-write ABBA tests - To allow nesting of the read-side explicit annotations we explicitly keep track of the nesting. lock_is_held() allows us to do that. - The wait-side annotation is a write lock, and entirely done within dma_fence_wait() for everyone by default. - To be able to freely annotate helper functions I want to make it ok to call dma_fence_begin/end_signalling from soft/hardirq context. First attempt was using the hardirq locking context for the write side in lockdep, but this forces all normal spinlocks nested within dma_fence_begin/end_signalling to be spinlocks. That bollocks. The approach now is to simple check in_atomic(), and for these cases entirely rely on the might_sleep() check in dma_fence_wait(). That will catch any wrong nesting against spinlocks from soft/hardirq contexts. The idea here is that every code path that's critical for eventually signalling a dma_fence should be annotated with dma_fence_begin/end_signalling. The annotation ideally starts right after a dma_fence is published (added to a dma_resv, exposed as a sync_file fd, attached to a drm_syncobj fd, or anything else that makes the dma_fence visible to other kernel threads), up to and including the dma_fence_wait(). Examples are irq handlers, the scheduler rt threads, the tail of execbuf (after the corresponding fences are visible), any workers that end up signalling dma_fences and really anything else. Not annotated should be code paths that only complete fences opportunistically as the gpu progresses, like e.g. shrinker/eviction code. The main class of deadlocks this is supposed to catch are: Thread A: mutex_lock(A); mutex_unlock(A); dma_fence_signal(); Thread B: mutex_lock(A); dma_fence_wait(); mutex_unlock(A); Thread B is blocked on A signalling the fence, but A never gets around to that because it cannot acquire the lock A. Note that dma_fence_wait() is allowed to be nested within dma_fence_begin/end_signalling sections. To allow this to happen the read lock needs to be upgraded to a write lock, which means that any other lock is acquired between the dma_fence_begin_signalling() call and the call to dma_fence_wait(), and still held, this will result in an immediate lockdep complaint. The only other option would be to not annotate such calls, defeating the point. Therefore these annotations cannot be sprinkled over the code entirely mindless to avoid false positives. Originally I hope that the cross-release lockdep extensions would alleviate the need for explicit annotations: https://lwn.net/Articles/709849/ But there's a few reasons why that's not an option: - It's not happening in upstream, since it got reverted due to too many false positives: commit e966eaee Author: Ingo Molnar <mingo@kernel.org> Date: Tue Dec 12 12:31:16 2017 +0100 locking/lockdep: Remove the cross-release locking checks This code (CONFIG_LOCKDEP_CROSSRELEASE=y and CONFIG_LOCKDEP_COMPLETIONS=y), while it found a number of old bugs initially, was also causing too many false positives that caused people to disable lockdep - which is arguably a worse overall outcome. - cross-release uses the complete() call to annotate the end of critical sections, for dma_fence that would be dma_fence_signal(). But we do not want all dma_fence_signal() calls to be treated as critical, since many are opportunistic cleanup of gpu requests. If these get stuck there's still the main completion interrupt and workers who can unblock everyone. Automatically annotating all dma_fence_signal() calls would hence cause false positives. - cross-release had some educated guesses for when a critical section starts, like fresh syscall or fresh work callback. This would again cause false positives without explicit annotations, since for dma_fence the critical sections only starts when we publish a fence. - Furthermore there can be cases where a thread never does a dma_fence_signal, but is still critical for reaching completion of fences. One example would be a scheduler kthread which picks up jobs and pushes them into hardware, where the interrupt handler or another completion thread calls dma_fence_signal(). But if the scheduler thread hangs, then all the fences hang, hence we need to manually annotate it. cross-release aimed to solve this by chaining cross-release dependencies, but the dependency from scheduler thread to the completion interrupt handler goes through hw where cross-release code can't observe it. In short, without manual annotations and careful review of the start and end of critical sections, cross-relese dependency tracking doesn't work. We need explicit annotations. v2: handle soft/hardirq ctx better against write side and dont forget EXPORT_SYMBOL, drivers can't use this otherwise. v3: Kerneldoc. v4: Some spelling fixes from Mika v5: Amend commit message to explain in detail why cross-release isn't the solution. v6: Pull out misplaced .rst hunk. Acked-by:
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Christian König authored
The helper doesn't expose any not-mapable memory resources. Signed-off-by:
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- 20 Jul, 2020 12 commits
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Alexander A. Klimov authored
Rationale: Reduces attack surface on kernel devs opening the links for MITM as HTTPS traffic is much harder to manipulate. Deterministic algorithm: For each file: If not .svg: For each line: If doesn't contain `\bxmlns\b`: For each link, `\bhttp://[^# \t\r\n]*(?:\w|/)`: If neither `\bgnu\.org/license`, nor `\bmozilla\.org/MPL\b`: If both the HTTP and HTTPS versions return 200 OK and serve the same content: Replace HTTP with HTTPS. Signed-off-by:Alexander A. Klimov <grandmaster@al2klimov.de> Signed-off-by:
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Alexander A. Klimov authored
Rationale: Reduces attack surface on kernel devs opening the links for MITM as HTTPS traffic is much harder to manipulate. Deterministic algorithm: For each file: If not .svg: For each line: If doesn't contain `\bxmlns\b`: For each link, `\bhttp://[^# \t\r\n]*(?:\w|/)`: If neither `\bgnu\.org/license`, nor `\bmozilla\.org/MPL\b`: If both the HTTP and HTTPS versions return 200 OK and serve the same content: Replace HTTP with HTTPS. Signed-off-by: -
Uwe Kleine-König authored
flags is unused since the driver was introduced in commit 45d59d70 ("drm: Add new driver for MXSFB controller"). Signed-off-by:
Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by:
Stefan Agner <stefan@agner.ch> Link: https://patchwork.freedesktop.org/patch/msgid/20200716174139.16602-1-u.kleine-koenig@pengutronix.de
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Guido Günther authored
In contrast to other display controllers on imx like DCSS and ipuv3 lcdif/mxsfb does not support detiling e.g. vivante tiled layouts. Since mesa might assume otherwise make it explicit that only DRM_FORMAT_MOD_LINEAR is supported. Signed-off-by:
Lucas Stach <l.stach@pengutronix.de> Signed-off-by:
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Suraj Upadhyay authored
Convert device logging with dev_* functions into drm_* functions. The patch has been generated with the coccinelle script below. The script focuses on instances of dev_* functions where the drm device context is clearly visible in its arguments. @@expression E1; expression list E2; @@ -dev_warn(E1->dev, E2) +drm_warn(E1, E2) @@expression E1; expression list E2; @@ -dev_info(E1->dev, E2) +drm_info(E1, E2) @@expression E1; expression list E2; @@ -dev_err(E1->dev, E2) +drm_err(E1, E2) @@expression E1; expression list E2; @@ -dev_info_once(E1->dev, E2) +drm_info_once(E1, E2) @@expression E1; expression list E2; @@ -dev_notice_once(E1->dev, E2) +drm_notice_once(E1, E2) @@expression E1; expression list E2; @@ -dev_warn_once(E1->dev, E2) +drm_warn_once(E1, E2) @@expression E1; expression list E2; @@ -dev_err_once(E1->dev, E2) +drm_err_once(E1, E2) @@expression E1; expression list E2; @@ -dev_err_ratelimited(E1->dev, E2) +drm_err_ratelimited(E1, E2) @@expression E1; expression list E2; @@ -dev_dbg(E1->dev, E2) +drm_dbg(E1, E2) Signed-off-by:
Suraj Upadhyay <usuraj35@gmail.com> Signed-off-by:
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Christophe JAILLET authored
The wrappers in include/linux/pci-dma-compat.h should go away. The patch has been generated with the coccinelle script below and has been hand modified to replace GFP_ with a correct flag. It has been compile tested. When memory is allocated in 'i810_dma_initialize()' GFP_KERNEL can be used because its only caller, 'i810_dma_init()', already use it and no lock is taken in the between. @@ @@ - PCI_DMA_BIDIRECTIONAL + DMA_BIDIRECTIONAL @@ @@ - PCI_DMA_TODEVICE + DMA_TO_DEVICE @@ @@ - PCI_DMA_FROMDEVICE + DMA_FROM_DEVICE @@ @@ - PCI_DMA_NONE + DMA_NONE @@ expression e1, e2, e3; @@ - pci_alloc_consistent(e1, e2, e3) + dma_alloc_coherent(&e1->dev, e2, e3, GFP_) @@ expression e1, e2, e3; @@ - pci_zalloc_consistent(e1, e2, e3) + dma_alloc_coherent(&e1->dev, e2, e3, GFP_) @@ expression e1, e2, e3, e4; @@ - pci_free_consistent(e1, e2, e3, e4) + dma_free_coherent(&e1->dev, e2, e3, e4) @@ expression e1, e2, e3, e4; @@ - pci_map_single(e1, e2, e3, e4) + dma_map_single(&e1->dev, e2, e3, e4) @@ expression e1, e2, e3, e4; @@ - pci_unmap_single(e1, e2, e3, e4) + dma_unmap_single(&e1->dev, e2, e3, e4) @@ expression e1, e2, e3, e4, e5; @@ - pci_map_page(e1, e2, e3, e4, e5) + dma_map_page(&e1->dev, e2, e3, e4, e5) @@ expression e1, e2, e3, e4; @@ - pci_unmap_page(e1, e2, e3, e4) + dma_unmap_page(&e1->dev, e2, e3, e4) @@ expression e1, e2, e3, e4; @@ - pci_map_sg(e1, e2, e3, e4) + dma_map_sg(&e1->dev, e2, e3, e4) @@ expression e1, e2, e3, e4; @@ - pci_unmap_sg(e1, e2, e3, e4) + dma_unmap_sg(&e1->dev, e2, e3, e4) @@ expression e1, e2, e3, e4; @@ - pci_dma_sync_single_for_cpu(e1, e2, e3, e4) + dma_sync_single_for_cpu(&e1->dev, e2, e3, e4) @@ expression e1, e2, e3, e4; @@ - pci_dma_sync_single_for_device(e1, e2, e3, e4) + dma_sync_single_for_device(&e1->dev, e2, e3, e4) @@ expression e1, e2, e3, e4; @@ - pci_dma_sync_sg_for_cpu(e1, e2, e3, e4) + dma_sync_sg_for_cpu(&e1->dev, e2, e3, e4) @@ expression e1, e2, e3, e4; @@ - pci_dma_sync_sg_for_device(e1, e2, e3, e4) + dma_sync_sg_for_device(&e1->dev, e2, e3, e4) @@ expression e1, e2; @@ - pci_dma_mapping_error(e1, e2) + dma_mapping_error(&e1->dev, e2) @@ expression e1, e2; @@ - pci_set_dma_mask(e1, e2) + dma_set_mask(&e1->dev, e2) @@ expression e1, e2; @@ - pci_set_consistent_dma_mask(e1, e2) + dma_set_coherent_mask(&e1->dev, e2) Signed-off-by:
Christophe JAILLET <christophe.jaillet@wanadoo.fr> Signed-off-by:
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Thomas Zimmermann authored
Cleaning up ast's MM code with ast_mm_fini() resets the write-combine flags on the VRAM I/O memory. Drop ast_mm_fini() in favor of an auto- release callback. Releasing the device also executes the callback. Signed-off-by:
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Thomas Zimmermann authored
Posting the GPU requires the correct DRAM type to be stored in struct ast_private. Therefore first initialize the DRAM info and then post the GPU. This restores the original order of instructions in this function. Signed-off-by:
Benjamin Herrenschmidt <benh@kernel.crashing.org> Fixes: bad09da6 ("drm/ast: Fixed vram size incorrect issue on POWER") Cc: Joel Stanley <joel@jms.id.au> Cc: Y.C. Chen <yc_chen@aspeedtech.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Dave Airlie <airlied@redhat.com> Cc: Thomas Zimmermann <tzimmermann@suse.de> Cc: Gerd Hoffmann <kraxel@redhat.com> Cc: Daniel Vetter <daniel.vetter@ffwll.ch> Cc: Sam Ravnborg <sam@ravnborg.org> Cc: Emil Velikov <emil.l.velikov@gmail.com> Cc: "Y.C. Chen" <yc_chen@aspeedtech.com> Cc: <stable@vger.kernel.org> # v4.11+ Link: https://patchwork.freedesktop.org/patch/msgid/20200716125353.31512-6-tzimmermann@suse.de
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Thomas Zimmermann authored
VRAM size detection is only relevant to the memory management. Move the code into ast_mm.c. While at it, rename the function to ast_get_vram_size(). The function argument's type is now struct ast_private. The result is stored in a local variable and not in struct ast_private any longer. Signed-off-by:
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Thomas Zimmermann authored
As a first step to managed MM code in ast, switch over VRAM MM helpers. v2: * updated to use drmm_vram_helper_init() Signed-off-by:
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Thomas Zimmermann authored
Although built upon TTM, the ast driver's VRAM MM helper does not expose TTM to its users. Rename the related ast file to ast_mm.c. Signed-off-by:
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Thomas Zimmermann authored
Calling drmm_vram_helper_init() sets up a managed instance of VRAM MM. Releasing the DRM device also frees the memory manager. The patch also updates the DRM documentation for VRAM helpers. The tutorial now describes the new managed interface. The old interfaces are deprecated and should not be used in new code. v2: * rename init function to drmm_vram_helper_init() * return errno code from init function; caller does not need vram_mm anyway * update documentation and remove docs for deprecated un-managed functions Signed-off-by:
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- 19 Jul, 2020 1 commit
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Paul Cercueil authored
Silence compiler warning about used but uninitialized 'ipu_state' variable. In practice, the variable would never be used when uninitialized, but the compiler cannot know that 'priv->ipu_plane' will always be NULL if CONFIG_INGENIC_IPU is disabled. Silence the warning by initializing the value to NULL. Signed-off-by:
Paul Cercueil <paul@crapouillou.net> Reviewed-by:
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- 16 Jul, 2020 2 commits
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Paul Cercueil authored
Bump version to 1.1 and set date to 2020-07-16. v3: New patch Signed-off-by:
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Paul Cercueil authored
Support multiple panels or bridges connected to the same DPI output of the SoC. This setup can be found for instance on the GCW Zero, where the same DPI output interfaces the internal 320x240 TFT panel, and the ITE IT6610 HDMI chip. v2: No change v3: Allow > 80-char lines where it makes sense Signed-off-by:
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