- 09 Apr, 2020 5 commits
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Dave Airlie authored
Merge tag 'drm-intel-next-fixes-2020-04-08' of git://anongit.freedesktop.org/drm/drm-intel into drm-next - Flush all the reloc_gpu batch (Chris) - Ignore readonly failures when updating relocs (Chris) - Fill all the unused space in the GGTT (Chris) - Return the right vswing table (Jose) - Don't enable DDI IO power on a TypeC port in TBT mode for ICL+ (Imre) Signed-off-by: Dave Airlie <airlied@redhat.com> From: Rodrigo Vivi <rodrigo.vivi@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20200408215952.GA1623934@intel.com
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Thomas Hellstrom (VMware) authored
With amdgpu and CONFIG_TRANSPARENT_HUGEPAGE_ALWAYS=y, there are errors like: BUG: non-zero pgtables_bytes on freeing mm and: BUG: Bad rss-counter state with TTM transparent huge-pages. Until we've figured out what other TTM drivers do differently compared to vmwgfx, disable the huge_fault() callback, eliminating transhuge page-table entries. Cc: Christian König <christian.koenig@amd.com> Signed-off-by: Thomas Hellstrom (VMware) <thomas_os@shipmail.org> Reported-by: Alex Xu (Hello71) <alex_y_xu@yahoo.ca> Tested-by: Alex Xu (Hello71) <alex_y_xu@yahoo.ca> Acked-by: Christian König <christian.koenig@amd.com> Signed-off-by: Dave Airlie <airlied@redhat.com> Link: https://patchwork.freedesktop.org/patch/msgid/20200409164925.11912-1-thomas_os@shipmail.org
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Dave Airlie authored
Merge tag 'drm-misc-next-fixes-2020-04-09' of git://anongit.freedesktop.org/drm/drm-misc into drm-next A few DMA-related fixes, an OOB fix for virtio and a probe-related fix for analogix_dp Signed-off-by: Dave Airlie <airlied@redhat.com> From: Maxime Ripard <maxime@cerno.tech> Link: https://patchwork.freedesktop.org/patch/msgid/20200409091424.cfpqqbqjxtkgnfme@gilmour.lan
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Marek Szyprowski authored
Analogix_dp driver acquires all its resources in the ->bind() callback, what is a bit against the component driver based approach, where the driver initialization is split into a probe(), where all resources are gathered, and a bind(), where all objects are created and a compound driver is initialized. Extract all the resource related operations to analogix_dp_probe() and analogix_dp_remove(), then call them before/after registration of the device components from the main Exynos DP and Rockchip DP drivers. Also move the plat_data initialization to the probe() to make it available for the analogix_dp_probe() function. This fixes the multiple calls to the bind() of the DRM compound driver when the DP PHY driver is not yet loaded/probed: [drm] Exynos DRM: using 14400000.fimd device for DMA mapping operations exynos-drm exynos-drm: bound 14400000.fimd (ops fimd_component_ops [exynosdrm]) exynos-drm exynos-drm: bound 14450000.mixer (ops mixer_component_ops [exynosdrm]) exynos-dp 145b0000.dp-controller: no DP phy configured exynos-drm exynos-drm: failed to bind 145b0000.dp-controller (ops exynos_dp_ops [exynosdrm]): -517 exynos-drm exynos-drm: master bind failed: -517 ... [drm] Exynos DRM: using 14400000.fimd device for DMA mapping operations exynos-drm exynos-drm: bound 14400000.fimd (ops hdmi_enable [exynosdrm]) exynos-drm exynos-drm: bound 14450000.mixer (ops hdmi_enable [exynosdrm]) exynos-drm exynos-drm: bound 145b0000.dp-controller (ops hdmi_enable [exynosdrm]) exynos-drm exynos-drm: bound 14530000.hdmi (ops hdmi_enable [exynosdrm]) [drm] Supports vblank timestamp caching Rev 2 (21.10.2013). Console: switching to colour frame buffer device 170x48 exynos-drm exynos-drm: fb0: exynosdrmfb frame buffer device [drm] Initialized exynos 1.1.0 20180330 for exynos-drm on minor 1 ... Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Acked-by: Andy Yan <andy.yan@rock-chips.com> Reviewed-by: Andrzej Hajda <a.hajda@samsung.com> Signed-off-by: Andrzej Hajda <a.hajda@samsung.com> Link: https://patchwork.freedesktop.org/patch/msgid/20200310103427.26048-1-m.szyprowski@samsung.com (cherry picked from commit 83a19677) Signed-off-by: Maxime Ripard <maxime@cerno.tech>
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Chris Wilson authored
drm_local_map.offset is not only used for resource_size_t but also dma_addr_t which may be of different sizes. Reported-by: Nathan Chancellor <natechancellor@gmail.com> Fixes: 8e4ff9b5 ("drm: Remove the dma_alloc_coherent wrapper for internal usage") Tested-by: Nathan Chancellor <natechancellor@gmail.com> # build Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Dave Airlie <airlied@gmail.com> Cc: Nathan Chancellor <natechancellor@gmail.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: https://patchwork.freedesktop.org/patch/msgid/20200402215926.30714-1-chris@chris-wilson.co.uk
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- 07 Apr, 2020 14 commits
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git://people.freedesktop.org/~agd5f/linuxDave Airlie authored
amd-drm-next-5.7-2020-04-01: amdgpu: - HDCP fixes - gfx10 fix - Misc display fixes - BACO fixes amdkfd: - Fix memory leak Signed-off-by: Dave Airlie <airlied@redhat.com> From: Alex Deucher <alexdeucher@gmail.com> Link: https://patchwork.freedesktop.org/patch/msgid/20200401194619.4217-1-alexander.deucher@amd.com
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git://github.com/skeggsb/linuxDave Airlie authored
A couple of misc fixes/workarounds for some issues that are causing a lot of pain for people. Of most interest are the PCI power management and GR init WARs, which effect a rather significant number of laptop systems that are in use today. Signed-off-by: Dave Airlie <airlied@redhat.com> From: Ben Skeggs <skeggsb@gmail.com> Link: https://patchwork.freedesktop.org/patch/msgid/ <CACAvsv5Ef5YKS9EPBH3YUubzvVr++_rzjgSqV_B5nC0L2kB6-Q@mail.gmail.com
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Dave Airlie authored
Merge tag 'drm-misc-next-fixes-2020-04-04' of git://anongit.freedesktop.org/drm/drm-misc into drm-next A bunch of fixes to avoid null pointer dereference in fbcon, fix a return in xen, some DT bindings fixes, a vc4 issue with 1920x1200 mode validation, and a conflicting framebuffer in vboxvideo. Signed-off-by: Dave Airlie <airlied@redhat.com> From: Maxime Ripard <maxime@cerno.tech> Link: https://patchwork.freedesktop.org/patch/msgid/20200404090057.a3m7uw6tavwtcyon@gilmour.lan
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Dave Airlie authored
Merge tag 'drm-intel-next-fixes-2020-04-02' of git://anongit.freedesktop.org/drm/drm-intel into drm-next Only gvt fixes on this round: - Fix non-privilege access warning (Tina) - Fix display port type (Tina) - BDW cmd parser missed SWTESS_BASE_ADDRESS (Yan) - Bypass length check of LRI (Yan) - Fix one klocwork warning (Tina) Signed-off-by: Dave Airlie <airlied@redhat.com> From: Rodrigo Vivi <rodrigo.vivi@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20200402213026.GA1141017@intel.com
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Ben Skeggs authored
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
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Ben Skeggs authored
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
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Ben Skeggs authored
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
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Ben Skeggs authored
Certain boards with GP107/GP108 chipsets hang (often, but randomly) for unknown reasons during GR initialisation. The first tell-tale symptom of this issue is: nouveau 0000:01:00.0: bus: MMIO read of 00000000 FAULT at 409800 [ TIMEOUT ] appearing in dmesg, likely followed by many other failures being logged. Karol found this WAR for the issue a while back, but efforts to isolate the root cause and proper fix have not yielded success so far. I've modified the original patch to include a few more details, limit it to GP107/GP108 by default, and added a config option to override this choice. Signed-off-by: Ben Skeggs <bskeggs@redhat.com> Reviewed-by: Karol Herbst <kherbst@redhat.com>
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Karol Herbst authored
Fixes the infamous 'runtime PM' bug many users are facing on Laptops with Nvidia Pascal GPUs by skipping said PCI power state changes on the GPU. Depending on the used kernel there might be messages like those in demsg: "nouveau 0000:01:00.0: Refused to change power state, currently in D3" "nouveau 0000:01:00.0: can't change power state from D3cold to D0 (config space inaccessible)" followed by backtraces of kernel crashes or timeouts within nouveau. It's still unkown why this issue exists, but this is a reliable workaround and solves a very annoying issue for user having to choose between a crashing kernel or higher power consumption of their Laptops. Signed-off-by: Karol Herbst <kherbst@redhat.com> Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: Lyude Paul <lyude@redhat.com> Cc: Rafael J. Wysocki <rjw@rjwysocki.net> Cc: Mika Westerberg <mika.westerberg@intel.com> Cc: linux-pci@vger.kernel.org Cc: linux-pm@vger.kernel.org Cc: dri-devel@lists.freedesktop.org Cc: nouveau@lists.freedesktop.org Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=205623Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
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Ralph Campbell authored
When nouveau processes GPU faults, it checks to see if the fault address falls within the "unmanaged" range which is reserved for fixed allocations instead of addresses chosen by the core mm code. If start is greater than or equal to svmm->unmanaged.limit, then limit will also be greater than svmm->unmanaged.limit which is greater than svmm->unmanaged.start and the start = max_t(u64, start, svmm->unmanaged.limit) will change nothing. Just remove the useless lines of code. Signed-off-by: Ralph Campbell <rcampbell@nvidia.com> Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
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Ralph Campbell authored
When migrating system memory to GPU memory, check that SVM has been enabled. Even though most errors can be ignored since migration is a performance optimization, return an error because this is a violation of the API. Signed-off-by: Ralph Campbell <rcampbell@nvidia.com> Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
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Ralph Campbell authored
find_vma_intersection(mm, start, end) only guarantees that end is greater than or equal to vma->vm_start but doesn't guarantee that start is greater than or equal to vma->vm_start. The calculation for the intersecting range in nouveau_svmm_bind() isn't accounting for this and can call migrate_vma_setup() with a starting address less than vma->vm_start. This results in migrate_vma_setup() returning -EINVAL for the range instead of nouveau skipping that part of the range and migrating the rest. Signed-off-by: Ralph Campbell <rcampbell@nvidia.com> Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
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Wambui Karuga authored
As there is no need to check for the return value of debugfs_create_file and drm_debugfs_create_files, remove unnecessary checks and error handling in nouveau_drm_debugfs_init. Signed-off-by: Wambui Karuga <wambui.karugax@gmail.com> Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
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Ben Skeggs authored
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
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- 06 Apr, 2020 6 commits
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Chris Wilson authored
__i915_gem_object_flush_map() takes a byte range, so feed it the written bytes and do not mistake the u32 index as bytes! Fixes: a679f58d ("drm/i915: Flush pages on acquisition") Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Matthew Auld <matthew.william.auld@gmail.com> Cc: <stable@vger.kernel.org> # v5.2+ Reviewed-by: Matthew Auld <matthew.william.auld@gmail.com> Link: https://patchwork.freedesktop.org/patch/msgid/20200406114821.10949-1-chris@chris-wilson.co.uk (cherry picked from commit 30c88a47) Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
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Chris Wilson authored
If the user passes in a readonly reloc[], by the time we notice we have already committed to modifying the execobjects, or have indeed done so already. Reporting the failure just compounds the issue as we have no second pass to fall back to anymore. "Be damned if you do, and damned if you don't." Testcase: igt/gem_exec_reloc/readonly Fixes: 7dc8f114 ("drm/i915/gem: Drop relocation slowpath") References: fddcd00a ("drm/i915: Force the slow path after a user-write error") Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Matthew Auld <matthew.auld@intel.com> Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Reviewed-by: Andi Shyti <andi.shyti@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20200331162150.3635-1-chris@chris-wilson.co.uk (cherry picked from commit 97a37c91) Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
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Chris Wilson authored
When we allocate space in the GGTT we may have to allocate a larger region than will be populated by the object to accommodate fencing. Make sure that this space beyond the end of the buffer points safely into scratch space, in case the HW tries to access it anyway (e.g. fenced access to the last tile row). v2: Preemptively / conservatively guard gen6 ggtt as well. Reported-by: Imre Deak <imre.deak@intel.com> References: https://gitlab.freedesktop.org/drm/intel/-/issues/1554Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Matthew Auld <matthew.auld@intel.com> Cc: Imre Deak <imre.deak@intel.com> Cc: stable@vger.kernel.org Reviewed-by: Matthew Auld <matthew.auld@intel.com> Reviewed-by: Imre Deak <imre.deak@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20200331152348.26946-1-chris@chris-wilson.co.uk (cherry picked from commit 4d6c1859) Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
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José Roberto de Souza authored
DDI ports have its encoders initialized with INTEL_OUTPUT_DDI type and later eDP ports that have the type changed to INTEL_OUTPUT_EDP. But for all other DDI ports it can drive HDMI or DP depending on what user connects to the ports. ehl_get_combo_buf_trans() and tgl_get_combo_buf_trans() was checking for INTEL_OUTPUT_DP that was never true, causing wrong vswing tables being used. So here replacing the INTEL_OUTPUT_DP checks by the valid output types that this functions receives as parameters. HDMI cases will be correctly handled as it do not use encoder->type, instead it calls the functions with INTEL_OUTPUT_HDMI as type parameter and HDMI don't have retraining. v2: changed INTEL_OUTPUT_DDI to INTEL_OUTPUT_EDP and INTEL_OUTPUT_HDMI Fixes: bd3cf6f7 ("drm/i915/dp/tgl+: Update combo phy vswing tables") Cc: Clinton A Taylor <clinton.a.taylor@intel.com> Cc: Matt Roper <matthew.d.roper@intel.com> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Signed-off-by: José Roberto de Souza <jose.souza@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20200330210044.130510-1-jose.souza@intel.com (cherry picked from commit 70988115) Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
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Imre Deak authored
The DDI IO power well must not be enabled for a TypeC port in TBT mode, ensure this during driver loading/system resume. This gets rid of error messages like [drm] *ERROR* power well DDI E TC2 IO state mismatch (refcount 1/enabled 0) and avoids leaking the power ref when disabling the output. Cc: <stable@vger.kernel.org> # v5.4+ Signed-off-by: Imre Deak <imre.deak@intel.com> Reviewed-by: José Roberto de Souza <jose.souza@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20200330152244.11316-1-imre.deak@intel.com (cherry picked from commit f77a2db2) Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
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Jiri Slaby authored
After commit f651c8b0 ("drm/virtio: factor out the sg_table from virtio_gpu_object"), virtio_gpu_create_object allocates too small space to fit everything in. It is because it allocates struct virtio_gpu_object, but should allocate a newly added struct virtio_gpu_object_shmem which has 2 more members. So fix that by using correct type in virtio_gpu_create_object. Signed-off-by: Jiri Slaby <jslaby@suse.cz> Link: http://patchwork.freedesktop.org/patch/msgid/20200319100421.16267-1-jslaby@suse.cz Fixes: f651c8b0 ("drm/virtio: factor out the sg_table from virtio_gpu_object") Cc: Gurchetan Singh <gurchetansingh@chromium.org> Cc: Gerd Hoffmann <kraxel@redhat.com> Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> (cherry picked from commit 0666a8d7)
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- 05 Apr, 2020 1 commit
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Marek Szyprowski authored
Scatterlist elements contains both pages and DMA addresses, but one should not assume 1:1 relation between them. The sg->length is the size of the physical memory chunk described by the sg->page, while sg_dma_len(sg) is the size of the DMA (IO virtual) chunk described by the sg_dma_address(sg). The proper way of extracting both: pages and DMA addresses of the whole buffer described by a scatterlist it to iterate independently over the sg->pages/sg->length and sg_dma_address(sg)/sg_dma_len(sg) entries. Fixes: 42e67b47 ("drm/prime: use dma length macro when mapping sg") Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> Link: https://patchwork.freedesktop.org/patch/msgid/20200327162126.29705-1-m.szyprowski@samsung.com Cc: stable@vger.kernel.org
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- 04 Apr, 2020 1 commit
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Maxime Ripard authored
Alex needs v5.6 into drm-misc-next-fixes to merge a fix for a regression in the scatterlist processing in PRIME. Signed-off-by: Maxime Ripard <maxime@cerno.tech>
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- 02 Apr, 2020 1 commit
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git://people.freedesktop.org/~thomash/linuxDave Airlie authored
Huge page-table entries for TTM In order to reduce CPU usage [1] and in theory TLB misses this patchset enables huge- and giant page-table entries for TTM and TTM-enabled graphics drivers. Signed-off-by: Dave Airlie <airlied@redhat.com> From: Thomas Hellstrom (VMware) <thomas_os@shipmail.org> Link: https://patchwork.freedesktop.org/patch/msgid/20200325073102.6129-1-thomas_os@shipmail.org
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- 01 Apr, 2020 1 commit
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Jack Zhang authored
Originally, it kfrees the wrong pointer for mem_obj. It would cause memory leak under stress test. Signed-off-by: Jack Zhang <Jack.Zhang1@amd.com> Acked-by: Nirmoy Das <nirmoy.das@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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- 31 Mar, 2020 11 commits
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Bhawanpreet Lakha authored
[Why] Some displays have an issue where the hdcp chips are initialized after the display has already lit up. This means we can sometimes authentication too early and cause authentication failures. This happens when HDCP is enabled and the display is power cycled. Normally we will authenticate 2 seconds after the display is lit, but some displays need a bit more time. [How] Increase delay to 3 second before we start authentication. Signed-off-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com> Reviewed-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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Bhawanpreet Lakha authored
[Why] -We need to cancel future callbacks/watchdogs events when a callback/watchdog event happens [How] -fix typo in event_callback() -cancel callback, not watchdog -cancel watchdog events in event_watchdog_timer(). Signed-off-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com> Reviewed-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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Bhawanpreet Lakha authored
[Why] When content type property is set to 1. We should enable hdcp2.2 and if we cant then stop. Currently the way it works in DC is that if we fail hdcp2, we will try hdcp1 after. [How] Use link config to force disable hdcp1.4 when type1 is set. Signed-off-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com> Reviewed-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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Evan Quan authored
This is ASIC specific and should be placed in _ppt.c of each ASIC. Signed-off-by: Evan Quan <evan.quan@amd.com> Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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Evan Quan authored
This is already done in soc15.c. And this is really ASIC specific and should not be placed here. Signed-off-by: Evan Quan <evan.quan@amd.com> Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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Dmytro Laktyushkin authored
[Why] DML expects num_states to exclude the duplicate state. [How] Set num_states to correct value to prevent array off-by-one error. Also refactor max clock level code for diags. Signed-off-by: Dmytro Laktyushkin <Dmytro.Laktyushkin@amd.com> Signed-off-by: George Shen <george.shen@amd.com> Reviewed-by: Dmytro Laktyushkin <Dmytro.Laktyushkin@amd.com> Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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Stylon Wang authored
[Why] BT2020 is not supported in COLOR_ENCODING property of planes. Only BT601 and BT709 was available. [How] Allow BT2020 as legit value in setting COLOR_ENCODING property. Signed-off-by: Stylon Wang <stylon.wang@amd.com> Reviewed-by: Nicholas Kazlauskas <Nicholas.Kazlauskas@amd.com> Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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Aric Cyr authored
[Why] Nominal pixel clock and EDID information differ in precision so although monitor reports maximum refresh is 2x minimum, LFC was not being enabled. [How] Use minimum refresh rate as nominal/2 when EDID dictates that min refresh = max refresh/2. v2: squash in 64 bit divide fix Signed-off-by: Aric Cyr <aric.cyr@amd.com> Reviewed-by: Nicholas Kazlauskas <Nicholas.Kazlauskas@amd.com> Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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Stylon Wang authored
[Why] CTM was only supported at CRTC level and we need color space conversion in linear space at plane level. [How] - Add plane-level CTM to dc interface - Program plane-level CTM in DCN Signed-off-by: Stylon Wang <stylon.wang@amd.com> Reviewed-by: Nicholas Kazlauskas <Nicholas.Kazlauskas@amd.com> Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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Isabel Zhang authored
[Why] Change is causing a regression where the OPC app no longer functions properly. [How] Revert the changelist causing the issue. Signed-off-by: Isabel Zhang <isabel.zhang@amd.com> Reviewed-by: Yongqiang Sun <yongqiang.sun@amd.com> Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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Yongqiang Sun authored
[Why] In some scenario like 1366x768 VSR enabled connected with a 4K monitor and playing 4K video in clone mode, underflow will be observed due to decrease dppclk when previouse surface scan isn't finished [How] In this use case, surface flip is switching between 4K and 1366x768, 1366x768 needs smaller dppclk, and when decrease the clk and previous surface scan is for 4K and scan isn't done, underflow will happen. Not doing optimize bandwidth in case of flip pending. Signed-off-by: Yongqiang Sun <yongqiang.sun@amd.com> Reviewed-by: Tony Cheng <Tony.Cheng@amd.com> Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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