dri-devel September 2021

dri-devel@lists.freedesktop.org

348 participants
817 discussions

[PATCH] drm/i915: zero fill vma name buffer
by Tim Gardner 17 Sep '21

17 Sep '21

In capture_vma() Coverity complains of a possible buffer overrun. Even though this is a static function where all call sites can be checked, limiting the copy length could save some future grief. CID 93300 (#1 of 1): Copy into fixed size buffer (STRING_OVERFLOW) 4. fixed_size_dest: You might overrun the 16-character fixed-size string c->name by copying name without checking the length. 5. parameter_as_source: Note: This defect has an elevated risk because the source argument is a parameter of the current function. 1326 strcpy(c->name, name); Fix any possible overflows by using strncpy(). Zero fill the name buffer to guarantee ASCII string NULL termination. Cc: Jani Nikula <jani.nikula(a)linux.intel.com> Cc: Joonas Lahtinen <joonas.lahtinen(a)linux.intel.com> Cc: Rodrigo Vivi <rodrigo.vivi(a)intel.com> Cc: David Airlie <airlied(a)linux.ie> Cc: Daniel Vetter <daniel(a)ffwll.ch> Cc: intel-gfx(a)lists.freedesktop.org Cc: dri-devel(a)lists.freedesktop.org Cc: linux-kernel(a)vger.kernel.org Signed-off-by: Tim Gardner <tim.gardner(a)canonical.com> --- drivers/gpu/drm/i915/i915_gpu_error.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_gpu_error.c b/drivers/gpu/drm/i915/i915_gpu_error.c index 9cf6ac575de1..154df174e2d7 100644 --- a/drivers/gpu/drm/i915/i915_gpu_error.c +++ b/drivers/gpu/drm/i915/i915_gpu_error.c @@ -1297,10 +1297,11 @@ static bool record_context(struct i915_gem_context_coredump *e, return simulated; } +#define VMA_NAME_LEN 16 struct intel_engine_capture_vma { struct intel_engine_capture_vma *next; struct i915_vma *vma; - char name[16]; + char name[VMA_NAME_LEN]; }; static struct intel_engine_capture_vma * @@ -1314,7 +1315,7 @@ capture_vma(struct intel_engine_capture_vma *next, if (!vma) return next; - c = kmalloc(sizeof(*c), gfp); + c = kzalloc(sizeof(*c), gfp); if (!c) return next; @@ -1323,7 +1324,7 @@ capture_vma(struct intel_engine_capture_vma *next, return next; } - strcpy(c->name, name); + strncpy(c->name, name, VMA_NAME_LEN-1); c->vma = vma; /* reference held while active */ c->next = next; -- 2.33.0

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linux-next: build failure after merge of the drm-misc tree
by Stephen Rothwell 17 Sep '21

17 Sep '21

Hi all, After merging the drm-misc tree, today's linux-next build (x86_64 modules_install) failed like this: depmod: ERROR: Cycle detected: drm_kms_helper -> drm -> drm_kms_helper depmod: ERROR: Cycle detected: cec depmod: ERROR: Found 2 modules in dependency cycles! Caused by commit 87ea95808d53 ("drm/bridge: Add a function to abstract away panels") I have reverted these commits for today: a43dd76bacd0 ("drm/vc4: dsi: Switch to devm_drm_of_get_bridge") 0caddbbfdfa2 ("drm/vc4: dpi: Switch to devm_drm_of_get_bridge") 87ea95808d53 ("drm/bridge: Add a function to abstract away panels") -- Cheers, Stephen Rothwell

1 0

[PATCH 1/4] fbdev: omapfb: panel-lgphilips-lb035q02: Make use of the helper function dev_err_probe()
by Cai Huoqing 17 Sep '21

17 Sep '21

When possible use dev_err_probe help to properly deal with the PROBE_DEFER error, the benefit is that DEFER issue will be logged in the devices_deferred debugfs file. Using dev_err_probe() can reduce code size, and the error value gets printed. Signed-off-by: Cai Huoqing <caihuoqing(a)baidu.com> --- .../fbdev/omap2/omapfb/displays/panel-lgphilips-lb035q02.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) diff --git a/drivers/video/fbdev/omap2/omapfb/displays/panel-lgphilips-lb035q02.c b/drivers/video/fbdev/omap2/omapfb/displays/panel-lgphilips-lb035q02.c index 1bec7a4422e8..6befd22dbd5c 100644 --- a/drivers/video/fbdev/omap2/omapfb/displays/panel-lgphilips-lb035q02.c +++ b/drivers/video/fbdev/omap2/omapfb/displays/panel-lgphilips-lb035q02.c @@ -244,10 +244,9 @@ static int lb035q02_probe_of(struct spi_device *spi) struct gpio_desc *gpio; gpio = devm_gpiod_get(&spi->dev, "enable", GPIOD_OUT_LOW); - if (IS_ERR(gpio)) { - dev_err(&spi->dev, "failed to parse enable gpio\n"); - return PTR_ERR(gpio); - } + if (IS_ERR(gpio)) + return dev_err_probe(&spi->dev, PTR_ERR(gpio), + "failed to parse enable gpio\n"); ddata->enable_gpio = gpio; -- 2.25.1

1 3

[PATCH 1/6] fbdev: da8xx-fb: Make use of the helper function dev_err_probe()
by Cai Huoqing 17 Sep '21

17 Sep '21

When possible use dev_err_probe help to properly deal with the PROBE_DEFER error, the benefit is that DEFER issue will be logged in the devices_deferred debugfs file. Using dev_err_probe() can reduce code size, and the error value gets printed. Signed-off-by: Cai Huoqing <caihuoqing(a)baidu.com> --- drivers/video/fbdev/da8xx-fb.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) diff --git a/drivers/video/fbdev/da8xx-fb.c b/drivers/video/fbdev/da8xx-fb.c index 005ac3c17aa1..ae76a2111c77 100644 --- a/drivers/video/fbdev/da8xx-fb.c +++ b/drivers/video/fbdev/da8xx-fb.c @@ -1354,10 +1354,9 @@ static int fb_probe(struct platform_device *device) return PTR_ERR(da8xx_fb_reg_base); tmp_lcdc_clk = devm_clk_get(&device->dev, "fck"); - if (IS_ERR(tmp_lcdc_clk)) { - dev_err(&device->dev, "Can not get device clock\n"); - return PTR_ERR(tmp_lcdc_clk); - } + if (IS_ERR(tmp_lcdc_clk)) + return dev_err_probe(&device->dev, PTR_ERR(tmp_lcdc_clk), + "Can not get device clock\n"); pm_runtime_enable(&device->dev); pm_runtime_get_sync(&device->dev); -- 2.25.1

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[PATCH AUTOSEL 5.14 06/21] drm/amdgpu: fix fdinfo race with process exit
by Sasha Levin 17 Sep '21

17 Sep '21

From: Philip Yang <Philip.Yang(a)amd.com> [ Upstream commit d7eff46c214c036606dd3cd305bd5a128aecfe8c ] Get process vm root BO ref in case process is exiting and root BO is freed, to avoid NULL pointer dereference backtrace: BUG: unable to handle kernel NULL pointer dereference at 0000000000000000 Call Trace: amdgpu_show_fdinfo+0xfe/0x2a0 [amdgpu] seq_show+0x12c/0x180 seq_read+0x153/0x410 vfs_read+0x91/0x140[ 3427.206183] ksys_read+0x4f/0xb0 do_syscall_64+0x5b/0x1a0 entry_SYSCALL_64_after_hwframe+0x65/0xca Signed-off-by: Philip Yang <Philip.Yang(a)amd.com> Reviewed-by: Felix Kuehling <Felix.Kuehling(a)amd.com> Signed-off-by: Alex Deucher <alexander.deucher(a)amd.com> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- drivers/gpu/drm/amd/amdgpu/amdgpu_fdinfo.c | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_fdinfo.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_fdinfo.c index d94c5419ec25..5a6857c44bb6 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_fdinfo.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_fdinfo.c @@ -59,6 +59,7 @@ void amdgpu_show_fdinfo(struct seq_file *m, struct file *f) uint64_t vram_mem = 0, gtt_mem = 0, cpu_mem = 0; struct drm_file *file = f->private_data; struct amdgpu_device *adev = drm_to_adev(file->minor->dev); + struct amdgpu_bo *root; int ret; ret = amdgpu_file_to_fpriv(f, &fpriv); @@ -69,13 +70,19 @@ void amdgpu_show_fdinfo(struct seq_file *m, struct file *f) dev = PCI_SLOT(adev->pdev->devfn); fn = PCI_FUNC(adev->pdev->devfn); - ret = amdgpu_bo_reserve(fpriv->vm.root.bo, false); + root = amdgpu_bo_ref(fpriv->vm.root.bo); + if (!root) + return; + + ret = amdgpu_bo_reserve(root, false); if (ret) { DRM_ERROR("Fail to reserve bo\n"); return; } amdgpu_vm_get_memory(&fpriv->vm, &vram_mem, &gtt_mem, &cpu_mem); - amdgpu_bo_unreserve(fpriv->vm.root.bo); + amdgpu_bo_unreserve(root); + amdgpu_bo_unref(&root); + seq_printf(m, "pdev:\t%04x:%02x:%02x.%d\npasid:\t%u\n", domain, bus, dev, fn, fpriv->vm.pasid); seq_printf(m, "vram mem:\t%llu kB\n", vram_mem/1024UL); -- 2.30.2

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[PATCH AUTOSEL 5.14 05/21] drm/amd/display: Fix memory leak reported by coverity
by Sasha Levin 17 Sep '21

17 Sep '21

From: Anson Jacob <Anson.Jacob(a)amd.com> [ Upstream commit 03388a347fe7cf7c3bdf68b0823ba316d177d470 ] Free memory allocated if any of the previous allocations failed. >>> CID 1487129: Resource leaks (RESOURCE_LEAK) >>> Variable "vpg" going out of scope leaks the storage it points to. Addresses-Coverity-ID: 1487129: ("Resource leaks") Reviewed-by: Aric Cyr <aric.cyr(a)amd.com> Acked-by: Mikita Lipski <mikita.lipski(a)amd.com> Signed-off-by: Anson Jacob <Anson.Jacob(a)amd.com> Signed-off-by: Alex Deucher <alexander.deucher(a)amd.com> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- drivers/gpu/drm/amd/display/dc/dcn303/dcn303_resource.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/display/dc/dcn303/dcn303_resource.c b/drivers/gpu/drm/amd/display/dc/dcn303/dcn303_resource.c index dc7823d23ba8..dd38796ba30a 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn303/dcn303_resource.c +++ b/drivers/gpu/drm/amd/display/dc/dcn303/dcn303_resource.c @@ -510,8 +510,12 @@ static struct stream_encoder *dcn303_stream_encoder_create(enum engine_id eng_id vpg = dcn303_vpg_create(ctx, vpg_inst); afmt = dcn303_afmt_create(ctx, afmt_inst); - if (!enc1 || !vpg || !afmt) + if (!enc1 || !vpg || !afmt) { + kfree(enc1); + kfree(vpg); + kfree(afmt); return NULL; + } dcn30_dio_stream_encoder_construct(enc1, ctx, ctx->dc_bios, eng_id, vpg, afmt, &stream_enc_regs[eng_id], &se_shift, &se_mask); -- 2.30.2

1 0

[PATCH AUTOSEL 5.14 04/21] drm/amdgpu: Fixes to returning VBIOS RAS EEPROM address
by Sasha Levin 17 Sep '21

17 Sep '21

From: Luben Tuikov <luben.tuikov(a)amd.com> [ Upstream commit a6a355a22f7a0efa6a11bc90b5161f394d51fe95 ] 1) Generalize the function--if the user didn't set i2c_address, still return true/false to indicate whether VBIOS contains the RAS EEPROM address. This function shouldn't evaluate whether the user set the i2c_address pointer or not. 2) Don't touch the caller's i2c_address, unless you have to--this function shouldn't have side effects. 3) Correctly set the function comment as a kernel-doc comment. Cc: John Clements <john.clements(a)amd.com> Cc: Hawking Zhang <Hawking.Zhang(a)amd.com> Cc: Alex Deucher <Alexander.Deucher(a)amd.com> Signed-off-by: Luben Tuikov <luben.tuikov(a)amd.com> Reviewed-by: Alex Deucher <Alexander.Deucher(a)amd.com> Signed-off-by: Alex Deucher <alexander.deucher(a)amd.com> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- .../gpu/drm/amd/amdgpu/amdgpu_atomfirmware.c | 50 ++++++++++++------- 1 file changed, 33 insertions(+), 17 deletions(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.c index 8f53837d4d3e..97178b307ed6 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.c @@ -468,14 +468,18 @@ bool amdgpu_atomfirmware_dynamic_boot_config_supported(struct amdgpu_device *ade return (fw_cap & ATOM_FIRMWARE_CAP_DYNAMIC_BOOT_CFG_ENABLE) ? true : false; } -/* - * Helper function to query RAS EEPROM address - * - * @adev: amdgpu_device pointer +/** + * amdgpu_atomfirmware_ras_rom_addr -- Get the RAS EEPROM addr from VBIOS + * adev: amdgpu_device pointer + * i2c_address: pointer to u8; if not NULL, will contain + * the RAS EEPROM address if the function returns true * - * Return true if vbios supports ras rom address reporting + * Return true if VBIOS supports RAS EEPROM address reporting, + * else return false. If true and @i2c_address is not NULL, + * will contain the RAS ROM address. */ -bool amdgpu_atomfirmware_ras_rom_addr(struct amdgpu_device *adev, uint8_t* i2c_address) +bool amdgpu_atomfirmware_ras_rom_addr(struct amdgpu_device *adev, + u8 *i2c_address) { struct amdgpu_mode_info *mode_info = &adev->mode_info; int index; @@ -483,27 +487,39 @@ bool amdgpu_atomfirmware_ras_rom_addr(struct amdgpu_device *adev, uint8_t* i2c_a union firmware_info *firmware_info; u8 frev, crev; - if (i2c_address == NULL) - return false; - - *i2c_address = 0; - index = get_index_into_master_table(atom_master_list_of_data_tables_v2_1, - firmwareinfo); + firmwareinfo); if (amdgpu_atom_parse_data_header(adev->mode_info.atom_context, - index, &size, &frev, &crev, &data_offset)) { + index, &size, &frev, &crev, + &data_offset)) { /* support firmware_info 3.4 + */ if ((frev == 3 && crev >=4) || (frev > 3)) { firmware_info = (union firmware_info *) (mode_info->atom_context->bios + data_offset); - *i2c_address = firmware_info->v34.ras_rom_i2c_slave_addr; + /* The ras_rom_i2c_slave_addr should ideally + * be a 19-bit EEPROM address, which would be + * used as is by the driver; see top of + * amdgpu_eeprom.c. + * + * When this is the case, 0 is of course a + * valid RAS EEPROM address, in which case, + * we'll drop the first "if (firm...)" and only + * leave the check for the pointer. + * + * The reason this works right now is because + * ras_rom_i2c_slave_addr contains the EEPROM + * device type qualifier 1010b in the top 4 + * bits. + */ + if (firmware_info->v34.ras_rom_i2c_slave_addr) { + if (i2c_address) + *i2c_address = firmware_info->v34.ras_rom_i2c_slave_addr; + return true; + } } } - if (*i2c_address != 0) - return true; - return false; } -- 2.30.2

1 0

[PATCH v2] drm/tegra: sor: Make use of the helper function dev_err_probe()
by Cai Huoqing 17 Sep '21

17 Sep '21

When possible use dev_err_probe help to properly deal with the PROBE_DEFER error, the benefit is that DEFER issue will be logged in the devices_deferred debugfs file. And using dev_err_probe() can reduce code size, the error value gets printed. Reported-by: kernel test robot <lkp(a)intel.com> Signed-off-by: Cai Huoqing <caihuoqing(a)baidu.com> --- v1->v2: Fix compile error-add ';' drivers/gpu/drm/tegra/sor.c | 24 +++++++++--------------- 1 file changed, 9 insertions(+), 15 deletions(-) diff --git a/drivers/gpu/drm/tegra/sor.c b/drivers/gpu/drm/tegra/sor.c index 0ea320c1092b..d7964e498da9 100644 --- a/drivers/gpu/drm/tegra/sor.c +++ b/drivers/gpu/drm/tegra/sor.c @@ -2964,11 +2964,9 @@ static int tegra_sor_hdmi_probe(struct tegra_sor *sor) int err; sor->avdd_io_supply = devm_regulator_get(sor->dev, "avdd-io-hdmi-dp"); - if (IS_ERR(sor->avdd_io_supply)) { - dev_err(sor->dev, "cannot get AVDD I/O supply: %ld\n", - PTR_ERR(sor->avdd_io_supply)); - return PTR_ERR(sor->avdd_io_supply); - } + if (IS_ERR(sor->avdd_io_supply)) + return dev_err_probe(sor->dev, PTR_ERR(sor->avdd_io_supply), + "cannot get AVDD I/O supply\n"); err = tegra_sor_enable_regulator(sor, sor->avdd_io_supply); if (err < 0) { @@ -2978,11 +2976,9 @@ static int tegra_sor_hdmi_probe(struct tegra_sor *sor) } sor->vdd_pll_supply = devm_regulator_get(sor->dev, "vdd-hdmi-dp-pll"); - if (IS_ERR(sor->vdd_pll_supply)) { - dev_err(sor->dev, "cannot get VDD PLL supply: %ld\n", - PTR_ERR(sor->vdd_pll_supply)); - return PTR_ERR(sor->vdd_pll_supply); - } + if (IS_ERR(sor->vdd_pll_supply)) + return dev_err_probe(sor->dev, PTR_ERR(sor->vdd_pll_supply), + "cannot get VDD PLL supply\n"); err = tegra_sor_enable_regulator(sor, sor->vdd_pll_supply); if (err < 0) { @@ -2992,11 +2988,9 @@ static int tegra_sor_hdmi_probe(struct tegra_sor *sor) } sor->hdmi_supply = devm_regulator_get(sor->dev, "hdmi"); - if (IS_ERR(sor->hdmi_supply)) { - dev_err(sor->dev, "cannot get HDMI supply: %ld\n", - PTR_ERR(sor->hdmi_supply)); - return PTR_ERR(sor->hdmi_supply); - } + if (IS_ERR(sor->hdmi_supply)) + return dev_err_probe(sor->dev, PTR_ERR(sor->hdmi_supply), + "cannot get HDMI supply\n"); err = tegra_sor_enable_regulator(sor, sor->hdmi_supply); if (err < 0) { -- 2.25.1

1 0

[PATCH v2 00/23] Fix some issues at documentation
by Mauro Carvalho Chehab 17 Sep '21

17 Sep '21

Hi John, Please ignore the previous series I sent today [1]. I forgot that I had already submitted a first version of this series. [1] https://lore.kernel.org/all/cover.1631783482.git.mchehab+huawei@kernel.org/ The first patch in this series fix a bad character used instead of a "(c)" UTF-8 symbol. The remaining ones fix several broken references to files under Documentation/, several due to DT schema conversions from .txt to .yaml. --- v2: - Added a couple of extra fixes; - merged two patches touching mtd-physmap.yaml; - added missing tags (acked-by/reviewed-by) received after v1. v1: https://lore.kernel.org/all/cover.1626947923.git.mchehab+huawei@kernel.org/ Mauro Carvalho Chehab (23): visorbus: fix a copyright symbol that was bad encoded dt-bindings: net: dsa: sja1105: update nxp,sja1105.yaml reference dt-bindings: arm: mediatek: mmsys: update mediatek,mmsys.yaml reference dt-bindings: w1: update w1-gpio.yaml reference dt-bindings: mmc: update mmc-card.yaml reference libbpf: update index.rst reference docs: accounting: update delay-accounting.rst reference tools: bpftool: update bpftool-prog.rst reference tools: bpftool: update bpftool-map.rst reference bpftool: update bpftool-cgroup.rst reference MAINTAINERS: update arm,vic.yaml reference MAINTAINERS: update aspeed,i2c.yaml reference MAINTAINERS: update faraday,ftrtc010.yaml reference MAINTAINERS: update fsl,fec.yaml reference MAINTAINERS: update ti,sci.yaml reference MAINTAINERS: update intel,ixp46x-rng.yaml reference MAINTAINERS: update nxp,imx8-jpeg.yaml reference MAINTAINERS: update gemini.yaml reference MAINTAINERS: update brcm,unimac-mdio.yaml reference MAINTAINERS: update chipone,icn8318.yaml reference MAINTAINERS: update silergy,sy8106a.yaml reference MAINTAINERS: update mtd-physmap.yaml reference MAINTAINERS: update ti,am654-hbmc.yaml reference Documentation/admin-guide/sysctl/kernel.rst | 2 +- Documentation/bpf/index.rst | 2 +- .../display/mediatek/mediatek,disp.txt | 2 +- Documentation/networking/dsa/sja1105.rst | 2 +- Documentation/w1/masters/w1-gpio.rst | 2 +- MAINTAINERS | 28 +++++++++---------- drivers/mmc/host/omap_hsmmc.c | 2 +- drivers/visorbus/visorbus_main.c | 2 +- .../selftests/bpf/test_bpftool_synctypes.py | 6 ++-- 9 files changed, 24 insertions(+), 24 deletions(-) -- 2.31.1

2 2

[PATCH v1 00/12] Context types
by Gurchetan Singh 17 Sep '21

17 Sep '21

Version 1 of context types: https://lists.oasis-open.org/archives/virtio-dev/202108/msg00141.html Changes since RFC: * le32 info --> {u8 ring_idx + u8 padding[3]). * Max rings is now 64. Anthoine Bourgeois (2): drm/virtio: implement context init: probe for feature drm/virtio: implement context init: support init ioctl Gurchetan Singh (10): virtio-gpu api: multiple context types with explicit initialization drm/virtgpu api: create context init feature drm/virtio: implement context init: track valid capabilities in a mask drm/virtio: implement context init: track {ring_idx, emit_fence_info} in virtio_gpu_fence drm/virtio: implement context init: plumb {base_fence_ctx, ring_idx} to virtio_gpu_fence_alloc drm/virtio: implement context init: stop using drv->context when creating fence drm/virtio: implement context init: allocate an array of fence contexts drm/virtio: implement context init: handle VIRTGPU_CONTEXT_PARAM_POLL_RINGS_MASK drm/virtio: implement context init: add virtio_gpu_fence_event drm/virtio: implement context init: advertise feature to userspace drivers/gpu/drm/virtio/virtgpu_debugfs.c | 1 + drivers/gpu/drm/virtio/virtgpu_drv.c | 44 ++++- drivers/gpu/drm/virtio/virtgpu_drv.h | 28 +++- drivers/gpu/drm/virtio/virtgpu_fence.c | 30 +++- drivers/gpu/drm/virtio/virtgpu_ioctl.c | 195 +++++++++++++++++++++-- drivers/gpu/drm/virtio/virtgpu_kms.c | 26 ++- drivers/gpu/drm/virtio/virtgpu_plane.c | 3 +- drivers/gpu/drm/virtio/virtgpu_vq.c | 19 +-- include/uapi/drm/virtgpu_drm.h | 27 ++++ include/uapi/linux/virtio_gpu.h | 18 ++- 10 files changed, 355 insertions(+), 36 deletions(-) -- 2.33.0.153.gba50c8fa24-goog

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dri-devel September 2021