kernel/linux.git/drivers/gpu/drm/arm/display, branch v5.8.10

drm/atomic-helper: reset vblank on crtc reset

2020-09-03T09:29:50+00:00

[ Upstream commit 51f644b40b4b794b28b982fdd5d0dd8ee63f9272 ] Only when vblanks are supported ofc. Some drivers do this already, but most unfortunately missed it. This opens up bugs after driver load, before the crtc is enabled for the first time. syzbot spotted this when loading vkms as a secondary output. Given how many drivers are buggy it's best to solve this once and for all in shared helper code. Aside from moving the few existing calls to drm_crtc_vblank_reset into helpers (i915 doesn't use helpers, so keeps its own) I think the regression risk is minimal: atomic helpers already rely on drivers calling drm_crtc_vblank_on/off correctly in their hooks when they support vblanks. And driver that's failing to handle vblanks after this is missing those calls already, and vblanks could only work by accident when enabling a CRTC for the first time right after boot. Big thanks to Tetsuo for helping track down what's going wrong here. There's only a few drivers which already had the necessary call and needed some updating: - komeda, atmel and tidss also needed to be changed to call __drm_atomic_helper_crtc_reset() intead of open coding it - tegra and msm even had it in the same place already, just code motion, and malidp already uses __drm_atomic_helper_crtc_reset(). - Laurent noticed that rcar-du and omap open-code their crtc reset and hence would actually be broken by this patch now. So fix them up by reusing the helpers, which brings the drm_crtc_vblank_reset() back. Only call left is in i915, which doesn't use drm_mode_config_reset, but has its own fastboot infrastructure. So that's the only case where we actually want this in the driver still. I've also reviewed all other drivers which set up vblank support with drm_vblank_init. After the previous patch fixing mxsfb all atomic drivers do call drm_crtc_vblank_on/off as they should, the remaining drivers are either legacy kms or legacy dri1 drivers, so not affected by this change to atomic helpers. v2: Use the drm_dev_has_vblank() helper. v3: Laurent pointed out that omap and rcar-du used drm_crtc_vblank_off instead of drm_crtc_vblank_reset. Adjust them too. v4: Laurent noticed that rcar-du and omap open-code their crtc reset and hence would actually be broken by this patch now. So fix them up by reusing the helpers, which brings the drm_crtc_vblank_reset() back. v5: also mention rcar-du and ompadrm in the proper commit message above (Laurent). Reviewed-by: Laurent Pinchart Acked-by: Maxime Ripard Cc: Laurent Pinchart Reviewed-by: Boris Brezillon Acked-by: Liviu Dudau Acked-by: Thierry Reding Link: https://syzkaller.appspot.com/bug?id=0ba17d70d062b2595e1f061231474800f076c7cb Reported-by: Tetsuo Handa Reported-by: syzbot+0871b14ca2e2fb64f6e3@syzkaller.appspotmail.com Cc: Tetsuo Handa Cc: "James (Qian) Wang" Cc: Liviu Dudau Cc: Mihail Atanassov Cc: Brian Starkey Cc: Sam Ravnborg Cc: Boris Brezillon Cc: Nicolas Ferre Cc: Alexandre Belloni Cc: Ludovic Desroches Cc: Maarten Lankhorst Cc: Maxime Ripard Cc: Thomas Zimmermann Cc: David Airlie Cc: Daniel Vetter Cc: Thierry Reding Cc: Jonathan Hunter Cc: Jyri Sarha Cc: Tomi Valkeinen Cc: Rob Clark Cc: Sean Paul Cc: Brian Masney Cc: Emil Velikov Cc: zhengbin Cc: Thomas Gleixner Cc: linux-tegra@vger.kernel.org Cc: Kieran Bingham Cc: linux-arm-kernel@lists.infradead.org Cc: linux-renesas-soc@vger.kernel.org Signed-off-by: Daniel Vetter Link: https://patchwork.freedesktop.org/patch/msgid/20200612160056.2082681-1-daniel.vetter@ffwll.ch Signed-off-by: Sasha Levin

drm/komeda: use devm_drm_dev_alloc

2020-04-28T14:04:00+00:00

Komeda uses the component framework, which does open/close a new devres group around all the bind callbacks. Which means we can use devm_ functions for managing the drm_device cleanup, with leaking stuff in case of deferred probes or other reasons to unbind components, or the component_master. Also note that this fixes a double-free in the probe unroll code, bot drm_dev_put and kfree(kms) result in the kms allocation getting freed. Aside: komeda_bind could be cleaned up a lot, devm_kfree is a bit redundant. Plus I'm not clear on why there's suballocations for mdrv->mdev and mdrv->kms. Plus I'm not sure the lifetimes are correct with all that devm_kzalloc usage ... That structure layout is also the reason why komeda still uses drm_device->dev_private and can't easily be replaced with a proper container_of upcasting. I'm pretty sure that there's endless amounts of hotunplug/hotremove bugs in there with all the unprotected dereferencing of drm_device->dev_private. Reviewed-by: James Qian Wang Signed-off-by: Daniel Vetter Cc: "James (Qian) Wang" Cc: Liviu Dudau Cc: Mihail Atanassov Link: https://patchwork.freedesktop.org/patch/msgid/20200415074034.175360-33-daniel.vetter@ffwll.ch

Merge drm/drm-next into drm-misc-next

2020-04-17T06:12:22+00:00

Backmerging required to pull topic/phy-compliance. Signed-off-by: Thomas Zimmermann

drm/: Use drmm_add_final_kfree

2020-03-26T14:26:52+00:00

These are the leftover drivers that didn't have a ->release hook that needed to be updated. Acked-by: Sam Ravnborg Acked-by: Liviu Dudau Signed-off-by: Daniel Vetter Cc: "James (Qian) Wang" Cc: Liviu Dudau Cc: Mihail Atanassov Cc: Russell King Cc: Hans de Goede Link: https://patchwork.freedesktop.org/patch/msgid/20200323144950.3018436-19-daniel.vetter@ffwll.ch

drm/komeda: mark PM functions as __maybe_unused

2020-03-06T03:25:58+00:00

Without this, we get a couple of warnings when CONFIG_PM is disabled: drivers/gpu/drm/arm/display/komeda/komeda_drv.c:156:12: error: 'komeda_rt_pm_resume' defined but not used [-Werror=unused-function] static int komeda_rt_pm_resume(struct device *dev) ^~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/arm/display/komeda/komeda_drv.c:149:12: error: 'komeda_rt_pm_suspend' defined but not used [-Werror=unused-function] static int komeda_rt_pm_suspend(struct device *dev) ^~~~~~~~~~~~~~~~~~~~ Fixes: efb465088518 ("drm/komeda: Add runtime_pm support") Signed-off-by: Arnd Bergmann Reviewed-by: James Qian Wang (Arm Technology China) Signed-off-by: james qian wang (Arm Technology China) Link: https://patchwork.freedesktop.org/patch/msgid/20200107215327.1579195-1-arnd@arndb.de

Merge tag 'drm-misc-next-2020-01-02' of git://anongit.freedesktop.org/drm/drm-misc into drm-next

2020-01-03T01:43:44+00:00

drm-misc-next for v5.6: UAPI Changes: - Commandline parser: Add support for panel orientation, and per-mode options. - Fix IOCTL naming for dma-buf heaps. Cross-subsystem Changes: - Rename DMA_HEAP_IOC_ALLOC to DMA_HEAP_IOCTL_ALLOC before it becomes abi. - Change DMA-BUF system-heap's name to system. - Fix leak in error handling in dma_heap_ioctl(), and make a symbol static. - Fix udma-buf cpu access. - Fix ti devicetree bindings. Core Changes: - Add CTA-861-G modes with VIC >= 193. - Change error handling and remove bug_on in *drm_dev_init. - Export drm_panel_of_backlight() correctly once more. - Add support for lvds decoders. - Convert drm/client and drm/(gem-,)fb-helper to drm-device based logging and update logging todo. Driver Changes: - Add support for dsi/px30 to rockchip. - Add fb damage support to virtio. - Use dma_resv locking wrappers in vc4, msm, etnaviv. - Make functions in virtio static, and perform some simplifications. - Add suspend support to sun4i. - Add A64 mipi dsi support to sun4i. - Add runtime pm suspend to komeda. - Associated driver fixes. Signed-off-by: Dave Airlie From: Maarten Lankhorst Link: https://patchwork.freedesktop.org/patch/msgid/efc11139-1653-86bc-1b0f-0aefde219850@linux.intel.com

drm/komeda: Add runtime_pm support

2019-12-27T05:45:44+00:00

- Add pm_runtime_get/put to crtc_enable/disable along with the real display usage - Add runtime_get/put to register_show, since register_show() will access register, need to wakeup HW. - For the case that PM is not enabled or configured, manually wakeup HW Signed-off-by: james qian wang (Arm Technology China) Reviewed-by: Mihail Atanassov Link: https://patchwork.freedesktop.org/patch/msgid/20191212074756.14678-1-james.qian.wang@arm.com

drm/komeda: Add event handling for EMPTY/FULL

2019-12-27T03:38:44+00:00

EMPTY/FULL are HW input/output FIFO condition identifer, which are useful information for addressing the problem, so expose them. Signed-off-by: james qian wang (Arm Technology China) Reviewed-by: Mihail Atanassov Link: https://patchwork.freedesktop.org/patch/msgid/20191212072737.30116-1-james.qian.wang@arm.com

Merge tag 'drm-misc-next-2019-12-16' of git://anongit.freedesktop.org/drm/drm-misc into drm-next

2019-12-17T12:57:54+00:00

drm-misc-next for v5.6: UAPI Changes: - Add support for DMA-BUF HEAPS. Cross-subsystem Changes: - mipi dsi definition updates, pulled into drm-intel as well. - Add lockdep annotations for dma_resv vs mmap_sem and fs_reclaim. - Remove support for dma-buf kmap/kunmap. - Constify fb_ops in all fbdev drivers, including drm drivers and drm-core, and media as well. Core Changes: - Small cleanups to ttm. - Fix SCDC definition. - Assorted cleanups to core. - Add todo to remove load/unload hooks, and use generic fbdev emulation. - Assorted documentation updates. - Use blocking ww lock in ttm fault handler. - Remove drm_fb_helper_fbdev_setup/teardown. - Warning fixes with W=1 for atomic. - Use drm_debug_enabled() instead of drm_debug flag testing in various drivers. - Fallback to nontiled mode in fbdev emulation when not all tiles are present. (Later on reverted) - Various kconfig indentation fixes in core and drivers. - Fix freeing transactions in dp-mst correctly. - Sean Paul is steping down as core maintainer. :-( - Add lockdep annotations for atomic locks vs dma-resv. - Prevent use-after-free for a bad job in drm_scheduler. - Fill out all block sizes in the P01x and P210 definitions. - Avoid division by zero in drm/rect, and fix bounds. - Add drm/rect selftests. - Add aspect ratio and alternate clocks for HDMI 4k modes. - Add todo for drm_framebuffer_funcs and fb_create cleanup. - Drop DRM_AUTH for prime import/export ioctls. - Clear DP-MST payload id tables downstream when initializating. - Fix for DSC throughput definition. - Add extra FEC definitions. - Fix fake offset in drm_gem_object_funs.mmap. - Stop using encoder->bridge in core directly - Handle bridge chaining slightly better. - Add backlight support to drm/panel, and use it in many panel drivers. - Increase max number of y420 modes from 128 to 256, as preparation to add the new modes. Driver Changes: - Small fixes all over. - Fix documentation in vkms. - Fix mmap_sem vs dma_resv in nouveau. - Small cleanup in komeda. - Add page flip support in gma500 for psb/cdv. - Add ddc symlink in the connector sysfs directory for many drivers. - Add support for analogic an6345, and fix small bugs in it. - Add atomic modesetting support to ast. - Fix radeon fault handler VMA race. - Switch udl to use generic shmem helpers. - Unconditional vblank handling for mcde. - Miscellaneous fixes to mcde. - Tweak debug output from komeda using debugfs. - Add gamma and color transform support to komeda for DOU-IPS. - Add support for sony acx424AKP panel. - Various small cleanups to gma500. - Use generic fbdev emulation in udl, and replace udl_framebuffer with generic implementation. - Add support for Logic PD Type 28 panel. - Use drm_panel_* wrapper functions in exynos/tegra/msm. - Add devicetree bindings for generic DSI panels. - Don't include drm_pci.h directly in many drivers. - Add support for begin/end_cpu_access in udmabuf. - Stop using drm_get_pci_dev in gma500 and mga200. - Fixes to UDL damage handling, and use dma_buf_begin/end_cpu_access. - Add devfreq thermal support to panfrost. - Fix hotplug with daisy chained monitors by removing VCPI when disabling topology manager. - meson: Add support for OSD1 plane AFBC commit. - Stop displaying garbage when toggling ast primary plane on/off. - More cleanups and fixes to UDL. - Add D32 suport to komeda. - Remove globle copy of drm_dev in gma500. - Add support for Boe Himax8279d MIPI-DSI LCD panel. - Add support for ingenic JZ4770 panel. - Small null pointer deference fix in ingenic. - Remove support for the special tfp420 driver, as there is a generic way to do it. Signed-off-by: Daniel Vetter From: Maarten Lankhorst Link: https://patchwork.freedesktop.org/patch/msgid/ba73535a-9334-5302-2e1f-5208bd7390bd@linux.intel.com

drm/komeda: Enable new product D32 support

2019-12-12T06:54:19+00:00

D32 is simple version of D71, the difference is: - Only has one pipeline - Drop the periph block and merge it to GCU v2: Rebase. v3: Isolate the block counting fix to a new patch Signed-off-by: James Qian Wang (Arm Technology China) Reviewed-by: Mihail Atanassov Link: https://patchwork.freedesktop.org/patch/msgid/20191210084828.19664-3-james.qian.wang@arm.com