- 08 Apr, 2024 3 commits
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Douglas Anderson authored
If we're using the AUX channel for eDP backlight and it fails to probe for some reason, let's _not_ fail the panel probe. At least one case where we could fail to init the backlight is because of a dead or physically missing panel. As talked about in detail in the earlier patch in this series, ("drm/panel-edp: If we fail to powerup/get EDID, use conservative timings"), this can cause the entire system's display pipeline to fail to come up and that's non-ideal. If we fail to init the backlight for some transitory reason, we should dig in and see if there's a way to fix this (perhaps retries?). Even in that case, though, having a panel whose backlight is stuck at 100% (the default, at least in the panel Samsung ATNA33XC20 I tested) is better than having no panel at all. Reviewed-by:Hsin-Yi Wang <hsinyi@chromium.org> Signed-off-by:
Douglas Anderson <dianders@chromium.org> Link: https://patchwork.freedesktop.org/patch/msgid/20240325145626.3.I552e8af0ddb1691cc0fe5d27ea3d8020e36f7006@changeid
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Douglas Anderson authored
If at boot we fail to power up the eDP panel (most often happens if the eDP panel never asserts HPD to us) or if we are unable to read the EDID at bootup to figure out the panel's ID then let's use the conservative eDP panel powerup/powerdown timings but _not_ fail the probe. It might seem strange to _not_ fail the probe in this case since we were unable to powerup the panel and confirm it's there. However, there is a reason to do this. Specifically, if we fail to probe the panel then it really throws the whole display pipeline for loop. Most DRM subsystems are written so that they wait until all components (including the panel) have probed before they set everything up. When the panel doesn't come up then this never happens. As a side effect of not setting everything up then other display adapters don't get initialized. As a practical example, I can see that if I open up a sc7180-trogdor based Chromebook that's using the generic "edp-panel" and unplug the eDP panel that it causes the _external_ DP monitor not to function. This is obviously bad because it means that a device with a dead eDP panel becomes e-waste when it could instead still be given useful life with an external display. NOTES: - When we fail to probe like this, boot is a bit slow because we try several times to power the panel up. This doesn't feel horrible because it'll eventually work and the retries are known to help bring some panels up. - In the case where we hit the condition of failing to power up, the display will likely _never_ have a chance to work again until reboot. Once the panel-edp pm_runtime resume function fails it doesn't ever seem to retry. This is probably for the best given that we don't have any real timing/modes. eDP isn't expected to be "hotplugged" so this makes some sense. - It turns out that this makes panel-edp behave more similarly for users of the generic "edp-panel" compatible string and the old fixed panel compatible string. With the old fixed panel compatible string we don't talk to the panel during probe so we'd actually behave much the same way that we'll now behave for the generic "edp-panel". Reviewed-by:
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Douglas Anderson authored
If we're using the generic "edp-panel" compatible string and we fail to detect an eDP panel then we fall back to conservative timings for powering up and powering down the panel. Abstract out the function for setting these timings so it can be used in future patches. No functional change expected--just code movement. Reviewed-by:
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- 05 Apr, 2024 5 commits
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Jeffrey Hugo authored
When debugging functional issues with workload input processing, it is useful to know if requests are backing up in the fifo, or perhaps getting stuck elsewhere. To answer the question of how many requests are in the fifo, implement a "queued" debugfs entry per-dbc that returns the number of pending requests when read. Signed-off-by:
Jeffrey Hugo <quic_jhugo@quicinc.com> Reviewed-by:
Carl Vanderlip <quic_carlv@quicinc.com> Reviewed-by:
Pranjal Ramajor Asha Kanojiya <quic_pkanojiy@quicinc.com> Reviewed-by:
Jacek Lawrynowicz <jacek.lawrynowicz@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20240322175730.3855440-4-quic_jhugo@quicinc.com
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Jeffrey Hugo authored
Each DMA Bridge Channel (dbc) has a unique configured fifo size which is specified by the userspace client of that dbc. Since the fifo is circular, it is useful to know the configured size when debugging issues. Add a per-dbc subdirectory in debugfs and in each subdirectory add a fifo_size entry that will display the size of that dbc's fifo when read. Signed-off-by:
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Jeffrey Hugo authored
During the boot process of AIC100, the bootloaders (PBL and SBL) log messages to device RAM. During SBL, if the host opens the QAIC_LOGGING channel, SBL will offload the contents of the log buffer to the host, and stream any new messages that SBL logs. This log of the boot process can be very useful for an initial triage of any boot related issues. For example, if SBL rejects one of the runtime firmware images for a validation failure, SBL will log a reason why. Add the ability of the driver to open the logging channel, receive the messages, and store them. Also define a debugfs entry called "bootlog" by hooking into the DRM debugfs framework. When the bootlog debugfs entry is read, the current contents of the log that the host is caching is displayed to the user. The driver will retain the cache until it detects that the device has rebooted. At that point, the cache will be freed, and the driver will wait for a new log. With this scheme, the driver will only have a cache of the log from the current device boot. Note that if the driver initializes a device and it is already in the runtime state (QSM), no bootlog will be available through this mechanism because the driver and SBL have not communicated. Signed-off-by:
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Maxime Ripard authored
Commit c0e0f139 ("drm: Make drivers depends on DRM_DW_HDMI") turned select dependencies into depends on ones. However, DRM_DW_HDMI was not manually selectable which resulted in no way to enable the drivers that were now depending on it. Fixes: 4fc8cb47 ("drm/display: Move HDMI helpers into display-helper module") Reported-by:
Mark Brown <broonie@kernel.org> Reported-by:
Alexander Stein <alexander.stein@ew.tq-group.com> Reviewed-by:
Maxime Ripard <mripard@kernel.org> Link: https://patchwork.freedesktop.org/patch/msgid/20240403-fix-dw-hdmi-kconfig-v1-2-afbc4a835c38@kernel.org
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Maxime Ripard authored
The DisplayPort helpers rely on some (__drm_atomic_helper_private_obj_duplicate_state, drm_kms_helper_hotplug_event) helpers found in files compiled by DRM_KMS_HELPER. Prior to commit d674858f ("drm/display: Make all helpers visible and switch to depends on"), DRM_DISPLAY_DP_HELPER was only selectable so it wasn't really a big deal. However, since that commit, it's now something that can be enabled as is, and since there's no expressed dependency with DRM_KMS_HELPER, it can break too. Since DRM_KMS_HELPER is a selectable option for now, let's select it for DRM_DISPLAY_DP_HELPER. Reported-by:
kernel test robot <lkp@intel.com> Closes: https://lore.kernel.org/oe-kbuild-all/202404021556.0JVcNC13-lkp@intel.com/ Closes: https://lore.kernel.org/oe-kbuild-all/202404021700.LbyYZGFd-lkp@intel.com/ Fixes: d674858f ("drm/display: Make all helpers visible and switch to depends on") Reviewed-by:
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- 04 Apr, 2024 2 commits
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Arnd Bergmann authored
Both the exynos and rockchip drivers ran into link failures after a Kconfig cleanup: aarch64-linux-ld: drivers/gpu/drm/exynos/exynos_dp.o: in function `exynos_dp_resume': exynos_dp.c:(.text+0xc0): undefined reference to `analogix_dp_resume' aarch64-linux-ld: drivers/gpu/drm/exynos/exynos_dp.o: in function `exynos_dp_suspend': exynos_dp.c:(.text+0xf4): undefined reference to `analogix_dp_suspend' x86_64-linux-ld: drivers/gpu/drm/rockchip/cdn-dp-core.o: in function `cdn_dp_connector_mode_valid': cdn-dp-core.c:(.text+0x13a): undefined reference to `drm_dp_bw_code_to_link_rate' x86_64-linux-ld: cdn-dp-core.c:(.text+0x148): undefined reference to `drm_dp_bw_code_to_link_rate' x86_64-linux-ld: drivers/gpu/drm/rockchip/cdn-dp-core.o: in function `cdn_dp_check_link_status': cdn-dp-core.c:(.text+0x1396): undefined reference to `drm_dp_channel_eq_ok' In both cases, the problem is that ROCKCHIP_CDN_DP and DRM_EXYNOS_DP are 'bool' symbols that depend on the the 'tristate' DRM_DISPLAY_HELPER symbol, but end up not working when the SoC specific part is built-in but the helper is in a loadable module. Use the same trick that DRM_ROCKCHIP already uses for the EXTCON dependency and disallow DP support when it would not work. Fixes: 0323287d ("drm: Switch DRM_DISPLAY_DP_HELPER to depends on") Signed-off-by:
Arnd Bergmann <arnd@arndb.de> Link: https://patchwork.freedesktop.org/patch/msgid/20240404124101.2988099-1-arnd@kernel.orgSigned-off-by:
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Adam Ford authored
The IRQ registration currently assumes that the GPIO is dedicated to it, but that may not necessarily be the case. If the board has another device sharing the GPIO, it won't be registered and the hot-plug detect fails to function. Currently, the handler reads two registers and blindly assumes one of them caused the interrupt and returns IRQ_HANDLED unless there is an error. In order to properly do this, the IRQ handler needs to check if it needs to handle the IRQ and return IRQ_NONE if there is nothing to handle. With the check added and the return code properly indicating whether or not it there was an IRQ, the IRQF_SHARED can be set to share a GPIO IRQ. V2: Add check to see if there is IRQ data to handle Signed-off-by:
Adam Ford <aford173@gmail.com> Reviewed-by:
Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Reviewed-by:
Dmitry Baryshkov <dmitry.baryshkov@linaro.org> Signed-off-by:
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- 03 Apr, 2024 7 commits
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Harshit Mogalapalli authored
The kernel doc says this function returns either a valid pointer or an ERR_PTR(), but in practice this function can return NULL if create=false. Fix the function to match the doc (return ERR_PTR(-ENOENT) instead of NULL) and adjust all call-sites accordingly. Fixes: 4bdca115 ("drm/panthor: Add the driver frontend block") Signed-off-by:
Harshit Mogalapalli <harshit.m.mogalapalli@oracle.com> Reviewed-by:
Boris Brezillon <boris.brezillon@collabora.com> Signed-off-by:
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Harshit Mogalapalli authored
The devm_drm_dev_alloc() function returns error pointers. Update the error handling to check for error pointers instead of NULL. Fixes: 4bdca115 ("drm/panthor: Add the driver frontend block") Signed-off-by:
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Dan Carpenter authored
The ->iface.streams[csg_slot][] array has MAX_CS_PER_CSG elements so this > comparison needs to be >= to prevent an out of bounds access. Fixes: 2718d918 ("drm/panthor: Add the FW logical block") Signed-off-by:
Dan Carpenter <dan.carpenter@linaro.org> Reviewed-by:
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Dan Carpenter authored
This code accidentally returns zero/success on error because of a typo. It should be "irq" instead of "ret". The other thing is that if platform_get_irq_byname() were to return zero then the error code would be cmplicated. Fortunately, it does not so we can just change <= to < 0. Fixes: 5cd894e2 ("drm/panthor: Add the GPU logical block") Signed-off-by:
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Dan Carpenter authored
These error paths forgot to set the error code to -ENOMEM. Fixes: 647810ec ("drm/panthor: Add the MMU/VM logical block") Signed-off-by:
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Liviu Dudau authored
When compiling with W=1 the build process will flag empty comments, misnamed documented variables and incorrect tagging of functions. Fix them in one go. Fixes: de854881 ("drm/panthor: Add the scheduler logical block") Cc: Boris Brezillon <boris.brezillon@collabora.com> Cc: Steven Price <steven.price@arm.com> Signed-off-by:
Liviu Dudau <liviu.dudau@arm.com> Reviewed-by:
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Liviu Dudau authored
Commit 962f88b9 ("drm/panthor: Drop the dev_enter/exit() sections in _irq_suspend/resume()") removed the code that used the 'cookie' variable but left the declaration in place. Remove it. Fixes: 962f88b9 ("drm/panthor: Drop the dev_enter/exit() sections in _irq_suspend/resume()") Cc: Boris Brezillon <boris.brezillon@collabora.com> Cc: Steven Price <steven.price@arm.com> Signed-off-by:
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- 02 Apr, 2024 18 commits
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Thomas Zimmermann authored
Automatically clean up the conncetor-poll thread as part of the DRM device release. The new helper drmm_kms_helper_poll_init() provides a shared implementation for all drivers. v6: - fix kernel doc comment (Sui, kernel test robot) Signed-off-by:
Thomas Zimmermann <tzimmermann@suse.de> Reviewed-by:
Jocelyn Falempe <jfalempe@redhat.com> Acked-by:
Sui Jingfeng <sui.jingfeng@linux.dev> Link: https://patchwork.freedesktop.org/patch/msgid/20240325200855.21150-14-tzimmermann@suse.de
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Thomas Zimmermann authored
Implement polling for VGA and SIL164 connectors. Set the flag DRM_CONNECTOR_POLL_DISCONNECT for each to detect the removal of the monitor cable. Implement struct drm_connector_helper_funcs.detect_ctx for each type of connector by testing for EDID data. The helper drm_connector_helper_detect_ctx() implements .detect_ctx() on top of the connector's DDC channel. The function can be used by other drivers as companion to drm_connector_helper_get_modes(). v6: - change helper name to drm_connector_helper_detec_from_ddc() (Maxime, Sui) v5: - share implementation in drm_connector_helper_detect_ctx() (Maxime) - test for DDC presence with drm_probe_ddc() (Maxime, Jani) Signed-off-by:
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Thomas Zimmermann authored
The .get_modes() code for VGA and SIL164 connectors does not depend on either type of connector. Replace the driver code with the common helper drm_connector_helper_get_modes(). It reads EDID data via DDC and updates the connector's EDID property. Signed-off-by:
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Thomas Zimmermann authored
The modeset lock protects the DDC code from concurrent modeset operations, which use the same registers. Move that code from the connector helpers into the DDC helpers .pre_xfer() and .post_xfer(). Both, .pre_xfer() and .post_xfer(), enclose the transfer of data blocks over the I2C channel in the internal I2C function bit_xfer(). Both calls are executed unconditionally if present. Invoking DDC transfers from any where within the driver now takes the lock. Signed-off-by:
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Thomas Zimmermann authored
Align the names of the algo-bit helpers with ast's convention of using an ast prefix plus the struct's name plus the callback's name for such function symbols. Change the parameter names of these helpers to 'data' and 'state', as used in the declaration of struct i2c_algo_bit_data. No functional changes. Signed-off-by:
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Thomas Zimmermann authored
The DDC code needs the AST device. Store a pointer in struct ast_ddc and avoid internal upcasts. Improves type safety within the DDC code. Signed-off-by:
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Thomas Zimmermann authored
The DDC code needs the AST device. Pass it to ast_ddc_create() and avoid an internal upcast. Improves type safety within the DDC code. Signed-off-by:
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Thomas Zimmermann authored
The struct struct ast_i2c_chan represents the Display Data Channel (DDC); I2C is the underlying bus. Rename the structure, the variables and the helper ast_i2c_create() to ddc-like terms. No functional changes. Signed-off-by:
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Thomas Zimmermann authored
Rename ast_i2c.c to ast_ddc.c and move its interface into the new header ast_ddc.h. Update all include statements as necessary and change the adapter name to 'AST DDC bus'. This avoids including I2C headers in the driver's main header file, which doesn't need them. Renaming files to _ddc indicates that the code is about the DDC. I2C is really just the underlying bus here. Signed-off-by:
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Thomas Zimmermann authored
Replace kzalloc() with drmm_kzalloc() and thereby put the release of the I2C instance into a separate action. Avoids explicit error roll- back in ast_i2c_chan_create(). No functional changes. Signed-off-by:
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Thomas Zimmermann authored
Both, struct ast_vga_connector and struct ast_sil164_connector, are now wrappers around struct drm_connector. Remove them. Signed-off-by:
Patrik Jakobsson <patrik.r.jakobsson@gmail.com> Reviewed-by:
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Thomas Zimmermann authored
Expect the hardware to provide a DDC channel. Fail probing if its initialization fails. Failing to initialize the DDC indicates a larger problem, so there's no point in continuing. v4: * give a rational in the commit message Signed-off-by:
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Thomas Zimmermann authored
Include <linux/of.h> to get of_property_read_u32() in the source files that need it. Avoids the proxy include via <linux/i2c.h>. Signed-off-by:
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Thomas Zimmermann authored
Backmerging to get v6.9-rc2 changes into drm-misc-next. Signed-off-by: -
Nathan Chancellor authored
Clang warns (or errors with CONFIG_WERROR): drivers/gpu/drm/panthor/panthor_sched.c:2048:6: error: variable 'csg_mod_mask' set but not used [-Werror,-Wunused-but-set-variable] 2048 | u32 csg_mod_mask = 0, free_csg_slots = 0; | ^ 1 error generated. The variable is an artifact left over from refactoring that occurred during the development of the initial series for this driver. Remove it to resolve the warning. Fixes: de854881 ("drm/panthor: Add the scheduler logical block") Signed-off-by:Nathan Chancellor <nathan@kernel.org> Reviewed-by:
Steven Price <steven.price@arm.com> Reviewed-by:
Justin Stitt <justinstitt@google.com> Signed-off-by:
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Boris Brezillon authored
There's no reason for _irq_suspend/resume() to be called after the device has been unplugged, and keeping this dev_enter/exit() section in _irq_suspend() is turns _irq_suspend() into a NOP when called from the _unplug() functions, which we don't want. v3: - New patch Fixes: 5fe909ca ("drm/panthor: Add the device logical block") Signed-off-by:
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Boris Brezillon authored
Make sure we set suspended=true last to avoid generating an irq storm in the unlikely case where an IRQ happens between the suspended=true assignment and the _INT_MASK update. We also move the mask=0 assignment before writing to the _INT_MASK register to prevent the thread handler from unmasking the interrupt behind our back. This means we might lose events if there were some pending when we get to suspend the IRQ, but that's fine. The synchronize_irq() we have in the _irq_suspend() path was not there to make sure all IRQs are processed, just to make sure we don't have registers accesses coming from the irq handlers after _irq_suspend() has been called. If there's a need to have all pending IRQs processed, it should happen before _irq_suspend() is called. v3: - Add Steve's R-b v2: - New patch Fixes: 5fe909ca ("drm/panthor: Add the device logical block") Reported-by:
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Boris Brezillon authored
When mapping an IO region, the pseudo-file offset is dependent on the userspace architecture. panthor_device_mmio_offset() abstracts that away for us by turning a userspace MMIO offset into its kernel equivalent, but we were not updating vm_area_struct::vm_pgoff accordingly, leading us to attach the MMIO region to the wrong file offset. This has implications when we start mixing 64 bit and 32 bit apps, but that's only really a problem when we start having more that 2^43 bytes of memory allocated, which is very unlikely to happen. What's more problematic is the fact this turns our unmap_mapping_range(DRM_PANTHOR_USER_MMIO_OFFSET) calls, which are supposed to kill the MMIO mapping when entering suspend, into NOPs. Which means we either keep the dummy flush_id mapping active at all times, or we risk a BUS_FAULT if the MMIO region was mapped, and the GPU is suspended after that. Solve that by patching vm_pgoff early in panthor_mmap(). With this in place, we no longer need the panthor_device_mmio_offset() helper. v3: - No changes v2: - Kill panthor_device_mmio_offset() Fixes: 5fe909ca ("drm/panthor: Add the device logical block") Reported-by:
Adrián Larumbe <adrian.larumbe@collabora.com> Reported-by:
Lukas F. Hartmann <lukas@mntmn.com> Closes: https://gitlab.freedesktop.org/mesa/mesa/-/issues/10835Signed-off-by:
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- 31 Mar, 2024 5 commits
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Linus Torvalds authored
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Linus Torvalds authored
Merge tag 'kbuild-fixes-v6.9' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild Pull Kbuild fixes from Masahiro Yamada: - Deduplicate Kconfig entries for CONFIG_CXL_PMU - Fix unselectable choice entry in MIPS Kconfig, and forbid this structure - Remove unused include/asm-generic/export.h - Fix a NULL pointer dereference bug in modpost - Enable -Woverride-init warning consistently with W=1 - Drop KCSAN flags from *.mod.c files * tag 'kbuild-fixes-v6.9' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: kconfig: Fix typo HEIGTH to HEIGHT Documentation/llvm: Note s390 LLVM=1 support with LLVM 18.1.0 and newer kbuild: Disable KCSAN for autogenerated *.mod.c intermediaries kbuild: make -Woverride-init warnings more consistent modpost: do not make find_tosym() return NULL export.h: remove include/asm-generic/export.h kconfig: do not reparent the menu inside a choice block MIPS: move unselectable FIT_IMAGE_FDT_EPM5 out of the "System type" choice cxl: remove CONFIG_CXL_PMU entry in drivers/cxl/Kconfig
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git://git.kernel.org/pub/scm/linux/kernel/git/ras/rasLinus Torvalds authored
Pull EDAC fixes from Borislav Petkov: - Fix more issues in the AMD FMPM driver * tag 'edac_urgent_for_v6.9_rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/ras/ras: RAS: Avoid build errors when CONFIG_DEBUG_FS=n RAS/AMD/FMPM: Safely handle saved records of various sizes RAS/AMD/FMPM: Avoid NULL ptr deref in get_saved_records()
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds authored
Pull irq fixes from Borislav Petkov: - Fix an unused function warning on irqchip/irq-armada-370-xp - Fix the IRQ sharing with pinctrl-amd and ACPI OSL * tag 'irq_urgent_for_v6.9_rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: irqchip/armada-370-xp: Suppress unused-function warning genirq: Introduce IRQF_COND_ONESHOT and use it in pinctrl-amd
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds authored
Pull x86 perf fixes from Borislav Petkov: - Define the correct set of default hw events on AMD Zen4 - Use the correct stalled cycles PMCs on AMD Zen2 and newer - Fix detection of the LBR freeze feature on AMD * tag 'perf_urgent_for_v6.9_rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: perf/x86/amd/core: Define a proper ref-cycles event for Zen 4 and later perf/x86/amd/core: Update and fix stalled-cycles-* events for Zen 2 and later perf/x86/amd/lbr: Use freeze based on availability x86/cpufeatures: Add new word for scattered features
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