This series adds support to use devcoredump for DPU driver. It introduces the msm_disp_snapshot module which assists in the capturing of register dumps during error scenarios. When a display related error happens, the msm_disp_snapshot module captures all the relevant register dumps along with the snapshot of the drm atomic state and triggers a devcoredump.
changes in v5: - move the storage of disp_state from dpu_kms to msm_kms - absorb snprintf into the snapshot core by accepting var args - initialize disp snapshot module even for non-DPU targets - split up the patches into dpu, dsi and dp pieces for easier review - get rid of MSM_DISP_SNAPSHOT_IN_* macros by simplifying function
Abhinav Kumar (7): drm: allow drm_atomic_print_state() to accept any drm_printer drm/msm: add support to take dpu snapshot drm/msm/dsi: add API to take DSI register snapshot drm/msm/dp: add API to take DP register snapshot drm/msm/disp/dpu1: add API to take DPU register snapshot drm/msm: add support to take dsi, dp and dpu snapshot drm/msm: add disp snapshot points across dpu driver
drivers/gpu/drm/drm_atomic.c | 28 ++- drivers/gpu/drm/drm_atomic_uapi.c | 4 +- drivers/gpu/drm/drm_crtc_internal.h | 4 +- drivers/gpu/drm/msm/Makefile | 2 + drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c | 16 +- .../gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c | 14 +- .../gpu/drm/msm/disp/dpu1/dpu_encoder_phys_vid.c | 8 +- drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h | 2 +- drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c | 50 ++++++ drivers/gpu/drm/msm/disp/msm_disp_snapshot.c | 161 +++++++++++++++++ drivers/gpu/drm/msm/disp/msm_disp_snapshot.h | 154 ++++++++++++++++ drivers/gpu/drm/msm/disp/msm_disp_snapshot_util.c | 195 +++++++++++++++++++++ drivers/gpu/drm/msm/dp/dp_catalog.c | 9 + drivers/gpu/drm/msm/dp/dp_catalog.h | 4 + drivers/gpu/drm/msm/dp/dp_display.c | 29 +++ drivers/gpu/drm/msm/dp/dp_display.h | 1 + drivers/gpu/drm/msm/dsi/dsi.c | 5 + drivers/gpu/drm/msm/dsi/dsi.h | 5 +- drivers/gpu/drm/msm/dsi/dsi_host.c | 16 ++ drivers/gpu/drm/msm/msm_drv.c | 27 ++- drivers/gpu/drm/msm/msm_drv.h | 2 + drivers/gpu/drm/msm/msm_kms.h | 7 + drivers/gpu/drm/selftests/test-drm_framebuffer.c | 1 + 23 files changed, 725 insertions(+), 19 deletions(-) create mode 100644 drivers/gpu/drm/msm/disp/msm_disp_snapshot.c create mode 100644 drivers/gpu/drm/msm/disp/msm_disp_snapshot.h create mode 100644 drivers/gpu/drm/msm/disp/msm_disp_snapshot_util.c
Currently drm_atomic_print_state() internally allocates and uses a drm_info printer. Allow it to accept any drm_printer type so that the API can be leveraged even for taking drm snapshot.
Rename the drm_atomic_print_state() to drm_atomic_print_new_state() so that it reflects its functionality better.
changes in v5: - none
Reported-by: kernel test robot lkp@intel.com Signed-off-by: Abhinav Kumar abhinavk@codeaurora.org Reviewed-by: Daniel Vetter daniel.vetter@ffwll.ch --- drivers/gpu/drm/drm_atomic.c | 28 +++++++++++++++++++----- drivers/gpu/drm/drm_atomic_uapi.c | 4 +++- drivers/gpu/drm/drm_crtc_internal.h | 4 +++- drivers/gpu/drm/selftests/test-drm_framebuffer.c | 1 + 4 files changed, 30 insertions(+), 7 deletions(-)
diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c index dda6005..7041a26 100644 --- a/drivers/gpu/drm/drm_atomic.c +++ b/drivers/gpu/drm/drm_atomic.c @@ -1,6 +1,7 @@ /* * Copyright (C) 2014 Red Hat * Copyright (C) 2014 Intel Corp. + * Copyright (c) 2020-2021, The Linux Foundation. All rights reserved. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), @@ -1573,9 +1574,20 @@ int __drm_atomic_helper_set_config(struct drm_mode_set *set, } EXPORT_SYMBOL(__drm_atomic_helper_set_config);
-void drm_atomic_print_state(const struct drm_atomic_state *state) +/** + * drm_atomic_print_new_state - prints drm atomic state + * @state: atomic configuration to check + * @p: drm printer + * + * This functions prints the drm atomic state snapshot using the drm printer + * which is passed to it. This snapshot can be used for debugging purposes. + * + * Note that this function looks into the new state objects and hence its not + * safe to be used after the call to drm_atomic_helper_commit_hw_done(). + */ +void drm_atomic_print_new_state(const struct drm_atomic_state *state, + struct drm_printer *p) { - struct drm_printer p = drm_info_printer(state->dev->dev); struct drm_plane *plane; struct drm_plane_state *plane_state; struct drm_crtc *crtc; @@ -1584,17 +1596,23 @@ void drm_atomic_print_state(const struct drm_atomic_state *state) struct drm_connector_state *connector_state; int i;
+ if (!p) { + DRM_ERROR("invalid drm printer\n"); + return; + } + DRM_DEBUG_ATOMIC("checking %p\n", state);
for_each_new_plane_in_state(state, plane, plane_state, i) - drm_atomic_plane_print_state(&p, plane_state); + drm_atomic_plane_print_state(p, plane_state);
for_each_new_crtc_in_state(state, crtc, crtc_state, i) - drm_atomic_crtc_print_state(&p, crtc_state); + drm_atomic_crtc_print_state(p, crtc_state);
for_each_new_connector_in_state(state, connector, connector_state, i) - drm_atomic_connector_print_state(&p, connector_state); + drm_atomic_connector_print_state(p, connector_state); } +EXPORT_SYMBOL(drm_atomic_print_new_state);
static void __drm_state_dump(struct drm_device *dev, struct drm_printer *p, bool take_locks) diff --git a/drivers/gpu/drm/drm_atomic_uapi.c b/drivers/gpu/drm/drm_atomic_uapi.c index 268bb69..c340a67 100644 --- a/drivers/gpu/drm/drm_atomic_uapi.c +++ b/drivers/gpu/drm/drm_atomic_uapi.c @@ -2,6 +2,7 @@ * Copyright (C) 2014 Red Hat * Copyright (C) 2014 Intel Corp. * Copyright (C) 2018 Intel Corp. + * Copyright (c) 2020, The Linux Foundation. All rights reserved. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), @@ -1321,6 +1322,7 @@ int drm_mode_atomic_ioctl(struct drm_device *dev, struct drm_out_fence_state *fence_state; int ret = 0; unsigned int i, j, num_fences; + struct drm_printer p = drm_info_printer(dev->dev);
/* disallow for drivers not supporting atomic: */ if (!drm_core_check_feature(dev, DRIVER_ATOMIC)) @@ -1453,7 +1455,7 @@ int drm_mode_atomic_ioctl(struct drm_device *dev, ret = drm_atomic_nonblocking_commit(state); } else { if (drm_debug_enabled(DRM_UT_STATE)) - drm_atomic_print_state(state); + drm_atomic_print_new_state(state, &p);
ret = drm_atomic_commit(state); } diff --git a/drivers/gpu/drm/drm_crtc_internal.h b/drivers/gpu/drm/drm_crtc_internal.h index 54d4cf1..1ca51ad 100644 --- a/drivers/gpu/drm/drm_crtc_internal.h +++ b/drivers/gpu/drm/drm_crtc_internal.h @@ -5,6 +5,7 @@ * Jesse Barnes jesse.barnes@intel.com * Copyright © 2014 Intel Corporation * Daniel Vetter daniel.vetter@ffwll.ch + * Copyright (c) 2020, The Linux Foundation. All rights reserved. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), @@ -236,7 +237,8 @@ int __drm_atomic_helper_disable_plane(struct drm_plane *plane, int __drm_atomic_helper_set_config(struct drm_mode_set *set, struct drm_atomic_state *state);
-void drm_atomic_print_state(const struct drm_atomic_state *state); +void drm_atomic_print_new_state(const struct drm_atomic_state *state, + struct drm_printer *p);
/* drm_atomic_uapi.c */ int drm_atomic_connector_commit_dpms(struct drm_atomic_state *state, diff --git a/drivers/gpu/drm/selftests/test-drm_framebuffer.c b/drivers/gpu/drm/selftests/test-drm_framebuffer.c index 789f227..61b44d3 100644 --- a/drivers/gpu/drm/selftests/test-drm_framebuffer.c +++ b/drivers/gpu/drm/selftests/test-drm_framebuffer.c @@ -8,6 +8,7 @@ #include <drm/drm_device.h> #include <drm/drm_mode.h> #include <drm/drm_fourcc.h> +#include <drm/drm_print.h>
#include "../drm_crtc_internal.h"
Add the msm_disp_snapshot module which adds supports to dump dpu registers and capture the drm atomic state which can be used in case of error conditions.
changes in v5: - start storing disp_state in msm_kms instead of dpu_kms - get rid of MSM_DISP_SNAPSHOT_IN_* enum by simplifying the functions - move snprintf inside the snapshot core by using varargs - get rid of some stale code comments - allow snapshot module for non-DPU targets
Reported-by: kernel test robot lkp@intel.com Signed-off-by: Abhinav Kumar abhinavk@codeaurora.org --- drivers/gpu/drm/msm/Makefile | 2 + drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h | 2 +- drivers/gpu/drm/msm/disp/msm_disp_snapshot.c | 161 +++++++++++++++++++ drivers/gpu/drm/msm/disp/msm_disp_snapshot.h | 153 ++++++++++++++++++ drivers/gpu/drm/msm/disp/msm_disp_snapshot_util.c | 179 ++++++++++++++++++++++ drivers/gpu/drm/msm/dp/dp_display.h | 1 + drivers/gpu/drm/msm/dsi/dsi.c | 1 + drivers/gpu/drm/msm/dsi/dsi_host.c | 1 + drivers/gpu/drm/msm/msm_drv.c | 27 +++- drivers/gpu/drm/msm/msm_drv.h | 1 + drivers/gpu/drm/msm/msm_kms.h | 3 + 11 files changed, 529 insertions(+), 2 deletions(-) create mode 100644 drivers/gpu/drm/msm/disp/msm_disp_snapshot.c create mode 100644 drivers/gpu/drm/msm/disp/msm_disp_snapshot.h create mode 100644 drivers/gpu/drm/msm/disp/msm_disp_snapshot_util.c
diff --git a/drivers/gpu/drm/msm/Makefile b/drivers/gpu/drm/msm/Makefile index 610d630..65d86ce 100644 --- a/drivers/gpu/drm/msm/Makefile +++ b/drivers/gpu/drm/msm/Makefile @@ -77,6 +77,8 @@ msm-y := \ disp/dpu1/dpu_plane.o \ disp/dpu1/dpu_rm.o \ disp/dpu1/dpu_vbif.o \ + disp/msm_disp_snapshot.o \ + disp/msm_disp_snapshot_util.o \ msm_atomic.o \ msm_atomic_tracepoints.o \ msm_debugfs.o \ diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h index 4dfd8a2..0f9f0a5 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h @@ -1,5 +1,5 @@ /* SPDX-License-Identifier: GPL-2.0-only */ -/* Copyright (c) 2015-2018, The Linux Foundation. All rights reserved. +/* Copyright (c) 2015-2018, 2020 The Linux Foundation. All rights reserved. */
#ifndef _DPU_HW_CATALOG_H diff --git a/drivers/gpu/drm/msm/disp/msm_disp_snapshot.c b/drivers/gpu/drm/msm/disp/msm_disp_snapshot.c new file mode 100644 index 0000000..70fd5a1 --- /dev/null +++ b/drivers/gpu/drm/msm/disp/msm_disp_snapshot.c @@ -0,0 +1,161 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2020-2021, The Linux Foundation. All rights reserved. + */ + +#define pr_fmt(fmt) "[drm:%s:%d] " fmt, __func__, __LINE__ + +#include "msm_disp_snapshot.h" + +#ifdef CONFIG_DEV_COREDUMP +static ssize_t disp_devcoredump_read(char *buffer, loff_t offset, + size_t count, void *data, size_t datalen) +{ + struct drm_print_iterator iter; + struct drm_printer p; + struct msm_disp_state *disp_state; + + disp_state = data; + + iter.data = buffer; + iter.offset = 0; + iter.start = offset; + iter.remain = count; + + p = drm_coredump_printer(&iter); + + msm_disp_state_print(disp_state, &p); + + return count - iter.remain; +} + +static void disp_devcoredump_free(void *data) +{ + struct msm_disp_state *disp_state; + + disp_state = data; + + msm_disp_state_free(disp_state); + + disp_state->coredump_pending = false; +} +#endif /* CONFIG_DEV_COREDUMP */ + +static void _msm_disp_snapshot_work(struct kthread_work *work) +{ + struct msm_disp_state *disp_state = container_of(work, struct msm_disp_state, dump_work); + struct drm_printer p; + + mutex_lock(&disp_state->mutex); + + msm_disp_snapshot_capture_state(disp_state); + + if (MSM_DISP_SNAPSHOT_DUMP_IN_CONSOLE) { + p = drm_info_printer(disp_state->drm_dev->dev); + msm_disp_state_print(disp_state, &p); + } + + /* + * if devcoredump is not defined free the state immediately + * otherwise it will be freed in the free handler. + */ +#ifdef CONFIG_DEV_COREDUMP + dev_coredumpm(disp_state->dev, THIS_MODULE, disp_state, 0, GFP_KERNEL, + disp_devcoredump_read, disp_devcoredump_free); + disp_state->coredump_pending = true; +#else + msm_disp_state_free(disp_state); +#endif + + mutex_unlock(&disp_state->mutex); +} + +void msm_disp_snapshot_state(struct drm_device *drm_dev) +{ + struct msm_drm_private *priv; + struct msm_kms *kms; + struct msm_disp_state *disp_state; + + if (!drm_dev) { + DRM_ERROR("invalid params\n"); + return; + } + + priv = drm_dev->dev_private; + kms = priv->kms; + disp_state = kms->disp_state; + + if (!disp_state) { + DRM_ERROR("invalid params\n"); + return; + } + + /* + * if there is a coredump pending return immediately till dump + * if read by userspace or timeout happens + */ + if (disp_state->coredump_pending) { + DRM_DEBUG("coredump is pending read\n"); + return; + } + + kthread_queue_work(disp_state->dump_worker, + &disp_state->dump_work); +} + +int msm_disp_snapshot_init(struct drm_device *drm_dev) +{ + struct msm_drm_private *priv; + struct msm_disp_state *disp_state; + struct msm_kms *kms; + + if (!drm_dev) { + DRM_ERROR("invalid params\n"); + return -EINVAL; + } + + priv = drm_dev->dev_private; + kms = priv->kms; + + disp_state = devm_kzalloc(drm_dev->dev, sizeof(struct msm_disp_state), GFP_KERNEL); + + mutex_init(&disp_state->mutex); + + disp_state->dev = drm_dev->dev; + disp_state->drm_dev = drm_dev; + + INIT_LIST_HEAD(&disp_state->blocks); + + disp_state->dump_worker = kthread_create_worker(0, "%s", "disp_snapshot"); + if (IS_ERR(disp_state->dump_worker)) + DRM_ERROR("failed to create disp state task\n"); + + kthread_init_work(&disp_state->dump_work, _msm_disp_snapshot_work); + + kms->disp_state = disp_state; + + return 0; +} + +void msm_disp_snapshot_destroy(struct drm_device *drm_dev) +{ + struct msm_kms *kms; + struct msm_drm_private *priv; + struct msm_disp_state *disp_state; + + if (!drm_dev) { + DRM_ERROR("invalid params\n"); + return; + } + + priv = drm_dev->dev_private; + kms = priv->kms; + disp_state = kms->disp_state; + + if (disp_state->dump_worker) + kthread_destroy_worker(disp_state->dump_worker); + + list_del(&disp_state->blocks); + + mutex_destroy(&disp_state->mutex); +} diff --git a/drivers/gpu/drm/msm/disp/msm_disp_snapshot.h b/drivers/gpu/drm/msm/disp/msm_disp_snapshot.h new file mode 100644 index 0000000..11dfa57 --- /dev/null +++ b/drivers/gpu/drm/msm/disp/msm_disp_snapshot.h @@ -0,0 +1,153 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (c) 2020-2021, The Linux Foundation. All rights reserved. + */ + +#ifndef MSM_DISP_SNAPSHOT_H_ +#define MSM_DISP_SNAPSHOT_H_ + +#include <drm/drm_atomic_helper.h> +#include <drm/drm_device.h> +#include "../../../drm_crtc_internal.h" +#include <drm/drm_print.h> +#include <drm/drm_atomic.h> +#include <linux/debugfs.h> +#include <linux/list.h> +#include <linux/delay.h> +#include <linux/spinlock.h> +#include <linux/ktime.h> +#include <linux/debugfs.h> +#include <linux/uaccess.h> +#include <linux/dma-buf.h> +#include <linux/slab.h> +#include <linux/list_sort.h> +#include <linux/pm.h> +#include <linux/pm_runtime.h> +#include <linux/kthread.h> +#include <linux/devcoredump.h> +#include <stdarg.h> +#include "msm_kms.h" + +#define MSM_DISP_SNAPSHOT_MAX_BLKS 10 + +/* debug option to print the registers in logs */ +#define MSM_DISP_SNAPSHOT_DUMP_IN_CONSOLE 0 + +/* print debug ranges in groups of 4 u32s */ +#define REG_DUMP_ALIGN 16 + +/** + * struct msm_disp_state - structure to store current dpu state + * @dev: device pointer + * @drm_dev: drm device pointer + * @mutex: mutex to serialize access to serialze dumps, debugfs access + * @coredump_pending: coredump is pending read from userspace + * @atomic_state: atomic state duplicated at the time of the error + * @dump_worker: kworker thread which runs the dump work + * @dump_work: kwork which dumps the registers and drm state + * @timestamp: timestamp at which the coredump was captured + */ +struct msm_disp_state { + struct device *dev; + struct drm_device *drm_dev; + struct mutex mutex; + + bool coredump_pending; + + struct list_head blocks; + + struct drm_atomic_state *atomic_state; + + struct kthread_worker *dump_worker; + struct kthread_work dump_work; + ktime_t timestamp; +}; + +/** + * struct msm_disp_state_block - structure to store each hardware block state + * @name: name of the block + * @drm_dev: handle to the linked list head + * @size: size of the register space of this hardware block + * @state: array holding the register dump of this hardware block + * @base_addr: starting address of this hardware block's register space + */ +struct msm_disp_state_block { + char name[SZ_128]; + struct list_head node; + unsigned int size; + u32 *state; + void __iomem *base_addr; +}; + +/** + * msm_disp_snapshot_init - initialize display snapshot + * @drm_dev: drm device handle + * + * Returns: 0 or -ERROR + */ +int msm_disp_snapshot_init(struct drm_device *drm_dev); + +/** + * msm_disp_snapshot_destroy - destroy the display snapshot + * @drm_dev: drm device handle + * + * Returns: none + */ +void msm_disp_snapshot_destroy(struct drm_device *drm_dev); + +/** + * msm_disp_snapshot_state - trigger to dump the display snapshot + * @drm_dev: handle to drm device + + * Returns: none + */ +void msm_disp_snapshot_state(struct drm_device *drm_dev); + +/** + * msm_disp_state_get - get the handle to msm_disp_state struct from the drm device + * @drm: handle to drm device + + * Returns: handle to the msm_disp_state struct + */ +struct msm_disp_state *msm_disp_state_get(struct drm_device *drm); + +/** + * msm_disp_state_print - print out the current dpu state + * @disp_state: handle to drm device + * @p: handle to drm printer + * + * Returns: none + */ +void msm_disp_state_print(struct msm_disp_state *disp_state, struct drm_printer *p); + +/** + * msm_disp_snapshot_capture_state - utility to capture atomic state and hw registers + * @disp_state: handle to msm_disp_state struct + + * Returns: none + */ +void msm_disp_snapshot_capture_state(struct msm_disp_state *disp_state); + +/** + * msm_disp_state_free - free the memory after the coredump has been read + * @disp_state: handle to struct msm_disp_state + + * Returns: none + */ +void msm_disp_state_free(struct msm_disp_state *disp_state); + +/** + * msm_disp_snapshot_add_block - add a hardware block with its register dump + * @disp_state: handle to struct msm_disp_state + * @name: name of the hardware block + * @len: size of the register space of the hardware block + * @base_addr: starting address of the register space of the hardware block + * @fmt: format in which the block names need to be printed + * + * Returns: none + */ +__printf(4, 5) +void msm_disp_snapshot_add_block(struct msm_disp_state *disp_state, u32 len, + void __iomem *base_addr, const char *fmt, ...); + +#endif /* MSM_DISP_SNAPSHOT_H_ */ diff --git a/drivers/gpu/drm/msm/disp/msm_disp_snapshot_util.c b/drivers/gpu/drm/msm/disp/msm_disp_snapshot_util.c new file mode 100644 index 0000000..024ca49 --- /dev/null +++ b/drivers/gpu/drm/msm/disp/msm_disp_snapshot_util.c @@ -0,0 +1,179 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2020-2021, The Linux Foundation. All rights reserved. + */ + +#define pr_fmt(fmt) "[drm:%s:%d] " fmt, __func__, __LINE__ + +#include "msm_disp_snapshot.h" + +static void msm_disp_state_dump_regs(u32 **reg, u32 aligned_len, void __iomem *base_addr) +{ + u32 len_padded; + u32 num_rows; + u32 x0, x4, x8, xc; + void __iomem *addr; + u32 *dump_addr = NULL; + void __iomem *end_addr; + int i; + + len_padded = aligned_len * REG_DUMP_ALIGN; + num_rows = aligned_len / REG_DUMP_ALIGN; + + addr = base_addr; + end_addr = base_addr + aligned_len; + + if (!(*reg)) + *reg = kzalloc(len_padded, GFP_KERNEL); + + if (*reg) + dump_addr = *reg; + + for (i = 0; i < num_rows; i++) { + x0 = (addr < end_addr) ? readl_relaxed(addr + 0x0) : 0; + x4 = (addr + 0x4 < end_addr) ? readl_relaxed(addr + 0x4) : 0; + x8 = (addr + 0x8 < end_addr) ? readl_relaxed(addr + 0x8) : 0; + xc = (addr + 0xc < end_addr) ? readl_relaxed(addr + 0xc) : 0; + + if (dump_addr) { + dump_addr[i * 4] = x0; + dump_addr[i * 4 + 1] = x4; + dump_addr[i * 4 + 2] = x8; + dump_addr[i * 4 + 3] = xc; + } + + addr += REG_DUMP_ALIGN; + } +} + +static void msm_disp_state_print_regs(u32 **reg, u32 len, void __iomem *base_addr, + struct drm_printer *p) +{ + int i; + u32 *dump_addr = NULL; + void __iomem *addr; + u32 num_rows; + + addr = base_addr; + num_rows = len / REG_DUMP_ALIGN; + + if (*reg) + dump_addr = *reg; + + for (i = 0; i < num_rows; i++) { + drm_printf(p, "0x%lx : %08x %08x %08x %08x\n", + (unsigned long)(addr - base_addr), + dump_addr[i * 4], dump_addr[i * 4 + 1], + dump_addr[i * 4 + 2], dump_addr[i * 4 + 3]); + addr += REG_DUMP_ALIGN; + } +} + +struct msm_disp_state *msm_disp_state_get(struct drm_device *drm) +{ + struct msm_drm_private *priv; + struct msm_kms *kms; + + priv = drm->dev_private; + kms = priv->kms; + + return kms->disp_state; +} + +void msm_disp_state_print(struct msm_disp_state *state, struct drm_printer *p) +{ + struct msm_disp_state_block *block, *tmp; + + if (!p) { + DRM_ERROR("invalid drm printer\n"); + return; + } + + drm_printf(p, "---\n"); + + drm_printf(p, "module: " KBUILD_MODNAME "\n"); + drm_printf(p, "dpu devcoredump\n"); + drm_printf(p, "timestamp %lld\n", ktime_to_ns(state->timestamp)); + + list_for_each_entry_safe(block, tmp, &state->blocks, node) { + drm_printf(p, "====================%s================\n", block->name); + msm_disp_state_print_regs(&block->state, block->size, block->base_addr, p); + } + + drm_printf(p, "===================dpu drm state================\n"); + + if (state->atomic_state) + drm_atomic_print_new_state(state->atomic_state, p); +} + +static void msm_disp_capture_atomic_state(struct msm_disp_state *disp_state) +{ + struct drm_device *ddev; + struct drm_modeset_acquire_ctx ctx; + + disp_state->timestamp = ktime_get(); + + ddev = disp_state->drm_dev; + + drm_modeset_acquire_init(&ctx, 0); + + while (drm_modeset_lock_all_ctx(ddev, &ctx) != 0) + drm_modeset_backoff(&ctx); + + disp_state->atomic_state = drm_atomic_helper_duplicate_state(ddev, + &ctx); + drm_modeset_drop_locks(&ctx); + drm_modeset_acquire_fini(&ctx); +} + +void msm_disp_snapshot_capture_state(struct msm_disp_state *disp_state) +{ + struct msm_drm_private *priv; + struct drm_device *drm_dev; + + drm_dev = disp_state->drm_dev; + priv = drm_dev->dev_private; + + msm_disp_capture_atomic_state(disp_state); +} + +void msm_disp_state_free(struct msm_disp_state *disp_state) +{ + struct msm_disp_state_block *block, *tmp; + + if (disp_state->atomic_state) { + drm_atomic_state_put(disp_state->atomic_state); + disp_state->atomic_state = NULL; + } + + list_for_each_entry_safe(block, tmp, &disp_state->blocks, node) { + list_del(&block->node); + kfree(block->state); + kfree(block); + } +} + +void msm_disp_snapshot_add_block(struct msm_disp_state *disp_state, u32 len, + void __iomem *base_addr, const char *fmt, ...) +{ + struct msm_disp_state_block *new_blk; + struct va_format vaf; + va_list va; + + new_blk = kzalloc(sizeof(struct msm_disp_state_block), GFP_KERNEL); + + va_start(va, fmt); + + vaf.fmt = fmt; + vaf.va = &va; + snprintf(new_blk->name, sizeof(new_blk->name), "%pV", &vaf); + + va_end(va); + + INIT_LIST_HEAD(&new_blk->node); + new_blk->size = ALIGN(len, REG_DUMP_ALIGN); + new_blk->base_addr = base_addr; + + msm_disp_state_dump_regs(&new_blk->state, new_blk->size, base_addr); + list_add(&new_blk->node, &disp_state->blocks); +} diff --git a/drivers/gpu/drm/msm/dp/dp_display.h b/drivers/gpu/drm/msm/dp/dp_display.h index 6092ba1..4d39373 100644 --- a/drivers/gpu/drm/msm/dp/dp_display.h +++ b/drivers/gpu/drm/msm/dp/dp_display.h @@ -8,6 +8,7 @@
#include "dp_panel.h" #include <sound/hdmi-codec.h> +#include "disp/msm_disp_snapshot.h"
struct msm_dp { struct drm_device *drm_dev; diff --git a/drivers/gpu/drm/msm/dsi/dsi.c b/drivers/gpu/drm/msm/dsi/dsi.c index 62704885..f68f34b 100644 --- a/drivers/gpu/drm/msm/dsi/dsi.c +++ b/drivers/gpu/drm/msm/dsi/dsi.c @@ -266,3 +266,4 @@ int msm_dsi_modeset_init(struct msm_dsi *msm_dsi, struct drm_device *dev, return ret; }
+ diff --git a/drivers/gpu/drm/msm/dsi/dsi_host.c b/drivers/gpu/drm/msm/dsi/dsi_host.c index 8a10e43..316e78d 100644 --- a/drivers/gpu/drm/msm/dsi/dsi_host.c +++ b/drivers/gpu/drm/msm/dsi/dsi_host.c @@ -2487,3 +2487,4 @@ struct drm_bridge *msm_dsi_host_get_bridge(struct mipi_dsi_host *host)
return of_drm_find_bridge(msm_host->device_node); } + diff --git a/drivers/gpu/drm/msm/msm_drv.c b/drivers/gpu/drm/msm/msm_drv.c index e1104d2..92fe844 100644 --- a/drivers/gpu/drm/msm/msm_drv.c +++ b/drivers/gpu/drm/msm/msm_drv.c @@ -1,6 +1,6 @@ // SPDX-License-Identifier: GPL-2.0-only /* - * Copyright (c) 2016-2018, The Linux Foundation. All rights reserved. + * Copyright (c) 2016-2018, 2020-2021 The Linux Foundation. All rights reserved. * Copyright (C) 2013 Red Hat * Author: Rob Clark robdclark@gmail.com */ @@ -19,6 +19,7 @@ #include <drm/drm_of.h> #include <drm/drm_vblank.h>
+#include "disp/msm_disp_snapshot.h" #include "msm_drv.h" #include "msm_debugfs.h" #include "msm_fence.h" @@ -167,6 +168,24 @@ void __iomem *msm_ioremap_quiet(struct platform_device *pdev, const char *name, return _msm_ioremap(pdev, name, dbgname, true); }
+unsigned long msm_iomap_size(struct platform_device *pdev, const char *name) +{ + struct resource *res; + + if (name) + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, name); + else + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + + if (!res) { + dev_dbg(&pdev->dev, "failed to get memory resource: %s\n", + name); + return 0; + } + + return resource_size(res); +} + void msm_writel(u32 data, void __iomem *addr) { if (reglog) @@ -278,6 +297,8 @@ static int msm_drm_uninit(struct device *dev) msm_fbdev_free(ddev); #endif
+ msm_disp_snapshot_destroy(ddev); + drm_mode_config_cleanup(ddev);
pm_runtime_get_sync(dev); @@ -550,6 +571,10 @@ static int msm_drm_init(struct device *dev, const struct drm_driver *drv) if (ret) goto err_msm_uninit;
+ ret = msm_disp_snapshot_init(ddev); + if (ret) + DRM_DEV_ERROR(dev, "msm_disp_snapshot_init failed ret = %d\n", ret); + drm_mode_config_reset(ddev);
#ifdef CONFIG_DRM_FBDEV_EMULATION diff --git a/drivers/gpu/drm/msm/msm_drv.h b/drivers/gpu/drm/msm/msm_drv.h index 2668941..ac206c1 100644 --- a/drivers/gpu/drm/msm/msm_drv.h +++ b/drivers/gpu/drm/msm/msm_drv.h @@ -450,6 +450,7 @@ void __iomem *msm_ioremap(struct platform_device *pdev, const char *name, const char *dbgname); void __iomem *msm_ioremap_quiet(struct platform_device *pdev, const char *name, const char *dbgname); +unsigned long msm_iomap_size(struct platform_device *pdev, const char *name); void msm_writel(u32 data, void __iomem *addr); u32 msm_readl(const void __iomem *addr); void msm_rmw(void __iomem *addr, u32 mask, u32 or); diff --git a/drivers/gpu/drm/msm/msm_kms.h b/drivers/gpu/drm/msm/msm_kms.h index d8151a8..d84bfda 100644 --- a/drivers/gpu/drm/msm/msm_kms.h +++ b/drivers/gpu/drm/msm/msm_kms.h @@ -152,6 +152,9 @@ struct msm_kms { /* mapper-id used to request GEM buffer mapped for scanout: */ struct msm_gem_address_space *aspace;
+ /* handle to disp snapshot state */ + struct msm_disp_state *disp_state; + /* * For async commit, where ->flush_commit() and later happens * from the crtc's pending_timer close to end of the frame:
Add an API to take a snapshot of DSI controller registers. This API will be used by the msm_disp_snapshot module to capture the DSI snapshot.
Signed-off-by: Abhinav Kumar abhinavk@codeaurora.org --- drivers/gpu/drm/msm/dsi/dsi.c | 4 ++++ drivers/gpu/drm/msm/dsi/dsi.h | 5 ++++- drivers/gpu/drm/msm/dsi/dsi_host.c | 15 +++++++++++++++ 3 files changed, 23 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/msm/dsi/dsi.c b/drivers/gpu/drm/msm/dsi/dsi.c index f68f34b..bccc006 100644 --- a/drivers/gpu/drm/msm/dsi/dsi.c +++ b/drivers/gpu/drm/msm/dsi/dsi.c @@ -266,4 +266,8 @@ int msm_dsi_modeset_init(struct msm_dsi *msm_dsi, struct drm_device *dev, return ret; }
+void msm_dsi_snapshot(struct msm_dsi *msm_dsi) +{ + msm_dsi_host_snapshot(msm_dsi->host); +}
diff --git a/drivers/gpu/drm/msm/dsi/dsi.h b/drivers/gpu/drm/msm/dsi/dsi.h index 7abfeab..e26223c 100644 --- a/drivers/gpu/drm/msm/dsi/dsi.h +++ b/drivers/gpu/drm/msm/dsi/dsi.h @@ -15,6 +15,7 @@ #include <drm/drm_panel.h>
#include "msm_drv.h" +#include "disp/msm_disp_snapshot.h"
#define DSI_0 0 #define DSI_1 1 @@ -90,6 +91,8 @@ static inline bool msm_dsi_device_connected(struct msm_dsi *msm_dsi) return msm_dsi->panel || msm_dsi->external_bridge; }
+void msm_dsi_snapshot(struct msm_dsi *msm_dsi); + struct drm_encoder *msm_dsi_get_encoder(struct msm_dsi *msm_dsi);
/* dsi host */ @@ -146,7 +149,7 @@ int dsi_clk_init_v2(struct msm_dsi_host *msm_host); int dsi_clk_init_6g_v2(struct msm_dsi_host *msm_host); int dsi_calc_clk_rate_v2(struct msm_dsi_host *msm_host, bool is_dual_dsi); int dsi_calc_clk_rate_6g(struct msm_dsi_host *msm_host, bool is_dual_dsi); - +void msm_dsi_host_snapshot(struct mipi_dsi_host *host); /* dsi phy */ struct msm_dsi_phy; struct msm_dsi_phy_shared_timings { diff --git a/drivers/gpu/drm/msm/dsi/dsi_host.c b/drivers/gpu/drm/msm/dsi/dsi_host.c index 316e78d..899b6fc 100644 --- a/drivers/gpu/drm/msm/dsi/dsi_host.c +++ b/drivers/gpu/drm/msm/dsi/dsi_host.c @@ -2488,3 +2488,18 @@ struct drm_bridge *msm_dsi_host_get_bridge(struct mipi_dsi_host *host) return of_drm_find_bridge(msm_host->device_node); }
+void msm_dsi_host_snapshot(struct mipi_dsi_host *host) +{ + struct msm_dsi_host *msm_host = to_msm_dsi_host(host); + struct drm_device *dev = msm_host->dev; + struct msm_disp_state *disp_state; + + disp_state = msm_disp_state_get(dev); + + pm_runtime_get_sync(&msm_host->pdev->dev); + + msm_disp_snapshot_add_block(disp_state, msm_iomap_size(msm_host->pdev, "dsi_ctrl"), + msm_host->ctrl_base, "dsi%d_ctrl", msm_host->id); + + pm_runtime_put_sync(&msm_host->pdev->dev); +}
Add an API to take a snapshot of DP controller registers. This API will be used by the msm_disp_snapshot module to capture the DP snapshot.
Signed-off-by: Abhinav Kumar abhinavk@codeaurora.org --- drivers/gpu/drm/msm/dp/dp_catalog.c | 9 +++++++++ drivers/gpu/drm/msm/dp/dp_catalog.h | 4 ++++ drivers/gpu/drm/msm/dp/dp_display.c | 29 +++++++++++++++++++++++++++++ drivers/gpu/drm/msm/msm_drv.h | 1 + 4 files changed, 43 insertions(+)
diff --git a/drivers/gpu/drm/msm/dp/dp_catalog.c b/drivers/gpu/drm/msm/dp/dp_catalog.c index b1a9b1b..99f4fd8 100644 --- a/drivers/gpu/drm/msm/dp/dp_catalog.c +++ b/drivers/gpu/drm/msm/dp/dp_catalog.c @@ -62,6 +62,15 @@ struct dp_catalog_private { u8 aux_lut_cfg_index[PHY_AUX_CFG_MAX]; };
+void dp_catalog_snapshot(struct dp_catalog *dp_catalog, struct msm_disp_state *disp_state) +{ + struct dp_catalog_private *catalog = container_of(dp_catalog, + struct dp_catalog_private, dp_catalog); + + msm_disp_snapshot_add_block(disp_state, catalog->io->dp_controller.len, + catalog->io->dp_controller.base, "dp_ctrl"); +} + static inline u32 dp_read_aux(struct dp_catalog_private *catalog, u32 offset) { offset += MSM_DP_CONTROLLER_AUX_OFFSET; diff --git a/drivers/gpu/drm/msm/dp/dp_catalog.h b/drivers/gpu/drm/msm/dp/dp_catalog.h index 176a902..e7e8b13 100644 --- a/drivers/gpu/drm/msm/dp/dp_catalog.h +++ b/drivers/gpu/drm/msm/dp/dp_catalog.h @@ -9,6 +9,7 @@ #include <drm/drm_modes.h>
#include "dp_parser.h" +#include "disp/msm_disp_snapshot.h"
/* interrupts */ #define DP_INTR_HPD BIT(0) @@ -71,6 +72,9 @@ struct dp_catalog { u32 audio_data; };
+/* Debug module */ +void dp_catalog_snapshot(struct dp_catalog *dp_catalog, struct msm_disp_state *disp_state); + /* AUX APIs */ u32 dp_catalog_aux_read_data(struct dp_catalog *dp_catalog); int dp_catalog_aux_write_data(struct dp_catalog *dp_catalog); diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c index 5a39da6..6670558 100644 --- a/drivers/gpu/drm/msm/dp/dp_display.c +++ b/drivers/gpu/drm/msm/dp/dp_display.c @@ -1009,6 +1009,35 @@ int dp_display_get_test_bpp(struct msm_dp *dp) dp_display->link->test_video.test_bit_depth); }
+void msm_dp_snapshot(struct msm_dp *dp) +{ + struct dp_display_private *dp_display; + struct drm_device *drm; + struct msm_disp_state *disp_state; + + dp_display = container_of(dp, struct dp_display_private, dp_display); + drm = dp->drm_dev; + disp_state = msm_disp_state_get(drm); + + /* + * if we are reading registers we need the link clocks to be on + * however till DP cable is connected this will not happen as we + * do not know the resolution to power up with. Hence check the + * power_on status before dumping DP registers to avoid crash due + * to unclocked access + */ + mutex_lock(&dp_display->event_mutex); + + if (!dp->power_on) { + mutex_unlock(&dp_display->event_mutex); + return; + } + + dp_catalog_snapshot(dp_display->catalog, disp_state); + + mutex_unlock(&dp_display->event_mutex); +} + static void dp_display_config_hpd(struct dp_display_private *dp) {
diff --git a/drivers/gpu/drm/msm/msm_drv.h b/drivers/gpu/drm/msm/msm_drv.h index ac206c1..9c40bac 100644 --- a/drivers/gpu/drm/msm/msm_drv.h +++ b/drivers/gpu/drm/msm/msm_drv.h @@ -367,6 +367,7 @@ void msm_dp_display_mode_set(struct msm_dp *dp, struct drm_encoder *encoder, struct drm_display_mode *mode, struct drm_display_mode *adjusted_mode); void msm_dp_irq_postinstall(struct msm_dp *dp_display); +void msm_dp_snapshot(struct msm_dp *dp_display);
void msm_dp_debugfs_init(struct msm_dp *dp_display, struct drm_minor *minor);
Add an API to take a snapshot of DPU controller registers. This API will be used by the msm_disp_snapshot module to capture the DPU snapshot.
Signed-off-by: Abhinav Kumar abhinavk@codeaurora.org --- drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c | 50 +++++++++++++++++++++++++++++++++ drivers/gpu/drm/msm/msm_kms.h | 4 +++ 2 files changed, 54 insertions(+)
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c index 88e9cc3..ead2478 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c @@ -19,6 +19,7 @@ #include "msm_drv.h" #include "msm_mmu.h" #include "msm_gem.h" +#include "disp/msm_disp_snapshot.h"
#include "dpu_kms.h" #include "dpu_core_irq.h" @@ -798,6 +799,54 @@ static void dpu_irq_uninstall(struct msm_kms *kms) dpu_core_irq_uninstall(dpu_kms); }
+static void dpu_kms_mdp_snapshot(struct msm_kms *kms) +{ + int i; + struct dpu_kms *dpu_kms; + struct dpu_mdss_cfg *cat; + struct dpu_hw_mdp *top; + struct msm_disp_state *disp_state; + + disp_state = kms->disp_state; + + dpu_kms = to_dpu_kms(kms); + + cat = dpu_kms->catalog; + top = dpu_kms->hw_mdp; + + pm_runtime_get_sync(&dpu_kms->pdev->dev); + + /* dump CTL sub-blocks HW regs info */ + for (i = 0; i < cat->ctl_count; i++) + msm_disp_snapshot_add_block(disp_state, cat->ctl[i].len, + dpu_kms->mmio + cat->ctl[i].base, "ctl_%d", i); + + /* dump DSPP sub-blocks HW regs info */ + for (i = 0; i < cat->dspp_count; i++) + msm_disp_snapshot_add_block(disp_state, cat->dspp[i].len, + dpu_kms->mmio + cat->dspp[i].base, "dspp_%d", i); + + /* dump INTF sub-blocks HW regs info */ + for (i = 0; i < cat->intf_count; i++) + msm_disp_snapshot_add_block(disp_state, cat->intf[i].len, + dpu_kms->mmio + cat->intf[i].base, "intf_%d", i); + + /* dump PP sub-blocks HW regs info */ + for (i = 0; i < cat->pingpong_count; i++) + msm_disp_snapshot_add_block(disp_state, cat->pingpong[i].len, + dpu_kms->mmio + cat->pingpong[i].base, "pingpong_%d", i); + + /* dump SSPP sub-blocks HW regs info */ + for (i = 0; i < cat->sspp_count; i++) + msm_disp_snapshot_add_block(disp_state, cat->sspp[i].len, + dpu_kms->mmio + cat->sspp[i].base, "sspp_%d", i); + + msm_disp_snapshot_add_block(disp_state, top->hw.length, + dpu_kms->mmio + top->hw.blk_off, "top"); + + pm_runtime_put_sync(&dpu_kms->pdev->dev); +} + static const struct msm_kms_funcs kms_funcs = { .hw_init = dpu_kms_hw_init, .irq_preinstall = dpu_irq_preinstall, @@ -818,6 +867,7 @@ static const struct msm_kms_funcs kms_funcs = { .round_pixclk = dpu_kms_round_pixclk, .destroy = dpu_kms_destroy, .set_encoder_mode = _dpu_kms_set_encoder_mode, + .snapshot = dpu_kms_mdp_snapshot, #ifdef CONFIG_DEBUG_FS .debugfs_init = dpu_kms_debugfs_init, #endif diff --git a/drivers/gpu/drm/msm/msm_kms.h b/drivers/gpu/drm/msm/msm_kms.h index d84bfda..b31fdad 100644 --- a/drivers/gpu/drm/msm/msm_kms.h +++ b/drivers/gpu/drm/msm/msm_kms.h @@ -122,6 +122,10 @@ struct msm_kms_funcs { bool cmd_mode); /* cleanup: */ void (*destroy)(struct msm_kms *kms); + + /* snapshot: */ + void (*snapshot)(struct msm_kms *kms); + #ifdef CONFIG_DEBUG_FS /* debugfs: */ int (*debugfs_init)(struct msm_kms *kms, struct drm_minor *minor);
Add support to take the register snapshot of dsi, dp and dpu modules.
Signed-off-by: Abhinav Kumar abhinavk@codeaurora.org --- drivers/gpu/drm/msm/disp/msm_disp_snapshot.h | 1 + drivers/gpu/drm/msm/disp/msm_disp_snapshot_util.c | 16 ++++++++++++++++ 2 files changed, 17 insertions(+)
diff --git a/drivers/gpu/drm/msm/disp/msm_disp_snapshot.h b/drivers/gpu/drm/msm/disp/msm_disp_snapshot.h index 11dfa57..7e075e7 100644 --- a/drivers/gpu/drm/msm/disp/msm_disp_snapshot.h +++ b/drivers/gpu/drm/msm/disp/msm_disp_snapshot.h @@ -27,6 +27,7 @@ #include <linux/devcoredump.h> #include <stdarg.h> #include "msm_kms.h" +#include "dsi.h"
#define MSM_DISP_SNAPSHOT_MAX_BLKS 10
diff --git a/drivers/gpu/drm/msm/disp/msm_disp_snapshot_util.c b/drivers/gpu/drm/msm/disp/msm_disp_snapshot_util.c index 024ca49..44dc682 100644 --- a/drivers/gpu/drm/msm/disp/msm_disp_snapshot_util.c +++ b/drivers/gpu/drm/msm/disp/msm_disp_snapshot_util.c @@ -130,9 +130,25 @@ void msm_disp_snapshot_capture_state(struct msm_disp_state *disp_state) { struct msm_drm_private *priv; struct drm_device *drm_dev; + struct msm_kms *kms; + int i;
drm_dev = disp_state->drm_dev; priv = drm_dev->dev_private; + kms = priv->kms; + + if (priv->dp) + msm_dp_snapshot(priv->dp); + + for (i = 0; i < ARRAY_SIZE(priv->dsi); i++) { + if (!priv->dsi[i]) + continue; + + msm_dsi_snapshot(priv->dsi[i]); + } + + if (kms->funcs->snapshot) + kms->funcs->snapshot(kms);
msm_disp_capture_atomic_state(disp_state); }
Add snapshot points across dpu driver to trigger dumps when critical errors are hit.
changes in v5: - change the callers to use the snapshot function directly
Signed-off-by: Abhinav Kumar abhinavk@codeaurora.org --- drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c | 16 +++++++++++++--- drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c | 14 +++++++++----- drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_vid.c | 8 +++++++- 3 files changed, 29 insertions(+), 9 deletions(-)
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c index 8d94205..f1642de 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c @@ -1,6 +1,6 @@ // SPDX-License-Identifier: GPL-2.0-only /* - * Copyright (c) 2014-2018, The Linux Foundation. All rights reserved. + * Copyright (c) 2014-2018, 2020-2021 The Linux Foundation. All rights reserved. * Copyright (C) 2013 Red Hat * Author: Rob Clark robdclark@gmail.com */ @@ -26,6 +26,7 @@ #include "dpu_crtc.h" #include "dpu_trace.h" #include "dpu_core_irq.h" +#include "disp/msm_disp_snapshot.h"
#define DPU_DEBUG_ENC(e, fmt, ...) DPU_DEBUG("enc%d " fmt,\ (e) ? (e)->base.base.id : -1, ##__VA_ARGS__) @@ -1336,6 +1337,11 @@ static void dpu_encoder_underrun_callback(struct drm_encoder *drm_enc,
DPU_ATRACE_BEGIN("encoder_underrun_callback"); atomic_inc(&phy_enc->underrun_cnt); + + /* trigger dump only on the first underrun */ + if (atomic_read(&phy_enc->underrun_cnt) == 1) + msm_disp_snapshot_state(drm_enc->dev); + trace_dpu_enc_underrun_cb(DRMID(drm_enc), atomic_read(&phy_enc->underrun_cnt)); DPU_ATRACE_END("encoder_underrun_callback"); @@ -1565,19 +1571,23 @@ static void dpu_encoder_helper_hw_reset(struct dpu_encoder_phys *phys_enc) struct dpu_encoder_virt *dpu_enc; struct dpu_hw_ctl *ctl; int rc; + struct drm_encoder *drm_enc;
dpu_enc = to_dpu_encoder_virt(phys_enc->parent); ctl = phys_enc->hw_ctl; + drm_enc = phys_enc->parent;
if (!ctl->ops.reset) return;
- DRM_DEBUG_KMS("id:%u ctl %d reset\n", DRMID(phys_enc->parent), + DRM_DEBUG_KMS("id:%u ctl %d reset\n", DRMID(drm_enc), ctl->idx);
rc = ctl->ops.reset(ctl); - if (rc) + if (rc) { DPU_ERROR_ENC(dpu_enc, "ctl %d reset failure\n", ctl->idx); + msm_disp_snapshot_state(drm_enc->dev); + }
phys_enc->enable_state = DPU_ENC_ENABLED; } diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c index b2be39b..9999a73 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c @@ -1,6 +1,6 @@ // SPDX-License-Identifier: GPL-2.0-only /* - * Copyright (c) 2015-2018 The Linux Foundation. All rights reserved. + * Copyright (c) 2015-2018, 2020-2021 The Linux Foundation. All rights reserved. */
#define pr_fmt(fmt) "[drm:%s:%d] " fmt, __func__, __LINE__ @@ -11,6 +11,7 @@ #include "dpu_core_irq.h" #include "dpu_formats.h" #include "dpu_trace.h" +#include "disp/msm_disp_snapshot.h"
#define DPU_DEBUG_CMDENC(e, fmt, ...) DPU_DEBUG("enc%d intf%d " fmt, \ (e) && (e)->base.parent ? \ @@ -191,10 +192,13 @@ static int _dpu_encoder_phys_cmd_handle_ppdone_timeout( to_dpu_encoder_phys_cmd(phys_enc); u32 frame_event = DPU_ENCODER_FRAME_EVENT_ERROR; bool do_log = false; + struct drm_encoder *drm_enc;
if (!phys_enc->hw_pp) return -EINVAL;
+ drm_enc = phys_enc->parent; + cmd_enc->pp_timeout_report_cnt++; if (cmd_enc->pp_timeout_report_cnt == PP_TIMEOUT_MAX_TRIALS) { frame_event |= DPU_ENCODER_FRAME_EVENT_PANEL_DEAD; @@ -203,7 +207,7 @@ static int _dpu_encoder_phys_cmd_handle_ppdone_timeout( do_log = true; }
- trace_dpu_enc_phys_cmd_pdone_timeout(DRMID(phys_enc->parent), + trace_dpu_enc_phys_cmd_pdone_timeout(DRMID(drm_enc), phys_enc->hw_pp->idx - PINGPONG_0, cmd_enc->pp_timeout_report_cnt, atomic_read(&phys_enc->pending_kickoff_cnt), @@ -212,12 +216,12 @@ static int _dpu_encoder_phys_cmd_handle_ppdone_timeout( /* to avoid flooding, only log first time, and "dead" time */ if (do_log) { DRM_ERROR("id:%d pp:%d kickoff timeout %d cnt %d koff_cnt %d\n", - DRMID(phys_enc->parent), + DRMID(drm_enc), phys_enc->hw_pp->idx - PINGPONG_0, phys_enc->hw_ctl->idx - CTL_0, cmd_enc->pp_timeout_report_cnt, atomic_read(&phys_enc->pending_kickoff_cnt)); - + msm_disp_snapshot_state(drm_enc->dev); dpu_encoder_helper_unregister_irq(phys_enc, INTR_IDX_RDPTR); }
@@ -228,7 +232,7 @@ static int _dpu_encoder_phys_cmd_handle_ppdone_timeout(
if (phys_enc->parent_ops->handle_frame_done) phys_enc->parent_ops->handle_frame_done( - phys_enc->parent, phys_enc, frame_event); + drm_enc, phys_enc, frame_event);
return -ETIMEDOUT; } diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_vid.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_vid.c index 0e06b7e..fed019f 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_vid.c +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_vid.c @@ -1,5 +1,5 @@ // SPDX-License-Identifier: GPL-2.0-only -/* Copyright (c) 2015-2018, The Linux Foundation. All rights reserved. +/* Copyright (c) 2015-2018, 2020-2021 The Linux Foundation. All rights reserved. */
#define pr_fmt(fmt) "[drm:%s:%d] " fmt, __func__, __LINE__ @@ -9,6 +9,7 @@ #include "dpu_core_irq.h" #include "dpu_formats.h" #include "dpu_trace.h" +#include "disp/msm_disp_snapshot.h"
#define DPU_DEBUG_VIDENC(e, fmt, ...) DPU_DEBUG("enc%d intf%d " fmt, \ (e) && (e)->parent ? \ @@ -468,6 +469,7 @@ static void dpu_encoder_phys_vid_enable(struct dpu_encoder_phys *phys_enc) "update pending flush ctl %d intf %d\n", ctl->idx - CTL_0, phys_enc->hw_intf->idx);
+ atomic_set(&phys_enc->underrun_cnt, 0);
/* ctl_flush & timing engine enable will be triggered by framework */ if (phys_enc->enable_state == DPU_ENC_DISABLED) @@ -537,6 +539,9 @@ static void dpu_encoder_phys_vid_prepare_for_kickoff( { struct dpu_hw_ctl *ctl; int rc; + struct drm_encoder *drm_enc; + + drm_enc = phys_enc->parent;
ctl = phys_enc->hw_ctl; if (!ctl->ops.wait_reset_status) @@ -550,6 +555,7 @@ static void dpu_encoder_phys_vid_prepare_for_kickoff( if (rc) { DPU_ERROR_VIDENC(phys_enc, "ctl %d reset failure: %d\n", ctl->idx, rc); + msm_disp_snapshot_state(drm_enc->dev); dpu_encoder_helper_unregister_irq(phys_enc, INTR_IDX_VSYNC); } }
On 16/04/2021 23:57, Abhinav Kumar wrote:
This series adds support to use devcoredump for DPU driver. It introduces the msm_disp_snapshot module which assists in the capturing of register dumps during error scenarios. When a display related error happens, the msm_disp_snapshot module captures all the relevant register dumps along with the snapshot of the drm atomic state and triggers a devcoredump.
changes in v5:
- move the storage of disp_state from dpu_kms to msm_kms
- absorb snprintf into the snapshot core by accepting var args
- initialize disp snapshot module even for non-DPU targets
- split up the patches into dpu, dsi and dp pieces for easier review
- get rid of MSM_DISP_SNAPSHOT_IN_* macros by simplifying function
Abhinav Kumar (7): drm: allow drm_atomic_print_state() to accept any drm_printer drm/msm: add support to take dpu snapshot drm/msm/dsi: add API to take DSI register snapshot drm/msm/dp: add API to take DP register snapshot drm/msm/disp/dpu1: add API to take DPU register snapshot drm/msm: add support to take dsi, dp and dpu snapshot drm/msm: add disp snapshot points across dpu driver
All patches:
Reviewed-by: Dmitry Baryshkov dmitry.baryshkov@linaro.org
Thank you!
drivers/gpu/drm/drm_atomic.c | 28 ++- drivers/gpu/drm/drm_atomic_uapi.c | 4 +- drivers/gpu/drm/drm_crtc_internal.h | 4 +- drivers/gpu/drm/msm/Makefile | 2 + drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c | 16 +- .../gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c | 14 +- .../gpu/drm/msm/disp/dpu1/dpu_encoder_phys_vid.c | 8 +- drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h | 2 +- drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c | 50 ++++++ drivers/gpu/drm/msm/disp/msm_disp_snapshot.c | 161 +++++++++++++++++ drivers/gpu/drm/msm/disp/msm_disp_snapshot.h | 154 ++++++++++++++++ drivers/gpu/drm/msm/disp/msm_disp_snapshot_util.c | 195 +++++++++++++++++++++ drivers/gpu/drm/msm/dp/dp_catalog.c | 9 + drivers/gpu/drm/msm/dp/dp_catalog.h | 4 + drivers/gpu/drm/msm/dp/dp_display.c | 29 +++ drivers/gpu/drm/msm/dp/dp_display.h | 1 + drivers/gpu/drm/msm/dsi/dsi.c | 5 + drivers/gpu/drm/msm/dsi/dsi.h | 5 +- drivers/gpu/drm/msm/dsi/dsi_host.c | 16 ++ drivers/gpu/drm/msm/msm_drv.c | 27 ++- drivers/gpu/drm/msm/msm_drv.h | 2 + drivers/gpu/drm/msm/msm_kms.h | 7 + drivers/gpu/drm/selftests/test-drm_framebuffer.c | 1 + 23 files changed, 725 insertions(+), 19 deletions(-) create mode 100644 drivers/gpu/drm/msm/disp/msm_disp_snapshot.c create mode 100644 drivers/gpu/drm/msm/disp/msm_disp_snapshot.h create mode 100644 drivers/gpu/drm/msm/disp/msm_disp_snapshot_util.c
dri-devel@lists.freedesktop.org
-
Abhinav Kumar -
Dmitry Baryshkov