From 59c6106e274dbafd9d25357585ae5ede4b6673dd Mon Sep 17 00:00:00 2001 From: Jani Nikula Date: Fri, 14 Apr 2023 12:41:59 +0300 Subject: drm/i915/display: add intel_display_reset.[ch] Split out the display reset functionality to a separate file to declutter intel_display.c. Rename the functions accordingly. The minor downside is having to expose __intel_display_resume(). Reviewed-by: Gustavo Sousa Signed-off-by: Jani Nikula Link: https://patchwork.freedesktop.org/patch/msgid/5e98e2fc5f0c09490e02d22250c8201342852288.1681465222.git.jani.nikula@intel.com --- drivers/gpu/drm/i915/Makefile | 1 + drivers/gpu/drm/i915/display/intel_display.c | 123 +------------------ drivers/gpu/drm/i915/display/intel_display.h | 8 +- drivers/gpu/drm/i915/display/intel_display_reset.c | 135 +++++++++++++++++++++ drivers/gpu/drm/i915/display/intel_display_reset.h | 14 +++ drivers/gpu/drm/i915/gt/intel_reset.c | 6 +- 6 files changed, 160 insertions(+), 127 deletions(-) create mode 100644 drivers/gpu/drm/i915/display/intel_display_reset.c create mode 100644 drivers/gpu/drm/i915/display/intel_display_reset.h (limited to 'drivers/gpu/drm/i915') diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile index 627ec074df09..154986359169 100644 --- a/drivers/gpu/drm/i915/Makefile +++ b/drivers/gpu/drm/i915/Makefile @@ -241,6 +241,7 @@ i915-y += \ display/intel_display_power.o \ display/intel_display_power_map.o \ display/intel_display_power_well.o \ + display/intel_display_reset.o \ display/intel_display_rps.o \ display/intel_dmc.o \ display/intel_dpio_phy.o \ diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c index 8abce9a9a900..47ec1bf46f71 100644 --- a/drivers/gpu/drm/i915/display/intel_display.c +++ b/drivers/gpu/drm/i915/display/intel_display.c @@ -693,7 +693,7 @@ intel_plane_fence_y_offset(const struct intel_plane_state *plane_state) return y; } -static int +int __intel_display_resume(struct drm_i915_private *i915, struct drm_atomic_state *state, struct drm_modeset_acquire_ctx *ctx) @@ -733,127 +733,6 @@ __intel_display_resume(struct drm_i915_private *i915, return ret; } -static bool gpu_reset_clobbers_display(struct drm_i915_private *dev_priv) -{ - return (INTEL_INFO(dev_priv)->gpu_reset_clobbers_display && - intel_has_gpu_reset(to_gt(dev_priv))); -} - -void intel_display_prepare_reset(struct drm_i915_private *dev_priv) -{ - struct drm_modeset_acquire_ctx *ctx = &dev_priv->display.restore.reset_ctx; - struct drm_atomic_state *state; - int ret; - - if (!HAS_DISPLAY(dev_priv)) - return; - - /* reset doesn't touch the display */ - if (!dev_priv->params.force_reset_modeset_test && - !gpu_reset_clobbers_display(dev_priv)) - return; - - /* We have a modeset vs reset deadlock, defensively unbreak it. */ - set_bit(I915_RESET_MODESET, &to_gt(dev_priv)->reset.flags); - smp_mb__after_atomic(); - wake_up_bit(&to_gt(dev_priv)->reset.flags, I915_RESET_MODESET); - - if (atomic_read(&dev_priv->gpu_error.pending_fb_pin)) { - drm_dbg_kms(&dev_priv->drm, - "Modeset potentially stuck, unbreaking through wedging\n"); - intel_gt_set_wedged(to_gt(dev_priv)); - } - - /* - * Need mode_config.mutex so that we don't - * trample ongoing ->detect() and whatnot. - */ - mutex_lock(&dev_priv->drm.mode_config.mutex); - drm_modeset_acquire_init(ctx, 0); - while (1) { - ret = drm_modeset_lock_all_ctx(&dev_priv->drm, ctx); - if (ret != -EDEADLK) - break; - - drm_modeset_backoff(ctx); - } - /* - * Disabling the crtcs gracefully seems nicer. Also the - * g33 docs say we should at least disable all the planes. - */ - state = drm_atomic_helper_duplicate_state(&dev_priv->drm, ctx); - if (IS_ERR(state)) { - ret = PTR_ERR(state); - drm_err(&dev_priv->drm, "Duplicating state failed with %i\n", - ret); - return; - } - - ret = drm_atomic_helper_disable_all(&dev_priv->drm, ctx); - if (ret) { - drm_err(&dev_priv->drm, "Suspending crtc's failed with %i\n", - ret); - drm_atomic_state_put(state); - return; - } - - dev_priv->display.restore.modeset_state = state; - state->acquire_ctx = ctx; -} - -void intel_display_finish_reset(struct drm_i915_private *i915) -{ - struct drm_modeset_acquire_ctx *ctx = &i915->display.restore.reset_ctx; - struct drm_atomic_state *state; - int ret; - - if (!HAS_DISPLAY(i915)) - return; - - /* reset doesn't touch the display */ - if (!test_bit(I915_RESET_MODESET, &to_gt(i915)->reset.flags)) - return; - - state = fetch_and_zero(&i915->display.restore.modeset_state); - if (!state) - goto unlock; - - /* reset doesn't touch the display */ - if (!gpu_reset_clobbers_display(i915)) { - /* for testing only restore the display */ - ret = drm_atomic_helper_commit_duplicated_state(state, ctx); - if (ret) { - drm_WARN_ON(&i915->drm, ret == -EDEADLK); - drm_err(&i915->drm, - "Restoring old state failed with %i\n", ret); - } - } else { - /* - * The display has been reset as well, - * so need a full re-initialization. - */ - intel_pps_unlock_regs_wa(i915); - intel_display_driver_init_hw(i915); - intel_clock_gating_init(i915); - intel_hpd_init(i915); - - ret = __intel_display_resume(i915, state, ctx); - if (ret) - drm_err(&i915->drm, - "Restoring old state failed with %i\n", ret); - - intel_hpd_poll_disable(i915); - } - - drm_atomic_state_put(state); -unlock: - drm_modeset_drop_locks(ctx); - drm_modeset_acquire_fini(ctx); - mutex_unlock(&i915->drm.mode_config.mutex); - - clear_bit_unlock(I915_RESET_MODESET, &to_gt(i915)->reset.flags); -} - static void icl_set_pipe_chicken(const struct intel_crtc_state *crtc_state) { struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc); diff --git a/drivers/gpu/drm/i915/display/intel_display.h b/drivers/gpu/drm/i915/display/intel_display.h index 01c27a4757a5..346f6342e8ed 100644 --- a/drivers/gpu/drm/i915/display/intel_display.h +++ b/drivers/gpu/drm/i915/display/intel_display.h @@ -468,8 +468,6 @@ intel_framebuffer_create(struct drm_i915_gem_object *obj, bool intel_fuzzy_clock_check(int clock1, int clock2); -void intel_display_prepare_reset(struct drm_i915_private *dev_priv); -void intel_display_finish_reset(struct drm_i915_private *dev_priv); void intel_zero_m_n(struct intel_link_m_n *m_n); void intel_set_m_n(struct drm_i915_private *i915, const struct intel_link_m_n *m_n, @@ -543,6 +541,12 @@ int intel_atomic_commit(struct drm_device *dev, struct drm_atomic_state *_state, void intel_hpd_poll_fini(struct drm_i915_private *i915); +/* interface for intel_display_reset.c */ +int +__intel_display_resume(struct drm_i915_private *i915, + struct drm_atomic_state *state, + struct drm_modeset_acquire_ctx *ctx); + /* modesetting asserts */ void assert_transcoder(struct drm_i915_private *dev_priv, enum transcoder cpu_transcoder, bool state); diff --git a/drivers/gpu/drm/i915/display/intel_display_reset.c b/drivers/gpu/drm/i915/display/intel_display_reset.c new file mode 100644 index 000000000000..166aa0cab1fc --- /dev/null +++ b/drivers/gpu/drm/i915/display/intel_display_reset.c @@ -0,0 +1,135 @@ +// SPDX-License-Identifier: MIT +/* + * Copyright © 2023 Intel Corporation + */ + +#include + +#include "i915_drv.h" +#include "intel_clock_gating.h" +#include "intel_display_driver.h" +#include "intel_display_reset.h" +#include "intel_display_types.h" +#include "intel_hotplug.h" +#include "intel_pps.h" + +static bool gpu_reset_clobbers_display(struct drm_i915_private *dev_priv) +{ + return (INTEL_INFO(dev_priv)->gpu_reset_clobbers_display && + intel_has_gpu_reset(to_gt(dev_priv))); +} + +void intel_display_reset_prepare(struct drm_i915_private *dev_priv) +{ + struct drm_modeset_acquire_ctx *ctx = &dev_priv->display.restore.reset_ctx; + struct drm_atomic_state *state; + int ret; + + if (!HAS_DISPLAY(dev_priv)) + return; + + /* reset doesn't touch the display */ + if (!dev_priv->params.force_reset_modeset_test && + !gpu_reset_clobbers_display(dev_priv)) + return; + + /* We have a modeset vs reset deadlock, defensively unbreak it. */ + set_bit(I915_RESET_MODESET, &to_gt(dev_priv)->reset.flags); + smp_mb__after_atomic(); + wake_up_bit(&to_gt(dev_priv)->reset.flags, I915_RESET_MODESET); + + if (atomic_read(&dev_priv->gpu_error.pending_fb_pin)) { + drm_dbg_kms(&dev_priv->drm, + "Modeset potentially stuck, unbreaking through wedging\n"); + intel_gt_set_wedged(to_gt(dev_priv)); + } + + /* + * Need mode_config.mutex so that we don't + * trample ongoing ->detect() and whatnot. + */ + mutex_lock(&dev_priv->drm.mode_config.mutex); + drm_modeset_acquire_init(ctx, 0); + while (1) { + ret = drm_modeset_lock_all_ctx(&dev_priv->drm, ctx); + if (ret != -EDEADLK) + break; + + drm_modeset_backoff(ctx); + } + /* + * Disabling the crtcs gracefully seems nicer. Also the + * g33 docs say we should at least disable all the planes. + */ + state = drm_atomic_helper_duplicate_state(&dev_priv->drm, ctx); + if (IS_ERR(state)) { + ret = PTR_ERR(state); + drm_err(&dev_priv->drm, "Duplicating state failed with %i\n", + ret); + return; + } + + ret = drm_atomic_helper_disable_all(&dev_priv->drm, ctx); + if (ret) { + drm_err(&dev_priv->drm, "Suspending crtc's failed with %i\n", + ret); + drm_atomic_state_put(state); + return; + } + + dev_priv->display.restore.modeset_state = state; + state->acquire_ctx = ctx; +} + +void intel_display_reset_finish(struct drm_i915_private *i915) +{ + struct drm_modeset_acquire_ctx *ctx = &i915->display.restore.reset_ctx; + struct drm_atomic_state *state; + int ret; + + if (!HAS_DISPLAY(i915)) + return; + + /* reset doesn't touch the display */ + if (!test_bit(I915_RESET_MODESET, &to_gt(i915)->reset.flags)) + return; + + state = fetch_and_zero(&i915->display.restore.modeset_state); + if (!state) + goto unlock; + + /* reset doesn't touch the display */ + if (!gpu_reset_clobbers_display(i915)) { + /* for testing only restore the display */ + ret = drm_atomic_helper_commit_duplicated_state(state, ctx); + if (ret) { + drm_WARN_ON(&i915->drm, ret == -EDEADLK); + drm_err(&i915->drm, + "Restoring old state failed with %i\n", ret); + } + } else { + /* + * The display has been reset as well, + * so need a full re-initialization. + */ + intel_pps_unlock_regs_wa(i915); + intel_display_driver_init_hw(i915); + intel_clock_gating_init(i915); + intel_hpd_init(i915); + + ret = __intel_display_resume(i915, state, ctx); + if (ret) + drm_err(&i915->drm, + "Restoring old state failed with %i\n", ret); + + intel_hpd_poll_disable(i915); + } + + drm_atomic_state_put(state); +unlock: + drm_modeset_drop_locks(ctx); + drm_modeset_acquire_fini(ctx); + mutex_unlock(&i915->drm.mode_config.mutex); + + clear_bit_unlock(I915_RESET_MODESET, &to_gt(i915)->reset.flags); +} diff --git a/drivers/gpu/drm/i915/display/intel_display_reset.h b/drivers/gpu/drm/i915/display/intel_display_reset.h new file mode 100644 index 000000000000..f06d0d35b86b --- /dev/null +++ b/drivers/gpu/drm/i915/display/intel_display_reset.h @@ -0,0 +1,14 @@ +/* SPDX-License-Identifier: MIT */ +/* + * Copyright © 2023 Intel Corporation + */ + +#ifndef __INTEL_RESET_H__ +#define __INTEL_RESET_H__ + +struct drm_i915_private; + +void intel_display_reset_prepare(struct drm_i915_private *i915); +void intel_display_reset_finish(struct drm_i915_private *i915); + +#endif /* __INTEL_RESET_H__ */ diff --git a/drivers/gpu/drm/i915/gt/intel_reset.c b/drivers/gpu/drm/i915/gt/intel_reset.c index 0bb9094fdacd..c129138f666f 100644 --- a/drivers/gpu/drm/i915/gt/intel_reset.c +++ b/drivers/gpu/drm/i915/gt/intel_reset.c @@ -7,7 +7,7 @@ #include #include -#include "display/intel_display.h" +#include "display/intel_display_reset.h" #include "display/intel_overlay.h" #include "gem/i915_gem_context.h" @@ -1291,11 +1291,11 @@ static void intel_gt_reset_global(struct intel_gt *gt, /* Use a watchdog to ensure that our reset completes */ intel_wedge_on_timeout(&w, gt, 60 * HZ) { - intel_display_prepare_reset(gt->i915); + intel_display_reset_prepare(gt->i915); intel_gt_reset(gt, engine_mask, reason); - intel_display_finish_reset(gt->i915); + intel_display_reset_finish(gt->i915); } if (!test_bit(I915_WEDGED, >->reset.flags)) -- cgit v1.2.3