[Intel-xe] [PATCH 07/15] drm/i915/display: add intel_display_reset.[ch]
José Roberto de Souza
jose.souza at intel.com
Mon Apr 24 16:51:27 UTC 2023
From: Jani Nikula <jani.nikula at intel.com>
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 <gustavo.sousa at intel.com>
Signed-off-by: Jani Nikula <jani.nikula at intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/5e98e2fc5f0c09490e02d22250c8201342852288.1681465222.git.jani.nikula@intel.com
(cherry picked from commit 59c6106e274dbafd9d25357585ae5ede4b6673dd)
---
drivers/gpu/drm/i915/Makefile | 1 +
drivers/gpu/drm/i915/display/intel_display.c | 125 +---------------
drivers/gpu/drm/i915/display/intel_display.h | 8 +-
.../drm/i915/display/intel_display_reset.c | 135 ++++++++++++++++++
.../drm/i915/display/intel_display_reset.h | 14 ++
drivers/gpu/drm/i915/gt/intel_reset.c | 6 +-
6 files changed, 160 insertions(+), 129 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
diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile
index 53ebbadc8bc47..fd54705de3fb8 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 d1eb24214bc0b..246cd9b02a739 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -694,7 +694,7 @@ 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)
@@ -734,129 +734,6 @@ __intel_display_resume(struct drm_i915_private *i915,
return ret;
}
-#ifdef I915
-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);
-}
-#endif
-
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 bc5f244220d0a..983cc2026405e 100644
--- a/drivers/gpu/drm/i915/display/intel_display.h
+++ b/drivers/gpu/drm/i915/display/intel_display.h
@@ -476,8 +476,6 @@ 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,
@@ -551,6 +549,12 @@ 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 0000000000000..166aa0cab1fc6
--- /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 <drm/drm_atomic_helper.h>
+
+#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 0000000000000..f06d0d35b86b1
--- /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 382a72727582a..6be28fe7f8f8f 100644
--- a/drivers/gpu/drm/i915/gt/intel_reset.c
+++ b/drivers/gpu/drm/i915/gt/intel_reset.c
@@ -7,7 +7,7 @@
#include <linux/stop_machine.h>
#include <linux/string_helpers.h>
-#include "display/intel_display.h"
+#include "display/intel_display_reset.h"
#include "display/intel_overlay.h"
#include "gem/i915_gem_context.h"
@@ -1292,11 +1292,11 @@ 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))
--
2.40.0
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