Commit 47c0fd72 authored by Dave Airlie's avatar Dave Airlie
Browse files

Merge tag 'topic/drm-misc-2015-12-04' of git://anongit.freedesktop.org/drm-intel into drm-next 

New -misc pull. Big thing is Thierry's atomic helpers for system suspend
resume, which I'd like to use in i915 too. Hence the pull.

* tag 'topic/drm-misc-2015-12-04' of git://anongit.freedesktop.org/drm-intel:
  drm: keep connector status change logging human readable
  drm/atomic-helper: Reject attempts at re-stealing encoders
  drm/atomic-helper: Implement subsystem-level suspend/resume
  drm: Implement drm_modeset_lock_all_ctx()
  drm/gma500: Add driver private mutex for the fault handler
  drm/gma500: Drop dev->struct_mutex from mmap offset function
  drm/gma500: Drop dev->struct_mutex from fbdev init/teardown code
  drm/gma500: Drop dev->struct_mutex from modeset code
  drm/gma500: Use correct unref in the gem bo create function
  drm/edid: Make the detailed timing CEA/HDMI mode fixup accept up to 5kHz clock difference
  drm/atomic_helper: Add drm_atomic_helper_disable_planes_on_crtc()
  drm: Serialise multiple event readers
  drm: Drop dev->event_lock spinlock around faulting copy_to_user()
parents 80d69009 4e15f2a1

drivers/gpu/drm/drm_atomic.c

+1 −6
Original line number Diff line number Diff line
@@ -1188,12 +1188,7 @@ void drm_atomic_legacy_backoff(struct drm_atomic_state *state) 
retry:

	drm_modeset_backoff(state->acquire_ctx);



	ret = drm_modeset_lock(&state->dev->mode_config.connection_mutex,

			       state->acquire_ctx);

	if (ret)

		goto retry;

	ret = drm_modeset_lock_all_crtcs(state->dev,

					 state->acquire_ctx);

	ret = drm_modeset_lock_all_ctx(state->dev, state->acquire_ctx);

	if (ret)

		goto retry;

}

drivers/gpu/drm/drm_atomic_helper.c

+232 −1
Original line number Diff line number Diff line
@@ -80,6 +80,27 @@ drm_atomic_helper_plane_changed(struct drm_atomic_state *state, 
	}

}



static bool

check_pending_encoder_assignment(struct drm_atomic_state *state,

				 struct drm_encoder *new_encoder,

				 struct drm_connector *new_connector)

{

	struct drm_connector *connector;

	struct drm_connector_state *conn_state;

	int i;



	for_each_connector_in_state(state, connector, conn_state, i) {

		if (conn_state->best_encoder != new_encoder)

			continue;



		/* encoder already assigned and we're trying to re-steal it! */

		if (connector->state->best_encoder != conn_state->best_encoder)

			return false;

	}



	return true;

}



static struct drm_crtc *

get_current_crtc_for_encoder(struct drm_device *dev,

			     struct drm_encoder *encoder)
@@ -229,6 +250,13 @@ update_connector_routing(struct drm_atomic_state *state, int conn_idx) 
		return 0;

	}



	if (!check_pending_encoder_assignment(state, new_encoder, connector)) {

		DRM_DEBUG_ATOMIC("Encoder for [CONNECTOR:%d:%s] already assigned\n",

				 connector->base.id,

				 connector->name);

		return -EINVAL;

	}



	encoder_crtc = get_current_crtc_for_encoder(state->dev,

						    new_encoder);
@@ -1341,6 +1369,49 @@ drm_atomic_helper_commit_planes_on_crtc(struct drm_crtc_state *old_crtc_state) 
}

EXPORT_SYMBOL(drm_atomic_helper_commit_planes_on_crtc);



/**

 * drm_atomic_helper_disable_planes_on_crtc - helper to disable CRTC's planes

 * @crtc: CRTC

 * @atomic: if set, synchronize with CRTC's atomic_begin/flush hooks

 *

 * Disables all planes associated with the given CRTC. This can be

 * used for instance in the CRTC helper disable callback to disable

 * all planes before shutting down the display pipeline.

 *

 * If the atomic-parameter is set the function calls the CRTC's

 * atomic_begin hook before and atomic_flush hook after disabling the

 * planes.

 *

 * It is a bug to call this function without having implemented the

 * ->atomic_disable() plane hook.

 */

void drm_atomic_helper_disable_planes_on_crtc(struct drm_crtc *crtc,

					      bool atomic)

{

	const struct drm_crtc_helper_funcs *crtc_funcs =

		crtc->helper_private;

	struct drm_plane *plane;



	if (atomic && crtc_funcs && crtc_funcs->atomic_begin)

		crtc_funcs->atomic_begin(crtc, NULL);



	drm_for_each_plane(plane, crtc->dev) {

		const struct drm_plane_helper_funcs *plane_funcs =

			plane->helper_private;



		if (plane->state->crtc != crtc || !plane_funcs)

			continue;



		WARN_ON(!plane_funcs->atomic_disable);

		if (plane_funcs->atomic_disable)

			plane_funcs->atomic_disable(plane, NULL);

	}



	if (atomic && crtc_funcs && crtc_funcs->atomic_flush)

		crtc_funcs->atomic_flush(crtc, NULL);

}

EXPORT_SYMBOL(drm_atomic_helper_disable_planes_on_crtc);



/**

 * drm_atomic_helper_cleanup_planes - cleanup plane resources after commit

 * @dev: DRM device
@@ -1817,6 +1888,161 @@ commit: 
	return 0;

}



/**

 * drm_atomic_helper_disable_all - disable all currently active outputs

 * @dev: DRM device

 * @ctx: lock acquisition context

 *

 * Loops through all connectors, finding those that aren't turned off and then

 * turns them off by setting their DPMS mode to OFF and deactivating the CRTC

 * that they are connected to.

 *

 * This is used for example in suspend/resume to disable all currently active

 * functions when suspending.

 *

 * Note that if callers haven't already acquired all modeset locks this might

 * return -EDEADLK, which must be handled by calling drm_modeset_backoff().

 *

 * Returns:

 * 0 on success or a negative error code on failure.

 *

 * See also:

 * drm_atomic_helper_suspend(), drm_atomic_helper_resume()

 */

int drm_atomic_helper_disable_all(struct drm_device *dev,

				  struct drm_modeset_acquire_ctx *ctx)

{

	struct drm_atomic_state *state;

	struct drm_connector *conn;

	int err;



	state = drm_atomic_state_alloc(dev);

	if (!state)

		return -ENOMEM;



	state->acquire_ctx = ctx;



	drm_for_each_connector(conn, dev) {

		struct drm_crtc *crtc = conn->state->crtc;

		struct drm_crtc_state *crtc_state;



		if (!crtc || conn->dpms != DRM_MODE_DPMS_ON)

			continue;



		crtc_state = drm_atomic_get_crtc_state(state, crtc);

		if (IS_ERR(crtc_state)) {

			err = PTR_ERR(crtc_state);

			goto free;

		}



		crtc_state->active = false;

	}



	err = drm_atomic_commit(state);



free:

	if (err < 0)

		drm_atomic_state_free(state);



	return err;

}

EXPORT_SYMBOL(drm_atomic_helper_disable_all);



/**

 * drm_atomic_helper_suspend - subsystem-level suspend helper

 * @dev: DRM device

 *

 * Duplicates the current atomic state, disables all active outputs and then

 * returns a pointer to the original atomic state to the caller. Drivers can

 * pass this pointer to the drm_atomic_helper_resume() helper upon resume to

 * restore the output configuration that was active at the time the system

 * entered suspend.

 *

 * Note that it is potentially unsafe to use this. The atomic state object

 * returned by this function is assumed to be persistent. Drivers must ensure

 * that this holds true. Before calling this function, drivers must make sure

 * to suspend fbdev emulation so that nothing can be using the device.

 *

 * Returns:

 * A pointer to a copy of the state before suspend on success or an ERR_PTR()-

 * encoded error code on failure. Drivers should store the returned atomic

 * state object and pass it to the drm_atomic_helper_resume() helper upon

 * resume.

 *

 * See also:

 * drm_atomic_helper_duplicate_state(), drm_atomic_helper_disable_all(),

 * drm_atomic_helper_resume()

 */

struct drm_atomic_state *drm_atomic_helper_suspend(struct drm_device *dev)

{

	struct drm_modeset_acquire_ctx ctx;

	struct drm_atomic_state *state;

	int err;



	drm_modeset_acquire_init(&ctx, 0);



retry:

	err = drm_modeset_lock_all_ctx(dev, &ctx);

	if (err < 0) {

		state = ERR_PTR(err);

		goto unlock;

	}



	state = drm_atomic_helper_duplicate_state(dev, &ctx);

	if (IS_ERR(state))

		goto unlock;



	err = drm_atomic_helper_disable_all(dev, &ctx);

	if (err < 0) {

		drm_atomic_state_free(state);

		state = ERR_PTR(err);

		goto unlock;

	}



unlock:

	if (PTR_ERR(state) == -EDEADLK) {

		drm_modeset_backoff(&ctx);

		goto retry;

	}



	drm_modeset_drop_locks(&ctx);

	drm_modeset_acquire_fini(&ctx);

	return state;

}

EXPORT_SYMBOL(drm_atomic_helper_suspend);



/**

 * drm_atomic_helper_resume - subsystem-level resume helper

 * @dev: DRM device

 * @state: atomic state to resume to

 *

 * Calls drm_mode_config_reset() to synchronize hardware and software states,

 * grabs all modeset locks and commits the atomic state object. This can be

 * used in conjunction with the drm_atomic_helper_suspend() helper to

 * implement suspend/resume for drivers that support atomic mode-setting.

 *

 * Returns:

 * 0 on success or a negative error code on failure.

 *

 * See also:

 * drm_atomic_helper_suspend()

 */

int drm_atomic_helper_resume(struct drm_device *dev,

			     struct drm_atomic_state *state)

{

	struct drm_mode_config *config = &dev->mode_config;

	int err;



	drm_mode_config_reset(dev);

	drm_modeset_lock_all(dev);

	state->acquire_ctx = config->acquire_ctx;

	err = drm_atomic_commit(state);

	drm_modeset_unlock_all(dev);



	return err;

}

EXPORT_SYMBOL(drm_atomic_helper_resume);



/**

 * drm_atomic_helper_crtc_set_property - helper for crtc properties

 * @crtc: DRM crtc
@@ -2429,7 +2655,9 @@ EXPORT_SYMBOL(drm_atomic_helper_connector_duplicate_state); 
 * @ctx: lock acquisition context

 *

 * Makes a copy of the current atomic state by looping over all objects and

 * duplicating their respective states.

 * duplicating their respective states. This is used for example by suspend/

 * resume support code to save the state prior to suspend such that it can

 * be restored upon resume.

 *

 * Note that this treats atomic state as persistent between save and restore.

 * Drivers must make sure that this is possible and won't result in confusion
@@ -2441,6 +2669,9 @@ EXPORT_SYMBOL(drm_atomic_helper_connector_duplicate_state); 
 * Returns:

 * A pointer to the copy of the atomic state object on success or an

 * ERR_PTR()-encoded error code on failure.

 *

 * See also:

 * drm_atomic_helper_suspend(), drm_atomic_helper_resume()

 */

struct drm_atomic_state *

drm_atomic_helper_duplicate_state(struct drm_device *dev,

drivers/gpu/drm/drm_crtc_helper.c

+6 −0
Original line number Diff line number Diff line
@@ -855,6 +855,12 @@ EXPORT_SYMBOL(drm_helper_mode_fill_fb_struct); 
 * due to slight differences in allocating shared resources when the

 * configuration is restored in a different order than when userspace set it up)

 * need to use their own restore logic.

 *

 * This function is deprecated. New drivers should implement atomic mode-

 * setting and use the atomic suspend/resume helpers.

 *

 * See also:

 * drm_atomic_helper_suspend(), drm_atomic_helper_resume()

 */

void drm_helper_resume_force_mode(struct drm_device *dev)

{

drivers/gpu/drm/drm_edid.c

+60 −2
Original line number Diff line number Diff line
@@ -2545,6 +2545,33 @@ cea_mode_alternate_clock(const struct drm_display_mode *cea_mode) 
	return clock;

}



static u8 drm_match_cea_mode_clock_tolerance(const struct drm_display_mode *to_match,

					     unsigned int clock_tolerance)

{

	u8 mode;



	if (!to_match->clock)

		return 0;



	for (mode = 0; mode < ARRAY_SIZE(edid_cea_modes); mode++) {

		const struct drm_display_mode *cea_mode = &edid_cea_modes[mode];

		unsigned int clock1, clock2;



		/* Check both 60Hz and 59.94Hz */

		clock1 = cea_mode->clock;

		clock2 = cea_mode_alternate_clock(cea_mode);



		if (abs(to_match->clock - clock1) > clock_tolerance &&

		    abs(to_match->clock - clock2) > clock_tolerance)

			continue;



		if (drm_mode_equal_no_clocks(to_match, cea_mode))

			return mode + 1;

	}



	return 0;

}



/**

 * drm_match_cea_mode - look for a CEA mode matching given mode

 * @to_match: display mode
@@ -2609,6 +2636,33 @@ hdmi_mode_alternate_clock(const struct drm_display_mode *hdmi_mode) 
	return cea_mode_alternate_clock(hdmi_mode);

}



static u8 drm_match_hdmi_mode_clock_tolerance(const struct drm_display_mode *to_match,

					      unsigned int clock_tolerance)

{

	u8 mode;



	if (!to_match->clock)

		return 0;



	for (mode = 0; mode < ARRAY_SIZE(edid_4k_modes); mode++) {

		const struct drm_display_mode *hdmi_mode = &edid_4k_modes[mode];

		unsigned int clock1, clock2;



		/* Make sure to also match alternate clocks */

		clock1 = hdmi_mode->clock;

		clock2 = hdmi_mode_alternate_clock(hdmi_mode);



		if (abs(to_match->clock - clock1) > clock_tolerance &&

		    abs(to_match->clock - clock2) > clock_tolerance)

			continue;



		if (drm_mode_equal_no_clocks(to_match, hdmi_mode))

			return mode + 1;

	}



	return 0;

}



/*

 * drm_match_hdmi_mode - look for a HDMI mode matching given mode

 * @to_match: display mode
@@ -3119,14 +3173,18 @@ static void fixup_detailed_cea_mode_clock(struct drm_display_mode *mode) 
	u8 mode_idx;

	const char *type;



	mode_idx = drm_match_cea_mode(mode) - 1;

	/*

	 * allow 5kHz clock difference either way to account for

	 * the 10kHz clock resolution limit of detailed timings.

	 */

	mode_idx = drm_match_cea_mode_clock_tolerance(mode, 5) - 1;

	if (mode_idx < ARRAY_SIZE(edid_cea_modes)) {

		type = "CEA";

		cea_mode = &edid_cea_modes[mode_idx];

		clock1 = cea_mode->clock;

		clock2 = cea_mode_alternate_clock(cea_mode);

	} else {

		mode_idx = drm_match_hdmi_mode(mode) - 1;

		mode_idx = drm_match_hdmi_mode_clock_tolerance(mode, 5) - 1;

		if (mode_idx < ARRAY_SIZE(edid_4k_modes)) {

			type = "HDMI";

			cea_mode = &edid_4k_modes[mode_idx];

drivers/gpu/drm/drm_fops.c

+37 −21
Original line number Diff line number Diff line
@@ -172,6 +172,8 @@ static int drm_open_helper(struct file *filp, struct drm_minor *minor) 
	init_waitqueue_head(&priv->event_wait);

	priv->event_space = 4096; /* set aside 4k for event buffer */



	mutex_init(&priv->event_read_lock);



	if (drm_core_check_feature(dev, DRIVER_GEM))

		drm_gem_open(dev, priv);
@@ -483,14 +485,28 @@ ssize_t drm_read(struct file *filp, char __user *buffer, 
{

	struct drm_file *file_priv = filp->private_data;

	struct drm_device *dev = file_priv->minor->dev;

	ssize_t ret = 0;

	ssize_t ret;



	if (!access_ok(VERIFY_WRITE, buffer, count))

		return -EFAULT;



	spin_lock_irq(&dev->event_lock);

	ret = mutex_lock_interruptible(&file_priv->event_read_lock);

	if (ret)

		return ret;



	for (;;) {

		if (list_empty(&file_priv->event_list)) {

		struct drm_pending_event *e = NULL;



		spin_lock_irq(&dev->event_lock);

		if (!list_empty(&file_priv->event_list)) {

			e = list_first_entry(&file_priv->event_list,

					struct drm_pending_event, link);

			file_priv->event_space += e->event->length;

			list_del(&e->link);

		}

		spin_unlock_irq(&dev->event_lock);



		if (e == NULL) {

			if (ret)

				break;
@@ -499,36 +515,36 @@ ssize_t drm_read(struct file *filp, char __user *buffer, 
				break;

			}



			spin_unlock_irq(&dev->event_lock);

			mutex_unlock(&file_priv->event_read_lock);

			ret = wait_event_interruptible(file_priv->event_wait,

						       !list_empty(&file_priv->event_list));

			spin_lock_irq(&dev->event_lock);

			if (ret < 0)

				break;



			ret = 0;

			if (ret >= 0)

				ret = mutex_lock_interruptible(&file_priv->event_read_lock);

			if (ret)

				return ret;

		} else {

			struct drm_pending_event *e;

			unsigned length = e->event->length;



			e = list_first_entry(&file_priv->event_list,

					     struct drm_pending_event, link);

			if (e->event->length + ret > count)

			if (length > count - ret) {

put_back_event:

				spin_lock_irq(&dev->event_lock);

				file_priv->event_space -= length;

				list_add(&e->link, &file_priv->event_list);

				spin_unlock_irq(&dev->event_lock);

				break;

			}



			if (__copy_to_user_inatomic(buffer + ret,

						    e->event, e->event->length)) {

			if (copy_to_user(buffer + ret, e->event, length)) {

				if (ret == 0)

					ret = -EFAULT;

				break;

				goto put_back_event;

			}



			file_priv->event_space += e->event->length;

			ret += e->event->length;

			list_del(&e->link);

			ret += length;

			e->destroy(e);

		}

	}

	spin_unlock_irq(&dev->event_lock);

	mutex_unlock(&file_priv->event_read_lock);



	return ret;

}

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