Re: [PATCH 1/3] drm/i915: Convert intel_tv connector properties to atomic, v2.

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On Mon, Mar 13, 2017 at 05:10:28PM +0100, Maarten Lankhorst wrote:
> As a proof of concept, first try to convert intel_tv, which is a rarely
> used connector. It has 5 properties, tv format and 4 margins.
> 
> I'm less certain about the state behavior itself, should we pass a size
> parameter to intel_connector_alloc instead, so duplicate_state
> can be done globally if it can be blindly copied?
> 
> Can we also have a atomic_check function for connectors, so the
> crtc_state->connectors_changed can be set there? It would be cleaner
> and more atomic-like.
> 
> To match the legacy behavior, format can be changed by probing just like
> in legacy mode.
> 
> Changes since v1:
> - Add intel_encoder->swap_state to allow updating connector state.
> - Add intel_tv->format for detect_mode and mode_valid, updated on atomic commit.
> 
> Signed-off-by: Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx>
> ---
>  drivers/gpu/drm/i915/intel_display.c |  15 ++
>  drivers/gpu/drm/i915/intel_drv.h     |   4 +
>  drivers/gpu/drm/i915/intel_tv.c      | 259 +++++++++++++++++++++--------------
>  3 files changed, 176 insertions(+), 102 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
> index ac25c9bc8b81..18b7e7546ee1 100644
> --- a/drivers/gpu/drm/i915/intel_display.c
> +++ b/drivers/gpu/drm/i915/intel_display.c
> @@ -12954,6 +12954,20 @@ static void intel_atomic_track_fbs(struct drm_atomic_state *state)
>  				  to_intel_plane(plane)->frontbuffer_bit);
>  }
>  
> +static void swap_connector_state(struct drm_atomic_state *state)
> +{
> +	struct drm_connector *connector;
> +	struct drm_connector_state *new_conn_state;
> +	int i;
> +
> +	for_each_new_connector_in_state(state, connector, new_conn_state, i) {
> +		struct intel_connector *conn = to_intel_connector(connector);
> +
> +		if (conn->swap_state)
> +			conn->swap_state(conn, new_conn_state);
> +	}
> +}
> +
>  /**
>   * intel_atomic_commit - commit validated state object
>   * @dev: DRM device
> @@ -13012,6 +13026,7 @@ static int intel_atomic_commit(struct drm_device *dev,
>  		dev_priv->cdclk.logical = intel_state->cdclk.logical;
>  		dev_priv->cdclk.actual = intel_state->cdclk.actual;
>  	}
> +	swap_connector_state(state);
>  
>  	drm_atomic_state_get(state);
>  	INIT_WORK(&state->commit_work,
> diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
> index 937623ff6d7c..b7b93799d288 100644
> --- a/drivers/gpu/drm/i915/intel_drv.h
> +++ b/drivers/gpu/drm/i915/intel_drv.h
> @@ -307,6 +307,10 @@ struct intel_connector {
>  	 * and active (i.e. dpms ON state). */
>  	bool (*get_hw_state)(struct intel_connector *);
>  
> +	/* Update device state with the new atomic state. */
> +	void (*swap_state)(struct intel_connector *,
> +			     struct drm_connector_state *);
> +
>  	/* Panel info for eDP and LVDS */
>  	struct intel_panel panel;
>  
> diff --git a/drivers/gpu/drm/i915/intel_tv.c b/drivers/gpu/drm/i915/intel_tv.c
> index 6ed1a3ce47b7..b87d51e61975 100644
> --- a/drivers/gpu/drm/i915/intel_tv.c
> +++ b/drivers/gpu/drm/i915/intel_tv.c
> @@ -48,8 +48,6 @@ struct intel_tv {
>  	struct intel_encoder base;
>  
>  	int type;
> -	const char *tv_format;
> -	int margin[4];
>  	u32 save_TV_H_CTL_1;
>  	u32 save_TV_H_CTL_2;
>  	u32 save_TV_H_CTL_3;
> @@ -83,8 +81,20 @@ struct intel_tv {
>  
>  	u32 save_TV_DAC;
>  	u32 save_TV_CTL;
> +
> +	int format;
> +};
> +
> +struct intel_tv_connector_state {
> +	struct drm_connector_state base;
> +
> +	int format;
> +	int margin[4];
>  };
>  
> +#define to_intel_tv_connector_state(state) \
> +	container_of((state), struct intel_tv_connector_state, base)
> +
>  struct video_levels {
>  	u16 blank, black;
>  	u8 burst;
> @@ -848,6 +858,17 @@ intel_tv_get_hw_state(struct intel_encoder *encoder, enum pipe *pipe)
>  }
>  
>  static void
> +intel_tv_swap_state(struct intel_connector *connector,
> +		    struct drm_connector_state *conn_state)
> +{
> +	struct intel_tv *intel_tv = intel_attached_tv(&connector->base);
> +	struct intel_tv_connector_state *tv_state =
> +		to_intel_tv_connector_state(conn_state);
> +
> +	intel_tv->format = tv_state->format;
> +}
> +
> +static void
>  intel_enable_tv(struct intel_encoder *encoder,
>  		struct intel_crtc_state *pipe_config,
>  		struct drm_connector_state *conn_state)
> @@ -873,32 +894,25 @@ intel_disable_tv(struct intel_encoder *encoder,
>  	I915_WRITE(TV_CTL, I915_READ(TV_CTL) & ~TV_ENC_ENABLE);
>  }
>  
> -static const struct tv_mode *
> -intel_tv_mode_lookup(const char *tv_format)
> +static const struct tv_mode *intel_tv_mode_find(struct drm_connector_state *conn_state)
>  {
> -	int i;
> -
> -	for (i = 0; i < ARRAY_SIZE(tv_modes); i++) {
> -		const struct tv_mode *tv_mode = &tv_modes[i];
> +	int format = to_intel_tv_connector_state(conn_state)->format;
>  
> -		if (!strcmp(tv_format, tv_mode->name))
> -			return tv_mode;
> -	}
> -	return NULL;
> +	return &tv_modes[format];
>  }
>  
> -static const struct tv_mode *
> -intel_tv_mode_find(struct intel_tv *intel_tv)
> +static const struct tv_mode *intel_tv_mode_find_committed(struct drm_connector *connector)
>  {
> -	return intel_tv_mode_lookup(intel_tv->tv_format);
> +	int format = intel_attached_tv(connector)->format;
> +
> +	return &tv_modes[format];
>  }
>  
>  static enum drm_mode_status
>  intel_tv_mode_valid(struct drm_connector *connector,
>  		    struct drm_display_mode *mode)
>  {
> -	struct intel_tv *intel_tv = intel_attached_tv(connector);
> -	const struct tv_mode *tv_mode = intel_tv_mode_find(intel_tv);
> +	const struct tv_mode *tv_mode = intel_tv_mode_find_committed(connector);
>  	int max_dotclk = to_i915(connector->dev)->max_dotclk_freq;
>  
>  	if (mode->clock > max_dotclk)
> @@ -925,8 +939,7 @@ intel_tv_compute_config(struct intel_encoder *encoder,
>  			struct intel_crtc_state *pipe_config,
>  			struct drm_connector_state *conn_state)
>  {
> -	struct intel_tv *intel_tv = enc_to_tv(encoder);
> -	const struct tv_mode *tv_mode = intel_tv_mode_find(intel_tv);
> +	const struct tv_mode *tv_mode = intel_tv_mode_find(conn_state);
>  
>  	if (!tv_mode)
>  		return false;
> @@ -1032,7 +1045,7 @@ static void intel_tv_pre_enable(struct intel_encoder *encoder,
>  	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
>  	struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc);
>  	struct intel_tv *intel_tv = enc_to_tv(encoder);
> -	const struct tv_mode *tv_mode = intel_tv_mode_find(intel_tv);
> +	const struct tv_mode *tv_mode = intel_tv_mode_find(conn_state);
>  	u32 tv_ctl;
>  	u32 scctl1, scctl2, scctl3;
>  	int i, j;
> @@ -1041,6 +1054,8 @@ static void intel_tv_pre_enable(struct intel_encoder *encoder,
>  	bool burst_ena;
>  	int xpos = 0x0, ypos = 0x0;
>  	unsigned int xsize, ysize;
> +	struct intel_tv_connector_state *tv_state =
> +		to_intel_tv_connector_state(conn_state);
>  
>  	if (!tv_mode)
>  		return;	/* can't happen (mode_prepare prevents this) */
> @@ -1135,12 +1150,12 @@ static void intel_tv_pre_enable(struct intel_encoder *encoder,
>  	else
>  		ysize = 2*tv_mode->nbr_end + 1;
>  
> -	xpos += intel_tv->margin[TV_MARGIN_LEFT];
> -	ypos += intel_tv->margin[TV_MARGIN_TOP];
> -	xsize -= (intel_tv->margin[TV_MARGIN_LEFT] +
> -		  intel_tv->margin[TV_MARGIN_RIGHT]);
> -	ysize -= (intel_tv->margin[TV_MARGIN_TOP] +
> -		  intel_tv->margin[TV_MARGIN_BOTTOM]);
> +	xpos += tv_state->margin[TV_MARGIN_LEFT];
> +	ypos += tv_state->margin[TV_MARGIN_TOP];
> +	xsize -= (tv_state->margin[TV_MARGIN_LEFT] +
> +		  tv_state->margin[TV_MARGIN_RIGHT]);
> +	ysize -= (tv_state->margin[TV_MARGIN_TOP] +
> +		  tv_state->margin[TV_MARGIN_BOTTOM]);
>  	I915_WRITE(TV_WIN_POS, (xpos<<16)|ypos);
>  	I915_WRITE(TV_WIN_SIZE, (xsize<<16)|ysize);
>  
> @@ -1288,7 +1303,7 @@ intel_tv_detect_type(struct intel_tv *intel_tv,
>  static void intel_tv_find_better_format(struct drm_connector *connector)
>  {
>  	struct intel_tv *intel_tv = intel_attached_tv(connector);
> -	const struct tv_mode *tv_mode = intel_tv_mode_find(intel_tv);
> +	const struct tv_mode *tv_mode = intel_tv_mode_find(connector->state);

intel_tv_mode_find_committed() ?

>  	int i;
>  
>  	if ((intel_tv->type == DRM_MODE_CONNECTOR_Component) ==
> @@ -1304,9 +1319,8 @@ static void intel_tv_find_better_format(struct drm_connector *connector)
>  			break;
>  	}
>  
> -	intel_tv->tv_format = tv_mode->name;
> -	drm_object_property_set_value(&connector->base,
> -		connector->dev->mode_config.tv_mode_property, i);
> +	to_intel_tv_connector_state(connector->state)->format = i;

I was thinking we'd do this in duplicate_state.

With these two changes we shouldn't have to access ->state in detect()
AFAICS.

> +	intel_attached_tv(connector)->format = i;
>  }
>  
>  /**
> @@ -1344,18 +1358,17 @@ intel_tv_detect(struct drm_connector *connector, bool force)
>  		} else
>  			status = connector_status_unknown;
>  
> +		if (status == connector_status_connected) {
> +			intel_tv->type = type;
> +			intel_tv_find_better_format(connector);
> +		}
> +
>  		drm_modeset_drop_locks(&ctx);
>  		drm_modeset_acquire_fini(&ctx);
> -	} else
> -		return connector->status;
>  
> -	if (status != connector_status_connected)
>  		return status;
> -
> -	intel_tv->type = type;
> -	intel_tv_find_better_format(connector);
> -
> -	return connector_status_connected;
> +	} else
> +		return connector->status;
>  }
>  
>  static const struct input_res {
> @@ -1375,12 +1388,9 @@ static const struct input_res {
>   * Chose preferred mode  according to line number of TV format
>   */
>  static void
> -intel_tv_chose_preferred_modes(struct drm_connector *connector,
> +intel_tv_chose_preferred_modes(const struct tv_mode *tv_mode,
>  			       struct drm_display_mode *mode_ptr)
>  {
> -	struct intel_tv *intel_tv = intel_attached_tv(connector);
> -	const struct tv_mode *tv_mode = intel_tv_mode_find(intel_tv);
> -
>  	if (tv_mode->nbr_end < 480 && mode_ptr->vdisplay == 480)
>  		mode_ptr->type |= DRM_MODE_TYPE_PREFERRED;
>  	else if (tv_mode->nbr_end > 480) {
> @@ -1403,8 +1413,7 @@ static int
>  intel_tv_get_modes(struct drm_connector *connector)
>  {
>  	struct drm_display_mode *mode_ptr;
> -	struct intel_tv *intel_tv = intel_attached_tv(connector);
> -	const struct tv_mode *tv_mode = intel_tv_mode_find(intel_tv);
> +	const struct tv_mode *tv_mode = intel_tv_mode_find_committed(connector);
>  	int j, count = 0;
>  	u64 tmp;
>  
> @@ -1447,7 +1456,7 @@ intel_tv_get_modes(struct drm_connector *connector)
>  		mode_ptr->clock = (int) tmp;
>  
>  		mode_ptr->type = DRM_MODE_TYPE_DRIVER;
> -		intel_tv_chose_preferred_modes(connector, mode_ptr);
> +		intel_tv_chose_preferred_modes(tv_mode, mode_ptr);
                         ^^^^^

Pre-existing typo :) Might want to fix that up too.
                 

>  		drm_mode_probed_add(connector, mode_ptr);
>  		count++;
>  	}
> @@ -1462,56 +1471,97 @@ intel_tv_destroy(struct drm_connector *connector)
>  	kfree(connector);
>  }
>  
> -
>  static int
> -intel_tv_set_property(struct drm_connector *connector, struct drm_property *property,
> -		      uint64_t val)
> +intel_tv_atomic_set_property(struct drm_connector *connector,
> +			     struct drm_connector_state *conn_state,
> +			     struct drm_property *property,
> +			     uint64_t val)
>  {
>  	struct drm_device *dev = connector->dev;
> -	struct intel_tv *intel_tv = intel_attached_tv(connector);
> -	struct drm_crtc *crtc = intel_tv->base.base.crtc;
> -	int ret = 0;
> +
> +	struct intel_tv_connector_state *tv_state =
> +		to_intel_tv_connector_state(conn_state);
>  	bool changed = false;
>  
> -	ret = drm_object_property_set_value(&connector->base, property, val);
> -	if (ret < 0)
> -		goto out;
> -
> -	if (property == dev->mode_config.tv_left_margin_property &&
> -		intel_tv->margin[TV_MARGIN_LEFT] != val) {
> -		intel_tv->margin[TV_MARGIN_LEFT] = val;
> -		changed = true;
> -	} else if (property == dev->mode_config.tv_right_margin_property &&
> -		intel_tv->margin[TV_MARGIN_RIGHT] != val) {
> -		intel_tv->margin[TV_MARGIN_RIGHT] = val;
> -		changed = true;
> -	} else if (property == dev->mode_config.tv_top_margin_property &&
> -		intel_tv->margin[TV_MARGIN_TOP] != val) {
> -		intel_tv->margin[TV_MARGIN_TOP] = val;
> -		changed = true;
> -	} else if (property == dev->mode_config.tv_bottom_margin_property &&
> -		intel_tv->margin[TV_MARGIN_BOTTOM] != val) {
> -		intel_tv->margin[TV_MARGIN_BOTTOM] = val;
> -		changed = true;
> +	if (property == dev->mode_config.tv_left_margin_property) {
> +		changed = tv_state->margin[TV_MARGIN_LEFT] != val;
> +
> +		tv_state->margin[TV_MARGIN_LEFT] = val;
> +	} else if (property == dev->mode_config.tv_right_margin_property) {
> +		changed = tv_state->margin[TV_MARGIN_RIGHT] != val;
> +
> +		tv_state->margin[TV_MARGIN_RIGHT] = val;
> +	} else if (property == dev->mode_config.tv_top_margin_property) {
> +		changed = tv_state->margin[TV_MARGIN_TOP] != val;
> +
> +		tv_state->margin[TV_MARGIN_TOP] = val;
> +	} else if (property == dev->mode_config.tv_bottom_margin_property) {
> +		changed = tv_state->margin[TV_MARGIN_BOTTOM] != val;
> +
> +		tv_state->margin[TV_MARGIN_BOTTOM] = val;
>  	} else if (property == dev->mode_config.tv_mode_property) {
>  		if (val >= ARRAY_SIZE(tv_modes)) {
> -			ret = -EINVAL;
> -			goto out;
> +			DRM_DEBUG_ATOMIC("value %llu out of tv_modes array bounds\n", val);
> +
> +			return -EINVAL;
>  		}
> -		if (!strcmp(intel_tv->tv_format, tv_modes[val].name))
> -			goto out;
>  
> -		intel_tv->tv_format = tv_modes[val].name;
> -		changed = true;
> +		changed = tv_state->format != val;
> +		tv_state->format = val;
> +	} else {
> +		DRM_DEBUG_ATOMIC("Unknown atomic property %s\n", property->name);
> +		return -EINVAL;
> +	}
> +
> +	/* Trigger a modeset when connector properties are changed. */
> +	if (changed && conn_state->crtc) {
> +		struct drm_crtc_state *crtc_state =
> +			drm_atomic_get_existing_crtc_state(conn_state->state,
> +							   conn_state->crtc);
> +
> +		crtc_state->connectors_changed = true;
> +	}
> +	return 0;
> +}
> +
> +static int
> +intel_tv_atomic_get_property(struct drm_connector *connector,
> +				    const struct drm_connector_state *state,
> +				    struct drm_property *property,
> +				    uint64_t *val)
> +{
> +	struct drm_device *dev = connector->dev;
> +	struct intel_tv_connector_state *tv_state =
> +		to_intel_tv_connector_state(state);
> +
> +	if (property == dev->mode_config.tv_left_margin_property)
> +		*val = tv_state->margin[TV_MARGIN_LEFT];
> +	else if (property == dev->mode_config.tv_right_margin_property)
> +		*val = tv_state->margin[TV_MARGIN_RIGHT];
> +	else if (property == dev->mode_config.tv_top_margin_property)
> +		*val = tv_state->margin[TV_MARGIN_TOP];
> +	else if (property == dev->mode_config.tv_bottom_margin_property)
> +		*val = tv_state->margin[TV_MARGIN_BOTTOM];
> +	else if (property == dev->mode_config.tv_mode_property) {
> +		*val = tv_state->format;
>  	} else {
> -		ret = -EINVAL;
> -		goto out;
> +		DRM_DEBUG_ATOMIC("Unknown atomic property %s\n", property->name);
> +		return -EINVAL;
>  	}
>  
> -	if (changed && crtc)
> -		intel_crtc_restore_mode(crtc);
> -out:
> -	return ret;
> +	return 0;
> +}
> +
> +static struct drm_connector_state *
> +intel_tv_duplicate_state(struct drm_connector *connector)
> +{
> +	struct intel_tv_connector_state *state;
> +
> +	state = kmemdup(&connector->state, sizeof(*state), GFP_KERNEL);
> +	if (state)
> +		__drm_atomic_helper_connector_duplicate_state(connector, &state->base);
> +
> +	return &state->base;
>  }
>  
>  static const struct drm_connector_funcs intel_tv_connector_funcs = {
> @@ -1520,11 +1570,12 @@ static const struct drm_connector_funcs intel_tv_connector_funcs = {
>  	.late_register = intel_connector_register,
>  	.early_unregister = intel_connector_unregister,
>  	.destroy = intel_tv_destroy,
> -	.set_property = intel_tv_set_property,
> -	.atomic_get_property = intel_connector_atomic_get_property,
> +	.set_property = drm_atomic_helper_connector_set_property,
> +	.atomic_set_property = intel_tv_atomic_set_property,
> +	.atomic_get_property = intel_tv_atomic_get_property,
>  	.fill_modes = drm_helper_probe_single_connector_modes,
>  	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
> -	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
> +	.atomic_duplicate_state = intel_tv_duplicate_state,
>  };
>  
>  static const struct drm_connector_helper_funcs intel_tv_connector_helper_funcs = {
> @@ -1547,6 +1598,7 @@ intel_tv_init(struct drm_i915_private *dev_priv)
>  	u32 tv_dac_on, tv_dac_off, save_tv_dac;
>  	const char *tv_format_names[ARRAY_SIZE(tv_modes)];
>  	int i, initial_mode = 0;
> +	struct intel_tv_connector_state *state;
>  
>  	if ((I915_READ(TV_CTL) & TV_FUSE_STATE_MASK) == TV_FUSE_STATE_DISABLED)
>  		return;
> @@ -1580,16 +1632,17 @@ intel_tv_init(struct drm_i915_private *dev_priv)
>  		return;
>  
>  	intel_tv = kzalloc(sizeof(*intel_tv), GFP_KERNEL);
> -	if (!intel_tv) {
> -		return;
> -	}
> -
> -	intel_connector = intel_connector_alloc();
> -	if (!intel_connector) {
> +	intel_connector = kzalloc(sizeof(*intel_connector), GFP_KERNEL);
> +	state = kzalloc(sizeof(*state), GFP_KERNEL);
> +	if (!intel_tv || !intel_connector || !state) {
> +		kfree(intel_connector);
> +		kfree(state);
>  		kfree(intel_tv);
>  		return;
>  	}
>  
> +	__drm_atomic_helper_connector_reset(&intel_connector->base, &state->base);
> +
>  	intel_encoder = &intel_tv->base;
>  	connector = &intel_connector->base;
>  
> @@ -1617,6 +1670,7 @@ intel_tv_init(struct drm_i915_private *dev_priv)
>  	intel_encoder->disable = intel_disable_tv;
>  	intel_encoder->get_hw_state = intel_tv_get_hw_state;
>  	intel_connector->get_hw_state = intel_connector_get_hw_state;
> +	intel_connector->swap_state = intel_tv_swap_state;
>  
>  	intel_connector_attach_encoder(intel_connector, intel_encoder);
>  
> @@ -1629,12 +1683,13 @@ intel_tv_init(struct drm_i915_private *dev_priv)
>  	intel_tv->type = DRM_MODE_CONNECTOR_Unknown;
>  
>  	/* BIOS margin values */
> -	intel_tv->margin[TV_MARGIN_LEFT] = 54;
> -	intel_tv->margin[TV_MARGIN_TOP] = 36;
> -	intel_tv->margin[TV_MARGIN_RIGHT] = 46;
> -	intel_tv->margin[TV_MARGIN_BOTTOM] = 37;
> +	state->margin[TV_MARGIN_LEFT] = 54;
> +	state->margin[TV_MARGIN_TOP] = 36;
> +	state->margin[TV_MARGIN_RIGHT] = 46;
> +	state->margin[TV_MARGIN_BOTTOM] = 37;
>  
> -	intel_tv->tv_format = tv_modes[initial_mode].name;
> +	state->format = initial_mode;
> +	intel_tv->format = initial_mode;
>  
>  	drm_connector_helper_add(connector, &intel_tv_connector_helper_funcs);
>  	connector->interlace_allowed = false;
> @@ -1648,17 +1703,17 @@ intel_tv_init(struct drm_i915_private *dev_priv)
>  				      tv_format_names);
>  
>  	drm_object_attach_property(&connector->base, dev->mode_config.tv_mode_property,
> -				   initial_mode);
> +				   state->format);
>  	drm_object_attach_property(&connector->base,
>  				   dev->mode_config.tv_left_margin_property,
> -				   intel_tv->margin[TV_MARGIN_LEFT]);
> +				   state->margin[TV_MARGIN_LEFT]);
>  	drm_object_attach_property(&connector->base,
>  				   dev->mode_config.tv_top_margin_property,
> -				   intel_tv->margin[TV_MARGIN_TOP]);
> +				   state->margin[TV_MARGIN_TOP]);
>  	drm_object_attach_property(&connector->base,
>  				   dev->mode_config.tv_right_margin_property,
> -				   intel_tv->margin[TV_MARGIN_RIGHT]);
> +				   state->margin[TV_MARGIN_RIGHT]);
>  	drm_object_attach_property(&connector->base,
>  				   dev->mode_config.tv_bottom_margin_property,
> -				   intel_tv->margin[TV_MARGIN_BOTTOM]);
> +				   state->margin[TV_MARGIN_BOTTOM]);
>  }
> -- 
> 2.7.4
> 

-- 
Ville Syrjälä
Intel OTC
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