[Intel-gfx] [PATCH v2 3/7] drm/i915/hdcp: HDCP2.x Refactoring to agnotic cp f/w
Jani Nikula
jani.nikula at linux.intel.com
Tue Dec 13 10:40:42 UTC 2022
On Tue, 13 Dec 2022, Suraj Kandpal <suraj.kandpal at intel.com> wrote:
> From: Anshuman Gupta <anshuman.gupta at intel.com>
>
> As now we have more then one type of content protection
> secrity firmware. Let change the i915_cp_fw_hdcp_interface.h
> header naming convention to suit generic f/w type.
> %s/MEI_/FW_
> %s/mei_fw/cp_fw
> %s/mei_dev/fw_dev
>
> As interface to CP FW can be either a non i915 component or
> i915 intergral component, change structure name Accordingly.
> %s/i915_hdcp_comp_master/i915_hdcp_fw_master
> %s/i915_hdcp_component_ops/i915_hdcp_fw_ops
Why not drop the fw part here too? Just take a step further and make the
interface agnostic to being about firmware.
fw_dev -> hdcp_dev
enum cp_fw_ddi -> enum hdcp_port
enum cp_fw_tc -> enum hdcp_transcoder
enumerator values accordingly, with a sensible prefix.
For naming, try saying the names aloud, as if you were discussing this
on the phone with someone. "enum cp_fw_tc" just does not work.
BR,
Jani.
>
> Cc: Tomas Winkler <tomas.winkler at intel.com>
> Cc: Rodrigo Vivi <rodrigo.vivi at intel.com>
> Cc: Uma Shankar <uma.shankar at intel.com>
> Cc: Ankit Nautiyal <ankit.k.nautiyal at intel.com>
> Signed-off-by: Anshuman Gupta <anshuman.gupta at intel.com>
> Signed-off-by: Suraj Kandpal <suraj.kandpal at intel.com>
> ---
> .../gpu/drm/i915/display/intel_display_core.h | 3 +-
> drivers/gpu/drm/i915/display/intel_hdcp.c | 66 ++++++++---------
> drivers/misc/mei/hdcp/mei_hdcp.c | 12 ++--
> include/drm/i915_cp_fw_hdcp_interface.h | 70 +++++++++----------
> 4 files changed, 76 insertions(+), 75 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_display_core.h b/drivers/gpu/drm/i915/display/intel_display_core.h
> index 57ddce3ba02b..a769cc8e2745 100644
> --- a/drivers/gpu/drm/i915/display/intel_display_core.h
> +++ b/drivers/gpu/drm/i915/display/intel_display_core.h
> @@ -16,6 +16,7 @@
> #include <drm/drm_connector.h>
> #include <drm/drm_modeset_lock.h>
>
> +#include "i915/i915_cp_fw_hdcp_interface.h"
> #include "intel_cdclk.h"
> #include "intel_display.h"
> #include "intel_display_power.h"
> @@ -368,7 +369,7 @@ struct intel_display {
> } gmbus;
>
> struct {
> - struct i915_hdcp_comp_master *master;
> + struct i915_hdcp_fw_master *master;
> bool comp_added;
>
> /* Mutex to protect the above hdcp component related values. */
> diff --git a/drivers/gpu/drm/i915/display/intel_hdcp.c b/drivers/gpu/drm/i915/display/intel_hdcp.c
> index 6406fd487ee5..e856b10948ab 100644
> --- a/drivers/gpu/drm/i915/display/intel_hdcp.c
> +++ b/drivers/gpu/drm/i915/display/intel_hdcp.c
> @@ -1143,7 +1143,7 @@ hdcp2_prepare_ake_init(struct intel_connector *connector,
> struct intel_digital_port *dig_port = intel_attached_dig_port(connector);
> struct hdcp_port_data *data = &dig_port->hdcp_port_data;
> struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
> - struct i915_hdcp_comp_master *comp;
> + struct i915_hdcp_fw_master *comp;
> int ret;
>
> mutex_lock(&dev_priv->display.hdcp.comp_mutex);
> @@ -1154,7 +1154,7 @@ hdcp2_prepare_ake_init(struct intel_connector *connector,
> return -EINVAL;
> }
>
> - ret = comp->ops->initiate_hdcp2_session(comp->mei_dev, data, ake_data);
> + ret = comp->ops->initiate_hdcp2_session(comp->fw_dev, data, ake_data);
> if (ret)
> drm_dbg_kms(&dev_priv->drm, "Prepare_ake_init failed. %d\n",
> ret);
> @@ -1173,7 +1173,7 @@ hdcp2_verify_rx_cert_prepare_km(struct intel_connector *connector,
> struct intel_digital_port *dig_port = intel_attached_dig_port(connector);
> struct hdcp_port_data *data = &dig_port->hdcp_port_data;
> struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
> - struct i915_hdcp_comp_master *comp;
> + struct i915_hdcp_fw_master *comp;
> int ret;
>
> mutex_lock(&dev_priv->display.hdcp.comp_mutex);
> @@ -1184,7 +1184,7 @@ hdcp2_verify_rx_cert_prepare_km(struct intel_connector *connector,
> return -EINVAL;
> }
>
> - ret = comp->ops->verify_receiver_cert_prepare_km(comp->mei_dev, data,
> + ret = comp->ops->verify_receiver_cert_prepare_km(comp->fw_dev, data,
> rx_cert, paired,
> ek_pub_km, msg_sz);
> if (ret < 0)
> @@ -1201,7 +1201,7 @@ static int hdcp2_verify_hprime(struct intel_connector *connector,
> struct intel_digital_port *dig_port = intel_attached_dig_port(connector);
> struct hdcp_port_data *data = &dig_port->hdcp_port_data;
> struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
> - struct i915_hdcp_comp_master *comp;
> + struct i915_hdcp_fw_master *comp;
> int ret;
>
> mutex_lock(&dev_priv->display.hdcp.comp_mutex);
> @@ -1212,7 +1212,7 @@ static int hdcp2_verify_hprime(struct intel_connector *connector,
> return -EINVAL;
> }
>
> - ret = comp->ops->verify_hprime(comp->mei_dev, data, rx_hprime);
> + ret = comp->ops->verify_hprime(comp->fw_dev, data, rx_hprime);
> if (ret < 0)
> drm_dbg_kms(&dev_priv->drm, "Verify hprime failed. %d\n", ret);
> mutex_unlock(&dev_priv->display.hdcp.comp_mutex);
> @@ -1227,7 +1227,7 @@ hdcp2_store_pairing_info(struct intel_connector *connector,
> struct intel_digital_port *dig_port = intel_attached_dig_port(connector);
> struct hdcp_port_data *data = &dig_port->hdcp_port_data;
> struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
> - struct i915_hdcp_comp_master *comp;
> + struct i915_hdcp_fw_master *comp;
> int ret;
>
> mutex_lock(&dev_priv->display.hdcp.comp_mutex);
> @@ -1238,7 +1238,7 @@ hdcp2_store_pairing_info(struct intel_connector *connector,
> return -EINVAL;
> }
>
> - ret = comp->ops->store_pairing_info(comp->mei_dev, data, pairing_info);
> + ret = comp->ops->store_pairing_info(comp->fw_dev, data, pairing_info);
> if (ret < 0)
> drm_dbg_kms(&dev_priv->drm, "Store pairing info failed. %d\n",
> ret);
> @@ -1254,7 +1254,7 @@ hdcp2_prepare_lc_init(struct intel_connector *connector,
> struct intel_digital_port *dig_port = intel_attached_dig_port(connector);
> struct hdcp_port_data *data = &dig_port->hdcp_port_data;
> struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
> - struct i915_hdcp_comp_master *comp;
> + struct i915_hdcp_fw_master *comp;
> int ret;
>
> mutex_lock(&dev_priv->display.hdcp.comp_mutex);
> @@ -1265,7 +1265,7 @@ hdcp2_prepare_lc_init(struct intel_connector *connector,
> return -EINVAL;
> }
>
> - ret = comp->ops->initiate_locality_check(comp->mei_dev, data, lc_init);
> + ret = comp->ops->initiate_locality_check(comp->fw_dev, data, lc_init);
> if (ret < 0)
> drm_dbg_kms(&dev_priv->drm, "Prepare lc_init failed. %d\n",
> ret);
> @@ -1281,7 +1281,7 @@ hdcp2_verify_lprime(struct intel_connector *connector,
> struct intel_digital_port *dig_port = intel_attached_dig_port(connector);
> struct hdcp_port_data *data = &dig_port->hdcp_port_data;
> struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
> - struct i915_hdcp_comp_master *comp;
> + struct i915_hdcp_fw_master *comp;
> int ret;
>
> mutex_lock(&dev_priv->display.hdcp.comp_mutex);
> @@ -1292,7 +1292,7 @@ hdcp2_verify_lprime(struct intel_connector *connector,
> return -EINVAL;
> }
>
> - ret = comp->ops->verify_lprime(comp->mei_dev, data, rx_lprime);
> + ret = comp->ops->verify_lprime(comp->fw_dev, data, rx_lprime);
> if (ret < 0)
> drm_dbg_kms(&dev_priv->drm, "Verify L_Prime failed. %d\n",
> ret);
> @@ -1307,7 +1307,7 @@ static int hdcp2_prepare_skey(struct intel_connector *connector,
> struct intel_digital_port *dig_port = intel_attached_dig_port(connector);
> struct hdcp_port_data *data = &dig_port->hdcp_port_data;
> struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
> - struct i915_hdcp_comp_master *comp;
> + struct i915_hdcp_fw_master *comp;
> int ret;
>
> mutex_lock(&dev_priv->display.hdcp.comp_mutex);
> @@ -1318,7 +1318,7 @@ static int hdcp2_prepare_skey(struct intel_connector *connector,
> return -EINVAL;
> }
>
> - ret = comp->ops->get_session_key(comp->mei_dev, data, ske_data);
> + ret = comp->ops->get_session_key(comp->fw_dev, data, ske_data);
> if (ret < 0)
> drm_dbg_kms(&dev_priv->drm, "Get session key failed. %d\n",
> ret);
> @@ -1336,7 +1336,7 @@ hdcp2_verify_rep_topology_prepare_ack(struct intel_connector *connector,
> struct intel_digital_port *dig_port = intel_attached_dig_port(connector);
> struct hdcp_port_data *data = &dig_port->hdcp_port_data;
> struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
> - struct i915_hdcp_comp_master *comp;
> + struct i915_hdcp_fw_master *comp;
> int ret;
>
> mutex_lock(&dev_priv->display.hdcp.comp_mutex);
> @@ -1347,7 +1347,7 @@ hdcp2_verify_rep_topology_prepare_ack(struct intel_connector *connector,
> return -EINVAL;
> }
>
> - ret = comp->ops->repeater_check_flow_prepare_ack(comp->mei_dev, data,
> + ret = comp->ops->repeater_check_flow_prepare_ack(comp->fw_dev, data,
> rep_topology,
> rep_send_ack);
> if (ret < 0)
> @@ -1365,7 +1365,7 @@ hdcp2_verify_mprime(struct intel_connector *connector,
> struct intel_digital_port *dig_port = intel_attached_dig_port(connector);
> struct hdcp_port_data *data = &dig_port->hdcp_port_data;
> struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
> - struct i915_hdcp_comp_master *comp;
> + struct i915_hdcp_fw_master *comp;
> int ret;
>
> mutex_lock(&dev_priv->display.hdcp.comp_mutex);
> @@ -1376,7 +1376,7 @@ hdcp2_verify_mprime(struct intel_connector *connector,
> return -EINVAL;
> }
>
> - ret = comp->ops->verify_mprime(comp->mei_dev, data, stream_ready);
> + ret = comp->ops->verify_mprime(comp->fw_dev, data, stream_ready);
> if (ret < 0)
> drm_dbg_kms(&dev_priv->drm, "Verify mprime failed. %d\n", ret);
> mutex_unlock(&dev_priv->display.hdcp.comp_mutex);
> @@ -1389,7 +1389,7 @@ static int hdcp2_authenticate_port(struct intel_connector *connector)
> struct intel_digital_port *dig_port = intel_attached_dig_port(connector);
> struct hdcp_port_data *data = &dig_port->hdcp_port_data;
> struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
> - struct i915_hdcp_comp_master *comp;
> + struct i915_hdcp_fw_master *comp;
> int ret;
>
> mutex_lock(&dev_priv->display.hdcp.comp_mutex);
> @@ -1400,7 +1400,7 @@ static int hdcp2_authenticate_port(struct intel_connector *connector)
> return -EINVAL;
> }
>
> - ret = comp->ops->enable_hdcp_authentication(comp->mei_dev, data);
> + ret = comp->ops->enable_hdcp_authentication(comp->fw_dev, data);
> if (ret < 0)
> drm_dbg_kms(&dev_priv->drm, "Enable hdcp auth failed. %d\n",
> ret);
> @@ -1413,7 +1413,7 @@ static int hdcp2_close_mei_session(struct intel_connector *connector)
> {
> struct intel_digital_port *dig_port = intel_attached_dig_port(connector);
> struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
> - struct i915_hdcp_comp_master *comp;
> + struct i915_hdcp_fw_master *comp;
> int ret;
>
> mutex_lock(&dev_priv->display.hdcp.comp_mutex);
> @@ -1424,7 +1424,7 @@ static int hdcp2_close_mei_session(struct intel_connector *connector)
> return -EINVAL;
> }
>
> - ret = comp->ops->close_hdcp_session(comp->mei_dev,
> + ret = comp->ops->close_hdcp_session(comp->fw_dev,
> &dig_port->hdcp_port_data);
> mutex_unlock(&dev_priv->display.hdcp.comp_mutex);
>
> @@ -2145,8 +2145,8 @@ static int i915_hdcp_component_bind(struct device *i915_kdev,
>
> drm_dbg(&dev_priv->drm, "I915 HDCP comp bind\n");
> mutex_lock(&dev_priv->display.hdcp.comp_mutex);
> - dev_priv->display.hdcp.master = (struct i915_hdcp_comp_master *)data;
> - dev_priv->display.hdcp.master->mei_dev = mei_kdev;
> + dev_priv->display.hdcp.master = (struct i915_hdcp_fw_master *)data;
> + dev_priv->display.hdcp.master->fw_dev = mei_kdev;
> mutex_unlock(&dev_priv->display.hdcp.comp_mutex);
>
> return 0;
> @@ -2168,25 +2168,25 @@ static const struct component_ops i915_hdcp_component_ops = {
> .unbind = i915_hdcp_component_unbind,
> };
>
> -static enum mei_fw_ddi intel_get_mei_fw_ddi_index(enum port port)
> +static enum cp_fw_ddi intel_get_mei_fw_ddi_index(enum port port)
> {
> switch (port) {
> case PORT_A:
> - return MEI_DDI_A;
> + return FW_DDI_A;
> case PORT_B ... PORT_F:
> - return (enum mei_fw_ddi)port;
> + return (enum cp_fw_ddi)port;
> default:
> - return MEI_DDI_INVALID_PORT;
> + return FW_DDI_INVALID_PORT;
> }
> }
>
> -static enum mei_fw_tc intel_get_mei_fw_tc(enum transcoder cpu_transcoder)
> +static enum cp_fw_tc intel_get_mei_fw_tc(enum transcoder cpu_transcoder)
> {
> switch (cpu_transcoder) {
> case TRANSCODER_A ... TRANSCODER_D:
> - return (enum mei_fw_tc)(cpu_transcoder | 0x10);
> + return (enum cp_fw_tc)(cpu_transcoder | 0x10);
> default: /* eDP, DSI TRANSCODERS are non HDCP capable */
> - return MEI_INVALID_TRANSCODER;
> + return FW_INVALID_TRANSCODER;
> }
> }
>
> @@ -2206,14 +2206,14 @@ static int initialize_hdcp_port_data(struct intel_connector *connector,
> * As per ME FW API expectation, for GEN 12+, fw_ddi is filled
> * with zero(INVALID PORT index).
> */
> - data->fw_ddi = MEI_DDI_INVALID_PORT;
> + data->fw_ddi = FW_DDI_INVALID_PORT;
>
> /*
> * As associated transcoder is set and modified at modeset, here fw_tc
> * is initialized to zero (invalid transcoder index). This will be
> * retained for <Gen12 forever.
> */
> - data->fw_tc = MEI_INVALID_TRANSCODER;
> + data->fw_tc = FW_INVALID_TRANSCODER;
>
> data->port_type = (u8)HDCP_PORT_TYPE_INTEGRATED;
> data->protocol = (u8)shim->protocol;
> diff --git a/drivers/misc/mei/hdcp/mei_hdcp.c b/drivers/misc/mei/hdcp/mei_hdcp.c
> index 7e3cd3fd7f7b..7ca8b739cd31 100644
> --- a/drivers/misc/mei/hdcp/mei_hdcp.c
> +++ b/drivers/misc/mei/hdcp/mei_hdcp.c
> @@ -715,7 +715,7 @@ mei_hdcp_close_session(struct device *dev, struct hdcp_port_data *data)
> return 0;
> }
>
> -static const struct i915_hdcp_component_ops mei_hdcp_ops = {
> +static const struct i915_hdcp_fw_ops mei_hdcp_ops = {
> .owner = THIS_MODULE,
> .initiate_hdcp2_session = mei_hdcp_initiate_session,
> .verify_receiver_cert_prepare_km =
> @@ -735,13 +735,13 @@ static const struct i915_hdcp_component_ops mei_hdcp_ops = {
> static int mei_component_master_bind(struct device *dev)
> {
> struct mei_cl_device *cldev = to_mei_cl_device(dev);
> - struct i915_hdcp_comp_master *comp_master =
> + struct i915_hdcp_fw_master *comp_master =
> mei_cldev_get_drvdata(cldev);
> int ret;
>
> dev_dbg(dev, "%s\n", __func__);
> comp_master->ops = &mei_hdcp_ops;
> - comp_master->mei_dev = dev;
> + comp_master->fw_dev = dev;
> ret = component_bind_all(dev, comp_master);
> if (ret < 0)
> return ret;
> @@ -752,7 +752,7 @@ static int mei_component_master_bind(struct device *dev)
> static void mei_component_master_unbind(struct device *dev)
> {
> struct mei_cl_device *cldev = to_mei_cl_device(dev);
> - struct i915_hdcp_comp_master *comp_master =
> + struct i915_hdcp_fw_master *comp_master =
> mei_cldev_get_drvdata(cldev);
>
> dev_dbg(dev, "%s\n", __func__);
> @@ -801,7 +801,7 @@ static int mei_hdcp_component_match(struct device *dev, int subcomponent,
> static int mei_hdcp_probe(struct mei_cl_device *cldev,
> const struct mei_cl_device_id *id)
> {
> - struct i915_hdcp_comp_master *comp_master;
> + struct i915_hdcp_fw_master *comp_master;
> struct component_match *master_match;
> int ret;
>
> @@ -846,7 +846,7 @@ static int mei_hdcp_probe(struct mei_cl_device *cldev,
>
> static void mei_hdcp_remove(struct mei_cl_device *cldev)
> {
> - struct i915_hdcp_comp_master *comp_master =
> + struct i915_hdcp_fw_master *comp_master =
> mei_cldev_get_drvdata(cldev);
> int ret;
>
> diff --git a/include/drm/i915_cp_fw_hdcp_interface.h b/include/drm/i915_cp_fw_hdcp_interface.h
> index e5dc6b985b2f..3abfe6d414b8 100644
> --- a/include/drm/i915_cp_fw_hdcp_interface.h
> +++ b/include/drm/i915_cp_fw_hdcp_interface.h
> @@ -41,38 +41,38 @@ enum hdcp_wired_protocol {
> HDCP_PROTOCOL_DP
> };
>
> -enum mei_fw_ddi {
> - MEI_DDI_INVALID_PORT = 0x0,
> +enum cp_fw_ddi {
> + FW_DDI_INVALID_PORT = 0x0,
>
> - MEI_DDI_B = 1,
> - MEI_DDI_C,
> - MEI_DDI_D,
> - MEI_DDI_E,
> - MEI_DDI_F,
> - MEI_DDI_A = 7,
> - MEI_DDI_RANGE_END = MEI_DDI_A,
> + FW_DDI_B = 1,
> + FW_DDI_C,
> + FW_DDI_D,
> + FW_DDI_E,
> + FW_DDI_F,
> + FW_DDI_A = 7,
> + FW_DDI_RANGE_END = FW_DDI_A,
> };
>
> /**
> * enum mei_fw_tc - ME Firmware defined index for transcoders
> - * @MEI_INVALID_TRANSCODER: Index for Invalid transcoder
> - * @MEI_TRANSCODER_EDP: Index for EDP Transcoder
> - * @MEI_TRANSCODER_DSI0: Index for DSI0 Transcoder
> - * @MEI_TRANSCODER_DSI1: Index for DSI1 Transcoder
> - * @MEI_TRANSCODER_A: Index for Transcoder A
> - * @MEI_TRANSCODER_B: Index for Transcoder B
> - * @MEI_TRANSCODER_C: Index for Transcoder C
> - * @MEI_TRANSCODER_D: Index for Transcoder D
> + * @FW_INVALID_TRANSCODER: Index for Invalid transcoder
> + * @FW_TRANSCODER_EDP: Index for EDP Transcoder
> + * @FW_TRANSCODER_DSI0: Index for DSI0 Transcoder
> + * @FW_TRANSCODER_DSI1: Index for DSI1 Transcoder
> + * @FW_TRANSCODER_A: Index for Transcoder A
> + * @FW_TRANSCODER_B: Index for Transcoder B
> + * @FW_TRANSCODER_C: Index for Transcoder C
> + * @FW_TRANSCODER_D: Index for Transcoder D
> */
> -enum mei_fw_tc {
> - MEI_INVALID_TRANSCODER = 0x00,
> - MEI_TRANSCODER_EDP,
> - MEI_TRANSCODER_DSI0,
> - MEI_TRANSCODER_DSI1,
> - MEI_TRANSCODER_A = 0x10,
> - MEI_TRANSCODER_B,
> - MEI_TRANSCODER_C,
> - MEI_TRANSCODER_D
> +enum cp_fw_tc {
> + FW_INVALID_TRANSCODER = 0x00,
> + FW_TRANSCODER_EDP,
> + FW_TRANSCODER_DSI0,
> + FW_TRANSCODER_DSI1,
> + FW_TRANSCODER_A = 0x10,
> + FW_TRANSCODER_B,
> + FW_TRANSCODER_C,
> + FW_TRANSCODER_D
> };
>
> /**
> @@ -90,8 +90,8 @@ enum mei_fw_tc {
> * streams
> */
> struct hdcp_port_data {
> - enum mei_fw_ddi fw_ddi;
> - enum mei_fw_tc fw_tc;
> + enum cp_fw_ddi fw_ddi;
> + enum cp_fw_tc fw_tc;
> u8 port_type;
> u8 protocol;
> u16 k;
> @@ -119,7 +119,7 @@ struct hdcp_port_data {
> * @close_hdcp_session: Close the Wired HDCP Tx session per port.
> * This also disables the authenticated state of the port.
> */
> -struct i915_hdcp_component_ops {
> +struct i915_hdcp_fw_ops {
> /**
> * @owner: mei_hdcp module
> */
> @@ -168,14 +168,14 @@ struct i915_hdcp_component_ops {
> };
>
> /**
> - * struct i915_hdcp_component_master - Used for communication between i915
> - * and mei_hdcp drivers for the HDCP2.2 services
> - * @mei_dev: device that provide the HDCP2.2 service from MEI Bus.
> + * struct i915_hdcp_fw_master - Used for communication between i915
> + * and cp fw hdcp intf driver like mei_hdcp for the HDCP2.2 services
> + * @fw_dev: device that provide the HDCP2.2 service from CP FW interface.
> * @hdcp_ops: Ops implemented by mei_hdcp driver, used by i915 driver.
> */
> -struct i915_hdcp_comp_master {
> - struct device *mei_dev;
> - const struct i915_hdcp_component_ops *ops;
> +struct i915_hdcp_fw_master {
> + struct device *fw_dev;
> + const struct i915_hdcp_fw_ops *ops;
>
> /* To protect the above members. */
> struct mutex mutex;
--
Jani Nikula, Intel Open Source Graphics Center
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