diff options
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/DocBook/drm.tmpl | 36 | ||||
| -rw-r--r-- | Documentation/devicetree/bindings/gpu/nvidia,tegra20-host1x.txt | 2 |
2 files changed, 38 insertions, 0 deletions
diff --git a/Documentation/DocBook/drm.tmpl b/Documentation/DocBook/drm.tmpl index efef63717ef6..d95027f6e977 100644 --- a/Documentation/DocBook/drm.tmpl +++ b/Documentation/DocBook/drm.tmpl @@ -142,6 +142,12 @@ to register it with the DRM subsystem. </para> <para> + Newer drivers that no longer require a <structname>drm_bus</structname> + structure can alternatively use the low-level device initialization and + registration functions such as <function>drm_dev_alloc()</function> and + <function>drm_dev_register()</function> directly. + </para> + <para> The <structname>drm_driver</structname> structure contains static information that describes the driver and features it supports, and pointers to methods that the DRM core will call to implement the DRM API. @@ -282,6 +288,36 @@ char *date;</synopsis> </sect3> </sect2> <sect2> + <title>Device Registration</title> + <para> + A number of functions are provided to help with device registration. + The functions deal with PCI, USB and platform devices, respectively. + </para> +!Edrivers/gpu/drm/drm_pci.c +!Edrivers/gpu/drm/drm_usb.c +!Edrivers/gpu/drm/drm_platform.c + <para> + New drivers that no longer rely on the services provided by the + <structname>drm_bus</structname> structure can call the low-level + device registration functions directly. The + <function>drm_dev_alloc()</function> function can be used to allocate + and initialize a new <structname>drm_device</structname> structure. + Drivers will typically want to perform some additional setup on this + structure, such as allocating driver-specific data and storing a + pointer to it in the DRM device's <structfield>dev_private</structfield> + field. Drivers should also set the device's unique name using the + <function>drm_dev_set_unique()</function> function. After it has been + set up a device can be registered with the DRM subsystem by calling + <function>drm_dev_register()</function>. This will cause the device to + be exposed to userspace and will call the driver's + <structfield>.load()</structfield> implementation. When a device is + removed, the DRM device can safely be unregistered and freed by calling + <function>drm_dev_unregister()</function> followed by a call to + <function>drm_dev_unref()</function>. + </para> +!Edrivers/gpu/drm/drm_stub.c + </sect2> + <sect2> <title>Driver Load</title> <para> The <methodname>load</methodname> method is the driver and device diff --git a/Documentation/devicetree/bindings/gpu/nvidia,tegra20-host1x.txt b/Documentation/devicetree/bindings/gpu/nvidia,tegra20-host1x.txt index efa8b8451f93..b48f4ef31d93 100644 --- a/Documentation/devicetree/bindings/gpu/nvidia,tegra20-host1x.txt +++ b/Documentation/devicetree/bindings/gpu/nvidia,tegra20-host1x.txt @@ -136,6 +136,7 @@ of the following host1x client modules: - compatible: "nvidia,tegra<chip>-hdmi" - reg: Physical base address and length of the controller's registers. - interrupts: The interrupt outputs from the controller. + - hdmi-supply: supply for the +5V HDMI connector pin - vdd-supply: regulator for supply voltage - pll-supply: regulator for PLL - clocks: Must contain an entry for each entry in clock-names. @@ -180,6 +181,7 @@ of the following host1x client modules: See ../reset/reset.txt for details. - reset-names: Must include the following entries: - dsi + - avdd-dsi-supply: phandle of a supply that powers the DSI controller - nvidia,mipi-calibrate: Should contain a phandle and a specifier specifying which pads are used by this DSI output and need to be calibrated. See also ../mipi/nvidia,tegra114-mipi.txt. |