drm/radeon: document radeon_kms.c
Adds documentation to most of the functions in radeon_kms.c Signed-off-by: Alex Deucher <alexander.deucher@amd.com> Reviewed-by: Christian König <christian.koenig@amd.com>
This commit is contained in:
Alex Deucher
Christian König
parent
0c1951192a
commit
f482a14195
@ -33,6 +33,17 @@
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#include <linux/vga_switcheroo.h>
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#include <linux/slab.h>
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/**
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* radeon_driver_unload_kms - Main unload function for KMS.
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*
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* @dev: drm dev pointer
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*
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* This is the main unload function for KMS (all asics).
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* It calls radeon_modeset_fini() to tear down the
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* displays, and radeon_device_fini() to tear down
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* the rest of the device (CP, writeback, etc.).
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* Returns 0 on success.
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*/
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int radeon_driver_unload_kms(struct drm_device *dev)
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{
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struct radeon_device *rdev = dev->dev_private;
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@ -46,6 +57,19 @@ int radeon_driver_unload_kms(struct drm_device *dev)
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return 0;
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}
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/**
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* radeon_driver_load_kms - Main load function for KMS.
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*
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* @dev: drm dev pointer
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* @flags: device flags
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*
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* This is the main load function for KMS (all asics).
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* It calls radeon_device_init() to set up the non-display
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* parts of the chip (asic init, CP, writeback, etc.), and
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* radeon_modeset_init() to set up the display parts
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* (crtcs, encoders, hotplug detect, etc.).
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* Returns 0 on success, error on failure.
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*/
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int radeon_driver_load_kms(struct drm_device *dev, unsigned long flags)
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{
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struct radeon_device *rdev;
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@ -96,6 +120,16 @@ out:
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return r;
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}
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/**
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* radeon_set_filp_rights - Set filp right.
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*
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* @dev: drm dev pointer
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* @owner: drm file
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* @applier: drm file
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* @value: value
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*
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* Sets the filp rights for the device (all asics).
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*/
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static void radeon_set_filp_rights(struct drm_device *dev,
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struct drm_file **owner,
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struct drm_file *applier,
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@ -118,6 +152,18 @@ static void radeon_set_filp_rights(struct drm_device *dev,
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/*
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* Userspace get information ioctl
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*/
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/**
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* radeon_info_ioctl - answer a device specific request.
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*
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* @rdev: radeon device pointer
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* @data: request object
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* @filp: drm filp
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*
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* This function is used to pass device specific parameters to the userspace
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* drivers. Examples include: pci device id, pipeline parms, tiling params,
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* etc. (all asics).
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* Returns 0 on success, -EINVAL on failure.
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*/
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int radeon_info_ioctl(struct drm_device *dev, void *data, struct drm_file *filp)
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{
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struct radeon_device *rdev = dev->dev_private;
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@ -301,16 +347,40 @@ int radeon_info_ioctl(struct drm_device *dev, void *data, struct drm_file *filp)
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/*
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* Outdated mess for old drm with Xorg being in charge (void function now).
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*/
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/**
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* radeon_driver_firstopen_kms - drm callback for first open
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*
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* @dev: drm dev pointer
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*
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* Nothing to be done for KMS (all asics).
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* Returns 0 on success.
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*/
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int radeon_driver_firstopen_kms(struct drm_device *dev)
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{
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return 0;
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}
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/**
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* radeon_driver_firstopen_kms - drm callback for last close
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*
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* @dev: drm dev pointer
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*
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* Switch vga switcheroo state after last close (all asics).
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*/
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void radeon_driver_lastclose_kms(struct drm_device *dev)
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{
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vga_switcheroo_process_delayed_switch();
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}
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/**
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* radeon_driver_open_kms - drm callback for open
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*
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* @dev: drm dev pointer
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* @file_priv: drm file
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*
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* On device open, init vm on cayman+ (all asics).
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* Returns 0 on success, error on failure.
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*/
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int radeon_driver_open_kms(struct drm_device *dev, struct drm_file *file_priv)
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{
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struct radeon_device *rdev = dev->dev_private;
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@ -339,6 +409,14 @@ int radeon_driver_open_kms(struct drm_device *dev, struct drm_file *file_priv)
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return 0;
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}
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/**
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* radeon_driver_postclose_kms - drm callback for post close
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*
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* @dev: drm dev pointer
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* @file_priv: drm file
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*
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* On device post close, tear down vm on cayman+ (all asics).
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*/
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void radeon_driver_postclose_kms(struct drm_device *dev,
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struct drm_file *file_priv)
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{
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@ -354,6 +432,15 @@ void radeon_driver_postclose_kms(struct drm_device *dev,
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}
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}
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/**
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* radeon_driver_preclose_kms - drm callback for pre close
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*
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* @dev: drm dev pointer
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* @file_priv: drm file
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*
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* On device pre close, tear down hyperz and cmask filps on r1xx-r5xx
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* (all asics).
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*/
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void radeon_driver_preclose_kms(struct drm_device *dev,
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struct drm_file *file_priv)
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{
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@ -367,6 +454,15 @@ void radeon_driver_preclose_kms(struct drm_device *dev,
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/*
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* VBlank related functions.
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*/
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/**
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* radeon_get_vblank_counter_kms - get frame count
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*
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* @dev: drm dev pointer
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* @crtc: crtc to get the frame count from
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*
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* Gets the frame count on the requested crtc (all asics).
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* Returns frame count on success, -EINVAL on failure.
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*/
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u32 radeon_get_vblank_counter_kms(struct drm_device *dev, int crtc)
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{
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struct radeon_device *rdev = dev->dev_private;
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@ -379,6 +475,15 @@ u32 radeon_get_vblank_counter_kms(struct drm_device *dev, int crtc)
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return radeon_get_vblank_counter(rdev, crtc);
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}
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/**
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* radeon_enable_vblank_kms - enable vblank interrupt
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*
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* @dev: drm dev pointer
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* @crtc: crtc to enable vblank interrupt for
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*
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* Enable the interrupt on the requested crtc (all asics).
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* Returns 0 on success, -EINVAL on failure.
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*/
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int radeon_enable_vblank_kms(struct drm_device *dev, int crtc)
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{
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struct radeon_device *rdev = dev->dev_private;
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@ -397,6 +502,14 @@ int radeon_enable_vblank_kms(struct drm_device *dev, int crtc)
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return r;
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}
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/**
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* radeon_disable_vblank_kms - disable vblank interrupt
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*
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* @dev: drm dev pointer
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* @crtc: crtc to disable vblank interrupt for
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*
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* Disable the interrupt on the requested crtc (all asics).
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*/
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void radeon_disable_vblank_kms(struct drm_device *dev, int crtc)
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{
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struct radeon_device *rdev = dev->dev_private;
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@ -413,6 +526,19 @@ void radeon_disable_vblank_kms(struct drm_device *dev, int crtc)
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spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
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}
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/**
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* radeon_get_vblank_timestamp_kms - get vblank timestamp
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*
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* @dev: drm dev pointer
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* @crtc: crtc to get the timestamp for
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* @max_error: max error
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* @vblank_time: time value
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* @flags: flags passed to the driver
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*
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* Gets the timestamp on the requested crtc based on the
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* scanout position. (all asics).
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* Returns postive status flags on success, negative error on failure.
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*/
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int radeon_get_vblank_timestamp_kms(struct drm_device *dev, int crtc,
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int *max_error,
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struct timeval *vblank_time,
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