From: Alex Deucher <alexander.deuc...@amd.com>
Adds documentation to most of the functions in
radeon_kms.c
Signed-off-by: Alex Deucher <alexander.deuc...@amd.com>
---
drivers/gpu/drm/radeon/radeon_kms.c | 126 +++++++++++++++++++++++++++++++++++
1 files changed, 126 insertions(+), 0 deletions(-)
diff --git a/drivers/gpu/drm/radeon/radeon_kms.c
b/drivers/gpu/drm/radeon/radeon_kms.c
index 18b81d6..1d73f16 100644
--- a/drivers/gpu/drm/radeon/radeon_kms.c
+++ b/drivers/gpu/drm/radeon/radeon_kms.c
@@ -33,6 +33,17 @@
#include <linux/vga_switcheroo.h>
#include <linux/slab.h>
+/**
+ * radeon_driver_unload_kms - Main unload function for KMS.
+ *
+ * @dev: drm dev pointer
+ *
+ * This is the main unload function for KMS (all asics).
+ * It calls radeon_modeset_fini() to tear down the
+ * displays, and radeon_device_fini() to tear down
+ * the rest of the device (CP, writeback, etc.).
+ * Returns 0 on success.
+ */
int radeon_driver_unload_kms(struct drm_device *dev)
{
struct radeon_device *rdev = dev->dev_private;
@@ -46,6 +57,19 @@ int radeon_driver_unload_kms(struct drm_device *dev)
return 0;
}
+/**
+ * radeon_driver_load_kms - Main load function for KMS.
+ *
+ * @dev: drm dev pointer
+ * @flags: device flags
+ *
+ * This is the main load function for KMS (all asics).
+ * It calls radeon_device_init() to set up the non-display
+ * parts of the chip (asic init, CP, writeback, etc.), and
+ * radeon_modeset_init() to set up the display parts
+ * (crtcs, encoders, hotplug detect, etc.).
+ * Returns 0 on success, error on failure.
+ */
int radeon_driver_load_kms(struct drm_device *dev, unsigned long flags)
{
struct radeon_device *rdev;
@@ -96,6 +120,16 @@ out:
return r;
}
+/**
+ * radeon_set_filp_rights - Set filp right.
+ *
+ * @dev: drm dev pointer
+ * @owner: drm file
+ * @applier: drm file
+ * @value: value
+ *
+ * Sets the filp rights for the device (all asics).
+ */
static void radeon_set_filp_rights(struct drm_device *dev,
struct drm_file **owner,
struct drm_file *applier,
@@ -118,6 +152,18 @@ static void radeon_set_filp_rights(struct drm_device *dev,
/*
* Userspace get information ioctl
*/
+/**
+ * radeon_info_ioctl - answer a device specific request.
+ *
+ * @rdev: radeon device pointer
+ * @data: request object
+ * @filp: drm filp
+ *
+ * This function is used to pass device specific parameters to the userspace
+ * drivers. Examples include: pci device id, pipeline parms, tiling params,
+ * etc. (all asics).
+ * Returns 0 on success, -EINVAL on failure.
+ */
int radeon_info_ioctl(struct drm_device *dev, void *data, struct drm_file
*filp)
{
struct radeon_device *rdev = dev->dev_private;
@@ -301,16 +347,40 @@ int radeon_info_ioctl(struct drm_device *dev, void *data,
struct drm_file *filp)
/*
* Outdated mess for old drm with Xorg being in charge (void function now).
*/
+/**
+ * radeon_driver_firstopen_kms - drm callback for first open
+ *
+ * @dev: drm dev pointer
+ *
+ * Nothing to be done for KMS (all asics).
+ * Returns 0 on success.
+ */
int radeon_driver_firstopen_kms(struct drm_device *dev)
{
return 0;
}
+/**
+ * radeon_driver_firstopen_kms - drm callback for last close
+ *
+ * @dev: drm dev pointer
+ *
+ * Switch vga switcheroo state after last close (all asics).
+ */
void radeon_driver_lastclose_kms(struct drm_device *dev)
{
vga_switcheroo_process_delayed_switch();
}
+/**
+ * radeon_driver_open_kms - drm callback for open
+ *
+ * @dev: drm dev pointer
+ * @file_priv: drm file
+ *
+ * On device open, init vm on cayman+ (all asics).
+ * Returns 0 on success, error on failure.
+ */
int radeon_driver_open_kms(struct drm_device *dev, struct drm_file *file_priv)
{
struct radeon_device *rdev = dev->dev_private;
@@ -339,6 +409,14 @@ int radeon_driver_open_kms(struct drm_device *dev, struct
drm_file *file_priv)
return 0;
}
+/**
+ * radeon_driver_postclose_kms - drm callback for post close
+ *
+ * @dev: drm dev pointer
+ * @file_priv: drm file
+ *
+ * On device post close, tear down vm on cayman+ (all asics).
+ */
void radeon_driver_postclose_kms(struct drm_device *dev,
struct drm_file *file_priv)
{
@@ -354,6 +432,15 @@ void radeon_driver_postclose_kms(struct drm_device *dev,
}
}
+/**
+ * radeon_driver_preclose_kms - drm callback for pre close
+ *
+ * @dev: drm dev pointer
+ * @file_priv: drm file
+ *
+ * On device pre close, tear down hyperz and cmask filps on r1xx-r5xx
+ * (all asics).
+ */
void radeon_driver_preclose_kms(struct drm_device *dev,
struct drm_file *file_priv)
{
@@ -367,6 +454,15 @@ void radeon_driver_preclose_kms(struct drm_device *dev,
/*
* VBlank related functions.
*/
+/**
+ * radeon_get_vblank_counter_kms - get frame count
+ *
+ * @dev: drm dev pointer
+ * @crtc: crtc to get the frame count from
+ *
+ * Gets the frame count on the requested crtc (all asics).
+ * Returns frame count on success, -EINVAL on failure.
+ */
u32 radeon_get_vblank_counter_kms(struct drm_device *dev, int crtc)
{
struct radeon_device *rdev = dev->dev_private;
@@ -379,6 +475,15 @@ u32 radeon_get_vblank_counter_kms(struct drm_device *dev,
int crtc)
return radeon_get_vblank_counter(rdev, crtc);
}
+/**
+ * radeon_enable_vblank_kms - enable vblank interrupt
+ *
+ * @dev: drm dev pointer
+ * @crtc: crtc to enable vblank interrupt for
+ *
+ * Enable the interrupt on the requested crtc (all asics).
+ * Returns 0 on success, -EINVAL on failure.
+ */
int radeon_enable_vblank_kms(struct drm_device *dev, int crtc)
{
struct radeon_device *rdev = dev->dev_private;
@@ -397,6 +502,14 @@ int radeon_enable_vblank_kms(struct drm_device *dev, int
crtc)
return r;
}
+/**
+ * radeon_disable_vblank_kms - disable vblank interrupt
+ *
+ * @dev: drm dev pointer
+ * @crtc: crtc to disable vblank interrupt for
+ *
+ * Disable the interrupt on the requested crtc (all asics).
+ */
void radeon_disable_vblank_kms(struct drm_device *dev, int crtc)
{
struct radeon_device *rdev = dev->dev_private;
@@ -413,6 +526,19 @@ void radeon_disable_vblank_kms(struct drm_device *dev, int
crtc)
spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
}
+/**
+ * radeon_get_vblank_timestamp_kms - get vblank timestamp
+ *
+ * @dev: drm dev pointer
+ * @crtc: crtc to get the timestamp for
+ * @max_error: max error
+ * @vblank_time: time value
+ * @flags: flags passed to the driver
+ *
+ * Gets the timestamp on the requested crtc based on the
+ * scanout position. (all asics).
+ * Returns postive status flags on success, negative error on failure.
+ */
int radeon_get_vblank_timestamp_kms(struct drm_device *dev, int crtc,
int *max_error,
struct timeval *vblank_time,
--
1.7.7.5
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