/*
* Copyright (c) 2006-2007 Intel Corporation
* Copyright (c) 2007 Dave Airlie <airlied@linux.ie>
*
* DRM core CRTC related functions
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that copyright
* notice and this permission notice appear in supporting documentation, and
* that the name of the copyright holders not be used in advertising or
* publicity pertaining to distribution of the software without specific,
* written prior permission. The copyright holders make no representations
* about the suitability of this software for any purpose. It is provided "as
* is" without express or implied warranty.
*
* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
* OF THIS SOFTWARE.
*
* Authors:
* Keith Packard
* Eric Anholt <eric@anholt.net>
* Dave Airlie <airlied@linux.ie>
* Jesse Barnes <jesse.barnes@intel.com>
*/
#include <linux/list.h>
#include "drm.h"
#include "drmP.h"
#include "drm_crtc.h"
struct drm_prop_enum_list {
int type;
char *name;
};
/*
* Global properties
*/
static struct drm_prop_enum_list drm_dpms_enum_list[] =
{ { DPMSModeOn, "On" },
{ DPMSModeStandby, "Standby" },
{ DPMSModeSuspend, "Suspend" },
{ DPMSModeOff, "Off" }
};
static struct drm_prop_enum_list drm_conn_enum_list[] =
{ { ConnectorUnknown, "Unknown" },
{ ConnectorVGA, "VGA" },
{ ConnectorDVII, "DVI-I" },
{ ConnectorDVID, "DVI-D" },
{ ConnectorDVIA, "DVI-A" },
{ ConnectorComposite, "Composite" },
{ ConnectorSVIDEO, "SVIDEO" },
{ ConnectorLVDS, "LVDS" },
{ ConnectorComponent, "Component" },
{ Connector9PinDIN, "9-pin DIN" },
{ ConnectorDisplayPort, "DisplayPort" },
{ ConnectorHDMIA, "HDMI Type A" },
{ ConnectorHDMIB, "HDMI Type B" },
};
static struct drm_prop_enum_list drm_output_enum_list[] =
{ { DRM_MODE_OUTPUT_NONE, "None" },
{ DRM_MODE_OUTPUT_DAC, "DAC" },
{ DRM_MODE_OUTPUT_TMDS, "TMDS" },
{ DRM_MODE_OUTPUT_LVDS, "LVDS" },
{ DRM_MODE_OUTPUT_TVDAC, "TV" },
};
char *drm_get_output_name(struct drm_output *output)
{
static char buf[32];
snprintf(buf, 32, "%s-%d", drm_output_enum_list[output->output_type].name,
output->output_type_id);
return buf;
}
/**
* drm_idr_get - allocate a new identifier
* @dev: DRM device
* @ptr: object pointer, used to generate unique ID
*
* LOCKING:
* Caller must hold DRM mode_config lock.
*
* Create a unique identifier based on @ptr in @dev's identifier space. Used
* for tracking modes, CRTCs and outputs.
*
* RETURNS:
* New unique (relative to other objects in @dev) integer identifier for the
* object.
*/
int drm_idr_get(struct drm_device *dev, void *ptr)
{
int new_id = 0;
int ret;
again:
if (idr_pre_get(&dev->mode_config.crtc_idr, GFP_KERNEL) == 0) {
DRM_ERROR("Ran out memory getting a mode number\n");
return 0;
}
ret = idr_get_new_above(&dev->mode_config.crtc_idr, ptr, 1, &new_id);
if (ret == -EAGAIN)
goto again;
return new_id;
}
/**
* drm_idr_put - free an identifer
* @dev: DRM device
* @id: ID to free
*
* LOCKING:
* Caller must hold DRM mode_config lock.
*
* Free @id from @dev's unique identifier pool.
*/
void drm_idr_put(struct drm_device *dev, int id)
{
idr_remove(&dev->mode_config.crtc_idr, id);
}
/**
* drm_crtc_from_fb - find the CRTC structure associated with an fb
* @dev: DRM device
* @fb: framebuffer in question
*
* LOCKING:
* Caller must hold mode_config lock.
*
* Find CRTC in the mode_config structure that matches @fb.
*
* RETURNS:
* Pointer to the CRTC or NULL if it wasn't found.
*/
struct drm_crtc *drm_crtc_from_fb(struct drm_device *dev,
struct drm_framebuffer *fb)
{
struct drm_crtc *crtc;
list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
if (crtc->fb == fb)
return crtc;
}
return NULL;
}
/**
* drm_framebuffer_create - create a new framebuffer object
* @dev: DRM device
*
* LOCKING:
* Caller must hold mode config lock.
*
* Creates a new framebuffer objects and adds it to @dev's DRM mode_config.
*
* RETURNS:
* Pointer to new framebuffer or NULL on error.
*/
struct drm_framebuffer *drm_framebuffer_create(struct drm_device *dev)
{
struct drm_framebuffer *fb;
fb = kzalloc(sizeof(struct drm_framebuffer), GFP_KERNEL);
if (!fb)
return NULL;
fb->id = drm_idr_get(dev, fb);
fb->dev = dev;
dev->mode_config.num_fb++;
list_add(&fb->head, &dev->mode_config.fb_list);
return fb;
}
EXPORT_SYMBOL(drm_framebuffer_create);
/**
* drm_framebuffer_destroy - remove a framebuffer object
* @fb: framebuffer to remove
*
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