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/*
*
* (C) COPYRIGHT 2012-2013 ARM Limited. All rights reserved.
*
* This program is free software and is provided to you under the terms of the
* GNU General Public License version 2 as published by the Free Software
* Foundation, and any use by you of this program is subject to the terms
* of such GNU licence.
*
* A copy of the licence is included with the program, and can also be obtained
* from Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
/**
* pl111_drm_connector.c
* Implementation of the connector functions for PL111 DRM
*/
#include <linux/amba/bus.h>
#include <linux/amba/clcd.h>
#include <linux/version.h>
#include <linux/shmem_fs.h>
#include <linux/dma-buf.h>
#include <linux/module.h>
#include <drm/drmP.h>
#include <drm/drm_crtc_helper.h>
#include "pl111_drm.h"
static struct {
int w, h, type;
} pl111_drm_modes[] = {
{ 640, 480, DRM_MODE_TYPE_PREFERRED},
{ 800, 600, 0},
{1024, 768, 0},
{ -1, -1, -1}
};
void pl111_connector_destroy(struct drm_connector *connector)
{
struct pl111_drm_connector *pl111_connector =
PL111_CONNECTOR_FROM_CONNECTOR(connector);
DRM_DEBUG_KMS("DRM %s on connector=%p\n", __func__, connector);
drm_sysfs_connector_remove(connector);
drm_connector_cleanup(connector);
kfree(pl111_connector);
}
enum drm_connector_status pl111_connector_detect(struct drm_connector
*connector, bool force)
{
DRM_DEBUG_KMS("DRM %s on connector=%p\n", __func__, connector);
return connector_status_connected;
}
void pl111_connector_dpms(struct drm_connector *connector, int mode)
{
DRM_DEBUG_KMS("DRM %s on connector=%p\n", __func__, connector);
}
struct drm_encoder *
pl111_connector_helper_best_encoder(struct drm_connector *connector)
{
DRM_DEBUG_KMS("DRM %s on connector=%p\n", __func__, connector);
if (connector->encoder != NULL) {
return connector->encoder; /* Return attached encoder */
} else {
/*
* If there is no attached encoder we choose the best candidate
* from the list.
* For PL111 there is only one encoder so we return the first
* one we find.
* Other h/w would require a suitable criterion below.
*/
struct drm_encoder *encoder = NULL;
struct drm_device *dev = connector->dev;
list_for_each_entry(encoder, &dev->mode_config.encoder_list,
head) {
if (1) { /* criterion ? */
break;
}
}
return encoder; /* return best candidate encoder */
}
}
int pl111_connector_helper_get_modes(struct drm_connector *connector)
{
int i = 0;
int count = 0;
DRM_DEBUG_KMS("DRM %s on connector=%p\n", __func__, connector);
while (pl111_drm_modes[i].w != -1) {
struct drm_display_mode *mode =
drm_mode_find_dmt(connector->dev,
pl111_drm_modes[i].w,
pl111_drm_modes[i].h,
60
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 5, 0))
, false
#endif
);
if (mode != NULL) {
mode->type |= pl111_drm_modes[i].type;
drm_mode_probed_add(connector, mode);
count++;
}
i++;
}
DRM_DEBUG_KMS("found %d modes\n", count);
return count;
}
int pl111_connector_helper_mode_valid(struct drm_connector *connector,
struct drm_display_mode *mode)
{
DRM_DEBUG_KMS("DRM %s on connector=%p\n", __func__, connector);
return MODE_OK;
}
const struct drm_connector_funcs connector_funcs = {
.fill_modes = drm_helper_probe_single_connector_modes,
.destroy = pl111_connector_destroy,
.detect = pl111_connector_detect,
.dpms = pl111_connector_dpms,
};
const struct drm_connector_helper_funcs connector_helper_funcs = {
.get_modes = pl111_connector_helper_get_modes,
.mode_valid = pl111_connector_helper_mode_valid,
.best_encoder = pl111_connector_helper_best_encoder,
};
struct pl111_drm_connector *pl111_connector_create(struct drm_device *dev)
{
struct pl111_drm_connector *pl111_connector;
pl111_connector = kzalloc(sizeof(struct pl111_drm_connector),
GFP_KERNEL);
if (pl111_connector == NULL) {
pr_err("Failed to allocated pl111_drm_connector\n");
return NULL;
}
drm_connector_init(dev, &pl111_connector->connector, &connector_funcs,
DRM_MODE_CONNECTOR_DVII);
drm_connector_helper_add(&pl111_connector->connector,
&connector_helper_funcs);
drm_sysfs_connector_add(&pl111_connector->connector);
return pl111_connector;
}
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