- 根目录:
- drivers
- gpu
- drm
- exynos
- exynos_drm_connector.c
/*
* Copyright (c) 2011 Samsung Electronics Co., Ltd.
* Authors:
* Inki Dae <inki.dae@samsung.com>
* Joonyoung Shim <jy0922.shim@samsung.com>
* Seung-Woo Kim <sw0312.kim@samsung.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*/
#include "drmP.h"
#include "drm_crtc_helper.h"
#include <drm/exynos_drm.h>
#include "exynos_drm_drv.h"
#include "exynos_drm_encoder.h"
#define MAX_EDID 256
#define to_exynos_connector(x) container_of(x, struct exynos_drm_connector,\
drm_connector)
struct exynos_drm_connector {
struct drm_connector drm_connector;
uint32_t encoder_id;
struct exynos_drm_manager *manager;
};
/* convert exynos_video_timings to drm_display_mode */
static inline void
convert_to_display_mode(struct drm_display_mode *mode,
struct exynos_drm_panel_info *panel)
{
struct fb_videomode *timing = &panel->timing;
DRM_DEBUG_KMS("%s\n", __FILE__);
mode->clock = timing->pixclock / 1000;
mode->vrefresh = timing->refresh;
mode->hdisplay = timing->xres;
mode->hsync_start = mode->hdisplay + timing->left_margin;
mode->hsync_end = mode->hsync_start + timing->hsync_len;
mode->htotal = mode->hsync_end + timing->right_margin;
mode->vdisplay = timing->yres;
mode->vsync_start = mode->vdisplay + timing->upper_margin;
mode->vsync_end = mode->vsync_start + timing->vsync_len;
mode->vtotal = mode->vsync_end + timing->lower_margin;
mode->width_mm = panel->width_mm;
mode->height_mm = panel->height_mm;
if (timing->vmode & FB_VMODE_INTERLACED)
mode->flags |= DRM_MODE_FLAG_INTERLACE;
if (timing->vmode & FB_VMODE_DOUBLE)
mode->flags |= DRM_MODE_FLAG_DBLSCAN;
}
/* convert drm_display_mode to exynos_video_timings */
static inline void
convert_to_video_timing(struct fb_videomode *timing,
struct drm_display_mode *mode)
{
DRM_DEBUG_KMS("%s\n", __FILE__);
memset(timing, 0, sizeof(*timing));
timing->pixclock = mode->clock * 1000;
timing->refresh = drm_mode_vrefresh(mode);
timing->xres = mode->hdisplay;
timing->left_margin = mode->hsync_start - mode->hdisplay;
timing->hsync_len = mode->hsync_end - mode->hsync_start;
timing->right_margin = mode->htotal - mode->hsync_end;
timing->yres = mode->vdisplay;
timing->upper_margin = mode->vsync_start - mode->vdisplay;
timing->vsync_len = mode->vsync_end - mode->vsync_start;
timing->lower_margin = mode->vtotal - mode->vsync_end;
if (mode->flags & DRM_MODE_FLAG_INTERLACE)
timing->vmode = FB_VMODE_INTERLACED;
else
timing->vmode = FB_VMODE_NONINTERLACED;
if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
timing->vmode |= FB_VMODE_DOUBLE;
}
static int exynos_drm_connector_get_modes(struct drm_connector *connector)
{
struct exynos_drm_connector *exynos_connector =
to_exynos_connector(connector);
struct exynos_drm_manager *manager = exynos_connector->manager;
struct exynos_drm_display_ops *display_ops = manager->display_ops;
unsigned int count;
DRM_DEBUG_KMS("%s\n", __FILE__);
if (!display_ops) {
DRM_DEBUG_KMS("display_ops is null.\n");
return 0;
}
/*
* if get_edid() exists then get_edid() callback of hdmi side
* is called to get edid data through i2c interface else
* get timing from the FIMD driver(display controller).
*
* P.S. in case of lcd panel, count is always 1 if success
* because lcd panel has only one mode.
*/
if (display_ops->get_edid) {
int ret;
void *edid;
edid = kzalloc(MAX_EDID, GFP_KERNEL);
if (!edid) {
DRM_ERROR("failed to allocate edid\n");
return 0;
}
ret = display_ops->get_edid(manager->dev, connector,
edid, MAX_EDID);
if (ret < 0) {
DRM_ERROR("failed to get edid data.\n");
kfree(edid);
edid = NULL;
return 0;
}
drm_mode_connector_update_edid_property(connector, edid);
count = drm_add_edid_modes(connector, edid);
kfree(connector->display_info.raw_edid);
connector->display_info.raw_edid = edid;
} else {
struct drm_display_mode *mode = drm_mode_create(connector->dev);
struct exynos_drm_panel_info *panel;
if (display_ops->get_panel)
panel = display_ops->get_panel(manager->dev);
else {
drm_mode_destroy(connector->dev, mode);
return 0;
}
convert_to_display_mode(mode, panel);
connector->display_info.width_mm = mode->width_mm;
connector->display_info.height_mm = mode->height_mm;
mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
drm_mode_set_name(mode);
drm_mode_probed_add(connector, mode);
count = 1;
}
return count;
}
static int exynos_drm_connector_mode_valid(struct drm_connector *connector,
struct drm_display_mode *mode)
{
struct exynos_drm_connector *exynos_connector =
to_exynos_connector(connector);
struct exynos_drm_manager *manager = exynos_connector->manager;
struct exynos_drm_display_ops *display_ops = manager->display_ops;
struct fb_videomode timing;
int ret = MODE_BAD;
DRM_DEBUG_KMS("%s\n", __FILE__);
convert_to_video_timing(&timing, mode);
if (display_ops && display_ops->check_timing)
if (!display_ops->check_timing(manager->dev, (void *)&timing))
ret = MODE_OK;
return ret;
}
struct drm_encoder *exynos_drm_best_encoder(struct drm_connector *connector)
{
struct drm_device *dev = connector->dev;
struct exynos_drm_connector *exynos_connector =
to_exynos_connector(connector);
struct drm_mode_object *obj;
struct drm_encoder *encoder;
DRM_DEBUG_KMS("%s\n", __FILE__);
obj = drm_mode_object_find(dev, exynos_connector->encoder_id,
DRM_MODE_OBJECT_ENCODER);
if (!obj) {
DRM_DEBUG_KMS("Unknown ENCODER ID %d\n",
exynos_connector->encoder_id);
return NULL;
}
encoder = obj_to_encoder(obj);
return encoder;
}
static struct drm_connector_helper_funcs exynos_connector_helper_funcs = {
.get_modes = exynos_drm_connector_get_modes,
.mode_valid = exynos_drm_connector_mode_valid,
.best_encoder = exynos_drm_best_encoder,
};
/* get detection status of display device. */
static enum drm_connector_status
exynos_drm_connector_detect(struct drm_connector *connector, bool force)
{
struct exynos_drm_connector *exynos_connector =
to_exynos_connector(connector);
struct exynos_drm_manager *manager = exynos_connector->manager;
struct exynos_drm_display_ops *display_ops =
manager->display_ops;
enum drm_connector_status status = connector_status_disconnected;
DRM_DEBUG_KMS("%s\n", __FILE__);
if (display_ops && display_ops->is_connected) {
if (display_ops->is_connected(manager->dev))
status = connector_status_connected;
else
status = connector_status_disconnected;
}
return status;
}
static void exynos_drm_connector_destroy(struct drm_connector *connector)
{
struct exynos_drm_connector *exynos_connector =
to_exynos_connector(connector);
DRM_DEBUG_KMS("%s\n", __FILE__);
drm_sysfs_connector_remove(connector);
drm_connector_cleanup(connector);
kfree(exynos_connector);
}
static struct drm_connector_funcs exynos_connector_funcs = {
.dpms = drm_helper_connector_dpms,
.fill_modes = drm_helper_probe_single_connector_modes,
.detect = exynos_drm_connector_detect,
.destroy = exynos_drm_connector_destroy,
};
struct drm_connector *exynos_drm_connector_create(struct drm_device *dev,
struct drm_encoder *encoder)
{
struct exynos_drm_connector *exynos_connector;
struct exynos_drm_manager *manager = exynos_drm_get_manager(encoder);
struct drm_connector *connector;
int type;
int err;
DRM_DEBUG_KMS("%s\n", __FILE__);
exynos_connector = kzalloc(sizeof(*exynos_connector), GFP_KERNEL);
if (!exynos_connector) {
DRM_ERROR("failed to allocate connector\n");
return NULL;
}
connector = &exynos_connector->drm_connector;
switch (manager->display_ops->type) {
case EXYNOS_DISPLAY_TYPE_HDMI:
type = DRM_MODE_CONNECTOR_HDMIA;
connector->interlace_allowed = true;
connector->polled = DRM_CONNECTOR_POLL_HPD;
break;
default:
type = DRM_MODE_CONNECTOR_Unknown;
break;
}
drm_connector_init(dev, connector, &exynos_connector_funcs, type);
drm_connector_helper_add(connector, &exynos_connector_helper_funcs);
err = drm_sysfs_connector_add(connector);
if (err)
goto err_connector;
exynos_connector->encoder_id = encoder->base.id;
exynos_connector->manager = manager;
connector->encoder = encoder;
err = drm_mode_connector_attach_encoder(connector, encoder);
if (err) {
DRM_ERROR("failed to attach a connector to a encoder\n");
goto err_sysfs;
}
DRM_DEBUG_KMS("connector has been created\n");
return connector;
err_sysfs:
drm_sysfs_connector_remove(connector);
err_connector:
drm_connector_cleanup(connector);
kfree(exynos_connector);
return NULL;
}
MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>");
MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
MODULE_AUTHOR("Seung-Woo Kim <sw0312.kim@samsung.com>");
MODULE_DESCRIPTION("Samsung SoC DRM Connector Driver");
MODULE_LICENSE("GPL");