Release 4.11 drivers/gpu/drm/msm/edp/edp_connector.c
/*
* Copyright (c) 2014-2015, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include "drm/drm_edid.h"
#include "msm_kms.h"
#include "edp.h"
struct edp_connector {
struct drm_connector base;
struct msm_edp *edp;
};
#define to_edp_connector(x) container_of(x, struct edp_connector, base)
static enum drm_connector_status edp_connector_detect(
struct drm_connector *connector, bool force)
{
struct edp_connector *edp_connector = to_edp_connector(connector);
struct msm_edp *edp = edp_connector->edp;
DBG("");
return msm_edp_ctrl_panel_connected(edp->ctrl) ?
connector_status_connected : connector_status_disconnected;
}
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static void edp_connector_destroy(struct drm_connector *connector)
{
struct edp_connector *edp_connector = to_edp_connector(connector);
DBG("");
drm_connector_cleanup(connector);
kfree(edp_connector);
}
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static int edp_connector_get_modes(struct drm_connector *connector)
{
struct edp_connector *edp_connector = to_edp_connector(connector);
struct msm_edp *edp = edp_connector->edp;
struct edid *drm_edid = NULL;
int ret = 0;
DBG("");
ret = msm_edp_ctrl_get_panel_info(edp->ctrl, connector, &drm_edid);
if (ret)
return ret;
drm_mode_connector_update_edid_property(connector, drm_edid);
if (drm_edid)
ret = drm_add_edid_modes(connector, drm_edid);
return ret;
}
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static int edp_connector_mode_valid(struct drm_connector *connector,
struct drm_display_mode *mode)
{
struct edp_connector *edp_connector = to_edp_connector(connector);
struct msm_edp *edp = edp_connector->edp;
struct msm_drm_private *priv = connector->dev->dev_private;
struct msm_kms *kms = priv->kms;
long actual, requested;
requested = 1000 * mode->clock;
actual = kms->funcs->round_pixclk(kms,
requested, edp_connector->edp->encoder);
DBG("requested=%ld, actual=%ld", requested, actual);
if (actual != requested)
return MODE_CLOCK_RANGE;
if (!msm_edp_ctrl_pixel_clock_valid(
edp->ctrl, mode->clock, NULL, NULL))
return MODE_CLOCK_RANGE;
/* Invalidate all modes if color format is not supported */
if (connector->display_info.bpc > 8)
return MODE_BAD;
return MODE_OK;
}
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static const struct drm_connector_funcs edp_connector_funcs = {
.dpms = drm_atomic_helper_connector_dpms,
.detect = edp_connector_detect,
.fill_modes = drm_helper_probe_single_connector_modes,
.destroy = edp_connector_destroy,
.reset = drm_atomic_helper_connector_reset,
.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
};
static const struct drm_connector_helper_funcs edp_connector_helper_funcs = {
.get_modes = edp_connector_get_modes,
.mode_valid = edp_connector_mode_valid,
};
/* initialize connector */
struct drm_connector *msm_edp_connector_init(struct msm_edp *edp)
{
struct drm_connector *connector = NULL;
struct edp_connector *edp_connector;
int ret;
edp_connector = kzalloc(sizeof(*edp_connector), GFP_KERNEL);
if (!edp_connector)
return ERR_PTR(-ENOMEM);
edp_connector->edp = edp;
connector = &edp_connector->base;
ret = drm_connector_init(edp->dev, connector, &edp_connector_funcs,
DRM_MODE_CONNECTOR_eDP);
if (ret)
return ERR_PTR(ret);
drm_connector_helper_add(connector, &edp_connector_helper_funcs);
/* We don't support HPD, so only poll status until connected. */
connector->polled = DRM_CONNECTOR_POLL_CONNECT;
/* Display driver doesn't support interlace now. */
connector->interlace_allowed = false;
connector->doublescan_allowed = false;
drm_mode_connector_attach_encoder(connector, edp->encoder);
return connector;
}
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