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// SPDX-License-Identifier: GPL-2.0-or-later
/* Hisilicon Hibmc SoC drm driver
*
* Based on the bochs drm driver.
*
* Copyright (c) 2016 Huawei Limited.
*
* Author:
* Rongrong Zou <zourongrong@huawei.com>
* Rongrong Zou <zourongrong@gmail.com>
* Jianhua Li <lijianhua@huawei.com>
*/
#include <drm/drm_atomic_helper.h>
#include <drm/drm_probe_helper.h>
#include <drm/drm_print.h>
#include "hibmc_drm_drv.h"
#include "hibmc_drm_regs.h"
static int hibmc_connector_get_modes(struct drm_connector *connector)
{
int count;
void *edid;
struct hibmc_connector *hibmc_connector = to_hibmc_connector(connector);
edid = drm_get_edid(connector, &hibmc_connector->adapter);
if (edid) {
drm_connector_update_edid_property(connector, edid);
count = drm_add_edid_modes(connector, edid);
if (count)
goto out;
}
count = drm_add_modes_noedid(connector,
connector->dev->mode_config.max_width,
connector->dev->mode_config.max_height);
drm_set_preferred_mode(connector, 1024, 768);
out:
kfree(edid);
return count;
}
static enum drm_mode_status hibmc_connector_mode_valid(struct drm_connector *connector,
struct drm_display_mode *mode)
{
return MODE_OK;
}
static void hibmc_connector_destroy(struct drm_connector *connector)
{
struct hibmc_connector *hibmc_connector = to_hibmc_connector(connector);
i2c_del_adapter(&hibmc_connector->adapter);
drm_connector_cleanup(connector);
}
static const struct drm_connector_helper_funcs
hibmc_connector_helper_funcs = {
.get_modes = hibmc_connector_get_modes,
.mode_valid = hibmc_connector_mode_valid,
};
static const struct drm_connector_funcs hibmc_connector_funcs = {
.fill_modes = drm_helper_probe_single_connector_modes,
.destroy = hibmc_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 void hibmc_encoder_mode_set(struct drm_encoder *encoder,
struct drm_display_mode *mode,
struct drm_display_mode *adj_mode)
{
u32 reg;
struct drm_device *dev = encoder->dev;
struct hibmc_drm_private *priv = to_hibmc_drm_private(dev);
reg = readl(priv->mmio + HIBMC_DISPLAY_CONTROL_HISILE);
reg |= HIBMC_DISPLAY_CONTROL_FPVDDEN(1);
reg |= HIBMC_DISPLAY_CONTROL_PANELDATE(1);
reg |= HIBMC_DISPLAY_CONTROL_FPEN(1);
reg |= HIBMC_DISPLAY_CONTROL_VBIASEN(1);
writel(reg, priv->mmio + HIBMC_DISPLAY_CONTROL_HISILE);
}
static const struct drm_encoder_helper_funcs hibmc_encoder_helper_funcs = {
.mode_set = hibmc_encoder_mode_set,
};
static const struct drm_encoder_funcs hibmc_encoder_funcs = {
.destroy = drm_encoder_cleanup,
};
int hibmc_vdac_init(struct hibmc_drm_private *priv)
{
struct drm_device *dev = &priv->dev;
struct hibmc_connector *hibmc_connector = &priv->connector;
struct drm_encoder *encoder = &priv->encoder;
struct drm_connector *connector = &hibmc_connector->base;
int ret;
ret = hibmc_ddc_create(dev, hibmc_connector);
if (ret) {
drm_err(dev, "failed to create ddc: %d\n", ret);
return ret;
}
encoder->possible_crtcs = 0x1;
ret = drm_encoder_init(dev, encoder, &hibmc_encoder_funcs,
DRM_MODE_ENCODER_DAC, NULL);
if (ret) {
drm_err(dev, "failed to init encoder: %d\n", ret);
return ret;
}
drm_encoder_helper_add(encoder, &hibmc_encoder_helper_funcs);
ret = drm_connector_init_with_ddc(dev, connector,
&hibmc_connector_funcs,
DRM_MODE_CONNECTOR_VGA,
&hibmc_connector->adapter);
if (ret) {
drm_err(dev, "failed to init connector: %d\n", ret);
return ret;
}
drm_connector_helper_add(connector, &hibmc_connector_helper_funcs);
drm_connector_attach_encoder(connector, encoder);
return 0;
}
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