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Release 4.11 drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_vdac.c

/* 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>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 */

#include <drm/drm_atomic_helper.h>
#include <drm/drm_crtc_helper.h>

#include "hibmc_drm_drv.h"
#include "hibmc_drm_regs.h"


static int hibmc_connector_get_modes(struct drm_connector *connector) { return drm_add_modes_noedid(connector, 800, 600); }

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static int hibmc_connector_mode_valid(struct drm_connector *connector, struct drm_display_mode *mode) { return MODE_OK; }

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static struct drm_encoder * hibmc_connector_best_encoder(struct drm_connector *connector) { return drm_encoder_find(connector->dev, connector->encoder_ids[0]); }

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static const struct drm_connector_helper_funcs hibmc_connector_helper_funcs = { .get_modes = hibmc_connector_get_modes, .mode_valid = hibmc_connector_mode_valid, .best_encoder = hibmc_connector_best_encoder, }; static const struct drm_connector_funcs hibmc_connector_funcs = { .dpms = drm_atomic_helper_connector_dpms, .fill_modes = drm_helper_probe_single_connector_modes, .destroy = drm_connector_cleanup, .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 struct drm_connector * hibmc_connector_init(struct hibmc_drm_private *priv) { struct drm_device *dev = priv->dev; struct drm_connector *connector; int ret; connector = devm_kzalloc(dev->dev, sizeof(*connector), GFP_KERNEL); if (!connector) { DRM_ERROR("failed to alloc memory when init connector\n"); return ERR_PTR(-ENOMEM); } ret = drm_connector_init(dev, connector, &hibmc_connector_funcs, DRM_MODE_CONNECTOR_VGA); if (ret) { DRM_ERROR("failed to init connector: %d\n", ret); return ERR_PTR(ret); } drm_connector_helper_add(connector, &hibmc_connector_helper_funcs); return connector; }

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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 = dev->dev_private; 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); }

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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 drm_encoder *encoder; struct drm_connector *connector; int ret; connector = hibmc_connector_init(priv); if (IS_ERR(connector)) { DRM_ERROR("failed to create connector: %ld\n", PTR_ERR(connector)); return PTR_ERR(connector); } encoder = devm_kzalloc(dev->dev, sizeof(*encoder), GFP_KERNEL); if (!encoder) { DRM_ERROR("failed to alloc memory when init encoder\n"); return -ENOMEM; } encoder->possible_crtcs = 0x1; ret = drm_encoder_init(dev, encoder, &hibmc_encoder_funcs, DRM_MODE_ENCODER_DAC, NULL); if (ret) { DRM_ERROR("failed to init encoder: %d\n", ret); return ret; } drm_encoder_helper_add(encoder, &hibmc_encoder_helper_funcs); drm_mode_connector_attach_encoder(connector, encoder); return 0; }

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