mirror of https://gitee.com/openkylin/linux.git
138 lines
3.6 KiB
C
138 lines
3.6 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/* Hisilicon Hibmc SoC drm driver
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*
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* Based on the bochs drm driver.
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*
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* Copyright (c) 2016 Huawei Limited.
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*
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* Author:
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* Rongrong Zou <zourongrong@huawei.com>
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* Rongrong Zou <zourongrong@gmail.com>
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* Jianhua Li <lijianhua@huawei.com>
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*/
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#include <drm/drm_gem_vram_helper.h>
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#include <drm/drm_atomic_helper.h>
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#include <drm/drm_probe_helper.h>
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#include <drm/drm_crtc_helper.h>
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#include <drm/drm_print.h>
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#include "hibmc_drm_drv.h"
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#include "hibmc_drm_regs.h"
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static int hibmc_connector_get_modes(struct drm_connector *connector)
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{
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int count;
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count = drm_add_modes_noedid(connector,
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connector->dev->mode_config.max_width,
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connector->dev->mode_config.max_height);
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drm_set_preferred_mode(connector, 1024, 768);
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return count;
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}
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static enum drm_mode_status hibmc_connector_mode_valid(struct drm_connector *connector,
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struct drm_display_mode *mode)
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{
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return MODE_OK;
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}
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static const struct drm_connector_helper_funcs
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hibmc_connector_helper_funcs = {
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.get_modes = hibmc_connector_get_modes,
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.mode_valid = hibmc_connector_mode_valid,
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};
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static const struct drm_connector_funcs hibmc_connector_funcs = {
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.fill_modes = drm_helper_probe_single_connector_modes,
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.destroy = drm_connector_cleanup,
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.reset = drm_atomic_helper_connector_reset,
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.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
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.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
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};
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static struct drm_connector *
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hibmc_connector_init(struct hibmc_drm_private *priv)
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{
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struct drm_device *dev = priv->dev;
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struct drm_connector *connector;
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int ret;
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connector = devm_kzalloc(dev->dev, sizeof(*connector), GFP_KERNEL);
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if (!connector) {
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DRM_ERROR("failed to alloc memory when init connector\n");
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return ERR_PTR(-ENOMEM);
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}
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ret = drm_connector_init(dev, connector,
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&hibmc_connector_funcs,
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DRM_MODE_CONNECTOR_VGA);
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if (ret) {
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DRM_ERROR("failed to init connector: %d\n", ret);
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return ERR_PTR(ret);
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}
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drm_connector_helper_add(connector,
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&hibmc_connector_helper_funcs);
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return connector;
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}
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static void hibmc_encoder_mode_set(struct drm_encoder *encoder,
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struct drm_display_mode *mode,
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struct drm_display_mode *adj_mode)
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{
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u32 reg;
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struct drm_device *dev = encoder->dev;
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struct hibmc_drm_private *priv = dev->dev_private;
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reg = readl(priv->mmio + HIBMC_DISPLAY_CONTROL_HISILE);
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reg |= HIBMC_DISPLAY_CONTROL_FPVDDEN(1);
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reg |= HIBMC_DISPLAY_CONTROL_PANELDATE(1);
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reg |= HIBMC_DISPLAY_CONTROL_FPEN(1);
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reg |= HIBMC_DISPLAY_CONTROL_VBIASEN(1);
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writel(reg, priv->mmio + HIBMC_DISPLAY_CONTROL_HISILE);
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}
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static const struct drm_encoder_helper_funcs hibmc_encoder_helper_funcs = {
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.mode_set = hibmc_encoder_mode_set,
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};
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static const struct drm_encoder_funcs hibmc_encoder_funcs = {
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.destroy = drm_encoder_cleanup,
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};
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int hibmc_vdac_init(struct hibmc_drm_private *priv)
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{
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struct drm_device *dev = priv->dev;
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struct drm_encoder *encoder;
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struct drm_connector *connector;
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int ret;
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connector = hibmc_connector_init(priv);
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if (IS_ERR(connector)) {
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DRM_ERROR("failed to create connector: %ld\n",
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PTR_ERR(connector));
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return PTR_ERR(connector);
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}
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encoder = devm_kzalloc(dev->dev, sizeof(*encoder), GFP_KERNEL);
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if (!encoder) {
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DRM_ERROR("failed to alloc memory when init encoder\n");
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return -ENOMEM;
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}
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encoder->possible_crtcs = 0x1;
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ret = drm_encoder_init(dev, encoder, &hibmc_encoder_funcs,
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DRM_MODE_ENCODER_DAC, NULL);
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if (ret) {
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DRM_ERROR("failed to init encoder: %d\n", ret);
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return ret;
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}
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drm_encoder_helper_add(encoder, &hibmc_encoder_helper_funcs);
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drm_connector_attach_encoder(connector, encoder);
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return 0;
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}
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