1 /* Hisilicon Hibmc SoC drm driver
3 * Based on the bochs drm driver.
5 * Copyright (c) 2016 Huawei Limited.
8 * Rongrong Zou <zourongrong@huawei.com>
9 * Rongrong Zou <zourongrong@gmail.com>
10 * Jianhua Li <lijianhua@huawei.com>
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
19 #include <drm/drm_atomic_helper.h>
20 #include <drm/drm_crtc_helper.h>
22 #include "hibmc_drm_drv.h"
23 #include "hibmc_drm_regs.h"
25 static int hibmc_connector_get_modes(struct drm_connector *connector)
27 return drm_add_modes_noedid(connector, 800, 600);
30 static enum drm_mode_status hibmc_connector_mode_valid(struct drm_connector *connector,
31 struct drm_display_mode *mode)
36 static struct drm_encoder *
37 hibmc_connector_best_encoder(struct drm_connector *connector)
39 return drm_encoder_find(connector->dev, NULL, connector->encoder_ids[0]);
42 static const struct drm_connector_helper_funcs
43 hibmc_connector_helper_funcs = {
44 .get_modes = hibmc_connector_get_modes,
45 .mode_valid = hibmc_connector_mode_valid,
46 .best_encoder = hibmc_connector_best_encoder,
49 static const struct drm_connector_funcs hibmc_connector_funcs = {
50 .fill_modes = drm_helper_probe_single_connector_modes,
51 .destroy = drm_connector_cleanup,
52 .reset = drm_atomic_helper_connector_reset,
53 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
54 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
57 static struct drm_connector *
58 hibmc_connector_init(struct hibmc_drm_private *priv)
60 struct drm_device *dev = priv->dev;
61 struct drm_connector *connector;
64 connector = devm_kzalloc(dev->dev, sizeof(*connector), GFP_KERNEL);
66 DRM_ERROR("failed to alloc memory when init connector\n");
67 return ERR_PTR(-ENOMEM);
70 ret = drm_connector_init(dev, connector,
71 &hibmc_connector_funcs,
72 DRM_MODE_CONNECTOR_VGA);
74 DRM_ERROR("failed to init connector: %d\n", ret);
77 drm_connector_helper_add(connector,
78 &hibmc_connector_helper_funcs);
83 static void hibmc_encoder_mode_set(struct drm_encoder *encoder,
84 struct drm_display_mode *mode,
85 struct drm_display_mode *adj_mode)
88 struct drm_device *dev = encoder->dev;
89 struct hibmc_drm_private *priv = dev->dev_private;
91 reg = readl(priv->mmio + HIBMC_DISPLAY_CONTROL_HISILE);
92 reg |= HIBMC_DISPLAY_CONTROL_FPVDDEN(1);
93 reg |= HIBMC_DISPLAY_CONTROL_PANELDATE(1);
94 reg |= HIBMC_DISPLAY_CONTROL_FPEN(1);
95 reg |= HIBMC_DISPLAY_CONTROL_VBIASEN(1);
96 writel(reg, priv->mmio + HIBMC_DISPLAY_CONTROL_HISILE);
99 static const struct drm_encoder_helper_funcs hibmc_encoder_helper_funcs = {
100 .mode_set = hibmc_encoder_mode_set,
103 static const struct drm_encoder_funcs hibmc_encoder_funcs = {
104 .destroy = drm_encoder_cleanup,
107 int hibmc_vdac_init(struct hibmc_drm_private *priv)
109 struct drm_device *dev = priv->dev;
110 struct drm_encoder *encoder;
111 struct drm_connector *connector;
114 connector = hibmc_connector_init(priv);
115 if (IS_ERR(connector)) {
116 DRM_ERROR("failed to create connector: %ld\n",
118 return PTR_ERR(connector);
121 encoder = devm_kzalloc(dev->dev, sizeof(*encoder), GFP_KERNEL);
123 DRM_ERROR("failed to alloc memory when init encoder\n");
127 encoder->possible_crtcs = 0x1;
128 ret = drm_encoder_init(dev, encoder, &hibmc_encoder_funcs,
129 DRM_MODE_ENCODER_DAC, NULL);
131 DRM_ERROR("failed to init encoder: %d\n", ret);
135 drm_encoder_helper_add(encoder, &hibmc_encoder_helper_funcs);
136 drm_mode_connector_attach_encoder(connector, encoder);