diff options
Diffstat (limited to 'drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_vdac.c')
| -rw-r--r-- | drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_vdac.c | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_vdac.c b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_vdac.c new file mode 100644 index 0000000..12a1855 --- /dev/null +++ b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_vdac.c @@ -0,0 +1,140 @@ +/* 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); +} + +static int hibmc_connector_mode_valid(struct drm_connector *connector, + struct drm_display_mode *mode) +{ + return MODE_OK; +} + +static struct drm_encoder * +hibmc_connector_best_encoder(struct drm_connector *connector) +{ + return drm_encoder_find(connector->dev, connector->encoder_ids[0]); +} + +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; +} + +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); +} + +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; +} |
