| /* exynos_drm_vidi.c |
| * |
| * Copyright (C) 2012 Samsung Electronics Co.Ltd |
| * Authors: |
| * Inki Dae <inki.dae@samsung.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/drmP.h> |
| |
| #include <linux/kernel.h> |
| #include <linux/platform_device.h> |
| |
| #include <drm/exynos_drm.h> |
| |
| #include <drm/drm_edid.h> |
| #include <drm/drm_crtc_helper.h> |
| |
| #include "exynos_drm_drv.h" |
| #include "exynos_drm_crtc.h" |
| #include "exynos_drm_encoder.h" |
| #include "exynos_drm_vidi.h" |
| |
| /* vidi has totally three virtual windows. */ |
| #define WINDOWS_NR 3 |
| |
| #define get_vidi_context(dev) platform_get_drvdata(to_platform_device(dev)) |
| |
| struct vidi_win_data { |
| unsigned int offset_x; |
| unsigned int offset_y; |
| unsigned int ovl_width; |
| unsigned int ovl_height; |
| unsigned int fb_width; |
| unsigned int fb_height; |
| unsigned int bpp; |
| dma_addr_t dma_addr; |
| unsigned int buf_offsize; |
| unsigned int line_size; /* bytes */ |
| bool enabled; |
| }; |
| |
| struct vidi_context { |
| struct exynos_drm_subdrv subdrv; |
| struct drm_crtc *crtc; |
| struct vidi_win_data win_data[WINDOWS_NR]; |
| struct edid *raw_edid; |
| unsigned int clkdiv; |
| unsigned int default_win; |
| unsigned long irq_flags; |
| unsigned int connected; |
| bool vblank_on; |
| bool suspended; |
| bool direct_vblank; |
| struct work_struct work; |
| struct mutex lock; |
| }; |
| |
| static const char fake_edid_info[] = { |
| 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x4c, 0x2d, 0x05, 0x05, |
| 0x00, 0x00, 0x00, 0x00, 0x30, 0x12, 0x01, 0x03, 0x80, 0x10, 0x09, 0x78, |
| 0x0a, 0xee, 0x91, 0xa3, 0x54, 0x4c, 0x99, 0x26, 0x0f, 0x50, 0x54, 0xbd, |
| 0xee, 0x00, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, |
| 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x66, 0x21, 0x50, 0xb0, 0x51, 0x00, |
| 0x1b, 0x30, 0x40, 0x70, 0x36, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, |
| 0x01, 0x1d, 0x00, 0x72, 0x51, 0xd0, 0x1e, 0x20, 0x6e, 0x28, 0x55, 0x00, |
| 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, 0x00, 0x00, 0x00, 0xfd, 0x00, 0x18, |
| 0x4b, 0x1a, 0x44, 0x17, 0x00, 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, |
| 0x00, 0x00, 0x00, 0xfc, 0x00, 0x53, 0x41, 0x4d, 0x53, 0x55, 0x4e, 0x47, |
| 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x01, 0xbc, 0x02, 0x03, 0x1e, 0xf1, |
| 0x46, 0x84, 0x05, 0x03, 0x10, 0x20, 0x22, 0x23, 0x09, 0x07, 0x07, 0x83, |
| 0x01, 0x00, 0x00, 0xe2, 0x00, 0x0f, 0x67, 0x03, 0x0c, 0x00, 0x10, 0x00, |
| 0xb8, 0x2d, 0x01, 0x1d, 0x80, 0x18, 0x71, 0x1c, 0x16, 0x20, 0x58, 0x2c, |
| 0x25, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x9e, 0x8c, 0x0a, 0xd0, 0x8a, |
| 0x20, 0xe0, 0x2d, 0x10, 0x10, 0x3e, 0x96, 0x00, 0xa0, 0x5a, 0x00, 0x00, |
| 0x00, 0x18, 0x02, 0x3a, 0x80, 0x18, 0x71, 0x38, 0x2d, 0x40, 0x58, 0x2c, |
| 0x45, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, 0x00, 0x00, 0x00, 0x00, |
| 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 0x00, 0x00, 0x00, 0x06 |
| }; |
| |
| static bool vidi_display_is_connected(struct device *dev) |
| { |
| struct vidi_context *ctx = get_vidi_context(dev); |
| |
| /* |
| * connection request would come from user side |
| * to do hotplug through specific ioctl. |
| */ |
| return ctx->connected ? true : false; |
| } |
| |
| static struct edid *vidi_get_edid(struct device *dev, |
| struct drm_connector *connector) |
| { |
| struct vidi_context *ctx = get_vidi_context(dev); |
| struct edid *edid; |
| |
| /* |
| * the edid data comes from user side and it would be set |
| * to ctx->raw_edid through specific ioctl. |
| */ |
| if (!ctx->raw_edid) { |
| DRM_DEBUG_KMS("raw_edid is null.\n"); |
| return ERR_PTR(-EFAULT); |
| } |
| |
| edid = drm_edid_duplicate(ctx->raw_edid); |
| if (!edid) { |
| DRM_DEBUG_KMS("failed to allocate edid\n"); |
| return ERR_PTR(-ENOMEM); |
| } |
| |
| return edid; |
| } |
| |
| static void *vidi_get_panel(struct device *dev) |
| { |
| /* TODO. */ |
| |
| return NULL; |
| } |
| |
| static int vidi_check_mode(struct device *dev, struct drm_display_mode *mode) |
| { |
| /* TODO. */ |
| |
| return 0; |
| } |
| |
| static int vidi_display_power_on(struct device *dev, int mode) |
| { |
| /* TODO */ |
| |
| return 0; |
| } |
| |
| static struct exynos_drm_display_ops vidi_display_ops = { |
| .type = EXYNOS_DISPLAY_TYPE_VIDI, |
| .is_connected = vidi_display_is_connected, |
| .get_edid = vidi_get_edid, |
| .get_panel = vidi_get_panel, |
| .check_mode = vidi_check_mode, |
| .power_on = vidi_display_power_on, |
| }; |
| |
| static void vidi_dpms(struct device *subdrv_dev, int mode) |
| { |
| struct vidi_context *ctx = get_vidi_context(subdrv_dev); |
| |
| DRM_DEBUG_KMS("%d\n", mode); |
| |
| mutex_lock(&ctx->lock); |
| |
| switch (mode) { |
| case DRM_MODE_DPMS_ON: |
| /* TODO. */ |
| break; |
| case DRM_MODE_DPMS_STANDBY: |
| case DRM_MODE_DPMS_SUSPEND: |
| case DRM_MODE_DPMS_OFF: |
| /* TODO. */ |
| break; |
| default: |
| DRM_DEBUG_KMS("unspecified mode %d\n", mode); |
| break; |
| } |
| |
| mutex_unlock(&ctx->lock); |
| } |
| |
| static void vidi_apply(struct device *subdrv_dev) |
| { |
| struct vidi_context *ctx = get_vidi_context(subdrv_dev); |
| struct exynos_drm_manager *mgr = ctx->subdrv.manager; |
| struct exynos_drm_manager_ops *mgr_ops = mgr->ops; |
| struct exynos_drm_overlay_ops *ovl_ops = mgr->overlay_ops; |
| struct vidi_win_data *win_data; |
| int i; |
| |
| for (i = 0; i < WINDOWS_NR; i++) { |
| win_data = &ctx->win_data[i]; |
| if (win_data->enabled && (ovl_ops && ovl_ops->commit)) |
| ovl_ops->commit(subdrv_dev, i); |
| } |
| |
| if (mgr_ops && mgr_ops->commit) |
| mgr_ops->commit(subdrv_dev); |
| } |
| |
| static void vidi_commit(struct device *dev) |
| { |
| struct vidi_context *ctx = get_vidi_context(dev); |
| |
| if (ctx->suspended) |
| return; |
| } |
| |
| static int vidi_enable_vblank(struct device *dev) |
| { |
| struct vidi_context *ctx = get_vidi_context(dev); |
| |
| if (ctx->suspended) |
| return -EPERM; |
| |
| if (!test_and_set_bit(0, &ctx->irq_flags)) |
| ctx->vblank_on = true; |
| |
| ctx->direct_vblank = true; |
| |
| /* |
| * in case of page flip request, vidi_finish_pageflip function |
| * will not be called because direct_vblank is true and then |
| * that function will be called by overlay_ops->commit callback |
| */ |
| schedule_work(&ctx->work); |
| |
| return 0; |
| } |
| |
| static void vidi_disable_vblank(struct device *dev) |
| { |
| struct vidi_context *ctx = get_vidi_context(dev); |
| |
| if (ctx->suspended) |
| return; |
| |
| if (test_and_clear_bit(0, &ctx->irq_flags)) |
| ctx->vblank_on = false; |
| } |
| |
| static struct exynos_drm_manager_ops vidi_manager_ops = { |
| .dpms = vidi_dpms, |
| .apply = vidi_apply, |
| .commit = vidi_commit, |
| .enable_vblank = vidi_enable_vblank, |
| .disable_vblank = vidi_disable_vblank, |
| }; |
| |
| static void vidi_win_mode_set(struct device *dev, |
| struct exynos_drm_overlay *overlay) |
| { |
| struct vidi_context *ctx = get_vidi_context(dev); |
| struct vidi_win_data *win_data; |
| int win; |
| unsigned long offset; |
| |
| if (!overlay) { |
| dev_err(dev, "overlay is NULL\n"); |
| return; |
| } |
| |
| win = overlay->zpos; |
| if (win == DEFAULT_ZPOS) |
| win = ctx->default_win; |
| |
| if (win < 0 || win >= WINDOWS_NR) |
| return; |
| |
| offset = overlay->fb_x * (overlay->bpp >> 3); |
| offset += overlay->fb_y * overlay->pitch; |
| |
| DRM_DEBUG_KMS("offset = 0x%lx, pitch = %x\n", offset, overlay->pitch); |
| |
| win_data = &ctx->win_data[win]; |
| |
| win_data->offset_x = overlay->crtc_x; |
| win_data->offset_y = overlay->crtc_y; |
| win_data->ovl_width = overlay->crtc_width; |
| win_data->ovl_height = overlay->crtc_height; |
| win_data->fb_width = overlay->fb_width; |
| win_data->fb_height = overlay->fb_height; |
| win_data->dma_addr = overlay->dma_addr[0] + offset; |
| win_data->bpp = overlay->bpp; |
| win_data->buf_offsize = (overlay->fb_width - overlay->crtc_width) * |
| (overlay->bpp >> 3); |
| win_data->line_size = overlay->crtc_width * (overlay->bpp >> 3); |
| |
| /* |
| * some parts of win_data should be transferred to user side |
| * through specific ioctl. |
| */ |
| |
| DRM_DEBUG_KMS("offset_x = %d, offset_y = %d\n", |
| win_data->offset_x, win_data->offset_y); |
| DRM_DEBUG_KMS("ovl_width = %d, ovl_height = %d\n", |
| win_data->ovl_width, win_data->ovl_height); |
| DRM_DEBUG_KMS("paddr = 0x%lx\n", (unsigned long)win_data->dma_addr); |
| DRM_DEBUG_KMS("fb_width = %d, crtc_width = %d\n", |
| overlay->fb_width, overlay->crtc_width); |
| } |
| |
| static void vidi_win_commit(struct device *dev, int zpos) |
| { |
| struct vidi_context *ctx = get_vidi_context(dev); |
| struct vidi_win_data *win_data; |
| int win = zpos; |
| |
| if (ctx->suspended) |
| return; |
| |
| if (win == DEFAULT_ZPOS) |
| win = ctx->default_win; |
| |
| if (win < 0 || win >= WINDOWS_NR) |
| return; |
| |
| win_data = &ctx->win_data[win]; |
| |
| win_data->enabled = true; |
| |
| DRM_DEBUG_KMS("dma_addr = 0x%x\n", win_data->dma_addr); |
| |
| if (ctx->vblank_on) |
| schedule_work(&ctx->work); |
| } |
| |
| static void vidi_win_disable(struct device *dev, int zpos) |
| { |
| struct vidi_context *ctx = get_vidi_context(dev); |
| struct vidi_win_data *win_data; |
| int win = zpos; |
| |
| if (win == DEFAULT_ZPOS) |
| win = ctx->default_win; |
| |
| if (win < 0 || win >= WINDOWS_NR) |
| return; |
| |
| win_data = &ctx->win_data[win]; |
| win_data->enabled = false; |
| |
| /* TODO. */ |
| } |
| |
| static struct exynos_drm_overlay_ops vidi_overlay_ops = { |
| .mode_set = vidi_win_mode_set, |
| .commit = vidi_win_commit, |
| .disable = vidi_win_disable, |
| }; |
| |
| static struct exynos_drm_manager vidi_manager = { |
| .pipe = -1, |
| .ops = &vidi_manager_ops, |
| .overlay_ops = &vidi_overlay_ops, |
| .display_ops = &vidi_display_ops, |
| }; |
| |
| static void vidi_fake_vblank_handler(struct work_struct *work) |
| { |
| struct vidi_context *ctx = container_of(work, struct vidi_context, |
| work); |
| struct exynos_drm_subdrv *subdrv = &ctx->subdrv; |
| struct exynos_drm_manager *manager = subdrv->manager; |
| |
| if (manager->pipe < 0) |
| return; |
| |
| /* refresh rate is about 50Hz. */ |
| usleep_range(16000, 20000); |
| |
| mutex_lock(&ctx->lock); |
| |
| if (ctx->direct_vblank) { |
| drm_handle_vblank(subdrv->drm_dev, manager->pipe); |
| ctx->direct_vblank = false; |
| mutex_unlock(&ctx->lock); |
| return; |
| } |
| |
| mutex_unlock(&ctx->lock); |
| |
| exynos_drm_crtc_finish_pageflip(subdrv->drm_dev, manager->pipe); |
| } |
| |
| static int vidi_subdrv_probe(struct drm_device *drm_dev, struct device *dev) |
| { |
| /* |
| * enable drm irq mode. |
| * - with irq_enabled = true, we can use the vblank feature. |
| * |
| * P.S. note that we wouldn't use drm irq handler but |
| * just specific driver own one instead because |
| * drm framework supports only one irq handler. |
| */ |
| drm_dev->irq_enabled = true; |
| |
| /* |
| * with vblank_disable_allowed = true, vblank interrupt will be disabled |
| * by drm timer once a current process gives up ownership of |
| * vblank event.(after drm_vblank_put function is called) |
| */ |
| drm_dev->vblank_disable_allowed = true; |
| |
| return 0; |
| } |
| |
| static void vidi_subdrv_remove(struct drm_device *drm_dev, struct device *dev) |
| { |
| /* TODO. */ |
| } |
| |
| static int vidi_power_on(struct vidi_context *ctx, bool enable) |
| { |
| struct exynos_drm_subdrv *subdrv = &ctx->subdrv; |
| struct device *dev = subdrv->dev; |
| |
| if (enable) { |
| ctx->suspended = false; |
| |
| /* if vblank was enabled status, enable it again. */ |
| if (test_and_clear_bit(0, &ctx->irq_flags)) |
| vidi_enable_vblank(dev); |
| |
| vidi_apply(dev); |
| } else { |
| ctx->suspended = true; |
| } |
| |
| return 0; |
| } |
| |
| static int vidi_show_connection(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| int rc; |
| struct vidi_context *ctx = get_vidi_context(dev); |
| |
| mutex_lock(&ctx->lock); |
| |
| rc = sprintf(buf, "%d\n", ctx->connected); |
| |
| mutex_unlock(&ctx->lock); |
| |
| return rc; |
| } |
| |
| static int vidi_store_connection(struct device *dev, |
| struct device_attribute *attr, |
| const char *buf, size_t len) |
| { |
| struct vidi_context *ctx = get_vidi_context(dev); |
| int ret; |
| |
| ret = kstrtoint(buf, 0, &ctx->connected); |
| if (ret) |
| return ret; |
| |
| if (ctx->connected > 1) |
| return -EINVAL; |
| |
| /* use fake edid data for test. */ |
| if (!ctx->raw_edid) |
| ctx->raw_edid = (struct edid *)fake_edid_info; |
| |
| /* if raw_edid isn't same as fake data then it can't be tested. */ |
| if (ctx->raw_edid != (struct edid *)fake_edid_info) { |
| DRM_DEBUG_KMS("edid data is not fake data.\n"); |
| return -EINVAL; |
| } |
| |
| DRM_DEBUG_KMS("requested connection.\n"); |
| |
| drm_helper_hpd_irq_event(ctx->subdrv.drm_dev); |
| |
| return len; |
| } |
| |
| static DEVICE_ATTR(connection, 0644, vidi_show_connection, |
| vidi_store_connection); |
| |
| int vidi_connection_ioctl(struct drm_device *drm_dev, void *data, |
| struct drm_file *file_priv) |
| { |
| struct vidi_context *ctx = NULL; |
| struct drm_encoder *encoder; |
| struct exynos_drm_manager *manager; |
| struct exynos_drm_display_ops *display_ops; |
| struct drm_exynos_vidi_connection *vidi = data; |
| |
| if (!vidi) { |
| DRM_DEBUG_KMS("user data for vidi is null.\n"); |
| return -EINVAL; |
| } |
| |
| if (vidi->connection > 1) { |
| DRM_DEBUG_KMS("connection should be 0 or 1.\n"); |
| return -EINVAL; |
| } |
| |
| list_for_each_entry(encoder, &drm_dev->mode_config.encoder_list, |
| head) { |
| manager = exynos_drm_get_manager(encoder); |
| display_ops = manager->display_ops; |
| |
| if (display_ops->type == EXYNOS_DISPLAY_TYPE_VIDI) { |
| ctx = get_vidi_context(manager->dev); |
| break; |
| } |
| } |
| |
| if (!ctx) { |
| DRM_DEBUG_KMS("not found virtual device type encoder.\n"); |
| return -EINVAL; |
| } |
| |
| if (ctx->connected == vidi->connection) { |
| DRM_DEBUG_KMS("same connection request.\n"); |
| return -EINVAL; |
| } |
| |
| if (vidi->connection) { |
| struct edid *raw_edid = (struct edid *)(uint32_t)vidi->edid; |
| if (!drm_edid_is_valid(raw_edid)) { |
| DRM_DEBUG_KMS("edid data is invalid.\n"); |
| return -EINVAL; |
| } |
| ctx->raw_edid = drm_edid_duplicate(raw_edid); |
| if (!ctx->raw_edid) { |
| DRM_DEBUG_KMS("failed to allocate raw_edid.\n"); |
| return -ENOMEM; |
| } |
| } else { |
| /* |
| * with connection = 0, free raw_edid |
| * only if raw edid data isn't same as fake data. |
| */ |
| if (ctx->raw_edid && ctx->raw_edid != |
| (struct edid *)fake_edid_info) { |
| kfree(ctx->raw_edid); |
| ctx->raw_edid = NULL; |
| } |
| } |
| |
| ctx->connected = vidi->connection; |
| drm_helper_hpd_irq_event(ctx->subdrv.drm_dev); |
| |
| return 0; |
| } |
| |
| static int vidi_probe(struct platform_device *pdev) |
| { |
| struct device *dev = &pdev->dev; |
| struct vidi_context *ctx; |
| struct exynos_drm_subdrv *subdrv; |
| int ret; |
| |
| ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL); |
| if (!ctx) |
| return -ENOMEM; |
| |
| ctx->default_win = 0; |
| |
| INIT_WORK(&ctx->work, vidi_fake_vblank_handler); |
| |
| subdrv = &ctx->subdrv; |
| subdrv->dev = dev; |
| subdrv->manager = &vidi_manager; |
| subdrv->probe = vidi_subdrv_probe; |
| subdrv->remove = vidi_subdrv_remove; |
| |
| mutex_init(&ctx->lock); |
| |
| platform_set_drvdata(pdev, ctx); |
| |
| ret = device_create_file(dev, &dev_attr_connection); |
| if (ret < 0) |
| DRM_INFO("failed to create connection sysfs.\n"); |
| |
| exynos_drm_subdrv_register(subdrv); |
| |
| return 0; |
| } |
| |
| static int vidi_remove(struct platform_device *pdev) |
| { |
| struct vidi_context *ctx = platform_get_drvdata(pdev); |
| |
| exynos_drm_subdrv_unregister(&ctx->subdrv); |
| |
| if (ctx->raw_edid != (struct edid *)fake_edid_info) { |
| kfree(ctx->raw_edid); |
| ctx->raw_edid = NULL; |
| } |
| |
| return 0; |
| } |
| |
| #ifdef CONFIG_PM_SLEEP |
| static int vidi_suspend(struct device *dev) |
| { |
| struct vidi_context *ctx = get_vidi_context(dev); |
| |
| return vidi_power_on(ctx, false); |
| } |
| |
| static int vidi_resume(struct device *dev) |
| { |
| struct vidi_context *ctx = get_vidi_context(dev); |
| |
| return vidi_power_on(ctx, true); |
| } |
| #endif |
| |
| static const struct dev_pm_ops vidi_pm_ops = { |
| SET_SYSTEM_SLEEP_PM_OPS(vidi_suspend, vidi_resume) |
| }; |
| |
| struct platform_driver vidi_driver = { |
| .probe = vidi_probe, |
| .remove = vidi_remove, |
| .driver = { |
| .name = "exynos-drm-vidi", |
| .owner = THIS_MODULE, |
| .pm = &vidi_pm_ops, |
| }, |
| }; |