diff options
Diffstat (limited to 'drivers/gpu/drm/exynos/exynos_drm_vidi.c')
| -rw-r--r-- | drivers/gpu/drm/exynos/exynos_drm_vidi.c | 680 |
1 files changed, 680 insertions, 0 deletions
diff --git a/drivers/gpu/drm/exynos/exynos_drm_vidi.c b/drivers/gpu/drm/exynos/exynos_drm_vidi.c new file mode 100644 index 000000000000..7b9c153dceb6 --- /dev/null +++ b/drivers/gpu/drm/exynos/exynos_drm_vidi.c @@ -0,0 +1,680 @@ +/* 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 "drmP.h" + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/platform_device.h> + +#include <drm/exynos_drm.h> + +#include "drm_edid.h" +#include "drm_crtc_helper.h" + +#include "exynos_drm_drv.h" +#include "exynos_drm_crtc.h" +#include "exynos_drm_encoder.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; + void __iomem *vaddr; + 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; + 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 void vidi_fake_vblank_handler(struct work_struct *work); + +static bool vidi_display_is_connected(struct device *dev) +{ + struct vidi_context *ctx = get_vidi_context(dev); + + DRM_DEBUG_KMS("%s\n", __FILE__); + + /* + * connection request would come from user side + * to do hotplug through specific ioctl. + */ + return ctx->connected ? true : false; +} + +static int vidi_get_edid(struct device *dev, struct drm_connector *connector, + u8 *edid, int len) +{ + struct vidi_context *ctx = get_vidi_context(dev); + struct edid *raw_edid; + + DRM_DEBUG_KMS("%s\n", __FILE__); + + /* + * 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 -EFAULT; + } + + raw_edid = kzalloc(len, GFP_KERNEL); + if (!raw_edid) { + DRM_DEBUG_KMS("failed to allocate raw_edid.\n"); + return -ENOMEM; + } + + memcpy(raw_edid, ctx->raw_edid, min((1 + ctx->raw_edid->extensions) + * EDID_LENGTH, len)); + + /* attach the edid data to connector. */ + connector->display_info.raw_edid = (char *)raw_edid; + + memcpy(edid, ctx->raw_edid, min((1 + ctx->raw_edid->extensions) + * EDID_LENGTH, len)); + + return 0; +} + +static void *vidi_get_panel(struct device *dev) +{ + DRM_DEBUG_KMS("%s\n", __FILE__); + + /* TODO. */ + + return NULL; +} + +static int vidi_check_timing(struct device *dev, void *timing) +{ + DRM_DEBUG_KMS("%s\n", __FILE__); + + /* TODO. */ + + return 0; +} + +static int vidi_display_power_on(struct device *dev, int mode) +{ + DRM_DEBUG_KMS("%s\n", __FILE__); + + /* 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_timing = vidi_check_timing, + .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("%s, %d\n", __FILE__, 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; + + DRM_DEBUG_KMS("%s\n", __FILE__); + + 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); + + DRM_DEBUG_KMS("%s\n", __FILE__); + + if (ctx->suspended) + return; +} + +static int vidi_enable_vblank(struct device *dev) +{ + struct vidi_context *ctx = get_vidi_context(dev); + + DRM_DEBUG_KMS("%s\n", __FILE__); + + if (ctx->suspended) + return -EPERM; + + if (!test_and_set_bit(0, &ctx->irq_flags)) + ctx->vblank_on = true; + + return 0; +} + +static void vidi_disable_vblank(struct device *dev) +{ + struct vidi_context *ctx = get_vidi_context(dev); + + DRM_DEBUG_KMS("%s\n", __FILE__); + + 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; + + DRM_DEBUG_KMS("%s\n", __FILE__); + + 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->vaddr = overlay->vaddr[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, vaddr = 0x%lx\n", + (unsigned long)win_data->dma_addr, + (unsigned long)win_data->vaddr); + 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; + + DRM_DEBUG_KMS("%s\n", __FILE__); + + 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; + + DRM_DEBUG_KMS("%s\n", __FILE__); + + 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_finish_pageflip(struct drm_device *drm_dev, int crtc) +{ + struct exynos_drm_private *dev_priv = drm_dev->dev_private; + struct drm_pending_vblank_event *e, *t; + struct timeval now; + unsigned long flags; + bool is_checked = false; + + spin_lock_irqsave(&drm_dev->event_lock, flags); + + list_for_each_entry_safe(e, t, &dev_priv->pageflip_event_list, + base.link) { + /* if event's pipe isn't same as crtc then ignore it. */ + if (crtc != e->pipe) + continue; + + is_checked = true; + + do_gettimeofday(&now); + e->event.sequence = 0; + e->event.tv_sec = now.tv_sec; + e->event.tv_usec = now.tv_usec; + + list_move_tail(&e->base.link, &e->base.file_priv->event_list); + wake_up_interruptible(&e->base.file_priv->event_wait); + } + + if (is_checked) { + /* + * call drm_vblank_put only in case that drm_vblank_get was + * called. + */ + if (atomic_read(&drm_dev->vblank_refcount[crtc]) > 0) + drm_vblank_put(drm_dev, crtc); + + /* + * don't off vblank if vblank_disable_allowed is 1, + * because vblank would be off by timer handler. + */ + if (!drm_dev->vblank_disable_allowed) + drm_vblank_off(drm_dev, crtc); + } + + spin_unlock_irqrestore(&drm_dev->event_lock, flags); +} + +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); + + drm_handle_vblank(subdrv->drm_dev, manager->pipe); + vidi_finish_pageflip(subdrv->drm_dev, manager->pipe); +} + +static int vidi_subdrv_probe(struct drm_device *drm_dev, struct device *dev) +{ + DRM_DEBUG_KMS("%s\n", __FILE__); + + /* + * enable drm irq mode. + * - with irq_enabled = 1, 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 = 1; + + /* + * with vblank_disable_allowed = 1, 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 = 1; + + return 0; +} + +static void vidi_subdrv_remove(struct drm_device *drm_dev) +{ + DRM_DEBUG_KMS("%s\n", __FILE__); + + /* TODO. */ +} + +static int vidi_power_on(struct vidi_context *ctx, bool enable) +{ + struct exynos_drm_subdrv *subdrv = &ctx->subdrv; + struct device *dev = subdrv->dev; + + DRM_DEBUG_KMS("%s\n", __FILE__); + + if (enable != false && enable != true) + return -EINVAL; + + 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; + + DRM_DEBUG_KMS("%s\n", __FILE__); + + ret = kstrtoint(buf, 0, &ctx->connected); + if (ret) + return ret; + + if (ctx->connected > 1) + 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; + + DRM_DEBUG_KMS("%s\n", __FILE__); + + if (!vidi) { + DRM_DEBUG_KMS("user data for vidi is null.\n"); + return -EINVAL; + } + + if (!vidi->edid) { + DRM_DEBUG_KMS("edid data 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) + ctx->raw_edid = (struct edid *)vidi->edid; + + ctx->connected = vidi->connection; + drm_helper_hpd_irq_event(ctx->subdrv.drm_dev); + + return 0; +} + +static int __devinit vidi_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct vidi_context *ctx; + struct exynos_drm_subdrv *subdrv; + int ret; + + DRM_DEBUG_KMS("%s\n", __FILE__); + + ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); + if (!ctx) + return -ENOMEM; + + ctx->default_win = 0; + + INIT_WORK(&ctx->work, vidi_fake_vblank_handler); + + /* for test */ + ctx->raw_edid = (struct edid *)fake_edid_info; + + 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(&pdev->dev, &dev_attr_connection); + if (ret < 0) + DRM_INFO("failed to create connection sysfs.\n"); + + exynos_drm_subdrv_register(subdrv); + + return 0; +} + +static int __devexit vidi_remove(struct platform_device *pdev) +{ + struct vidi_context *ctx = platform_get_drvdata(pdev); + + DRM_DEBUG_KMS("%s\n", __FILE__); + + exynos_drm_subdrv_unregister(&ctx->subdrv); + + kfree(ctx); + + 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 = __devexit_p(vidi_remove), + .driver = { + .name = "exynos-drm-vidi", + .owner = THIS_MODULE, + .pm = &vidi_pm_ops, + }, +}; |