diff options
Diffstat (limited to 'drivers/gpu/drm/exynos/exynos_drm_vidi.c')
| -rw-r--r-- | drivers/gpu/drm/exynos/exynos_drm_vidi.c | 621 |
1 files changed, 621 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 000000000..1b3479a8d --- /dev/null +++ b/drivers/gpu/drm/exynos/exynos_drm_vidi.c @@ -0,0 +1,621 @@ +/* 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 <linux/component.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_plane.h" +#include "exynos_drm_encoder.h" +#include "exynos_drm_vidi.h" + +/* vidi has totally three virtual windows. */ +#define WINDOWS_NR 3 + +#define ctx_from_connector(c) container_of(c, struct vidi_context, \ + connector) + +struct vidi_context { + struct exynos_drm_display display; + struct platform_device *pdev; + struct drm_device *drm_dev; + struct exynos_drm_crtc *crtc; + struct drm_encoder *encoder; + struct drm_connector connector; + struct exynos_drm_plane planes[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; + int pipe; +}; + +static inline struct vidi_context *display_to_vidi(struct exynos_drm_display *d) +{ + return container_of(d, struct vidi_context, display); +} + +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 int vidi_enable_vblank(struct exynos_drm_crtc *crtc) +{ + struct vidi_context *ctx = crtc->ctx; + + 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 crtc_ops->win_commit callback + */ + schedule_work(&ctx->work); + + return 0; +} + +static void vidi_disable_vblank(struct exynos_drm_crtc *crtc) +{ + struct vidi_context *ctx = crtc->ctx; + + if (ctx->suspended) + return; + + if (test_and_clear_bit(0, &ctx->irq_flags)) + ctx->vblank_on = false; +} + +static void vidi_win_commit(struct exynos_drm_crtc *crtc, unsigned int win) +{ + struct vidi_context *ctx = crtc->ctx; + struct exynos_drm_plane *plane; + + if (ctx->suspended) + return; + + if (win < 0 || win >= WINDOWS_NR) + return; + + plane = &ctx->planes[win]; + + plane->enabled = true; + + DRM_DEBUG_KMS("dma_addr = %pad\n", plane->dma_addr); + + if (ctx->vblank_on) + schedule_work(&ctx->work); +} + +static void vidi_win_disable(struct exynos_drm_crtc *crtc, unsigned int win) +{ + struct vidi_context *ctx = crtc->ctx; + struct exynos_drm_plane *plane; + + if (win < 0 || win >= WINDOWS_NR) + return; + + plane = &ctx->planes[win]; + plane->enabled = false; + + /* TODO. */ +} + +static int vidi_power_on(struct vidi_context *ctx, bool enable) +{ + struct exynos_drm_plane *plane; + int i; + + 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(ctx->crtc); + + for (i = 0; i < WINDOWS_NR; i++) { + plane = &ctx->planes[i]; + if (plane->enabled) + vidi_win_commit(ctx->crtc, i); + } + } else { + ctx->suspended = true; + } + + return 0; +} + +static void vidi_dpms(struct exynos_drm_crtc *crtc, int mode) +{ + struct vidi_context *ctx = crtc->ctx; + + DRM_DEBUG_KMS("%d\n", mode); + + mutex_lock(&ctx->lock); + + switch (mode) { + case DRM_MODE_DPMS_ON: + vidi_power_on(ctx, true); + break; + case DRM_MODE_DPMS_STANDBY: + case DRM_MODE_DPMS_SUSPEND: + case DRM_MODE_DPMS_OFF: + vidi_power_on(ctx, false); + break; + default: + DRM_DEBUG_KMS("unspecified mode %d\n", mode); + break; + } + + mutex_unlock(&ctx->lock); +} + +static int vidi_ctx_initialize(struct vidi_context *ctx, + struct drm_device *drm_dev) +{ + struct exynos_drm_private *priv = drm_dev->dev_private; + + ctx->drm_dev = drm_dev; + ctx->pipe = priv->pipe++; + + return 0; +} + +static const struct exynos_drm_crtc_ops vidi_crtc_ops = { + .dpms = vidi_dpms, + .enable_vblank = vidi_enable_vblank, + .disable_vblank = vidi_disable_vblank, + .win_commit = vidi_win_commit, + .win_disable = vidi_win_disable, +}; + +static void vidi_fake_vblank_handler(struct work_struct *work) +{ + struct vidi_context *ctx = container_of(work, struct vidi_context, + work); + + if (ctx->pipe < 0) + return; + + /* refresh rate is about 50Hz. */ + usleep_range(16000, 20000); + + mutex_lock(&ctx->lock); + + if (ctx->direct_vblank) { + drm_handle_vblank(ctx->drm_dev, ctx->pipe); + ctx->direct_vblank = false; + mutex_unlock(&ctx->lock); + return; + } + + mutex_unlock(&ctx->lock); + + exynos_drm_crtc_finish_pageflip(ctx->drm_dev, ctx->pipe); +} + +static int vidi_show_connection(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct vidi_context *ctx = dev_get_drvdata(dev); + int rc; + + 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 = dev_get_drvdata(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->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_display *display; + 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) { + display = exynos_drm_get_display(encoder); + + if (display->type == EXYNOS_DISPLAY_TYPE_VIDI) { + ctx = display_to_vidi(display); + 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->drm_dev); + + return 0; +} + +static enum drm_connector_status vidi_detect(struct drm_connector *connector, + bool force) +{ + struct vidi_context *ctx = ctx_from_connector(connector); + + /* + * connection request would come from user side + * to do hotplug through specific ioctl. + */ + return ctx->connected ? connector_status_connected : + connector_status_disconnected; +} + +static void vidi_connector_destroy(struct drm_connector *connector) +{ +} + +static struct drm_connector_funcs vidi_connector_funcs = { + .dpms = drm_helper_connector_dpms, + .fill_modes = drm_helper_probe_single_connector_modes, + .detect = vidi_detect, + .destroy = vidi_connector_destroy, +}; + +static int vidi_get_modes(struct drm_connector *connector) +{ + struct vidi_context *ctx = ctx_from_connector(connector); + struct edid *edid; + int edid_len; + + /* + * 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; + } + + edid_len = (1 + ctx->raw_edid->extensions) * EDID_LENGTH; + edid = kmemdup(ctx->raw_edid, edid_len, GFP_KERNEL); + if (!edid) { + DRM_DEBUG_KMS("failed to allocate edid\n"); + return -ENOMEM; + } + + drm_mode_connector_update_edid_property(connector, edid); + + return drm_add_edid_modes(connector, edid); +} + +static struct drm_encoder *vidi_best_encoder(struct drm_connector *connector) +{ + struct vidi_context *ctx = ctx_from_connector(connector); + + return ctx->encoder; +} + +static struct drm_connector_helper_funcs vidi_connector_helper_funcs = { + .get_modes = vidi_get_modes, + .best_encoder = vidi_best_encoder, +}; + +static int vidi_create_connector(struct exynos_drm_display *display, + struct drm_encoder *encoder) +{ + struct vidi_context *ctx = display_to_vidi(display); + struct drm_connector *connector = &ctx->connector; + int ret; + + ctx->encoder = encoder; + connector->polled = DRM_CONNECTOR_POLL_HPD; + + ret = drm_connector_init(ctx->drm_dev, connector, + &vidi_connector_funcs, DRM_MODE_CONNECTOR_VIRTUAL); + if (ret) { + DRM_ERROR("Failed to initialize connector with drm\n"); + return ret; + } + + drm_connector_helper_add(connector, &vidi_connector_helper_funcs); + drm_connector_register(connector); + drm_mode_connector_attach_encoder(connector, encoder); + + return 0; +} + + +static struct exynos_drm_display_ops vidi_display_ops = { + .create_connector = vidi_create_connector, +}; + +static int vidi_bind(struct device *dev, struct device *master, void *data) +{ + struct vidi_context *ctx = dev_get_drvdata(dev); + struct drm_device *drm_dev = data; + struct exynos_drm_plane *exynos_plane; + enum drm_plane_type type; + unsigned int zpos; + int ret; + + vidi_ctx_initialize(ctx, drm_dev); + + for (zpos = 0; zpos < WINDOWS_NR; zpos++) { + type = (zpos == ctx->default_win) ? DRM_PLANE_TYPE_PRIMARY : + DRM_PLANE_TYPE_OVERLAY; + ret = exynos_plane_init(drm_dev, &ctx->planes[zpos], + 1 << ctx->pipe, type, zpos); + if (ret) + return ret; + } + + exynos_plane = &ctx->planes[ctx->default_win]; + ctx->crtc = exynos_drm_crtc_create(drm_dev, &exynos_plane->base, + ctx->pipe, EXYNOS_DISPLAY_TYPE_VIDI, + &vidi_crtc_ops, ctx); + if (IS_ERR(ctx->crtc)) { + DRM_ERROR("failed to create crtc.\n"); + return PTR_ERR(ctx->crtc); + } + + ret = exynos_drm_create_enc_conn(drm_dev, &ctx->display); + if (ret) { + ctx->crtc->base.funcs->destroy(&ctx->crtc->base); + return ret; + } + + return 0; +} + + +static void vidi_unbind(struct device *dev, struct device *master, void *data) +{ +} + +static const struct component_ops vidi_component_ops = { + .bind = vidi_bind, + .unbind = vidi_unbind, +}; + +static int vidi_probe(struct platform_device *pdev) +{ + struct vidi_context *ctx; + int ret; + + ctx = devm_kzalloc(&pdev->dev, sizeof(*ctx), GFP_KERNEL); + if (!ctx) + return -ENOMEM; + + ctx->display.type = EXYNOS_DISPLAY_TYPE_VIDI; + ctx->display.ops = &vidi_display_ops; + ctx->default_win = 0; + ctx->pdev = pdev; + + ret = exynos_drm_component_add(&pdev->dev, EXYNOS_DEVICE_TYPE_CRTC, + EXYNOS_DISPLAY_TYPE_VIDI); + if (ret) + return ret; + + ret = exynos_drm_component_add(&pdev->dev, EXYNOS_DEVICE_TYPE_CONNECTOR, + ctx->display.type); + if (ret) + goto err_del_crtc_component; + + INIT_WORK(&ctx->work, vidi_fake_vblank_handler); + + mutex_init(&ctx->lock); + + platform_set_drvdata(pdev, ctx); + + ret = device_create_file(&pdev->dev, &dev_attr_connection); + if (ret < 0) { + DRM_ERROR("failed to create connection sysfs.\n"); + goto err_del_conn_component; + } + + ret = component_add(&pdev->dev, &vidi_component_ops); + if (ret) + goto err_remove_file; + + return ret; + +err_remove_file: + device_remove_file(&pdev->dev, &dev_attr_connection); +err_del_conn_component: + exynos_drm_component_del(&pdev->dev, EXYNOS_DEVICE_TYPE_CONNECTOR); +err_del_crtc_component: + exynos_drm_component_del(&pdev->dev, EXYNOS_DEVICE_TYPE_CRTC); + + return ret; +} + +static int vidi_remove(struct platform_device *pdev) +{ + struct vidi_context *ctx = platform_get_drvdata(pdev); + + if (ctx->raw_edid != (struct edid *)fake_edid_info) { + kfree(ctx->raw_edid); + ctx->raw_edid = NULL; + + return -EINVAL; + } + + component_del(&pdev->dev, &vidi_component_ops); + exynos_drm_component_del(&pdev->dev, EXYNOS_DEVICE_TYPE_CONNECTOR); + exynos_drm_component_del(&pdev->dev, EXYNOS_DEVICE_TYPE_CRTC); + + return 0; +} + +struct platform_driver vidi_driver = { + .probe = vidi_probe, + .remove = vidi_remove, + .driver = { + .name = "exynos-drm-vidi", + .owner = THIS_MODULE, + }, +}; + +int exynos_drm_probe_vidi(void) +{ + struct platform_device *pdev; + int ret; + + pdev = platform_device_register_simple("exynos-drm-vidi", -1, NULL, 0); + if (IS_ERR(pdev)) + return PTR_ERR(pdev); + + ret = platform_driver_register(&vidi_driver); + if (ret) { + platform_device_unregister(pdev); + return ret; + } + + return ret; +} + +static int exynos_drm_remove_vidi_device(struct device *dev, void *data) +{ + platform_device_unregister(to_platform_device(dev)); + + return 0; +} + +void exynos_drm_remove_vidi(void) +{ + int ret = driver_for_each_device(&vidi_driver.driver, NULL, NULL, + exynos_drm_remove_vidi_device); + /* silence compiler warning */ + (void)ret; + + platform_driver_unregister(&vidi_driver); +} |