diff options
Diffstat (limited to 'drivers/gpu/drm/exynos/exynos_drm_vidi.c')
| -rw-r--r-- | drivers/gpu/drm/exynos/exynos_drm_vidi.c | 487 |
1 files changed, 487 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..f5e1adfca --- /dev/null +++ b/drivers/gpu/drm/exynos/exynos_drm_vidi.c @@ -0,0 +1,487 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* exynos_drm_vidi.c + * + * Copyright (C) 2012 Samsung Electronics Co.Ltd + * Authors: + * Inki Dae <inki.dae@samsung.com> + */ + +#include <linux/component.h> +#include <linux/kernel.h> +#include <linux/platform_device.h> +#include <linux/timer.h> + +#include <drm/drm_atomic_helper.h> +#include <drm/drm_edid.h> +#include <drm/drm_framebuffer.h> +#include <drm/drm_probe_helper.h> +#include <drm/drm_simple_kms_helper.h> +#include <drm/drm_vblank.h> +#include <drm/exynos_drm.h> + +#include "exynos_drm_crtc.h" +#include "exynos_drm_drv.h" +#include "exynos_drm_fb.h" +#include "exynos_drm_plane.h" +#include "exynos_drm_vidi.h" + +/* VIDI uses fixed refresh rate of 50Hz */ +#define VIDI_REFRESH_TIME (1000 / 50) + +/* 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 drm_encoder encoder; + struct drm_device *drm_dev; + struct device *dev; + struct exynos_drm_crtc *crtc; + struct drm_connector connector; + struct exynos_drm_plane planes[WINDOWS_NR]; + struct edid *raw_edid; + unsigned int clkdiv; + unsigned int connected; + bool suspended; + struct timer_list timer; + struct mutex lock; +}; + +static inline struct vidi_context *encoder_to_vidi(struct drm_encoder *e) +{ + return container_of(e, struct vidi_context, encoder); +} + +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 const uint32_t formats[] = { + DRM_FORMAT_XRGB8888, + DRM_FORMAT_ARGB8888, + DRM_FORMAT_NV12, +}; + +static const enum drm_plane_type vidi_win_types[WINDOWS_NR] = { + DRM_PLANE_TYPE_PRIMARY, + DRM_PLANE_TYPE_OVERLAY, + DRM_PLANE_TYPE_CURSOR, +}; + +static int vidi_enable_vblank(struct exynos_drm_crtc *crtc) +{ + struct vidi_context *ctx = crtc->ctx; + + if (ctx->suspended) + return -EPERM; + + mod_timer(&ctx->timer, + jiffies + msecs_to_jiffies(VIDI_REFRESH_TIME) - 1); + + return 0; +} + +static void vidi_disable_vblank(struct exynos_drm_crtc *crtc) +{ +} + +static void vidi_update_plane(struct exynos_drm_crtc *crtc, + struct exynos_drm_plane *plane) +{ + struct drm_plane_state *state = plane->base.state; + struct vidi_context *ctx = crtc->ctx; + dma_addr_t addr; + + if (ctx->suspended) + return; + + addr = exynos_drm_fb_dma_addr(state->fb, 0); + DRM_DEV_DEBUG_KMS(ctx->dev, "dma_addr = %pad\n", &addr); +} + +static void vidi_atomic_enable(struct exynos_drm_crtc *crtc) +{ + struct vidi_context *ctx = crtc->ctx; + + mutex_lock(&ctx->lock); + + ctx->suspended = false; + + mutex_unlock(&ctx->lock); + + drm_crtc_vblank_on(&crtc->base); +} + +static void vidi_atomic_disable(struct exynos_drm_crtc *crtc) +{ + struct vidi_context *ctx = crtc->ctx; + + drm_crtc_vblank_off(&crtc->base); + + mutex_lock(&ctx->lock); + + ctx->suspended = true; + + mutex_unlock(&ctx->lock); +} + +static const struct exynos_drm_crtc_ops vidi_crtc_ops = { + .atomic_enable = vidi_atomic_enable, + .atomic_disable = vidi_atomic_disable, + .enable_vblank = vidi_enable_vblank, + .disable_vblank = vidi_disable_vblank, + .update_plane = vidi_update_plane, + .atomic_flush = exynos_crtc_handle_event, +}; + +static void vidi_fake_vblank_timer(struct timer_list *t) +{ + struct vidi_context *ctx = from_timer(ctx, t, timer); + + if (drm_crtc_handle_vblank(&ctx->crtc->base)) + mod_timer(&ctx->timer, + jiffies + msecs_to_jiffies(VIDI_REFRESH_TIME) - 1); +} + +static ssize_t 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 ssize_t 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_DEV_DEBUG_KMS(dev, "edid data is not fake data.\n"); + return -EINVAL; + } + + DRM_DEV_DEBUG_KMS(dev, "requested connection.\n"); + + drm_helper_hpd_irq_event(ctx->drm_dev); + + return len; +} + +static DEVICE_ATTR(connection, 0644, vidi_show_connection, + vidi_store_connection); + +static struct attribute *vidi_attrs[] = { + &dev_attr_connection.attr, + NULL, +}; +ATTRIBUTE_GROUPS(vidi); + +int vidi_connection_ioctl(struct drm_device *drm_dev, void *data, + struct drm_file *file_priv) +{ + struct vidi_context *ctx = dev_get_drvdata(drm_dev->dev); + struct drm_exynos_vidi_connection *vidi = data; + + if (!vidi) { + DRM_DEV_DEBUG_KMS(ctx->dev, + "user data for vidi is null.\n"); + return -EINVAL; + } + + if (vidi->connection > 1) { + DRM_DEV_DEBUG_KMS(ctx->dev, + "connection should be 0 or 1.\n"); + return -EINVAL; + } + + if (ctx->connected == vidi->connection) { + DRM_DEV_DEBUG_KMS(ctx->dev, + "same connection request.\n"); + return -EINVAL; + } + + if (vidi->connection) { + struct edid *raw_edid; + + raw_edid = (struct edid *)(unsigned long)vidi->edid; + if (!drm_edid_is_valid(raw_edid)) { + DRM_DEV_DEBUG_KMS(ctx->dev, + "edid data is invalid.\n"); + return -EINVAL; + } + ctx->raw_edid = drm_edid_duplicate(raw_edid); + if (!ctx->raw_edid) { + DRM_DEV_DEBUG_KMS(ctx->dev, + "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 const struct drm_connector_funcs vidi_connector_funcs = { + .fill_modes = drm_helper_probe_single_connector_modes, + .detect = vidi_detect, + .destroy = vidi_connector_destroy, + .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 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_DEV_DEBUG_KMS(ctx->dev, "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_DEV_DEBUG_KMS(ctx->dev, "failed to allocate edid\n"); + return -ENOMEM; + } + + drm_connector_update_edid_property(connector, edid); + + return drm_add_edid_modes(connector, edid); +} + +static const struct drm_connector_helper_funcs vidi_connector_helper_funcs = { + .get_modes = vidi_get_modes, +}; + +static int vidi_create_connector(struct drm_encoder *encoder) +{ + struct vidi_context *ctx = encoder_to_vidi(encoder); + struct drm_connector *connector = &ctx->connector; + int ret; + + connector->polled = DRM_CONNECTOR_POLL_HPD; + + ret = drm_connector_init(ctx->drm_dev, connector, + &vidi_connector_funcs, DRM_MODE_CONNECTOR_VIRTUAL); + if (ret) { + DRM_DEV_ERROR(ctx->dev, + "Failed to initialize connector with drm\n"); + return ret; + } + + drm_connector_helper_add(connector, &vidi_connector_helper_funcs); + drm_connector_attach_encoder(connector, encoder); + + return 0; +} + +static void exynos_vidi_mode_set(struct drm_encoder *encoder, + struct drm_display_mode *mode, + struct drm_display_mode *adjusted_mode) +{ +} + +static void exynos_vidi_enable(struct drm_encoder *encoder) +{ +} + +static void exynos_vidi_disable(struct drm_encoder *encoder) +{ +} + +static const struct drm_encoder_helper_funcs exynos_vidi_encoder_helper_funcs = { + .mode_set = exynos_vidi_mode_set, + .enable = exynos_vidi_enable, + .disable = exynos_vidi_disable, +}; + +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 drm_encoder *encoder = &ctx->encoder; + struct exynos_drm_plane *exynos_plane; + struct exynos_drm_plane_config plane_config = { 0 }; + unsigned int i; + int ret; + + ctx->drm_dev = drm_dev; + + plane_config.pixel_formats = formats; + plane_config.num_pixel_formats = ARRAY_SIZE(formats); + + for (i = 0; i < WINDOWS_NR; i++) { + plane_config.zpos = i; + plane_config.type = vidi_win_types[i]; + + ret = exynos_plane_init(drm_dev, &ctx->planes[i], i, + &plane_config); + if (ret) + return ret; + } + + exynos_plane = &ctx->planes[DEFAULT_WIN]; + ctx->crtc = exynos_drm_crtc_create(drm_dev, &exynos_plane->base, + EXYNOS_DISPLAY_TYPE_VIDI, &vidi_crtc_ops, ctx); + if (IS_ERR(ctx->crtc)) { + DRM_DEV_ERROR(dev, "failed to create crtc.\n"); + return PTR_ERR(ctx->crtc); + } + + drm_simple_encoder_init(drm_dev, encoder, DRM_MODE_ENCODER_TMDS); + + drm_encoder_helper_add(encoder, &exynos_vidi_encoder_helper_funcs); + + ret = exynos_drm_set_possible_crtcs(encoder, EXYNOS_DISPLAY_TYPE_VIDI); + if (ret < 0) + return ret; + + ret = vidi_create_connector(encoder); + if (ret) { + DRM_DEV_ERROR(dev, "failed to create connector ret = %d\n", + ret); + drm_encoder_cleanup(encoder); + return ret; + } + + return 0; +} + + +static void vidi_unbind(struct device *dev, struct device *master, void *data) +{ + struct vidi_context *ctx = dev_get_drvdata(dev); + + del_timer_sync(&ctx->timer); +} + +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; + struct device *dev = &pdev->dev; + + ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL); + if (!ctx) + return -ENOMEM; + + ctx->dev = dev; + + timer_setup(&ctx->timer, vidi_fake_vblank_timer, 0); + + mutex_init(&ctx->lock); + + platform_set_drvdata(pdev, ctx); + + return component_add(dev, &vidi_component_ops); +} + +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; + } + + component_del(&pdev->dev, &vidi_component_ops); + + return 0; +} + +struct platform_driver vidi_driver = { + .probe = vidi_probe, + .remove = vidi_remove, + .driver = { + .name = "exynos-drm-vidi", + .owner = THIS_MODULE, + .dev_groups = vidi_groups, + }, +}; |