503 lines
12 KiB
C
503 lines
12 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/* exynos_drm_vidi.c
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*
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* Copyright (C) 2012 Samsung Electronics Co.Ltd
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* Authors:
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* Inki Dae <inki.dae@samsung.com>
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*/
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#include <linux/component.h>
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#include <linux/kernel.h>
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#include <linux/platform_device.h>
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#include <linux/timer.h>
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#include <drm/drm_atomic_helper.h>
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#include <drm/drm_edid.h>
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#include <drm/drm_probe_helper.h>
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#include <drm/drm_vblank.h>
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#include <drm/exynos_drm.h>
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#include "exynos_drm_crtc.h"
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#include "exynos_drm_drv.h"
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#include "exynos_drm_fb.h"
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#include "exynos_drm_plane.h"
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#include "exynos_drm_vidi.h"
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/* VIDI uses fixed refresh rate of 50Hz */
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#define VIDI_REFRESH_TIME (1000 / 50)
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/* vidi has totally three virtual windows. */
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#define WINDOWS_NR 3
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#define ctx_from_connector(c) container_of(c, struct vidi_context, \
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connector)
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struct vidi_context {
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struct drm_encoder encoder;
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struct drm_device *drm_dev;
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struct device *dev;
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struct exynos_drm_crtc *crtc;
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struct drm_connector connector;
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struct exynos_drm_plane planes[WINDOWS_NR];
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struct edid *raw_edid;
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unsigned int clkdiv;
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unsigned int connected;
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bool suspended;
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struct timer_list timer;
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struct mutex lock;
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};
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static inline struct vidi_context *encoder_to_vidi(struct drm_encoder *e)
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{
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return container_of(e, struct vidi_context, encoder);
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}
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static const char fake_edid_info[] = {
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0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x4c, 0x2d, 0x05, 0x05,
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0x00, 0x00, 0x00, 0x00, 0x30, 0x12, 0x01, 0x03, 0x80, 0x10, 0x09, 0x78,
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0x0a, 0xee, 0x91, 0xa3, 0x54, 0x4c, 0x99, 0x26, 0x0f, 0x50, 0x54, 0xbd,
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0xee, 0x00, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
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0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x66, 0x21, 0x50, 0xb0, 0x51, 0x00,
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0x1b, 0x30, 0x40, 0x70, 0x36, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e,
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0x01, 0x1d, 0x00, 0x72, 0x51, 0xd0, 0x1e, 0x20, 0x6e, 0x28, 0x55, 0x00,
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0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, 0x00, 0x00, 0x00, 0xfd, 0x00, 0x18,
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0x4b, 0x1a, 0x44, 0x17, 0x00, 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
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0x00, 0x00, 0x00, 0xfc, 0x00, 0x53, 0x41, 0x4d, 0x53, 0x55, 0x4e, 0x47,
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0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x01, 0xbc, 0x02, 0x03, 0x1e, 0xf1,
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0x46, 0x84, 0x05, 0x03, 0x10, 0x20, 0x22, 0x23, 0x09, 0x07, 0x07, 0x83,
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0x01, 0x00, 0x00, 0xe2, 0x00, 0x0f, 0x67, 0x03, 0x0c, 0x00, 0x10, 0x00,
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0xb8, 0x2d, 0x01, 0x1d, 0x80, 0x18, 0x71, 0x1c, 0x16, 0x20, 0x58, 0x2c,
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0x25, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x9e, 0x8c, 0x0a, 0xd0, 0x8a,
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0x20, 0xe0, 0x2d, 0x10, 0x10, 0x3e, 0x96, 0x00, 0xa0, 0x5a, 0x00, 0x00,
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0x00, 0x18, 0x02, 0x3a, 0x80, 0x18, 0x71, 0x38, 0x2d, 0x40, 0x58, 0x2c,
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0x45, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x06
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};
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static const uint32_t formats[] = {
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DRM_FORMAT_XRGB8888,
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DRM_FORMAT_ARGB8888,
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DRM_FORMAT_NV12,
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};
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static const enum drm_plane_type vidi_win_types[WINDOWS_NR] = {
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DRM_PLANE_TYPE_PRIMARY,
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DRM_PLANE_TYPE_OVERLAY,
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DRM_PLANE_TYPE_CURSOR,
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};
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static int vidi_enable_vblank(struct exynos_drm_crtc *crtc)
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{
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struct vidi_context *ctx = crtc->ctx;
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if (ctx->suspended)
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return -EPERM;
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mod_timer(&ctx->timer,
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jiffies + msecs_to_jiffies(VIDI_REFRESH_TIME) - 1);
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return 0;
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}
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static void vidi_disable_vblank(struct exynos_drm_crtc *crtc)
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{
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}
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static void vidi_update_plane(struct exynos_drm_crtc *crtc,
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struct exynos_drm_plane *plane)
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{
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struct drm_plane_state *state = plane->base.state;
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struct vidi_context *ctx = crtc->ctx;
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dma_addr_t addr;
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if (ctx->suspended)
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return;
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addr = exynos_drm_fb_dma_addr(state->fb, 0);
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DRM_DEV_DEBUG_KMS(ctx->dev, "dma_addr = %pad\n", &addr);
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}
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static void vidi_enable(struct exynos_drm_crtc *crtc)
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{
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struct vidi_context *ctx = crtc->ctx;
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mutex_lock(&ctx->lock);
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ctx->suspended = false;
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mutex_unlock(&ctx->lock);
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drm_crtc_vblank_on(&crtc->base);
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}
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static void vidi_disable(struct exynos_drm_crtc *crtc)
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{
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struct vidi_context *ctx = crtc->ctx;
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drm_crtc_vblank_off(&crtc->base);
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mutex_lock(&ctx->lock);
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ctx->suspended = true;
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mutex_unlock(&ctx->lock);
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}
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static const struct exynos_drm_crtc_ops vidi_crtc_ops = {
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.enable = vidi_enable,
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.disable = vidi_disable,
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.enable_vblank = vidi_enable_vblank,
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.disable_vblank = vidi_disable_vblank,
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.update_plane = vidi_update_plane,
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.atomic_flush = exynos_crtc_handle_event,
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};
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static void vidi_fake_vblank_timer(struct timer_list *t)
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{
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struct vidi_context *ctx = from_timer(ctx, t, timer);
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if (drm_crtc_handle_vblank(&ctx->crtc->base))
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mod_timer(&ctx->timer,
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jiffies + msecs_to_jiffies(VIDI_REFRESH_TIME) - 1);
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}
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static ssize_t vidi_show_connection(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct vidi_context *ctx = dev_get_drvdata(dev);
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int rc;
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mutex_lock(&ctx->lock);
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rc = sprintf(buf, "%d\n", ctx->connected);
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mutex_unlock(&ctx->lock);
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return rc;
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}
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static ssize_t vidi_store_connection(struct device *dev,
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struct device_attribute *attr,
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const char *buf, size_t len)
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{
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struct vidi_context *ctx = dev_get_drvdata(dev);
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int ret;
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ret = kstrtoint(buf, 0, &ctx->connected);
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if (ret)
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return ret;
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if (ctx->connected > 1)
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return -EINVAL;
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/* use fake edid data for test. */
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if (!ctx->raw_edid)
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ctx->raw_edid = (struct edid *)fake_edid_info;
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/* if raw_edid isn't same as fake data then it can't be tested. */
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if (ctx->raw_edid != (struct edid *)fake_edid_info) {
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DRM_DEV_DEBUG_KMS(dev, "edid data is not fake data.\n");
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return -EINVAL;
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}
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DRM_DEV_DEBUG_KMS(dev, "requested connection.\n");
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drm_helper_hpd_irq_event(ctx->drm_dev);
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return len;
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}
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static DEVICE_ATTR(connection, 0644, vidi_show_connection,
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vidi_store_connection);
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int vidi_connection_ioctl(struct drm_device *drm_dev, void *data,
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struct drm_file *file_priv)
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{
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struct vidi_context *ctx = dev_get_drvdata(drm_dev->dev);
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struct drm_exynos_vidi_connection *vidi = data;
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if (!vidi) {
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DRM_DEV_DEBUG_KMS(ctx->dev,
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"user data for vidi is null.\n");
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return -EINVAL;
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}
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if (vidi->connection > 1) {
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DRM_DEV_DEBUG_KMS(ctx->dev,
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"connection should be 0 or 1.\n");
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return -EINVAL;
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}
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if (ctx->connected == vidi->connection) {
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DRM_DEV_DEBUG_KMS(ctx->dev,
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"same connection request.\n");
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return -EINVAL;
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}
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if (vidi->connection) {
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struct edid *raw_edid;
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raw_edid = (struct edid *)(unsigned long)vidi->edid;
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if (!drm_edid_is_valid(raw_edid)) {
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DRM_DEV_DEBUG_KMS(ctx->dev,
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"edid data is invalid.\n");
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return -EINVAL;
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}
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ctx->raw_edid = drm_edid_duplicate(raw_edid);
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if (!ctx->raw_edid) {
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DRM_DEV_DEBUG_KMS(ctx->dev,
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"failed to allocate raw_edid.\n");
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return -ENOMEM;
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}
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} else {
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/*
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* with connection = 0, free raw_edid
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* only if raw edid data isn't same as fake data.
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*/
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if (ctx->raw_edid && ctx->raw_edid !=
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(struct edid *)fake_edid_info) {
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kfree(ctx->raw_edid);
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ctx->raw_edid = NULL;
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}
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}
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ctx->connected = vidi->connection;
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drm_helper_hpd_irq_event(ctx->drm_dev);
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return 0;
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}
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static enum drm_connector_status vidi_detect(struct drm_connector *connector,
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bool force)
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{
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struct vidi_context *ctx = ctx_from_connector(connector);
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/*
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* connection request would come from user side
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* to do hotplug through specific ioctl.
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*/
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return ctx->connected ? connector_status_connected :
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connector_status_disconnected;
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}
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static void vidi_connector_destroy(struct drm_connector *connector)
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{
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}
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static const struct drm_connector_funcs vidi_connector_funcs = {
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.fill_modes = drm_helper_probe_single_connector_modes,
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.detect = vidi_detect,
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.destroy = vidi_connector_destroy,
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.reset = drm_atomic_helper_connector_reset,
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.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
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.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
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};
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static int vidi_get_modes(struct drm_connector *connector)
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{
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struct vidi_context *ctx = ctx_from_connector(connector);
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struct edid *edid;
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int edid_len;
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/*
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* the edid data comes from user side and it would be set
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* to ctx->raw_edid through specific ioctl.
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*/
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if (!ctx->raw_edid) {
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DRM_DEV_DEBUG_KMS(ctx->dev, "raw_edid is null.\n");
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return -EFAULT;
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}
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edid_len = (1 + ctx->raw_edid->extensions) * EDID_LENGTH;
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edid = kmemdup(ctx->raw_edid, edid_len, GFP_KERNEL);
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if (!edid) {
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DRM_DEV_DEBUG_KMS(ctx->dev, "failed to allocate edid\n");
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return -ENOMEM;
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}
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drm_connector_update_edid_property(connector, edid);
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return drm_add_edid_modes(connector, edid);
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}
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static const struct drm_connector_helper_funcs vidi_connector_helper_funcs = {
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.get_modes = vidi_get_modes,
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};
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static int vidi_create_connector(struct drm_encoder *encoder)
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{
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struct vidi_context *ctx = encoder_to_vidi(encoder);
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struct drm_connector *connector = &ctx->connector;
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int ret;
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connector->polled = DRM_CONNECTOR_POLL_HPD;
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ret = drm_connector_init(ctx->drm_dev, connector,
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&vidi_connector_funcs, DRM_MODE_CONNECTOR_VIRTUAL);
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if (ret) {
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DRM_DEV_ERROR(ctx->dev,
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"Failed to initialize connector with drm\n");
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return ret;
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}
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drm_connector_helper_add(connector, &vidi_connector_helper_funcs);
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drm_connector_attach_encoder(connector, encoder);
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return 0;
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}
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static void exynos_vidi_mode_set(struct drm_encoder *encoder,
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struct drm_display_mode *mode,
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struct drm_display_mode *adjusted_mode)
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{
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}
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static void exynos_vidi_enable(struct drm_encoder *encoder)
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{
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}
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static void exynos_vidi_disable(struct drm_encoder *encoder)
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{
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}
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static const struct drm_encoder_helper_funcs exynos_vidi_encoder_helper_funcs = {
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.mode_set = exynos_vidi_mode_set,
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.enable = exynos_vidi_enable,
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.disable = exynos_vidi_disable,
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};
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static const struct drm_encoder_funcs exynos_vidi_encoder_funcs = {
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.destroy = drm_encoder_cleanup,
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};
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static int vidi_bind(struct device *dev, struct device *master, void *data)
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{
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struct vidi_context *ctx = dev_get_drvdata(dev);
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struct drm_device *drm_dev = data;
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struct drm_encoder *encoder = &ctx->encoder;
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struct exynos_drm_plane *exynos_plane;
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struct exynos_drm_plane_config plane_config = { 0 };
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unsigned int i;
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int ret;
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ctx->drm_dev = drm_dev;
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plane_config.pixel_formats = formats;
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plane_config.num_pixel_formats = ARRAY_SIZE(formats);
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for (i = 0; i < WINDOWS_NR; i++) {
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plane_config.zpos = i;
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plane_config.type = vidi_win_types[i];
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ret = exynos_plane_init(drm_dev, &ctx->planes[i], i,
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&plane_config);
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if (ret)
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return ret;
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}
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exynos_plane = &ctx->planes[DEFAULT_WIN];
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ctx->crtc = exynos_drm_crtc_create(drm_dev, &exynos_plane->base,
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EXYNOS_DISPLAY_TYPE_VIDI, &vidi_crtc_ops, ctx);
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if (IS_ERR(ctx->crtc)) {
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DRM_DEV_ERROR(dev, "failed to create crtc.\n");
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return PTR_ERR(ctx->crtc);
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}
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drm_encoder_init(drm_dev, encoder, &exynos_vidi_encoder_funcs,
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DRM_MODE_ENCODER_TMDS, NULL);
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drm_encoder_helper_add(encoder, &exynos_vidi_encoder_helper_funcs);
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ret = exynos_drm_set_possible_crtcs(encoder, EXYNOS_DISPLAY_TYPE_VIDI);
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if (ret < 0)
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return ret;
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ret = vidi_create_connector(encoder);
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if (ret) {
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DRM_DEV_ERROR(dev, "failed to create connector ret = %d\n",
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ret);
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drm_encoder_cleanup(encoder);
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return ret;
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}
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return 0;
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}
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static void vidi_unbind(struct device *dev, struct device *master, void *data)
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{
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struct vidi_context *ctx = dev_get_drvdata(dev);
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del_timer_sync(&ctx->timer);
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}
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static const struct component_ops vidi_component_ops = {
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.bind = vidi_bind,
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.unbind = vidi_unbind,
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};
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static int vidi_probe(struct platform_device *pdev)
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{
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struct vidi_context *ctx;
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struct device *dev = &pdev->dev;
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int ret;
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ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
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if (!ctx)
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return -ENOMEM;
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ctx->dev = dev;
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timer_setup(&ctx->timer, vidi_fake_vblank_timer, 0);
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mutex_init(&ctx->lock);
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platform_set_drvdata(pdev, ctx);
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ret = device_create_file(dev, &dev_attr_connection);
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if (ret < 0) {
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DRM_DEV_ERROR(dev,
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"failed to create connection sysfs.\n");
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return ret;
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}
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ret = component_add(dev, &vidi_component_ops);
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if (ret)
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goto err_remove_file;
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return ret;
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err_remove_file:
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device_remove_file(dev, &dev_attr_connection);
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return ret;
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}
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|
|
|
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);
|
|
|
|
return 0;
|
|
}
|
|
|
|
struct platform_driver vidi_driver = {
|
|
.probe = vidi_probe,
|
|
.remove = vidi_remove,
|
|
.driver = {
|
|
.name = "exynos-drm-vidi",
|
|
.owner = THIS_MODULE,
|
|
},
|
|
};
|