622 lines
15 KiB
C
622 lines
15 KiB
C
/* 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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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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*/
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#include <drm/drmP.h>
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#include <linux/kernel.h>
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#include <linux/platform_device.h>
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#include <linux/component.h>
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#include <drm/exynos_drm.h>
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#include <drm/drm_edid.h>
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#include <drm/drm_crtc_helper.h>
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#include "exynos_drm_drv.h"
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#include "exynos_drm_crtc.h"
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#include "exynos_drm_plane.h"
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#include "exynos_drm_encoder.h"
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#include "exynos_drm_vidi.h"
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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 exynos_drm_display display;
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struct platform_device *pdev;
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struct drm_device *drm_dev;
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struct exynos_drm_crtc *crtc;
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struct drm_encoder *encoder;
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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 default_win;
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unsigned long irq_flags;
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unsigned int connected;
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bool vblank_on;
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bool suspended;
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bool direct_vblank;
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struct work_struct work;
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struct mutex lock;
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int pipe;
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};
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static inline struct vidi_context *display_to_vidi(struct exynos_drm_display *d)
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{
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return container_of(d, struct vidi_context, display);
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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 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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if (!test_and_set_bit(0, &ctx->irq_flags))
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ctx->vblank_on = true;
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ctx->direct_vblank = true;
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/*
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* in case of page flip request, vidi_finish_pageflip function
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* will not be called because direct_vblank is true and then
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* that function will be called by crtc_ops->win_commit callback
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*/
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schedule_work(&ctx->work);
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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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struct vidi_context *ctx = crtc->ctx;
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if (ctx->suspended)
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return;
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if (test_and_clear_bit(0, &ctx->irq_flags))
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ctx->vblank_on = false;
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}
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static void vidi_win_commit(struct exynos_drm_crtc *crtc, unsigned int win)
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{
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struct vidi_context *ctx = crtc->ctx;
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struct exynos_drm_plane *plane;
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if (ctx->suspended)
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return;
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if (win < 0 || win >= WINDOWS_NR)
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return;
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plane = &ctx->planes[win];
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plane->enabled = true;
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DRM_DEBUG_KMS("dma_addr = %pad\n", plane->dma_addr);
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if (ctx->vblank_on)
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schedule_work(&ctx->work);
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}
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static void vidi_win_disable(struct exynos_drm_crtc *crtc, unsigned int win)
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{
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struct vidi_context *ctx = crtc->ctx;
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struct exynos_drm_plane *plane;
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if (win < 0 || win >= WINDOWS_NR)
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return;
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plane = &ctx->planes[win];
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plane->enabled = false;
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/* TODO. */
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}
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static int vidi_power_on(struct vidi_context *ctx, bool enable)
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{
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struct exynos_drm_plane *plane;
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int i;
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DRM_DEBUG_KMS("%s\n", __FILE__);
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if (enable != false && enable != true)
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return -EINVAL;
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if (enable) {
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ctx->suspended = false;
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/* if vblank was enabled status, enable it again. */
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if (test_and_clear_bit(0, &ctx->irq_flags))
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vidi_enable_vblank(ctx->crtc);
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for (i = 0; i < WINDOWS_NR; i++) {
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plane = &ctx->planes[i];
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if (plane->enabled)
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vidi_win_commit(ctx->crtc, i);
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}
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} else {
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ctx->suspended = true;
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}
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return 0;
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}
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static void vidi_dpms(struct exynos_drm_crtc *crtc, int mode)
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{
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struct vidi_context *ctx = crtc->ctx;
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DRM_DEBUG_KMS("%d\n", mode);
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mutex_lock(&ctx->lock);
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switch (mode) {
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case DRM_MODE_DPMS_ON:
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vidi_power_on(ctx, true);
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break;
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case DRM_MODE_DPMS_STANDBY:
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case DRM_MODE_DPMS_SUSPEND:
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case DRM_MODE_DPMS_OFF:
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vidi_power_on(ctx, false);
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break;
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default:
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DRM_DEBUG_KMS("unspecified mode %d\n", mode);
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break;
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}
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mutex_unlock(&ctx->lock);
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}
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static int vidi_ctx_initialize(struct vidi_context *ctx,
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struct drm_device *drm_dev)
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{
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struct exynos_drm_private *priv = drm_dev->dev_private;
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ctx->drm_dev = drm_dev;
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ctx->pipe = priv->pipe++;
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return 0;
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}
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static struct exynos_drm_crtc_ops vidi_crtc_ops = {
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.dpms = vidi_dpms,
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.enable_vblank = vidi_enable_vblank,
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.disable_vblank = vidi_disable_vblank,
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.win_commit = vidi_win_commit,
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.win_disable = vidi_win_disable,
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};
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static void vidi_fake_vblank_handler(struct work_struct *work)
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{
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struct vidi_context *ctx = container_of(work, struct vidi_context,
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work);
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if (ctx->pipe < 0)
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return;
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/* refresh rate is about 50Hz. */
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usleep_range(16000, 20000);
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mutex_lock(&ctx->lock);
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if (ctx->direct_vblank) {
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drm_handle_vblank(ctx->drm_dev, ctx->pipe);
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ctx->direct_vblank = false;
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mutex_unlock(&ctx->lock);
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return;
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}
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mutex_unlock(&ctx->lock);
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exynos_drm_crtc_finish_pageflip(ctx->drm_dev, ctx->pipe);
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}
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static int 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 int 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_DEBUG_KMS("edid data is not fake data.\n");
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return -EINVAL;
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}
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DRM_DEBUG_KMS("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 = NULL;
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struct drm_encoder *encoder;
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struct exynos_drm_display *display;
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struct drm_exynos_vidi_connection *vidi = data;
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if (!vidi) {
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DRM_DEBUG_KMS("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_DEBUG_KMS("connection should be 0 or 1.\n");
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return -EINVAL;
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}
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list_for_each_entry(encoder, &drm_dev->mode_config.encoder_list,
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head) {
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display = exynos_drm_get_display(encoder);
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if (display->type == EXYNOS_DISPLAY_TYPE_VIDI) {
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ctx = display_to_vidi(display);
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break;
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}
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}
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if (!ctx) {
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DRM_DEBUG_KMS("not found virtual device type encoder.\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_DEBUG_KMS("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 = (struct edid *)(uint32_t)vidi->edid;
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if (!drm_edid_is_valid(raw_edid)) {
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DRM_DEBUG_KMS("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_DEBUG_KMS("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 struct drm_connector_funcs vidi_connector_funcs = {
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.dpms = drm_helper_connector_dpms,
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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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};
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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_DEBUG_KMS("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_DEBUG_KMS("failed to allocate edid\n");
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return -ENOMEM;
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}
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drm_mode_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 struct drm_encoder *vidi_best_encoder(struct drm_connector *connector)
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{
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struct vidi_context *ctx = ctx_from_connector(connector);
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return ctx->encoder;
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}
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static struct drm_connector_helper_funcs vidi_connector_helper_funcs = {
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.get_modes = vidi_get_modes,
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.best_encoder = vidi_best_encoder,
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};
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static int vidi_create_connector(struct exynos_drm_display *display,
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struct drm_encoder *encoder)
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{
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struct vidi_context *ctx = display_to_vidi(display);
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struct drm_connector *connector = &ctx->connector;
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int ret;
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ctx->encoder = encoder;
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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_ERROR("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_register(connector);
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drm_mode_connector_attach_encoder(connector, encoder);
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return 0;
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}
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static struct exynos_drm_display_ops vidi_display_ops = {
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.create_connector = vidi_create_connector,
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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 exynos_drm_plane *exynos_plane;
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enum drm_plane_type type;
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unsigned int zpos;
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int ret;
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vidi_ctx_initialize(ctx, drm_dev);
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for (zpos = 0; zpos < WINDOWS_NR; zpos++) {
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type = (zpos == ctx->default_win) ? DRM_PLANE_TYPE_PRIMARY :
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DRM_PLANE_TYPE_OVERLAY;
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ret = exynos_plane_init(drm_dev, &ctx->planes[zpos],
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1 << ctx->pipe, type, zpos);
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if (ret)
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return ret;
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}
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exynos_plane = &ctx->planes[ctx->default_win];
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ctx->crtc = exynos_drm_crtc_create(drm_dev, &exynos_plane->base,
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ctx->pipe, EXYNOS_DISPLAY_TYPE_VIDI,
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&vidi_crtc_ops, ctx);
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if (IS_ERR(ctx->crtc)) {
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DRM_ERROR("failed to create crtc.\n");
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return PTR_ERR(ctx->crtc);
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}
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|
|
|
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);
|
|
}
|