624 lines
15 KiB
C
624 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 <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_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 get_vidi_context(dev) platform_get_drvdata(to_platform_device(dev))
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struct vidi_win_data {
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unsigned int offset_x;
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unsigned int offset_y;
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unsigned int ovl_width;
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unsigned int ovl_height;
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unsigned int fb_width;
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unsigned int fb_height;
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unsigned int bpp;
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dma_addr_t dma_addr;
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unsigned int buf_offsize;
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unsigned int line_size; /* bytes */
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bool enabled;
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};
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struct vidi_context {
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struct exynos_drm_subdrv subdrv;
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struct drm_crtc *crtc;
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struct vidi_win_data win_data[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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};
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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 bool vidi_display_is_connected(struct device *dev)
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{
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struct vidi_context *ctx = get_vidi_context(dev);
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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 ? true : false;
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}
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static struct edid *vidi_get_edid(struct device *dev,
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struct drm_connector *connector)
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{
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struct vidi_context *ctx = get_vidi_context(dev);
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struct edid *edid;
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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 ERR_PTR(-EFAULT);
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}
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edid = drm_edid_duplicate(ctx->raw_edid);
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if (!edid) {
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DRM_DEBUG_KMS("failed to allocate edid\n");
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return ERR_PTR(-ENOMEM);
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}
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return edid;
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}
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static void *vidi_get_panel(struct device *dev)
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{
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/* TODO. */
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return NULL;
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}
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static int vidi_check_mode(struct device *dev, struct drm_display_mode *mode)
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{
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/* TODO. */
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return 0;
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}
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static int vidi_display_power_on(struct device *dev, int mode)
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{
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/* TODO */
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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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.type = EXYNOS_DISPLAY_TYPE_VIDI,
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.is_connected = vidi_display_is_connected,
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.get_edid = vidi_get_edid,
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.get_panel = vidi_get_panel,
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.check_mode = vidi_check_mode,
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.power_on = vidi_display_power_on,
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};
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static void vidi_dpms(struct device *subdrv_dev, int mode)
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{
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struct vidi_context *ctx = get_vidi_context(subdrv_dev);
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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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/* TODO. */
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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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/* TODO. */
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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 void vidi_apply(struct device *subdrv_dev)
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{
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struct vidi_context *ctx = get_vidi_context(subdrv_dev);
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struct exynos_drm_manager *mgr = ctx->subdrv.manager;
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struct exynos_drm_manager_ops *mgr_ops = mgr->ops;
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struct exynos_drm_overlay_ops *ovl_ops = mgr->overlay_ops;
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struct vidi_win_data *win_data;
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int i;
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for (i = 0; i < WINDOWS_NR; i++) {
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win_data = &ctx->win_data[i];
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if (win_data->enabled && (ovl_ops && ovl_ops->commit))
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ovl_ops->commit(subdrv_dev, i);
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}
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if (mgr_ops && mgr_ops->commit)
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mgr_ops->commit(subdrv_dev);
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}
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static void vidi_commit(struct device *dev)
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{
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struct vidi_context *ctx = get_vidi_context(dev);
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if (ctx->suspended)
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return;
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}
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static int vidi_enable_vblank(struct device *dev)
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{
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struct vidi_context *ctx = get_vidi_context(dev);
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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 overlay_ops->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 device *dev)
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{
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struct vidi_context *ctx = get_vidi_context(dev);
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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 struct exynos_drm_manager_ops vidi_manager_ops = {
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.dpms = vidi_dpms,
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.apply = vidi_apply,
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.commit = vidi_commit,
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.enable_vblank = vidi_enable_vblank,
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.disable_vblank = vidi_disable_vblank,
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};
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static void vidi_win_mode_set(struct device *dev,
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struct exynos_drm_overlay *overlay)
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{
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struct vidi_context *ctx = get_vidi_context(dev);
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struct vidi_win_data *win_data;
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int win;
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unsigned long offset;
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if (!overlay) {
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dev_err(dev, "overlay is NULL\n");
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return;
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}
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win = overlay->zpos;
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if (win == DEFAULT_ZPOS)
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win = ctx->default_win;
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if (win < 0 || win >= WINDOWS_NR)
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return;
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offset = overlay->fb_x * (overlay->bpp >> 3);
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offset += overlay->fb_y * overlay->pitch;
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DRM_DEBUG_KMS("offset = 0x%lx, pitch = %x\n", offset, overlay->pitch);
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win_data = &ctx->win_data[win];
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win_data->offset_x = overlay->crtc_x;
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win_data->offset_y = overlay->crtc_y;
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win_data->ovl_width = overlay->crtc_width;
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win_data->ovl_height = overlay->crtc_height;
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win_data->fb_width = overlay->fb_width;
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win_data->fb_height = overlay->fb_height;
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win_data->dma_addr = overlay->dma_addr[0] + offset;
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win_data->bpp = overlay->bpp;
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win_data->buf_offsize = (overlay->fb_width - overlay->crtc_width) *
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(overlay->bpp >> 3);
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win_data->line_size = overlay->crtc_width * (overlay->bpp >> 3);
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/*
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* some parts of win_data should be transferred to user side
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* through specific ioctl.
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*/
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DRM_DEBUG_KMS("offset_x = %d, offset_y = %d\n",
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win_data->offset_x, win_data->offset_y);
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DRM_DEBUG_KMS("ovl_width = %d, ovl_height = %d\n",
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win_data->ovl_width, win_data->ovl_height);
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DRM_DEBUG_KMS("paddr = 0x%lx\n", (unsigned long)win_data->dma_addr);
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DRM_DEBUG_KMS("fb_width = %d, crtc_width = %d\n",
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overlay->fb_width, overlay->crtc_width);
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}
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static void vidi_win_commit(struct device *dev, int zpos)
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{
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struct vidi_context *ctx = get_vidi_context(dev);
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struct vidi_win_data *win_data;
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int win = zpos;
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if (ctx->suspended)
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return;
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if (win == DEFAULT_ZPOS)
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win = ctx->default_win;
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if (win < 0 || win >= WINDOWS_NR)
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return;
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win_data = &ctx->win_data[win];
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win_data->enabled = true;
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DRM_DEBUG_KMS("dma_addr = 0x%x\n", win_data->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 device *dev, int zpos)
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{
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struct vidi_context *ctx = get_vidi_context(dev);
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struct vidi_win_data *win_data;
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int win = zpos;
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if (win == DEFAULT_ZPOS)
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win = ctx->default_win;
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if (win < 0 || win >= WINDOWS_NR)
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return;
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win_data = &ctx->win_data[win];
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win_data->enabled = false;
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/* TODO. */
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}
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static struct exynos_drm_overlay_ops vidi_overlay_ops = {
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.mode_set = vidi_win_mode_set,
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.commit = vidi_win_commit,
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.disable = vidi_win_disable,
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};
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static struct exynos_drm_manager vidi_manager = {
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.pipe = -1,
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.ops = &vidi_manager_ops,
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.overlay_ops = &vidi_overlay_ops,
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.display_ops = &vidi_display_ops,
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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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struct exynos_drm_subdrv *subdrv = &ctx->subdrv;
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struct exynos_drm_manager *manager = subdrv->manager;
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if (manager->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(subdrv->drm_dev, manager->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(subdrv->drm_dev, manager->pipe);
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}
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static int vidi_subdrv_probe(struct drm_device *drm_dev, struct device *dev)
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{
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/*
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* enable drm irq mode.
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* - with irq_enabled = true, we can use the vblank feature.
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*
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* P.S. note that we wouldn't use drm irq handler but
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* just specific driver own one instead because
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* drm framework supports only one irq handler.
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*/
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drm_dev->irq_enabled = true;
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/*
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* with vblank_disable_allowed = true, vblank interrupt will be disabled
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* by drm timer once a current process gives up ownership of
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* vblank event.(after drm_vblank_put function is called)
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*/
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drm_dev->vblank_disable_allowed = true;
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return 0;
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}
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static void vidi_subdrv_remove(struct drm_device *drm_dev, struct device *dev)
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{
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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_subdrv *subdrv = &ctx->subdrv;
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struct device *dev = subdrv->dev;
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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(dev);
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vidi_apply(dev);
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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 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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int rc;
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struct vidi_context *ctx = get_vidi_context(dev);
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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 = get_vidi_context(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->subdrv.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_manager *manager;
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struct exynos_drm_display_ops *display_ops;
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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) {
|
|
manager = exynos_drm_get_manager(encoder);
|
|
display_ops = manager->display_ops;
|
|
|
|
if (display_ops->type == EXYNOS_DISPLAY_TYPE_VIDI) {
|
|
ctx = get_vidi_context(manager->dev);
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!ctx) {
|
|
DRM_DEBUG_KMS("not found virtual device type encoder.\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (ctx->connected == vidi->connection) {
|
|
DRM_DEBUG_KMS("same connection request.\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (vidi->connection) {
|
|
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->subdrv.drm_dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int vidi_probe(struct platform_device *pdev)
|
|
{
|
|
struct device *dev = &pdev->dev;
|
|
struct vidi_context *ctx;
|
|
struct exynos_drm_subdrv *subdrv;
|
|
int ret;
|
|
|
|
ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
|
|
if (!ctx)
|
|
return -ENOMEM;
|
|
|
|
ctx->default_win = 0;
|
|
|
|
INIT_WORK(&ctx->work, vidi_fake_vblank_handler);
|
|
|
|
subdrv = &ctx->subdrv;
|
|
subdrv->dev = dev;
|
|
subdrv->manager = &vidi_manager;
|
|
subdrv->probe = vidi_subdrv_probe;
|
|
subdrv->remove = vidi_subdrv_remove;
|
|
|
|
mutex_init(&ctx->lock);
|
|
|
|
platform_set_drvdata(pdev, ctx);
|
|
|
|
ret = device_create_file(dev, &dev_attr_connection);
|
|
if (ret < 0)
|
|
DRM_INFO("failed to create connection sysfs.\n");
|
|
|
|
exynos_drm_subdrv_register(subdrv);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int vidi_remove(struct platform_device *pdev)
|
|
{
|
|
struct vidi_context *ctx = platform_get_drvdata(pdev);
|
|
|
|
exynos_drm_subdrv_unregister(&ctx->subdrv);
|
|
|
|
if (ctx->raw_edid != (struct edid *)fake_edid_info) {
|
|
kfree(ctx->raw_edid);
|
|
ctx->raw_edid = NULL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_PM_SLEEP
|
|
static int vidi_suspend(struct device *dev)
|
|
{
|
|
struct vidi_context *ctx = get_vidi_context(dev);
|
|
|
|
return vidi_power_on(ctx, false);
|
|
}
|
|
|
|
static int vidi_resume(struct device *dev)
|
|
{
|
|
struct vidi_context *ctx = get_vidi_context(dev);
|
|
|
|
return vidi_power_on(ctx, true);
|
|
}
|
|
#endif
|
|
|
|
static const struct dev_pm_ops vidi_pm_ops = {
|
|
SET_SYSTEM_SLEEP_PM_OPS(vidi_suspend, vidi_resume)
|
|
};
|
|
|
|
struct platform_driver vidi_driver = {
|
|
.probe = vidi_probe,
|
|
.remove = vidi_remove,
|
|
.driver = {
|
|
.name = "exynos-drm-vidi",
|
|
.owner = THIS_MODULE,
|
|
.pm = &vidi_pm_ops,
|
|
},
|
|
};
|