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- /*
- * i.MX IPUv3 DP Overlay Planes
- *
- * Copyright (C) 2013 Philipp Zabel, Pengutronix
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2
- * of the License, or (at your option) any later version.
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- */
- #include <drm/drmP.h>
- #include <drm/drm_fb_cma_helper.h>
- #include <drm/drm_gem_cma_helper.h>
- #include "video/imx-ipu-v3.h"
- #include "ipuv3-plane.h"
- #define to_ipu_plane(x) container_of(x, struct ipu_plane, base)
- static const uint32_t ipu_plane_formats[] = {
- DRM_FORMAT_ARGB1555,
- DRM_FORMAT_XRGB1555,
- DRM_FORMAT_ABGR1555,
- DRM_FORMAT_XBGR1555,
- DRM_FORMAT_RGBA5551,
- DRM_FORMAT_BGRA5551,
- DRM_FORMAT_ARGB4444,
- DRM_FORMAT_ARGB8888,
- DRM_FORMAT_XRGB8888,
- DRM_FORMAT_ABGR8888,
- DRM_FORMAT_XBGR8888,
- DRM_FORMAT_RGBA8888,
- DRM_FORMAT_RGBX8888,
- DRM_FORMAT_BGRA8888,
- DRM_FORMAT_BGRA8888,
- DRM_FORMAT_YUYV,
- DRM_FORMAT_YVYU,
- DRM_FORMAT_YUV420,
- DRM_FORMAT_YVU420,
- };
- int ipu_plane_irq(struct ipu_plane *ipu_plane)
- {
- return ipu_idmac_channel_irq(ipu_plane->ipu, ipu_plane->ipu_ch,
- IPU_IRQ_EOF);
- }
- static int calc_vref(struct drm_display_mode *mode)
- {
- unsigned long htotal, vtotal;
- htotal = mode->htotal;
- vtotal = mode->vtotal;
- if (!htotal || !vtotal)
- return 60;
- return DIV_ROUND_UP(mode->clock * 1000, vtotal * htotal);
- }
- static inline int calc_bandwidth(int width, int height, unsigned int vref)
- {
- return width * height * vref;
- }
- int ipu_plane_set_base(struct ipu_plane *ipu_plane, struct drm_framebuffer *fb,
- int x, int y)
- {
- struct drm_gem_cma_object *cma_obj;
- unsigned long eba;
- int active;
- cma_obj = drm_fb_cma_get_gem_obj(fb, 0);
- if (!cma_obj) {
- DRM_DEBUG_KMS("entry is null.\n");
- return -EFAULT;
- }
- dev_dbg(ipu_plane->base.dev->dev, "phys = %pad, x = %d, y = %d",
- &cma_obj->paddr, x, y);
- eba = cma_obj->paddr + fb->offsets[0] +
- fb->pitches[0] * y + (fb->bits_per_pixel >> 3) * x;
- if (ipu_plane->enabled) {
- active = ipu_idmac_get_current_buffer(ipu_plane->ipu_ch);
- ipu_cpmem_set_buffer(ipu_plane->ipu_ch, !active, eba);
- ipu_idmac_select_buffer(ipu_plane->ipu_ch, !active);
- } else {
- ipu_cpmem_set_buffer(ipu_plane->ipu_ch, 0, eba);
- ipu_cpmem_set_buffer(ipu_plane->ipu_ch, 1, eba);
- }
- /* cache offsets for subsequent pageflips */
- ipu_plane->x = x;
- ipu_plane->y = y;
- return 0;
- }
- int ipu_plane_mode_set(struct ipu_plane *ipu_plane, struct drm_crtc *crtc,
- struct drm_display_mode *mode,
- struct drm_framebuffer *fb, int crtc_x, int crtc_y,
- unsigned int crtc_w, unsigned int crtc_h,
- uint32_t src_x, uint32_t src_y,
- uint32_t src_w, uint32_t src_h, bool interlaced)
- {
- struct device *dev = ipu_plane->base.dev->dev;
- int ret;
- /* no scaling */
- if (src_w != crtc_w || src_h != crtc_h)
- return -EINVAL;
- /* clip to crtc bounds */
- if (crtc_x < 0) {
- if (-crtc_x > crtc_w)
- return -EINVAL;
- src_x += -crtc_x;
- src_w -= -crtc_x;
- crtc_w -= -crtc_x;
- crtc_x = 0;
- }
- if (crtc_y < 0) {
- if (-crtc_y > crtc_h)
- return -EINVAL;
- src_y += -crtc_y;
- src_h -= -crtc_y;
- crtc_h -= -crtc_y;
- crtc_y = 0;
- }
- if (crtc_x + crtc_w > mode->hdisplay) {
- if (crtc_x > mode->hdisplay)
- return -EINVAL;
- crtc_w = mode->hdisplay - crtc_x;
- src_w = crtc_w;
- }
- if (crtc_y + crtc_h > mode->vdisplay) {
- if (crtc_y > mode->vdisplay)
- return -EINVAL;
- crtc_h = mode->vdisplay - crtc_y;
- src_h = crtc_h;
- }
- /* full plane minimum width is 13 pixels */
- if (crtc_w < 13 && (ipu_plane->dp_flow != IPU_DP_FLOW_SYNC_FG))
- return -EINVAL;
- if (crtc_h < 2)
- return -EINVAL;
- /*
- * since we cannot touch active IDMAC channels, we do not support
- * resizing the enabled plane or changing its format
- */
- if (ipu_plane->enabled) {
- if (src_w != ipu_plane->w || src_h != ipu_plane->h ||
- fb->pixel_format != ipu_plane->base.fb->pixel_format)
- return -EINVAL;
- return ipu_plane_set_base(ipu_plane, fb, src_x, src_y);
- }
- switch (ipu_plane->dp_flow) {
- case IPU_DP_FLOW_SYNC_BG:
- ret = ipu_dp_setup_channel(ipu_plane->dp,
- IPUV3_COLORSPACE_RGB,
- IPUV3_COLORSPACE_RGB);
- if (ret) {
- dev_err(dev,
- "initializing display processor failed with %d\n",
- ret);
- return ret;
- }
- ipu_dp_set_global_alpha(ipu_plane->dp, true, 0, true);
- break;
- case IPU_DP_FLOW_SYNC_FG:
- ipu_dp_setup_channel(ipu_plane->dp,
- ipu_drm_fourcc_to_colorspace(fb->pixel_format),
- IPUV3_COLORSPACE_UNKNOWN);
- ipu_dp_set_window_pos(ipu_plane->dp, crtc_x, crtc_y);
- /* Enable local alpha on partial plane */
- switch (fb->pixel_format) {
- case DRM_FORMAT_ARGB1555:
- case DRM_FORMAT_ABGR1555:
- case DRM_FORMAT_RGBA5551:
- case DRM_FORMAT_BGRA5551:
- case DRM_FORMAT_ARGB4444:
- case DRM_FORMAT_ARGB8888:
- case DRM_FORMAT_ABGR8888:
- case DRM_FORMAT_RGBA8888:
- case DRM_FORMAT_BGRA8888:
- ipu_dp_set_global_alpha(ipu_plane->dp, false, 0, false);
- break;
- default:
- break;
- }
- }
- ret = ipu_dmfc_init_channel(ipu_plane->dmfc, crtc_w);
- if (ret) {
- dev_err(dev, "initializing dmfc channel failed with %d\n", ret);
- return ret;
- }
- ret = ipu_dmfc_alloc_bandwidth(ipu_plane->dmfc,
- calc_bandwidth(crtc_w, crtc_h,
- calc_vref(mode)), 64);
- if (ret) {
- dev_err(dev, "allocating dmfc bandwidth failed with %d\n", ret);
- return ret;
- }
- ipu_cpmem_zero(ipu_plane->ipu_ch);
- ipu_cpmem_set_resolution(ipu_plane->ipu_ch, src_w, src_h);
- ret = ipu_cpmem_set_fmt(ipu_plane->ipu_ch, fb->pixel_format);
- if (ret < 0) {
- dev_err(dev, "unsupported pixel format 0x%08x\n",
- fb->pixel_format);
- return ret;
- }
- ipu_cpmem_set_high_priority(ipu_plane->ipu_ch);
- ipu_idmac_set_double_buffer(ipu_plane->ipu_ch, 1);
- ipu_cpmem_set_stride(ipu_plane->ipu_ch, fb->pitches[0]);
- ret = ipu_plane_set_base(ipu_plane, fb, src_x, src_y);
- if (ret < 0)
- return ret;
- if (interlaced)
- ipu_cpmem_interlaced_scan(ipu_plane->ipu_ch, fb->pitches[0]);
- ipu_plane->w = src_w;
- ipu_plane->h = src_h;
- return 0;
- }
- void ipu_plane_put_resources(struct ipu_plane *ipu_plane)
- {
- if (!IS_ERR_OR_NULL(ipu_plane->dp))
- ipu_dp_put(ipu_plane->dp);
- if (!IS_ERR_OR_NULL(ipu_plane->dmfc))
- ipu_dmfc_put(ipu_plane->dmfc);
- if (!IS_ERR_OR_NULL(ipu_plane->ipu_ch))
- ipu_idmac_put(ipu_plane->ipu_ch);
- }
- int ipu_plane_get_resources(struct ipu_plane *ipu_plane)
- {
- int ret;
- ipu_plane->ipu_ch = ipu_idmac_get(ipu_plane->ipu, ipu_plane->dma);
- if (IS_ERR(ipu_plane->ipu_ch)) {
- ret = PTR_ERR(ipu_plane->ipu_ch);
- DRM_ERROR("failed to get idmac channel: %d\n", ret);
- return ret;
- }
- ipu_plane->dmfc = ipu_dmfc_get(ipu_plane->ipu, ipu_plane->dma);
- if (IS_ERR(ipu_plane->dmfc)) {
- ret = PTR_ERR(ipu_plane->dmfc);
- DRM_ERROR("failed to get dmfc: ret %d\n", ret);
- goto err_out;
- }
- if (ipu_plane->dp_flow >= 0) {
- ipu_plane->dp = ipu_dp_get(ipu_plane->ipu, ipu_plane->dp_flow);
- if (IS_ERR(ipu_plane->dp)) {
- ret = PTR_ERR(ipu_plane->dp);
- DRM_ERROR("failed to get dp flow: %d\n", ret);
- goto err_out;
- }
- }
- return 0;
- err_out:
- ipu_plane_put_resources(ipu_plane);
- return ret;
- }
- void ipu_plane_enable(struct ipu_plane *ipu_plane)
- {
- if (ipu_plane->dp)
- ipu_dp_enable(ipu_plane->ipu);
- ipu_dmfc_enable_channel(ipu_plane->dmfc);
- ipu_idmac_enable_channel(ipu_plane->ipu_ch);
- if (ipu_plane->dp)
- ipu_dp_enable_channel(ipu_plane->dp);
- ipu_plane->enabled = true;
- }
- void ipu_plane_disable(struct ipu_plane *ipu_plane)
- {
- ipu_plane->enabled = false;
- ipu_idmac_wait_busy(ipu_plane->ipu_ch, 50);
- if (ipu_plane->dp)
- ipu_dp_disable_channel(ipu_plane->dp);
- ipu_idmac_disable_channel(ipu_plane->ipu_ch);
- ipu_dmfc_disable_channel(ipu_plane->dmfc);
- if (ipu_plane->dp)
- ipu_dp_disable(ipu_plane->ipu);
- }
- /*
- * drm_plane API
- */
- static int ipu_update_plane(struct drm_plane *plane, struct drm_crtc *crtc,
- struct drm_framebuffer *fb, int crtc_x, int crtc_y,
- unsigned int crtc_w, unsigned int crtc_h,
- uint32_t src_x, uint32_t src_y,
- uint32_t src_w, uint32_t src_h)
- {
- struct ipu_plane *ipu_plane = to_ipu_plane(plane);
- int ret = 0;
- DRM_DEBUG_KMS("plane - %p\n", plane);
- if (!ipu_plane->enabled)
- ret = ipu_plane_get_resources(ipu_plane);
- if (ret < 0)
- return ret;
- ret = ipu_plane_mode_set(ipu_plane, crtc, &crtc->hwmode, fb,
- crtc_x, crtc_y, crtc_w, crtc_h,
- src_x >> 16, src_y >> 16, src_w >> 16, src_h >> 16,
- false);
- if (ret < 0) {
- ipu_plane_put_resources(ipu_plane);
- return ret;
- }
- if (crtc != plane->crtc)
- dev_info(plane->dev->dev, "crtc change: %p -> %p\n",
- plane->crtc, crtc);
- plane->crtc = crtc;
- if (!ipu_plane->enabled)
- ipu_plane_enable(ipu_plane);
- return 0;
- }
- static int ipu_disable_plane(struct drm_plane *plane)
- {
- struct ipu_plane *ipu_plane = to_ipu_plane(plane);
- DRM_DEBUG_KMS("[%d] %s\n", __LINE__, __func__);
- if (ipu_plane->enabled)
- ipu_plane_disable(ipu_plane);
- ipu_plane_put_resources(ipu_plane);
- return 0;
- }
- static void ipu_plane_destroy(struct drm_plane *plane)
- {
- struct ipu_plane *ipu_plane = to_ipu_plane(plane);
- DRM_DEBUG_KMS("[%d] %s\n", __LINE__, __func__);
- ipu_disable_plane(plane);
- drm_plane_cleanup(plane);
- kfree(ipu_plane);
- }
- static struct drm_plane_funcs ipu_plane_funcs = {
- .update_plane = ipu_update_plane,
- .disable_plane = ipu_disable_plane,
- .destroy = ipu_plane_destroy,
- };
- struct ipu_plane *ipu_plane_init(struct drm_device *dev, struct ipu_soc *ipu,
- int dma, int dp, unsigned int possible_crtcs,
- enum drm_plane_type type)
- {
- struct ipu_plane *ipu_plane;
- int ret;
- DRM_DEBUG_KMS("channel %d, dp flow %d, possible_crtcs=0x%x\n",
- dma, dp, possible_crtcs);
- ipu_plane = kzalloc(sizeof(*ipu_plane), GFP_KERNEL);
- if (!ipu_plane) {
- DRM_ERROR("failed to allocate plane\n");
- return ERR_PTR(-ENOMEM);
- }
- ipu_plane->ipu = ipu;
- ipu_plane->dma = dma;
- ipu_plane->dp_flow = dp;
- ret = drm_universal_plane_init(dev, &ipu_plane->base, possible_crtcs,
- &ipu_plane_funcs, ipu_plane_formats,
- ARRAY_SIZE(ipu_plane_formats), type);
- if (ret) {
- DRM_ERROR("failed to initialize plane\n");
- kfree(ipu_plane);
- return ERR_PTR(ret);
- }
- return ipu_plane;
- }
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