Commit d1667b86 authored by Rongrong Zou's avatar Rongrong Zou

drm/hisilicon/hibmc: Add support for frame buffer

Add support for fbdev and kms fb management.
Signed-off-by: default avatarRongrong Zou <zourongrong@gmail.com>
Reviewed-by: default avatarSean Paul <seanpaul@chromium.org>
Reviewed-by: default avatarXinliang Liu <xinliang.liu@linaro.org>
Acked-by: default avatarSean Paul <seanpaul@chromium.org>
parent e4daebc7
ccflags-y := -Iinclude/drm
hibmc-drm-y := hibmc_drm_drv.o hibmc_ttm.o
hibmc-drm-y := hibmc_drm_drv.o hibmc_drm_fbdev.o hibmc_ttm.o
obj-$(CONFIG_DRM_HISI_HIBMC) += hibmc-drm.o
......@@ -202,6 +202,7 @@ static int hibmc_unload(struct drm_device *dev)
{
struct hibmc_drm_private *priv = dev->dev_private;
hibmc_fbdev_fini(priv);
hibmc_mm_fini(priv);
dev->dev_private = NULL;
return 0;
......@@ -228,6 +229,12 @@ static int hibmc_load(struct drm_device *dev)
if (ret)
goto err;
ret = hibmc_fbdev_init(priv);
if (ret) {
DRM_ERROR("failed to initialize fbdev: %d\n", ret);
goto err;
}
return 0;
err:
......
......@@ -20,9 +20,21 @@
#define HIBMC_DRM_DRV_H
#include <drm/drmP.h>
#include <drm/drm_fb_helper.h>
#include <drm/drm_gem.h>
#include <drm/ttm/ttm_bo_driver.h>
struct hibmc_framebuffer {
struct drm_framebuffer fb;
struct drm_gem_object *obj;
};
struct hibmc_fbdev {
struct drm_fb_helper helper;
struct hibmc_framebuffer *fb;
int size;
};
struct hibmc_drm_private {
/* hw */
void __iomem *mmio;
......@@ -39,9 +51,13 @@ struct hibmc_drm_private {
struct ttm_bo_device bdev;
bool initialized;
/* fbdev */
struct hibmc_fbdev *fbdev;
bool mm_inited;
};
#define to_hibmc_framebuffer(x) container_of(x, struct hibmc_framebuffer, fb)
struct hibmc_bo {
struct ttm_buffer_object bo;
struct ttm_placement placement;
......@@ -66,8 +82,16 @@ void hibmc_set_power_mode(struct hibmc_drm_private *priv,
void hibmc_set_current_gate(struct hibmc_drm_private *priv,
unsigned int gate);
int hibmc_fbdev_init(struct hibmc_drm_private *priv);
void hibmc_fbdev_fini(struct hibmc_drm_private *priv);
int hibmc_gem_create(struct drm_device *dev, u32 size, bool iskernel,
struct drm_gem_object **obj);
struct hibmc_framebuffer *
hibmc_framebuffer_init(struct drm_device *dev,
const struct drm_mode_fb_cmd2 *mode_cmd,
struct drm_gem_object *obj);
int hibmc_mm_init(struct hibmc_drm_private *hibmc);
void hibmc_mm_fini(struct hibmc_drm_private *hibmc);
int hibmc_bo_pin(struct hibmc_bo *bo, u32 pl_flag, u64 *gpu_addr);
......
/* Hisilicon Hibmc SoC drm driver
*
* Based on the bochs drm driver.
*
* Copyright (c) 2016 Huawei Limited.
*
* Author:
* Rongrong Zou <zourongrong@huawei.com>
* Rongrong Zou <zourongrong@gmail.com>
* Jianhua Li <lijianhua@huawei.com>
*
* 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.
*
*/
#include <drm/drm_crtc.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_fb_helper.h>
#include "hibmc_drm_drv.h"
static int hibmcfb_create_object(
struct hibmc_drm_private *priv,
const struct drm_mode_fb_cmd2 *mode_cmd,
struct drm_gem_object **gobj_p)
{
struct drm_gem_object *gobj;
struct drm_device *dev = priv->dev;
u32 size;
int ret = 0;
size = mode_cmd->pitches[0] * mode_cmd->height;
ret = hibmc_gem_create(dev, size, true, &gobj);
if (ret)
return ret;
*gobj_p = gobj;
return ret;
}
static struct fb_ops hibmc_drm_fb_ops = {
.owner = THIS_MODULE,
.fb_check_var = drm_fb_helper_check_var,
.fb_set_par = drm_fb_helper_set_par,
.fb_fillrect = drm_fb_helper_sys_fillrect,
.fb_copyarea = drm_fb_helper_sys_copyarea,
.fb_imageblit = drm_fb_helper_sys_imageblit,
.fb_pan_display = drm_fb_helper_pan_display,
.fb_blank = drm_fb_helper_blank,
.fb_setcmap = drm_fb_helper_setcmap,
};
static int hibmc_drm_fb_create(struct drm_fb_helper *helper,
struct drm_fb_helper_surface_size *sizes)
{
struct hibmc_fbdev *hi_fbdev =
container_of(helper, struct hibmc_fbdev, helper);
struct hibmc_drm_private *priv = helper->dev->dev_private;
struct fb_info *info;
struct drm_mode_fb_cmd2 mode_cmd;
struct drm_gem_object *gobj = NULL;
int ret = 0;
int ret1;
size_t size;
unsigned int bytes_per_pixel;
struct hibmc_bo *bo = NULL;
DRM_DEBUG_DRIVER("surface width(%d), height(%d) and bpp(%d)\n",
sizes->surface_width, sizes->surface_height,
sizes->surface_bpp);
sizes->surface_depth = 32;
bytes_per_pixel = DIV_ROUND_UP(sizes->surface_bpp, 8);
mode_cmd.width = sizes->surface_width;
mode_cmd.height = sizes->surface_height;
mode_cmd.pitches[0] = mode_cmd.width * bytes_per_pixel;
mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
sizes->surface_depth);
size = PAGE_ALIGN(mode_cmd.pitches[0] * mode_cmd.height);
ret = hibmcfb_create_object(priv, &mode_cmd, &gobj);
if (ret) {
DRM_ERROR("failed to create fbcon backing object: %d\n", ret);
return -ENOMEM;
}
bo = gem_to_hibmc_bo(gobj);
ret = ttm_bo_reserve(&bo->bo, true, false, NULL);
if (ret) {
DRM_ERROR("failed to reserve ttm_bo: %d\n", ret);
goto out_unref_gem;
}
ret = hibmc_bo_pin(bo, TTM_PL_FLAG_VRAM, NULL);
if (ret) {
DRM_ERROR("failed to pin fbcon: %d\n", ret);
goto out_unreserve_ttm_bo;
}
ret = ttm_bo_kmap(&bo->bo, 0, bo->bo.num_pages, &bo->kmap);
if (ret) {
DRM_ERROR("failed to kmap fbcon: %d\n", ret);
goto out_unpin_bo;
}
ttm_bo_unreserve(&bo->bo);
info = drm_fb_helper_alloc_fbi(helper);
if (IS_ERR(info)) {
ret = PTR_ERR(info);
DRM_ERROR("failed to allocate fbi: %d\n", ret);
goto out_release_fbi;
}
info->par = hi_fbdev;
hi_fbdev->fb = hibmc_framebuffer_init(priv->dev, &mode_cmd, gobj);
if (IS_ERR(hi_fbdev->fb)) {
ret = PTR_ERR(info);
DRM_ERROR("failed to initialize framebuffer: %d\n", ret);
goto out_release_fbi;
}
priv->fbdev->size = size;
hi_fbdev->helper.fb = &hi_fbdev->fb->fb;
strcpy(info->fix.id, "hibmcdrmfb");
info->flags = FBINFO_DEFAULT;
info->fbops = &hibmc_drm_fb_ops;
drm_fb_helper_fill_fix(info, hi_fbdev->fb->fb.pitches[0],
hi_fbdev->fb->fb.depth);
drm_fb_helper_fill_var(info, &priv->fbdev->helper, sizes->fb_width,
sizes->fb_height);
info->screen_base = bo->kmap.virtual;
info->screen_size = size;
info->fix.smem_start = bo->bo.mem.bus.offset + bo->bo.mem.bus.base;
info->fix.smem_len = size;
return 0;
out_release_fbi:
drm_fb_helper_release_fbi(helper);
ret1 = ttm_bo_reserve(&bo->bo, true, false, NULL);
if (ret1) {
DRM_ERROR("failed to rsv ttm_bo when release fbi: %d\n", ret1);
goto out_unref_gem;
}
ttm_bo_kunmap(&bo->kmap);
out_unpin_bo:
hibmc_bo_unpin(bo);
out_unreserve_ttm_bo:
ttm_bo_unreserve(&bo->bo);
out_unref_gem:
drm_gem_object_unreference_unlocked(gobj);
return ret;
}
static void hibmc_fbdev_destroy(struct hibmc_fbdev *fbdev)
{
struct hibmc_framebuffer *gfb = fbdev->fb;
struct drm_fb_helper *fbh = &fbdev->helper;
drm_fb_helper_unregister_fbi(fbh);
drm_fb_helper_release_fbi(fbh);
drm_fb_helper_fini(fbh);
if (gfb)
drm_framebuffer_unreference(&gfb->fb);
}
static const struct drm_fb_helper_funcs hibmc_fbdev_helper_funcs = {
.fb_probe = hibmc_drm_fb_create,
};
int hibmc_fbdev_init(struct hibmc_drm_private *priv)
{
int ret;
struct fb_var_screeninfo *var;
struct fb_fix_screeninfo *fix;
struct hibmc_fbdev *hifbdev;
hifbdev = devm_kzalloc(priv->dev->dev, sizeof(*hifbdev), GFP_KERNEL);
if (!hifbdev) {
DRM_ERROR("failed to allocate hibmc_fbdev\n");
return -ENOMEM;
}
priv->fbdev = hifbdev;
drm_fb_helper_prepare(priv->dev, &hifbdev->helper,
&hibmc_fbdev_helper_funcs);
/* Now just one crtc and one channel */
ret = drm_fb_helper_init(priv->dev,
&hifbdev->helper, 1, 1);
if (ret) {
DRM_ERROR("failed to initialize fb helper: %d\n", ret);
return ret;
}
ret = drm_fb_helper_single_add_all_connectors(&hifbdev->helper);
if (ret) {
DRM_ERROR("failed to add all connectors: %d\n", ret);
goto fini;
}
ret = drm_fb_helper_initial_config(&hifbdev->helper, 16);
if (ret) {
DRM_ERROR("failed to setup initial conn config: %d\n", ret);
goto fini;
}
var = &hifbdev->helper.fbdev->var;
fix = &hifbdev->helper.fbdev->fix;
DRM_DEBUG_DRIVER("Member of info->var is :\n"
"xres=%d\n"
"yres=%d\n"
"xres_virtual=%d\n"
"yres_virtual=%d\n"
"xoffset=%d\n"
"yoffset=%d\n"
"bits_per_pixel=%d\n"
"...\n", var->xres, var->yres, var->xres_virtual,
var->yres_virtual, var->xoffset, var->yoffset,
var->bits_per_pixel);
DRM_DEBUG_DRIVER("Member of info->fix is :\n"
"smem_start=%lx\n"
"smem_len=%d\n"
"type=%d\n"
"type_aux=%d\n"
"visual=%d\n"
"xpanstep=%d\n"
"ypanstep=%d\n"
"ywrapstep=%d\n"
"line_length=%d\n"
"accel=%d\n"
"capabilities=%d\n"
"...\n", fix->smem_start, fix->smem_len, fix->type,
fix->type_aux, fix->visual, fix->xpanstep,
fix->ypanstep, fix->ywrapstep, fix->line_length,
fix->accel, fix->capabilities);
return 0;
fini:
drm_fb_helper_fini(&hifbdev->helper);
return ret;
}
void hibmc_fbdev_fini(struct hibmc_drm_private *priv)
{
if (!priv->fbdev)
return;
hibmc_fbdev_destroy(priv->fbdev);
priv->fbdev = NULL;
}
......@@ -16,6 +16,7 @@
*
*/
#include <drm/drm_atomic_helper.h>
#include <ttm/ttm_page_alloc.h>
#include "hibmc_drm_drv.h"
......@@ -483,3 +484,69 @@ int hibmc_dumb_mmap_offset(struct drm_file *file, struct drm_device *dev,
drm_gem_object_unreference_unlocked(obj);
return 0;
}
static void hibmc_user_framebuffer_destroy(struct drm_framebuffer *fb)
{
struct hibmc_framebuffer *hibmc_fb = to_hibmc_framebuffer(fb);
drm_gem_object_unreference_unlocked(hibmc_fb->obj);
drm_framebuffer_cleanup(fb);
kfree(hibmc_fb);
}
static const struct drm_framebuffer_funcs hibmc_fb_funcs = {
.destroy = hibmc_user_framebuffer_destroy,
};
struct hibmc_framebuffer *
hibmc_framebuffer_init(struct drm_device *dev,
const struct drm_mode_fb_cmd2 *mode_cmd,
struct drm_gem_object *obj)
{
struct hibmc_framebuffer *hibmc_fb;
int ret;
hibmc_fb = kzalloc(sizeof(*hibmc_fb), GFP_KERNEL);
if (!hibmc_fb) {
DRM_ERROR("failed to allocate hibmc_fb\n");
return ERR_PTR(-ENOMEM);
}
drm_helper_mode_fill_fb_struct(&hibmc_fb->fb, mode_cmd);
hibmc_fb->obj = obj;
ret = drm_framebuffer_init(dev, &hibmc_fb->fb, &hibmc_fb_funcs);
if (ret) {
DRM_ERROR("drm_framebuffer_init failed: %d\n", ret);
kfree(hibmc_fb);
return ERR_PTR(ret);
}
return hibmc_fb;
}
static struct drm_framebuffer *
hibmc_user_framebuffer_create(struct drm_device *dev,
struct drm_file *filp,
const struct drm_mode_fb_cmd2 *mode_cmd)
{
struct drm_gem_object *obj;
struct hibmc_framebuffer *hibmc_fb;
DRM_DEBUG_DRIVER("%dx%d, format %c%c%c%c\n",
mode_cmd->width, mode_cmd->height,
(mode_cmd->pixel_format) & 0xff,
(mode_cmd->pixel_format >> 8) & 0xff,
(mode_cmd->pixel_format >> 16) & 0xff,
(mode_cmd->pixel_format >> 24) & 0xff);
obj = drm_gem_object_lookup(filp, mode_cmd->handles[0]);
if (!obj)
return ERR_PTR(-ENOENT);
hibmc_fb = hibmc_framebuffer_init(dev, mode_cmd, obj);
if (IS_ERR(hibmc_fb)) {
drm_gem_object_unreference_unlocked(obj);
return ERR_PTR((long)hibmc_fb);
}
return &hibmc_fb->fb;
}
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