[PATCH v6 3/9] drm/hisilicon/hibmc: Add support for frame buffer
Sean Paul
seanpaul at chromium.org
Fri Nov 11 05:27:18 PST 2016
On Fri, Nov 11, 2016 at 8:16 AM, Rongrong Zou <zourongrong at huawei.com> wrote:
> 在 2016/11/11 2:30, Sean Paul 写道:
>>
>> On Fri, Oct 28, 2016 at 3:27 AM, Rongrong Zou <zourongrong at gmail.com>
>> wrote:
>>>
>>> Add support for fbdev and kms fb management.
>>>
>>> Signed-off-by: Rongrong Zou <zourongrong at gmail.com>
>>> ---
>>> drivers/gpu/drm/hisilicon/hibmc/Makefile | 2 +-
>>> drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c | 17 ++
>>> drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.h | 24 ++
>>> drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_fbdev.c | 255
>>> ++++++++++++++++++++++
>>> drivers/gpu/drm/hisilicon/hibmc/hibmc_ttm.c | 66 ++++++
>>> 5 files changed, 363 insertions(+), 1 deletion(-)
>>> create mode 100644 drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_fbdev.c
>>>
>>> diff --git a/drivers/gpu/drm/hisilicon/hibmc/Makefile
>>> b/drivers/gpu/drm/hisilicon/hibmc/Makefile
>>> index d5c40b8..810a37e 100644
>>> --- a/drivers/gpu/drm/hisilicon/hibmc/Makefile
>>> +++ b/drivers/gpu/drm/hisilicon/hibmc/Makefile
>>> @@ -1,5 +1,5 @@
>>> ccflags-y := -Iinclude/drm
>>> -hibmc-drm-y := hibmc_drm_drv.o hibmc_drm_power.o hibmc_ttm.o
>>> +hibmc-drm-y := hibmc_drm_drv.o hibmc_drm_fbdev.o hibmc_drm_power.o
>>> hibmc_ttm.o
>>>
>>> obj-$(CONFIG_DRM_HISI_HIBMC) +=hibmc-drm.o
>>> #obj-y += hibmc-drm.o
>>> diff --git a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c
>>> b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c
>>> index 81f4301..5ac7a7e 100644
>>> --- a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c
>>> +++ b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c
>>> @@ -66,11 +66,23 @@ static void hibmc_disable_vblank(struct drm_device
>>> *dev, unsigned int pipe)
>>>
>>> static int hibmc_pm_suspend(struct device *dev)
>>> {
>>> + struct pci_dev *pdev = to_pci_dev(dev);
>>> + struct drm_device *drm_dev = pci_get_drvdata(pdev);
>>> + struct hibmc_drm_device *hidev = drm_dev->dev_private;
>>> +
>>> + drm_fb_helper_set_suspend_unlocked(&hidev->fbdev->helper, 1);
>>> +
>>
>>
>> We have atomic helpers for suspend/resume now. Please use those.
>
>
> drm_atomic_helper_suspend/resume()?
>
Correct
>
>>
>>> return 0;
>>> }
>>>
>>> static int hibmc_pm_resume(struct device *dev)
>>> {
>>> + struct pci_dev *pdev = to_pci_dev(dev);
>>> + struct drm_device *drm_dev = pci_get_drvdata(pdev);
>>> + struct hibmc_drm_device *hidev = drm_dev->dev_private;
>>> +
>>> + drm_fb_helper_set_suspend_unlocked(&hidev->fbdev->helper, 0);
>>> +
>>> return 0;
>>> }
>>>
>>> @@ -170,6 +182,7 @@ static int hibmc_unload(struct drm_device *dev)
>>> {
>>> struct hibmc_drm_device *hidev = dev->dev_private;
>>>
>>> + hibmc_fbdev_fini(hidev);
>>> hibmc_mm_fini(hidev);
>>> hibmc_hw_fini(hidev);
>>> dev->dev_private = NULL;
>>> @@ -195,6 +208,10 @@ static int hibmc_load(struct drm_device *dev,
>>> unsigned long flags)
>>> if (ret)
>>> goto err;
>>>
>>> + ret = hibmc_fbdev_init(hidev);
>>> + if (ret)
>>> + goto err;
>>> +
>>> return 0;
>>>
>>> err:
>>> diff --git a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.h
>>> b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.h
>>> index db8d80e..a40e9a7 100644
>>> --- a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.h
>>> +++ b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.h
>>> @@ -20,9 +20,22 @@
>>> #define HIBMC_DRM_DRV_H
>>>
>>> #include <drm/drmP.h>
>>> +#include <drm/drm_fb_helper.h>
>>> #include <drm/ttm/ttm_bo_driver.h>
>>> #include <drm/drm_gem.h>
>>>
>>> +struct hibmc_framebuffer {
>>> + struct drm_framebuffer fb;
>>> + struct drm_gem_object *obj;
>>> + bool is_fbdev_fb;
>>> +};
>>> +
>>> +struct hibmc_fbdev {
>>> + struct drm_fb_helper helper;
>>> + struct hibmc_framebuffer *fb;
>>> + int size;
>>> +};
>>> +
>>> struct hibmc_drm_device {
>>> /* hw */
>>> void __iomem *mmio;
>>> @@ -41,9 +54,13 @@ struct hibmc_drm_device {
>>> bool initialized;
>>> } ttm;
>>>
>>> + /* 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;
>>> @@ -65,8 +82,15 @@ static inline struct hibmc_bo *gem_to_hibmc_bo(struct
>>> drm_gem_object *gem)
>>>
>>> #define DRM_FILE_PAGE_OFFSET (0x100000000ULL >> PAGE_SHIFT)
>>>
>>> +int hibmc_fbdev_init(struct hibmc_drm_device *hidev);
>>> +void hibmc_fbdev_fini(struct hibmc_drm_device *hidev);
>>> +
>>> 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_device *hibmc);
>>> void hibmc_mm_fini(struct hibmc_drm_device *hibmc);
>>> diff --git a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_fbdev.c
>>> b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_fbdev.c
>>> new file mode 100644
>>> index 0000000..630124b
>>> --- /dev/null
>>> +++ b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_fbdev.c
>>> @@ -0,0 +1,255 @@
>>> +/* Hisilicon Hibmc SoC drm driver
>>> + *
>>> + * Based on the bochs drm driver.
>>> + *
>>> + * Copyright (c) 2016 Huawei Limited.
>>> + *
>>> + * Author:
>>> + * Rongrong Zou <zourongrong at huawei.com>
>>> + * Rongrong Zou <zourongrong at gmail.com>
>>> + * Jianhua Li <lijianhua at 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"
>>> +
>>> +/*
>>> ---------------------------------------------------------------------- */
>>
>>
>> Please remove
>
>
> will do that, thanks.
>
>
>>
>>> +
>>> +static int hibmcfb_create_object(
>>> + struct hibmc_drm_device *hidev,
>>> + const struct drm_mode_fb_cmd2 *mode_cmd,
>>> + struct drm_gem_object **gobj_p)
>>> +{
>>> + struct drm_gem_object *gobj;
>>> + struct drm_device *dev = hidev->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_device *hidev =
>>> + (struct hibmc_drm_device *)helper->dev->dev_private;
>>> + struct fb_info *info;
>>> + struct hibmc_framebuffer *hibmc_fb;
>>> + struct drm_framebuffer *fb;
>>> + struct drm_mode_fb_cmd2 mode_cmd;
>>> + struct drm_gem_object *gobj = NULL;
>>> + int ret = 0;
>>> + 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 = roundup(mode_cmd.pitches[0] * mode_cmd.height, PAGE_SIZE);
>>
>>
>> It's somewhat curious that you used ALIGN in the previous patch and
>> roundup here. But anyways, I think PAGE_ALIGN would be the most
>> appropriate thing to do here.
>
>
> agreed, thanks.
>
>>
>>> +
>>> + ret = hibmcfb_create_object(hidev, &mode_cmd, &gobj);
>>> + if (ret) {
>>> + DRM_ERROR("failed to create fbcon backing object %d\r\n",
>>
>> ret);
>>
>> \r, yikes!!!
>
>
> will delete it, thanks.
>
>>
>>> + return -ENOMEM;
>>> + }
>>> +
>>> + bo = gem_to_hibmc_bo(gobj);
>>> +
>>> + ret = ttm_bo_reserve(&bo->bo, true, false, NULL);
>>> + if (ret)
>>
>>
>> Print error here?
>
>
> will do.
>
>>
>> How about cleaning up gobj?
>
>
> you are right,
>
>>
>>> + return ret;
>>> +
>>> + ret = hibmc_bo_pin(bo, TTM_PL_FLAG_VRAM, NULL);
>>> + if (ret) {
>>> + DRM_ERROR("failed to pin fbcon\n");
>>
>>
>> Print ret
>>
>> ttm_bo_unreserve? It seems like you're missing clean-up in all of the
>> error paths in this function. Can you please make sure everything is
>> tidied up?
>
>
> ok, thanks.
>
>>
>>> + return ret;
>>> + }
>>> +
>>> + ret = ttm_bo_kmap(&bo->bo, 0, bo->bo.num_pages, &bo->kmap);
>>> +
>>
>>
>> nit: extra space
>
>
> do you mean extra line?
>
yes, apologies.
>>
>>> + if (ret) {
>>> + DRM_ERROR("failed to kmap fbcon\n");
>>
>>
>> Print ret
>
>
> ok, thanks.
>
>>
>>> + ttm_bo_unreserve(&bo->bo);
>>> + return ret;
>>> + }
>>> +
>>> + ttm_bo_unreserve(&bo->bo);
>>
>>
>> Move this between ttm_bo_kmap and if (ret), then remove it from inside
>> the conditional.
>
>
> This is fine with me, thanks.
>
>>
>>> +
>>> + info = drm_fb_helper_alloc_fbi(helper);
>>> + if (IS_ERR(info))
>>
>>
>> Print error
>
>
> ok, thanks.
>
>>
>>> + return PTR_ERR(info);
>>> +
>>> + info->par = hi_fbdev;
>>> +
>>> + hibmc_fb = hibmc_framebuffer_init(hidev->dev, &mode_cmd, gobj);
>>> + if (IS_ERR(hibmc_fb)) {
>>> + drm_fb_helper_release_fbi(helper);
>>> + return PTR_ERR(hibmc_fb);
>>> + }
>>> +
>>> + hi_fbdev->fb = hibmc_fb;
>>> + hidev->fbdev->size = size;
>>> + fb = &hibmc_fb->fb;
>>
>>
>> The fb variable isn't necessary, and really, the hibmc_fb doesn't
>> really help either, it just masks what's actually happening IMO.
>
>
> i will clean the two variables.
>
>
>>
>>> + if (!fb) {
>>> + DRM_INFO("fb is NULL\n");
>>> + return -EINVAL;
>>> + }
>>> +
>>> + hi_fbdev->helper.fb = fb;
>>> +
>>> + strcpy(info->fix.id, "hibmcdrmfb");
>>> +
>>> + info->flags = FBINFO_DEFAULT;
>>> + info->fbops = &hibmc_drm_fb_ops;
>>> +
>>> + drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
>>> + drm_fb_helper_fill_var(info, &hidev->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;
>>> +}
>>> +
>>> +static void hibmc_fbdev_destroy(struct hibmc_fbdev *fbdev)
>>> +{
>>> + struct hibmc_framebuffer *gfb = fbdev->fb;
>>> + struct drm_fb_helper *fbh = &fbdev->helper;
>>> +
>>> + DRM_DEBUG_DRIVER("hibmc_fbdev_destroy\n");
>>
>>
>> Not useful
>
>
> ok, will remove.
>
>
>>
>>> +
>>> + drm_fb_helper_unregister_fbi(fbh);
>>> + drm_fb_helper_release_fbi(fbh);
>>> +
>>> + drm_fb_helper_fini(fbh);
>>> +
>>> + if (gfb)
>>> + drm_framebuffer_unreference(&gfb->fb);
>>> +
>>> + kfree(fbdev);
>>> +}
>>> +
>>> +static const struct drm_fb_helper_funcs hibmc_fbdev_helper_funcs = {
>>> + .fb_probe = hibmc_drm_fb_create,
>>> +};
>>> +
>>> +int hibmc_fbdev_init(struct hibmc_drm_device *hidev)
>>> +{
>>> + int ret;
>>> + struct fb_var_screeninfo *var;
>>> + struct fb_fix_screeninfo *fix;
>>> + struct hibmc_fbdev *hifbdev;
>>> +
>>> + hifbdev = kzalloc(sizeof(*hifbdev), GFP_KERNEL);
>>
>>
>> devm_kzalloc?
>
>
> sounds good, so there need no kfree at hibmc_fbdev_destroy(),
> thanks.
>
yep, exactly
>>
>>> + if (!hifbdev)
>>> + return -ENOMEM;
>>> +
>>> + hidev->fbdev = hifbdev;
>>> + drm_fb_helper_prepare(hidev->dev, &hifbdev->helper,
>>> + &hibmc_fbdev_helper_funcs);
>>> +
>>> + /* Now just one crtc and one channel */
>>> + ret = drm_fb_helper_init(hidev->dev,
>>> + &hifbdev->helper, 1, 1);
>>> +
>>
>>
>> nit: extra line
>
>
> ok, thanks.
>
>
>>
>>> + if (ret)
>>> + return ret;
>>> +
>>> + ret = drm_fb_helper_single_add_all_connectors(&hifbdev->helper);
>>> + if (ret)
>>> + goto fini;
>>> +
>>> + ret = drm_fb_helper_initial_config(&hifbdev->helper, 16);
>>> + if (ret)
>>> + goto fini;
>>> +
>>> + var = &hifbdev->helper.fbdev->var;
>>> + fix = &hifbdev->helper.fbdev->fix;
>>> +
>>> + DRM_DEBUG("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("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);
>>
>>
>> You've been using DRM_DEBUG_DRIVER elsewhere, you should probably use
>> it here, too.
>
>
> ok, thanks.
>
>
>>
>>> +
>>> + return 0;
>>> +
>>> +fini:
>>> + drm_fb_helper_fini(&hifbdev->helper);
>>> + return ret;
>>> +}
>>> +
>>> +void hibmc_fbdev_fini(struct hibmc_drm_device *hidev)
>>> +{
>>> + if (!hidev->fbdev)
>>> + return;
>>> +
>>> + hibmc_fbdev_destroy(hidev->fbdev);
>>> + hidev->fbdev = NULL;
>>> +}
>>> diff --git a/drivers/gpu/drm/hisilicon/hibmc/hibmc_ttm.c
>>> b/drivers/gpu/drm/hisilicon/hibmc/hibmc_ttm.c
>>> index 0802ebd..9822f62 100644
>>> --- a/drivers/gpu/drm/hisilicon/hibmc/hibmc_ttm.c
>>> +++ b/drivers/gpu/drm/hisilicon/hibmc/hibmc_ttm.c
>>> @@ -488,3 +488,69 @@ int hibmc_dumb_mmap_offset(struct drm_file *file,
>>> struct drm_device *dev,
>>> drm_gem_object_unreference_unlocked(obj);
>>> return 0;
>>> }
>>> +
>>> +/*
>>> ---------------------------------------------------------------------- */
>>> +
>>
>>
>> Please remove
>
>
> will do.
>
>>
>>> +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)
>>
>>
>> Print error
>
>
> ok, thanks.
>
> Regards,
> Rongrong.
>
>>
>>> + 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;
>>> +}
>>> --
>>> 1.9.1
>>>
>>>
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>>
>> _______________________________________________
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>> http://rnd-openeuler.huawei.com/mailman/listinfo/linuxarm
>>
>> .
>>
>
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