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none X-Spamd-Result: default: False [0.90 / 50.00]; ARC_NA(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; FROM_HAS_DN(0.00)[]; TO_DN_SOME(0.00)[]; FREEMAIL_ENVRCPT(0.00)[gmail.com,gmx.de]; R_MISSING_CHARSET(2.50)[]; MIME_GOOD(-0.10)[text/plain]; TO_MATCH_ENVRCPT_ALL(0.00)[]; REPLY(-4.00)[]; BROKEN_CONTENT_TYPE(1.50)[]; RCVD_COUNT_THREE(0.00)[3]; DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; RCPT_COUNT_SEVEN(0.00)[7]; MID_CONTAINS_FROM(1.00)[]; FREEMAIL_TO(0.00)[ffwll.ch,gmail.com,gmx.de,redhat.com]; FUZZY_BLOCKED(0.00)[rspamd.com]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+]; RCVD_TLS_ALL(0.00)[]; BAYES_HAM(-0.00)[28.89%] X-Spam-Score: 0.90 X-Spam-Flag: NO Add support for damage handling and deferred I/O to fbdev-dma. This enables fbdev-dma to support all DMA-memory-based DRM drivers, even such with a dirty callback in their framebuffers. The patch adds the code for deferred I/O and also sets a dedicated helper for struct fb_ops.fb_mmap that support coherent mappings. Signed-off-by: Thomas Zimmermann --- drivers/gpu/drm/drm_fbdev_dma.c | 65 ++++++++++++++++++++++++++------- 1 file changed, 51 insertions(+), 14 deletions(-) diff --git a/drivers/gpu/drm/drm_fbdev_dma.c b/drivers/gpu/drm/drm_fbdev_dma.c index 6c9427bb4053b..8ffd072368bca 100644 --- a/drivers/gpu/drm/drm_fbdev_dma.c +++ b/drivers/gpu/drm/drm_fbdev_dma.c @@ -4,6 +4,7 @@ #include #include +#include #include #include #include @@ -35,6 +36,22 @@ static int drm_fbdev_dma_fb_release(struct fb_info *info, int user) return 0; } +FB_GEN_DEFAULT_DEFERRED_SYSMEM_OPS(drm_fbdev_dma, + drm_fb_helper_damage_range, + drm_fb_helper_damage_area); + +static int drm_fbdev_dma_fb_mmap(struct fb_info *info, struct vm_area_struct *vma) +{ + struct drm_fb_helper *fb_helper = info->par; + struct drm_framebuffer *fb = fb_helper->fb; + struct drm_gem_dma_object *dma = drm_fb_dma_get_gem_obj(fb, 0); + + if (!dma->map_noncoherent) + vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot); + + return fb_deferred_io_mmap(info, vma); +} + static void drm_fbdev_dma_fb_destroy(struct fb_info *info) { struct drm_fb_helper *fb_helper = info->par; @@ -51,20 +68,13 @@ static void drm_fbdev_dma_fb_destroy(struct fb_info *info) kfree(fb_helper); } -static int drm_fbdev_dma_fb_mmap(struct fb_info *info, struct vm_area_struct *vma) -{ - struct drm_fb_helper *fb_helper = info->par; - - return drm_gem_prime_mmap(fb_helper->buffer->gem, vma); -} - static const struct fb_ops drm_fbdev_dma_fb_ops = { .owner = THIS_MODULE, .fb_open = drm_fbdev_dma_fb_open, .fb_release = drm_fbdev_dma_fb_release, - __FB_DEFAULT_DMAMEM_OPS_RDWR, + __FB_DEFAULT_DEFERRED_OPS_RDWR(drm_fbdev_dma), DRM_FB_HELPER_DEFAULT_OPS, - __FB_DEFAULT_DMAMEM_OPS_DRAW, + __FB_DEFAULT_DEFERRED_OPS_DRAW(drm_fbdev_dma), .fb_mmap = drm_fbdev_dma_fb_mmap, .fb_destroy = drm_fbdev_dma_fb_destroy, }; @@ -98,10 +108,6 @@ static int drm_fbdev_dma_helper_fb_probe(struct drm_fb_helper *fb_helper, dma_obj = to_drm_gem_dma_obj(buffer->gem); fb = buffer->fb; - if (drm_WARN_ON(dev, fb->funcs->dirty)) { - ret = -ENODEV; /* damage handling not supported; use generic emulation */ - goto err_drm_client_buffer_delete; - } ret = drm_client_buffer_vmap(buffer, &map); if (ret) { @@ -112,7 +118,7 @@ static int drm_fbdev_dma_helper_fb_probe(struct drm_fb_helper *fb_helper, } fb_helper->buffer = buffer; - fb_helper->fb = buffer->fb; + fb_helper->fb = fb; info = drm_fb_helper_alloc_info(fb_helper); if (IS_ERR(info)) { @@ -133,8 +139,19 @@ static int drm_fbdev_dma_helper_fb_probe(struct drm_fb_helper *fb_helper, info->fix.smem_start = page_to_phys(virt_to_page(info->screen_buffer)); info->fix.smem_len = info->screen_size; + /* deferred I/O */ + fb_helper->fbdefio.delay = HZ / 20; + fb_helper->fbdefio.deferred_io = drm_fb_helper_deferred_io; + + info->fbdefio = &fb_helper->fbdefio; + ret = fb_deferred_io_init(info); + if (ret) + goto err_drm_fb_helper_release_info; + return 0; +err_drm_fb_helper_release_info: + drm_fb_helper_release_info(fb_helper); err_drm_client_buffer_vunmap: fb_helper->fb = NULL; fb_helper->buffer = NULL; @@ -144,8 +161,28 @@ static int drm_fbdev_dma_helper_fb_probe(struct drm_fb_helper *fb_helper, return ret; } +static int drm_fbdev_dma_helper_fb_dirty(struct drm_fb_helper *helper, + struct drm_clip_rect *clip) +{ + struct drm_device *dev = helper->dev; + int ret; + + /* Call damage handlers only if necessary */ + if (!(clip->x1 < clip->x2 && clip->y1 < clip->y2)) + return 0; + + if (helper->fb->funcs->dirty) { + ret = helper->fb->funcs->dirty(helper->fb, NULL, 0, 0, clip, 1); + if (drm_WARN_ONCE(dev, ret, "Dirty helper failed: ret=%d\n", ret)) + return ret; + } + + return 0; +} + static const struct drm_fb_helper_funcs drm_fbdev_dma_helper_funcs = { .fb_probe = drm_fbdev_dma_helper_fb_probe, + .fb_dirty = drm_fbdev_dma_helper_fb_dirty, }; /*