From: Benjamin Gaignard <benjamin.gaignard@linaro.org>
To: dri-devel@lists.freedesktop.org, airlied@redhat.com,
daniel@ffwll.ch, robdclark@gmail.com,
laurent.pinchart@ideasonboard.com
Cc: yannick.fertre@st.com, linaro-kernel@lists.linaro.org,
philippe.cornu@st.com
Subject: [RFC v3 1/3] fbmem: add default get_fb_unmapped_area function
Date: Wed, 30 Nov 2016 20:34:17 +0100 [thread overview]
Message-ID: <1480534459-7239-2-git-send-email-benjamin.gaignard@linaro.org> (raw)
In-Reply-To: <1480534459-7239-1-git-send-email-benjamin.gaignard@linaro.org>
If HAVE_ARCH_FB_UNMAPPED_AREA is set and get_fb_unmapped_area
function not defined in platform architecture let use a default function.
Signed-off-by: Benjamin Gaignard <benjamin.gaignard@linaro.org>
---
drivers/video/fbdev/core/fbmem.c | 15 +++++++++++++++
1 file changed, 15 insertions(+)
diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c
index 76c1ad9..54488ee 100644
--- a/drivers/video/fbdev/core/fbmem.c
+++ b/drivers/video/fbdev/core/fbmem.c
@@ -1492,6 +1492,21 @@ static long fb_compat_ioctl(struct file *file, unsigned int cmd,
return 0;
}
+#if defined(HAVE_ARCH_FB_UNMAPPED_AREA) && !defined(get_fb_unmapped_area)
+unsigned long get_fb_unmapped_area(struct file *filp,
+ unsigned long addr, unsigned long len,
+ unsigned long pgoff, unsigned long flags)
+{
+ struct fb_info * const info = filp->private_data;
+ unsigned long fb_size = PAGE_ALIGN(info->fix.smem_len);
+
+ if (pgoff > fb_size || len > fb_size - pgoff)
+ return -EINVAL;
+
+ return (unsigned long)info->screen_base + pgoff;
+}
+#endif
+
static const struct file_operations fb_fops = {
.owner = THIS_MODULE,
.read = fb_read,
--
1.9.1
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next prev parent reply other threads:[~2016-11-30 19:34 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-11-30 19:34 [RFC v3 0/3] Hello, Benjamin Gaignard
2016-11-30 19:34 ` Benjamin Gaignard [this message]
2016-11-30 19:39 ` [RFC v3 1/3] fbmem: add default get_fb_unmapped_area function Laurent Pinchart
2016-11-30 19:46 ` Benjamin Gaignard
2016-12-01 1:13 ` Laurent Pinchart
2016-12-01 7:24 ` Benjamin Gaignard
2016-12-01 8:38 ` Laurent Pinchart
2016-12-01 2:31 ` Michel Dänzer
2016-12-01 7:27 ` Benjamin Gaignard
2016-12-01 8:42 ` Laurent Pinchart
2016-11-30 19:34 ` [RFC v3 2/3] drm: compile drm_vm.c only when needed Benjamin Gaignard
2016-11-30 19:40 ` Laurent Pinchart
2016-11-30 19:34 ` [RFC v3 3/3] drm: allow to use mmuless SoC Benjamin Gaignard
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