1161 lines
32 KiB
C
1161 lines
32 KiB
C
/****************************************************************************
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* drivers/video/fb.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/* Framebuffer character driver */
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <sys/types.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <string.h>
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#include <assert.h>
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#include <debug.h>
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#include <errno.h>
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#include <poll.h>
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#include <nuttx/kmalloc.h>
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#include <nuttx/fs/fs.h>
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#include <nuttx/fs/ioctl.h>
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#include <nuttx/video/fb.h>
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#include <nuttx/clock.h>
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#include <nuttx/wdog.h>
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/****************************************************************************
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* Pre-processor definitions
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****************************************************************************/
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#define FB_NO_OVERLAY -1
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/****************************************************************************
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* Private Types
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****************************************************************************/
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/* This structure defines one framebuffer device. Note that which is
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* everything in this structure is constant data set up and initialization
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* time. Therefore, no there is requirement for serialized access to this
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* structure.
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*/
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struct fb_chardev_s
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{
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FAR struct fb_vtable_s *vtable; /* Framebuffer interface */
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FAR struct pollfd *fds; /* Polling structure of waiting thread */
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uint8_t plane; /* Video plan number */
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volatile bool pollready; /* Poll ready flag */
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clock_t vsyncoffset; /* VSync offset ticks */
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struct wdog_s wdog; /* VSync offset timer */
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#ifdef CONFIG_FB_OVERLAY
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int overlay; /* Overlay number */
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#endif
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mutex_t lock; /* Mutual exclusion */
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int16_t crefs; /* Number of open references */
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};
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struct fb_panelinfo_s
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{
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FAR void *fbmem; /* Start of frame buffer memory */
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size_t fblen; /* Size of the framebuffer */
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uint8_t bpp; /* Bits per pixel */
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};
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/****************************************************************************
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* Private Function Prototypes
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****************************************************************************/
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static int fb_open(FAR struct file *filep);
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static int fb_close(FAR struct file *filep);
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static ssize_t fb_read(FAR struct file *filep, FAR char *buffer,
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size_t buflen);
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static ssize_t fb_write(FAR struct file *filep, FAR const char *buffer,
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size_t buflen);
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static off_t fb_seek(FAR struct file *filep, off_t offset, int whence);
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static int fb_ioctl(FAR struct file *filep, int cmd, unsigned long arg);
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static int fb_mmap(FAR struct file *filep,
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FAR struct mm_map_entry_s *map);
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static int fb_poll(FAR struct file *filep, FAR struct pollfd *fds,
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bool setup);
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static int fb_get_panelinfo(FAR struct fb_chardev_s *fb,
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FAR struct fb_panelinfo_s *panelinfo);
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/****************************************************************************
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* Private Data
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****************************************************************************/
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static const struct file_operations g_fb_fops =
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{
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fb_open, /* open */
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fb_close, /* close */
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fb_read, /* read */
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fb_write, /* write */
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fb_seek, /* seek */
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fb_ioctl, /* ioctl */
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fb_mmap, /* mmap */
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NULL, /* truncate */
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fb_poll /* poll */
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};
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Name: fb_open
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****************************************************************************/
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static int fb_open(FAR struct file *filep)
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{
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FAR struct inode *inode;
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FAR struct fb_chardev_s *fb;
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int ret;
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DEBUGASSERT(filep != NULL && filep->f_inode != NULL);
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inode = filep->f_inode;
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fb = inode->i_private;
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DEBUGASSERT(fb->vtable != NULL);
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ret = nxmutex_lock(&fb->lock);
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if (ret < 0)
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{
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return ret;
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}
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if (fb->crefs == 0)
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{
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if (fb->vtable->open != NULL)
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{
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ret = fb->vtable->open(fb->vtable);
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}
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}
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if (ret >= 0)
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{
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fb->crefs++;
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DEBUGASSERT(fb->crefs > 0);
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}
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nxmutex_unlock(&fb->lock);
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return ret;
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}
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/****************************************************************************
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* Name: fb_close
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****************************************************************************/
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static int fb_close(FAR struct file *filep)
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{
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FAR struct inode *inode;
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FAR struct fb_chardev_s *fb;
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int ret;
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DEBUGASSERT(filep != NULL && filep->f_inode != NULL);
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inode = filep->f_inode;
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fb = inode->i_private;
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DEBUGASSERT(fb->vtable != NULL);
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ret = nxmutex_lock(&fb->lock);
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if (ret < 0)
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{
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return ret;
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}
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if (fb->crefs == 1)
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{
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if (fb->vtable->close != NULL)
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{
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ret = fb->vtable->close(fb->vtable);
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}
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}
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if (ret >= 0)
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{
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DEBUGASSERT(fb->crefs > 0);
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fb->crefs--;
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}
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nxmutex_unlock(&fb->lock);
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return ret;
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}
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/****************************************************************************
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* Name: fb_read
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****************************************************************************/
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static ssize_t fb_read(FAR struct file *filep, FAR char *buffer, size_t len)
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{
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FAR struct inode *inode;
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FAR struct fb_chardev_s *fb;
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struct fb_panelinfo_s panelinfo;
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size_t start;
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size_t end;
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size_t size;
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int ret;
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ginfo("len: %u\n", (unsigned int)len);
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/* Get the framebuffer instance */
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DEBUGASSERT(filep != NULL && filep->f_inode != NULL);
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inode = filep->f_inode;
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fb = (FAR struct fb_chardev_s *)inode->i_private;
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/* Get panel info */
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ret = fb_get_panelinfo(fb, &panelinfo);
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if (ret < 0)
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{
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return ret;
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}
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/* Get the start and size of the transfer */
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start = filep->f_pos;
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if (start >= panelinfo.fblen)
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{
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return 0; /* Return end-of-file */
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}
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end = start + len;
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if (end >= panelinfo.fblen)
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{
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end = panelinfo.fblen;
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}
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size = end - start;
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/* And transfer the data from the frame buffer */
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memcpy(buffer, panelinfo.fbmem + start, size);
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filep->f_pos += size;
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return size;
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}
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/****************************************************************************
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* Name: fb_write
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****************************************************************************/
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static ssize_t fb_write(FAR struct file *filep, FAR const char *buffer,
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size_t len)
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{
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FAR struct inode *inode;
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FAR struct fb_chardev_s *fb;
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struct fb_panelinfo_s panelinfo;
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size_t start;
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size_t end;
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size_t size;
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int ret;
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ginfo("len: %u\n", (unsigned int)len);
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/* Get the framebuffer instance */
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DEBUGASSERT(filep != NULL && filep->f_inode != NULL);
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inode = filep->f_inode;
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fb = (FAR struct fb_chardev_s *)inode->i_private;
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/* Get panel info */
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ret = fb_get_panelinfo(fb, &panelinfo);
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if (ret < 0)
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{
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return ret;
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}
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fb->pollready = false;
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/* Get the start and size of the transfer */
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start = filep->f_pos;
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if (start >= panelinfo.fblen)
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{
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return -EFBIG; /* Cannot extend the framebuffer */
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}
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end = start + len;
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if (end >= panelinfo.fblen)
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{
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end = panelinfo.fblen;
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}
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size = end - start;
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/* And transfer the data into the frame buffer */
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memcpy(panelinfo.fbmem + start, buffer, size);
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filep->f_pos += size;
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return size;
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}
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/****************************************************************************
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* Name: fb_seek
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*
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* Description:
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* Seek the logical file pointer to the specified position. The offset
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* is in units of pixels, with offset zero being the beginning of the
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* framebuffer.
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*
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****************************************************************************/
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static off_t fb_seek(FAR struct file *filep, off_t offset, int whence)
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{
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FAR struct inode *inode;
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FAR struct fb_chardev_s *fb;
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struct fb_panelinfo_s panelinfo;
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off_t newpos;
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int ret;
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ginfo("offset: %u whence: %d\n", (unsigned int)offset, whence);
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/* Get the framebuffer instance */
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DEBUGASSERT(filep != NULL && filep->f_inode != NULL);
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inode = filep->f_inode;
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fb = (FAR struct fb_chardev_s *)inode->i_private;
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/* Determine the new, requested file position */
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switch (whence)
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{
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case SEEK_CUR:
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newpos = filep->f_pos + offset;
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break;
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case SEEK_SET:
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newpos = offset;
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break;
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case SEEK_END:
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/* Get panel info */
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ret = fb_get_panelinfo(fb, &panelinfo);
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if (ret < 0)
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{
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return ret;
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}
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newpos = panelinfo.fblen + offset;
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break;
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default:
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/* Return EINVAL if the whence argument is invalid */
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return -EINVAL;
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}
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/* Opengroup.org:
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*
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* "The lseek() function shall allow the file offset to be set beyond the
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* end of the existing data in the file. If data is later written at this
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* point, subsequent reads of data in the gap shall return bytes with the
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* value 0 until data is actually written into the gap."
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*
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* We can conform to the first part, but not the second. Return EINVAL if
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* "...the resulting file offset would be negative for a regular file,
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* block special file, or directory."
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*/
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if (newpos >= 0)
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{
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filep->f_pos = newpos;
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ret = newpos;
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}
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else
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{
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ret = -EINVAL;
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}
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return ret;
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}
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/****************************************************************************
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* Name: fb_ioctl
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*
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* Description:
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* The standard ioctl method.
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*
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****************************************************************************/
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static int fb_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
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{
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FAR struct inode *inode;
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FAR struct fb_chardev_s *fb;
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int ret;
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ginfo("cmd: %d arg: %ld\n", cmd, arg);
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/* Get the framebuffer instance */
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DEBUGASSERT(filep != NULL && filep->f_inode != NULL);
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inode = filep->f_inode;
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fb = (FAR struct fb_chardev_s *)inode->i_private;
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/* Process the IOCTL command */
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switch (cmd)
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{
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case FBIOGET_VIDEOINFO: /* Get color plane info */
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{
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FAR struct fb_videoinfo_s *vinfo =
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(FAR struct fb_videoinfo_s *)((uintptr_t)arg);
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DEBUGASSERT(vinfo != 0 && fb->vtable != NULL &&
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fb->vtable->getvideoinfo != NULL);
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ret = fb->vtable->getvideoinfo(fb->vtable, vinfo);
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}
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break;
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case FBIOGET_PLANEINFO: /* Get video plane info */
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{
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FAR struct fb_planeinfo_s *pinfo =
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(FAR struct fb_planeinfo_s *)((uintptr_t)arg);
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DEBUGASSERT(pinfo != 0 && fb->vtable != NULL &&
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fb->vtable->getplaneinfo != NULL);
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ret = fb->vtable->getplaneinfo(fb->vtable, fb->plane, pinfo);
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}
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break;
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#ifdef CONFIG_FB_CMAP
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case FBIOGET_CMAP: /* Get RGB color mapping */
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{
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FAR struct fb_cmap_s *cmap =
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(FAR struct fb_cmap_s *)((uintptr_t)arg);
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DEBUGASSERT(cmap != 0 && fb->vtable != NULL &&
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fb->vtable->getcmap != NULL);
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ret = fb->vtable->getcmap(fb->vtable, cmap);
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}
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break;
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case FBIOPUT_CMAP: /* Put RGB color mapping */
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{
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FAR const struct fb_cmap_s *cmap =
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(FAR struct fb_cmap_s *)((uintptr_t)arg);
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DEBUGASSERT(cmap != 0 && fb->vtable != NULL &&
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fb->vtable->putcmap != NULL);
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ret = fb->vtable->putcmap(fb->vtable, cmap);
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}
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break;
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#endif
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#ifdef CONFIG_FB_HWCURSOR
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case FBIOGET_CURSOR: /* Get cursor attributes */
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{
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FAR struct fb_cursorattrib_s *attrib =
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(FAR struct fb_cursorattrib_s *)((uintptr_t)arg);
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DEBUGASSERT(attrib != 0 && fb->vtable != NULL &&
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fb->vtable->getcursor != NULL);
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ret = fb->vtable->getcursor(fb->vtable, attrib);
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}
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break;
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case FBIOPUT_CURSOR: /* Set cursor attributes */
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{
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FAR struct fb_setcursor_s *cursor =
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(FAR struct fb_setcursor_s *)((uintptr_t)arg);
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DEBUGASSERT(cursor != 0 && fb->vtable != NULL &&
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fb->vtable->setcursor != NULL);
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ret = fb->vtable->setcursor(fb->vtable, cursor);
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}
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break;
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#endif
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#ifdef CONFIG_FB_UPDATE
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case FBIO_UPDATE: /* Update the modified framebuffer data */
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{
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struct fb_area_s *area = (FAR struct fb_area_s *)((uintptr_t)arg);
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DEBUGASSERT(fb->vtable != NULL && fb->vtable->updatearea != NULL);
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ret = fb->vtable->updatearea(fb->vtable, area);
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}
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break;
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#endif
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#ifdef CONFIG_FB_SYNC
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case FBIO_WAITFORVSYNC: /* Wait upon vertical sync */
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{
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ret = fb->vtable->waitforvsync(fb->vtable);
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}
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break;
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#endif
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#ifdef CONFIG_FB_OVERLAY
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case FBIO_SELECT_OVERLAY: /* Select video overlay */
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{
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struct fb_overlayinfo_s oinfo;
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DEBUGASSERT(fb->vtable != NULL &&
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fb->vtable->getoverlayinfo != NULL);
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memset(&oinfo, 0, sizeof(oinfo));
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ret = fb->vtable->getoverlayinfo(fb->vtable, arg, &oinfo);
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if (ret == OK)
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{
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fb->overlay = arg;
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}
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}
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break;
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case FBIOGET_OVERLAYINFO: /* Get video overlay info */
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{
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FAR struct fb_overlayinfo_s *oinfo =
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(FAR struct fb_overlayinfo_s *)((uintptr_t)arg);
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DEBUGASSERT(oinfo != 0 && fb->vtable != NULL &&
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fb->vtable->getoverlayinfo != NULL);
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ret = fb->vtable->getoverlayinfo(fb->vtable,
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oinfo->overlay, oinfo);
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}
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break;
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case FBIOSET_TRANSP: /* Set video overlay transparency */
|
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{
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FAR struct fb_overlayinfo_s *oinfo =
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(FAR struct fb_overlayinfo_s *)((uintptr_t)arg);
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DEBUGASSERT(oinfo != 0 && fb->vtable != NULL &&
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fb->vtable->settransp != NULL);
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ret = fb->vtable->settransp(fb->vtable, oinfo);
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}
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break;
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case FBIOSET_CHROMAKEY: /* Set video overlay chroma key */
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{
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FAR struct fb_overlayinfo_s *oinfo =
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(FAR struct fb_overlayinfo_s *)((uintptr_t)arg);
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|
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DEBUGASSERT(oinfo != 0 && fb->vtable != NULL &&
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fb->vtable->setchromakey != NULL);
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ret = fb->vtable->setchromakey(fb->vtable, oinfo);
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}
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break;
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|
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case FBIOSET_COLOR: /* Set video overlay color */
|
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{
|
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FAR struct fb_overlayinfo_s *oinfo =
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(FAR struct fb_overlayinfo_s *)((uintptr_t)arg);
|
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|
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DEBUGASSERT(oinfo != 0 && fb->vtable != NULL &&
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fb->vtable->setcolor != NULL);
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ret = fb->vtable->setcolor(fb->vtable, oinfo);
|
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}
|
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break;
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|
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case FBIOSET_BLANK: /* Blank or unblank video overlay */
|
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{
|
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FAR struct fb_overlayinfo_s *oinfo =
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(FAR struct fb_overlayinfo_s *)((uintptr_t)arg);
|
|
|
|
DEBUGASSERT(oinfo != 0 && fb->vtable != NULL &&
|
|
fb->vtable->setblank != NULL);
|
|
ret = fb->vtable->setblank(fb->vtable, oinfo);
|
|
}
|
|
break;
|
|
|
|
case FBIOSET_AREA: /* Set active video overlay area */
|
|
{
|
|
FAR struct fb_overlayinfo_s *oinfo =
|
|
(FAR struct fb_overlayinfo_s *)((uintptr_t)arg);
|
|
|
|
DEBUGASSERT(oinfo != 0 && fb->vtable != NULL &&
|
|
fb->vtable->setarea != NULL);
|
|
ret = fb->vtable->setarea(fb->vtable, oinfo);
|
|
}
|
|
break;
|
|
|
|
#ifdef CONFIG_FB_OVERLAY_BLIT
|
|
case FBIOSET_BLIT: /* Blit operation between video overlays */
|
|
{
|
|
FAR struct fb_overlayblit_s *blit =
|
|
(FAR struct fb_overlayblit_s *)((uintptr_t)arg);
|
|
|
|
DEBUGASSERT(blit != 0 && fb->vtable != NULL &&
|
|
fb->vtable->blit != NULL);
|
|
ret = fb->vtable->blit(fb->vtable, blit);
|
|
}
|
|
break;
|
|
|
|
case FBIOSET_BLEND: /* Blend operation between video overlays */
|
|
{
|
|
FAR struct fb_overlayblend_s *blend =
|
|
(FAR struct fb_overlayblend_s *)((uintptr_t)arg);
|
|
|
|
DEBUGASSERT(blend != 0 && fb->vtable != NULL &&
|
|
fb->vtable->blend != NULL);
|
|
ret = fb->vtable->blend(fb->vtable, blend);
|
|
}
|
|
break;
|
|
#endif
|
|
#endif /* CONFIG_FB_OVERLAY */
|
|
|
|
case FBIOSET_POWER:
|
|
{
|
|
DEBUGASSERT(fb->vtable != NULL &&
|
|
fb->vtable->setpower != NULL);
|
|
ret = fb->vtable->setpower(fb->vtable, (int)arg);
|
|
}
|
|
break;
|
|
|
|
case FBIOGET_POWER:
|
|
{
|
|
FAR int *power = (FAR int *)((uintptr_t)arg);
|
|
|
|
DEBUGASSERT(power != NULL && fb->vtable != NULL &&
|
|
fb->vtable->getpower != NULL);
|
|
*(power) = fb->vtable->getpower(fb->vtable);
|
|
ret = OK;
|
|
}
|
|
break;
|
|
|
|
case FBIOGET_FRAMERATE:
|
|
{
|
|
FAR int *rate = (FAR int *)((uintptr_t)arg);
|
|
|
|
DEBUGASSERT(rate != NULL && fb->vtable != NULL &&
|
|
fb->vtable->getframerate != NULL);
|
|
*(rate) = fb->vtable->getframerate(fb->vtable);
|
|
ret = OK;
|
|
}
|
|
break;
|
|
|
|
case FBIOSET_FRAMERATE:
|
|
{
|
|
DEBUGASSERT(fb->vtable != NULL &&
|
|
fb->vtable->setframerate != NULL);
|
|
ret = fb->vtable->setframerate(fb->vtable, (int)arg);
|
|
}
|
|
break;
|
|
|
|
case FBIOPAN_DISPLAY:
|
|
{
|
|
FAR struct fb_planeinfo_s *pinfo =
|
|
(FAR struct fb_planeinfo_s *)((uintptr_t)arg);
|
|
|
|
DEBUGASSERT(pinfo != NULL && fb->vtable != NULL &&
|
|
fb->vtable->pandisplay != NULL);
|
|
ret = fb->vtable->pandisplay(fb->vtable, pinfo);
|
|
fb->pollready = false;
|
|
}
|
|
break;
|
|
|
|
case FBIO_CLEARNOTIFY:
|
|
{
|
|
fb->pollready = false;
|
|
ret = OK;
|
|
}
|
|
break;
|
|
|
|
case FBIOSET_VSYNCOFFSET:
|
|
{
|
|
fb->vsyncoffset = USEC2TICK(arg);
|
|
ret = OK;
|
|
}
|
|
break;
|
|
|
|
case FBIOGET_VSCREENINFO:
|
|
{
|
|
struct fb_videoinfo_s vinfo;
|
|
struct fb_planeinfo_s pinfo;
|
|
FAR struct fb_var_screeninfo *varinfo =
|
|
(FAR struct fb_var_screeninfo *)((uintptr_t)arg);
|
|
|
|
DEBUGASSERT(varinfo != 0 && fb->vtable != NULL &&
|
|
fb->vtable->getvideoinfo != NULL &&
|
|
fb->vtable->getplaneinfo != NULL);
|
|
ret = fb->vtable->getvideoinfo(fb->vtable, &vinfo);
|
|
if (ret < 0)
|
|
{
|
|
break;
|
|
}
|
|
|
|
memset(&pinfo, 0, sizeof(pinfo));
|
|
ret = fb->vtable->getplaneinfo(fb->vtable, fb->plane, &pinfo);
|
|
if (ret < 0)
|
|
{
|
|
break;
|
|
}
|
|
|
|
memset(varinfo, 0, sizeof(struct fb_var_screeninfo));
|
|
varinfo->xres = vinfo.xres;
|
|
varinfo->yres = vinfo.yres;
|
|
varinfo->xres_virtual = pinfo.xres_virtual;
|
|
varinfo->yres_virtual = pinfo.yres_virtual;
|
|
varinfo->xoffset = pinfo.xoffset;
|
|
varinfo->yoffset = pinfo.yoffset;
|
|
varinfo->bits_per_pixel = pinfo.bpp;
|
|
varinfo->grayscale = FB_ISMONO(vinfo.fmt);
|
|
switch (vinfo.fmt)
|
|
{
|
|
case FB_FMT_Y1:
|
|
varinfo->red.offset = 0;
|
|
varinfo->green.offset = 0;
|
|
varinfo->blue.offset = 0;
|
|
varinfo->red.length = 1;
|
|
varinfo->green.length = 1;
|
|
varinfo->blue.length = 1;
|
|
break;
|
|
|
|
case FB_FMT_Y8:
|
|
varinfo->red.offset = 0;
|
|
varinfo->green.offset = 0;
|
|
varinfo->blue.offset = 0;
|
|
varinfo->red.length = 8;
|
|
varinfo->green.length = 8;
|
|
varinfo->blue.length = 8;
|
|
break;
|
|
|
|
case FB_FMT_RGB16_555:
|
|
varinfo->red.offset = 10;
|
|
varinfo->green.offset = 5;
|
|
varinfo->blue.offset = 0;
|
|
varinfo->red.length = 5;
|
|
varinfo->green.length = 5;
|
|
varinfo->blue.length = 5;
|
|
break;
|
|
|
|
case FB_FMT_RGB16_565:
|
|
varinfo->red.offset = 11;
|
|
varinfo->green.offset = 5;
|
|
varinfo->blue.offset = 0;
|
|
varinfo->red.length = 5;
|
|
varinfo->green.length = 6;
|
|
varinfo->blue.length = 5;
|
|
break;
|
|
|
|
case FB_FMT_RGB24:
|
|
case FB_FMT_RGB32:
|
|
varinfo->red.offset = 16;
|
|
varinfo->green.offset = 8;
|
|
varinfo->blue.offset = 0;
|
|
varinfo->red.length = 8;
|
|
varinfo->green.length = 8;
|
|
varinfo->blue.length = 8;
|
|
break;
|
|
|
|
case FB_FMT_RGBA32:
|
|
varinfo->red.offset = 16;
|
|
varinfo->green.offset = 8;
|
|
varinfo->blue.offset = 0;
|
|
varinfo->transp.offset = 24;
|
|
varinfo->red.length = 8;
|
|
varinfo->green.length = 8;
|
|
varinfo->blue.length = 8;
|
|
varinfo->transp.length = 8;
|
|
break;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case FBIOGET_FSCREENINFO:
|
|
{
|
|
struct fb_videoinfo_s vinfo;
|
|
struct fb_planeinfo_s pinfo;
|
|
FAR struct fb_fix_screeninfo *fixinfo =
|
|
(FAR struct fb_fix_screeninfo *)((uintptr_t)arg);
|
|
|
|
DEBUGASSERT(fixinfo != 0 && fb->vtable != NULL &&
|
|
fb->vtable->getvideoinfo != NULL &&
|
|
fb->vtable->getplaneinfo != NULL);
|
|
ret = fb->vtable->getvideoinfo(fb->vtable, &vinfo);
|
|
if (ret < 0)
|
|
{
|
|
break;
|
|
}
|
|
|
|
memset(&pinfo, 0, sizeof(pinfo));
|
|
ret = fb->vtable->getplaneinfo(fb->vtable, fb->plane, &pinfo);
|
|
if (ret < 0)
|
|
{
|
|
break;
|
|
}
|
|
|
|
memset(fixinfo, 0, sizeof(struct fb_fix_screeninfo));
|
|
#ifdef CONFIG_FB_MODULEINFO
|
|
strlcpy(fixinfo->id, (FAR const char *)vinfo.moduleinfo,
|
|
sizeof(fixinfo->id));
|
|
#endif
|
|
fixinfo->smem_start = (unsigned long)pinfo.fbmem;
|
|
fixinfo->smem_len = pinfo.fblen;
|
|
fixinfo->type = FB_ISYUVPLANAR(vinfo.fmt) ?
|
|
FB_TYPE_INTERLEAVED_PLANES :
|
|
FB_TYPE_PACKED_PIXELS;
|
|
fixinfo->visual = FB_ISMONO(vinfo.fmt) ?
|
|
FB_VISUAL_MONO10 : FB_VISUAL_TRUECOLOR;
|
|
fixinfo->line_length = pinfo.stride;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
if (fb->vtable->ioctl != NULL)
|
|
{
|
|
ret = fb->vtable->ioctl(fb->vtable, cmd, arg);
|
|
}
|
|
else
|
|
{
|
|
gerr("ERROR: Unsupported IOCTL command: %d\n", cmd);
|
|
ret = -ENOTTY;
|
|
}
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int fb_mmap(FAR struct file *filep, FAR struct mm_map_entry_s *map)
|
|
{
|
|
FAR struct inode *inode;
|
|
FAR struct fb_chardev_s *fb;
|
|
struct fb_panelinfo_s panelinfo;
|
|
int ret;
|
|
|
|
/* Get the framebuffer instance */
|
|
|
|
DEBUGASSERT(filep != NULL && filep->f_inode != NULL);
|
|
inode = filep->f_inode;
|
|
fb = (FAR struct fb_chardev_s *)inode->i_private;
|
|
|
|
/* Get panel info */
|
|
|
|
ret = fb_get_panelinfo(fb, &panelinfo);
|
|
|
|
if (ret < 0)
|
|
{
|
|
return ret;
|
|
}
|
|
|
|
/* Return the address corresponding to the start of frame buffer. */
|
|
|
|
if (map->offset >= 0 && map->offset < panelinfo.fblen &&
|
|
map->length && map->offset + map->length <= panelinfo.fblen)
|
|
{
|
|
map->vaddr = (FAR char *)panelinfo.fbmem + map->offset;
|
|
return OK;
|
|
}
|
|
|
|
return -EINVAL;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: fb_poll
|
|
*
|
|
* Description:
|
|
* Wait for framebuffer to be writable.
|
|
*
|
|
****************************************************************************/
|
|
|
|
static int fb_poll(FAR struct file *filep, struct pollfd *fds, bool setup)
|
|
{
|
|
FAR struct inode *inode;
|
|
FAR struct fb_chardev_s *fb;
|
|
|
|
/* Get the framebuffer instance */
|
|
|
|
DEBUGASSERT(filep != NULL && filep->f_inode != NULL);
|
|
inode = filep->f_inode;
|
|
fb = (FAR struct fb_chardev_s *)inode->i_private;
|
|
|
|
if (setup)
|
|
{
|
|
if (fb->fds == NULL)
|
|
{
|
|
fb->fds = fds;
|
|
fds->priv = &fb->fds;
|
|
}
|
|
else
|
|
{
|
|
return -EBUSY;
|
|
}
|
|
|
|
if (fb->pollready)
|
|
{
|
|
poll_notify(&fb->fds, 1, POLLOUT);
|
|
}
|
|
}
|
|
else if (fds->priv)
|
|
{
|
|
fb->fds = NULL;
|
|
fds->priv = NULL;
|
|
}
|
|
|
|
return OK;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: fb_get_panelinfo
|
|
****************************************************************************/
|
|
|
|
static int fb_get_panelinfo(FAR struct fb_chardev_s *fb,
|
|
FAR struct fb_panelinfo_s *panelinfo)
|
|
{
|
|
struct fb_planeinfo_s pinfo;
|
|
int ret;
|
|
|
|
#ifdef CONFIG_FB_OVERLAY
|
|
if (fb->overlay != FB_NO_OVERLAY)
|
|
{
|
|
struct fb_overlayinfo_s oinfo;
|
|
DEBUGASSERT(fb->vtable->getoverlayinfo != NULL);
|
|
memset(&oinfo, 0, sizeof(oinfo));
|
|
ret = fb->vtable->getoverlayinfo(fb->vtable, fb->overlay, &oinfo);
|
|
|
|
if (ret < 0)
|
|
{
|
|
gerr("ERROR: getoverlayinfo() failed: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
panelinfo->fbmem = oinfo.fbmem;
|
|
panelinfo->fblen = oinfo.fblen;
|
|
panelinfo->bpp = oinfo.bpp;
|
|
return OK;
|
|
}
|
|
#endif
|
|
|
|
DEBUGASSERT(fb->vtable != NULL);
|
|
DEBUGASSERT(fb->vtable->getplaneinfo != NULL);
|
|
memset(&pinfo, 0, sizeof(pinfo));
|
|
|
|
ret = fb->vtable->getplaneinfo(fb->vtable, fb->plane, &pinfo);
|
|
|
|
if (ret < 0)
|
|
{
|
|
gerr("ERROR: getplaneinfo() failed: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
panelinfo->fbmem = pinfo.fbmem;
|
|
panelinfo->fblen = pinfo.fblen;
|
|
panelinfo->bpp = pinfo.bpp;
|
|
|
|
return OK;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: fb_do_pollnotify
|
|
****************************************************************************/
|
|
|
|
static void fb_do_pollnotify(wdparm_t arg)
|
|
{
|
|
FAR struct fb_chardev_s *fb = (FAR struct fb_chardev_s *)arg;
|
|
|
|
fb->pollready = true;
|
|
|
|
/* Notify framebuffer is writable. */
|
|
|
|
poll_notify(&fb->fds, 1, POLLOUT);
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: fb_pollnotify
|
|
*
|
|
* Description:
|
|
* Notify the waiting thread that the framebuffer can be written.
|
|
*
|
|
* Input Parameters:
|
|
* vtable - Pointer to framebuffer's virtual table.
|
|
*
|
|
****************************************************************************/
|
|
|
|
void fb_pollnotify(FAR struct fb_vtable_s *vtable)
|
|
{
|
|
FAR struct fb_chardev_s *fb;
|
|
|
|
DEBUGASSERT(vtable != NULL);
|
|
|
|
fb = vtable->priv;
|
|
|
|
/* Prevent calling before getting the vtable. */
|
|
|
|
if (fb == NULL)
|
|
{
|
|
return;
|
|
}
|
|
|
|
if (fb->vsyncoffset > 0)
|
|
{
|
|
wd_start(&fb->wdog, fb->vsyncoffset, fb_do_pollnotify, (wdparm_t)fb);
|
|
}
|
|
else
|
|
{
|
|
fb_do_pollnotify((wdparm_t)fb);
|
|
}
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: fb_register
|
|
*
|
|
* Description:
|
|
* Register the framebuffer character device at /dev/fbN where N is the
|
|
* display number if the devices supports only a single plane. If the
|
|
* hardware supports multiple color planes, then the device will be
|
|
* registered at /dev/fbN.M where N is the again display number but M
|
|
* is the display plane.
|
|
*
|
|
* Input Parameters:
|
|
* display - The display number for the case of boards supporting multiple
|
|
* displays or for hardware that supports multiple
|
|
* layers (each layer is consider a display). Typically zero.
|
|
* plane - Identifies the color plane on hardware that supports separate
|
|
* framebuffer "planes" for each color component.
|
|
*
|
|
* Returned Value:
|
|
* Zero (OK) is returned success; a negated errno value is returned on any
|
|
* failure.
|
|
*
|
|
****************************************************************************/
|
|
|
|
int fb_register(int display, int plane)
|
|
{
|
|
FAR struct fb_chardev_s *fb;
|
|
struct fb_panelinfo_s panelinfo;
|
|
struct fb_videoinfo_s vinfo;
|
|
#ifdef CONFIG_FB_OVERLAY
|
|
struct fb_overlayinfo_s oinfo;
|
|
#endif
|
|
char devname[16];
|
|
int nplanes;
|
|
int ret;
|
|
|
|
/* Allocate a framebuffer state instance */
|
|
|
|
fb = (FAR struct fb_chardev_s *)kmm_zalloc(sizeof(struct fb_chardev_s));
|
|
if (fb == NULL)
|
|
{
|
|
return -ENOMEM;
|
|
}
|
|
|
|
#ifdef CONFIG_FB_OVERLAY
|
|
|
|
/* Set the default overlay number */
|
|
|
|
fb->overlay = FB_NO_OVERLAY;
|
|
#endif
|
|
|
|
/* Initialize the frame buffer device. */
|
|
|
|
ret = up_fbinitialize(display);
|
|
if (ret < 0)
|
|
{
|
|
gerr("ERROR: up_fbinitialize() failed for display %d: %d\n",
|
|
display, ret);
|
|
goto errout_with_fb;
|
|
}
|
|
|
|
DEBUGASSERT((unsigned)plane <= UINT8_MAX);
|
|
fb->plane = plane;
|
|
|
|
fb->vtable = up_fbgetvplane(display, plane);
|
|
if (fb->vtable == NULL)
|
|
{
|
|
gerr("ERROR: up_fbgetvplane() failed, vplane=%d\n", plane);
|
|
goto errout_with_fb;
|
|
}
|
|
|
|
fb->vtable->priv = fb;
|
|
|
|
/* Initialize the frame buffer instance. */
|
|
|
|
DEBUGASSERT(fb->vtable->getvideoinfo != NULL);
|
|
ret = fb->vtable->getvideoinfo(fb->vtable, &vinfo);
|
|
if (ret < 0)
|
|
{
|
|
gerr("ERROR: getvideoinfo() failed: %d\n", ret);
|
|
goto errout_with_fb;
|
|
}
|
|
|
|
nplanes = vinfo.nplanes;
|
|
DEBUGASSERT(vinfo.nplanes > 0 && (unsigned)plane < vinfo.nplanes);
|
|
|
|
/* Get panel info */
|
|
|
|
ret = fb_get_panelinfo(fb, &panelinfo);
|
|
|
|
if (ret < 0)
|
|
{
|
|
goto errout_with_fb;
|
|
}
|
|
|
|
/* Clear the framebuffer memory */
|
|
|
|
memset(panelinfo.fbmem, 0, panelinfo.fblen);
|
|
|
|
#ifdef CONFIG_FB_OVERLAY
|
|
/* Initialize first overlay but do not select */
|
|
|
|
DEBUGASSERT(fb->vtable->getoverlayinfo != NULL);
|
|
memset(&oinfo, 0, sizeof(oinfo));
|
|
ret = fb->vtable->getoverlayinfo(fb->vtable, 0, &oinfo);
|
|
if (ret < 0)
|
|
{
|
|
gerr("ERROR: getoverlayinfo() failed: %d\n", ret);
|
|
goto errout_with_fb;
|
|
}
|
|
|
|
/* Clear the overlay memory. Necessary when plane 0 and overlay 0
|
|
* different.
|
|
*/
|
|
|
|
memset(oinfo.fbmem, 0, oinfo.fblen);
|
|
#endif
|
|
|
|
/* Register the framebuffer device */
|
|
|
|
if (nplanes < 2)
|
|
{
|
|
snprintf(devname, 16, "/dev/fb%d", display);
|
|
}
|
|
else
|
|
{
|
|
snprintf(devname, 16, "/dev/fb%d.%d", display, plane);
|
|
}
|
|
|
|
nxmutex_init(&fb->lock);
|
|
|
|
ret = register_driver(devname, &g_fb_fops, 0666, (FAR void *)fb);
|
|
if (ret < 0)
|
|
{
|
|
gerr("ERROR: register_driver() failed: %d\n", ret);
|
|
goto errout_with_fb;
|
|
}
|
|
|
|
return OK;
|
|
|
|
errout_with_fb:
|
|
nxmutex_destroy(&fb->lock);
|
|
kmm_free(fb);
|
|
return ret;
|
|
}
|