Add OMAP graphics driver (Tobias Jakobi)

AUTHORS

@@ -20,6 +20,9 @@ Daniel De Matteis - <[email protected]>
    - Blackberry 10/Playbook port
    - iOS port patches
 
+Tobias Jakobi - <TBA>
+   - OMAP graphics driver
+
 Jason Fetters - <TBA>
    - Phoenix Java frontend
    - Android port patches

Makefile

@@ -186,6 +186,10 @@ ifeq ($(HAVE_SDL), 1)
    LIBS += $(SDL_LIBS)
 endif
 
+ifeq ($(HAVE_OMAP), 1)
+	OBJ += gfx/omap_gfx.o gfx/fbdev.o
+endif
+
 ifeq ($(HAVE_OPENGL), 1)
    OBJ += gfx/gl.o \
 			 gfx/gfx_context.o \

config.def.h

@@ -44,6 +44,7 @@ enum
    VIDEO_D3D9,
    VIDEO_VG,
    VIDEO_NULL,
+   VIDEO_OMAP,
 
    AUDIO_RSOUND,
    AUDIO_OSS,

driver.c

@@ -122,6 +122,9 @@ static const video_driver_t *video_drivers[] = {
 #ifdef HAVE_NULLVIDEO
    &video_null,
 #endif
+#ifdef HAVE_OMAP
+   &video_omap,
+#endif
 };
 
 static const input_driver_t *input_drivers[] = {

driver.h

@@ -516,6 +516,7 @@ extern const video_driver_t video_xdk_d3d;
 extern const video_driver_t video_sdl;
 extern const video_driver_t video_vg;
 extern const video_driver_t video_null;
+extern const video_driver_t video_omap;
 extern const input_driver_t input_android;
 extern const input_driver_t input_sdl;
 extern const input_driver_t input_dinput;

gfx/fbdev.c

@@ -0,0 +1,319 @@
+/*
+ * (C) Gražvydas "notaz" Ignotas, 2009-2010
+ *
+ * This work is licensed under the terms of any of these licenses
+ * (at your option):
+ *  - GNU GPL, version 2 or later.
+ *  - GNU LGPL, version 2.1 or later.
+ * See the COPYING file in the top-level directory.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <sys/ioctl.h>
+#include <sys/mman.h>
+#include <unistd.h>
+#include <linux/fb.h>
+#include <linux/matroxfb.h>
+
+#include "fbdev.h"
+
+#define PFX "fbdev: "
+
+struct vout_fbdev {
+	int	fd;
+	void	*mem;
+	size_t	mem_size;
+	struct	fb_var_screeninfo fbvar_old;
+	struct	fb_var_screeninfo fbvar_new;
+	int	buffer_write;
+	int	fb_size;
+	int	buffer_count;
+	int	top_border, bottom_border;
+	void	*mem_saved;
+	size_t	mem_saved_size;
+};
+
+void *vout_fbdev_flip(struct vout_fbdev *fbdev)
+{
+	int draw_buf;
+
+	if (fbdev->buffer_count < 2)
+		return fbdev->mem;
+
+	draw_buf = fbdev->buffer_write;
+	fbdev->buffer_write++;
+	if (fbdev->buffer_write >= fbdev->buffer_count)
+		fbdev->buffer_write = 0;
+
+	fbdev->fbvar_new.yoffset = 
+		(fbdev->top_border + fbdev->fbvar_new.yres + fbdev->bottom_border) * draw_buf +
+		fbdev->top_border;
+
+	ioctl(fbdev->fd, FBIOPAN_DISPLAY, &fbdev->fbvar_new);
+
+	return (char *)fbdev->mem + fbdev->fb_size * fbdev->buffer_write;
+}
+
+void vout_fbdev_wait_vsync(struct vout_fbdev *fbdev)
+{
+	int arg = 0;
+	ioctl(fbdev->fd, FBIO_WAITFORVSYNC, &arg);
+}
+
+/* it is recommended to call vout_fbdev_clear() before this */
+void *vout_fbdev_resize(struct vout_fbdev *fbdev, int w, int h, int bpp,
+		      int left_border, int right_border, int top_border, int bottom_border, int buffer_cnt)
+{
+	int w_total = left_border + w + right_border;
+	int h_total = top_border + h + bottom_border;
+	size_t mem_size;
+	int ret;
+
+	// unblank to be sure the mode is really accepted
+	ioctl(fbdev->fd, FBIOBLANK, FB_BLANK_UNBLANK);
+
+	if (fbdev->fbvar_new.bits_per_pixel != bpp ||
+			fbdev->fbvar_new.xres != w ||
+			fbdev->fbvar_new.yres != h ||
+			fbdev->fbvar_new.xres_virtual != w_total||
+			fbdev->fbvar_new.yres_virtual < h_total ||
+			fbdev->fbvar_new.xoffset != left_border ||
+			fbdev->buffer_count != buffer_cnt)
+	{
+		if (fbdev->fbvar_new.bits_per_pixel != bpp ||
+				w != fbdev->fbvar_new.xres || h != fbdev->fbvar_new.yres)
+			printf(PFX "switching to %dx%d@%d\n", w, h, bpp);
+
+		fbdev->fbvar_new.xres = w;
+		fbdev->fbvar_new.yres = h;
+		fbdev->fbvar_new.xres_virtual = w_total;
+		fbdev->fbvar_new.yres_virtual = h_total * buffer_cnt;
+		fbdev->fbvar_new.xoffset = left_border;
+		fbdev->fbvar_new.yoffset = top_border;
+		fbdev->fbvar_new.bits_per_pixel = bpp;
+		fbdev->fbvar_new.nonstd = 0; // can set YUV here on omapfb
+		fbdev->buffer_count = buffer_cnt;
+		fbdev->buffer_write = buffer_cnt > 1 ? 1 : 0;
+
+		// seems to help a bit to avoid glitches
+		vout_fbdev_wait_vsync(fbdev);
+
+		ret = ioctl(fbdev->fd, FBIOPUT_VSCREENINFO, &fbdev->fbvar_new);
+		if (ret == -1) {
+			// retry with no multibuffering
+			fbdev->fbvar_new.yres_virtual = h_total;
+			ret = ioctl(fbdev->fd, FBIOPUT_VSCREENINFO, &fbdev->fbvar_new);
+			if (ret == -1) {
+				perror(PFX "FBIOPUT_VSCREENINFO ioctl");
+				return NULL;
+			}
+			fbdev->buffer_count = 1;
+			fbdev->buffer_write = 0;
+			fprintf(stderr, PFX "Warning: failed to increase virtual resolution, "
+					"multibuffering disabled\n");
+		}
+
+	}
+
+	fbdev->fb_size = w_total * h_total * bpp / 8;
+	fbdev->top_border = top_border;
+	fbdev->bottom_border = bottom_border;
+
+	mem_size = fbdev->fb_size * fbdev->buffer_count;
+	if (fbdev->mem_size >= mem_size)
+		goto out;
+
+	if (fbdev->mem != NULL)
+		munmap(fbdev->mem, fbdev->mem_size);
+
+	fbdev->mem = mmap(0, mem_size, PROT_WRITE|PROT_READ, MAP_SHARED, fbdev->fd, 0);
+	if (fbdev->mem == MAP_FAILED && fbdev->buffer_count > 1) {
+		fprintf(stderr, PFX "Warning: can't map %zd bytes, doublebuffering disabled\n", mem_size);
+		fbdev->buffer_count = 1;
+		fbdev->buffer_write = 0;
+		mem_size = fbdev->fb_size;
+		fbdev->mem = mmap(0, mem_size, PROT_WRITE|PROT_READ, MAP_SHARED, fbdev->fd, 0);
+	}
+	if (fbdev->mem == MAP_FAILED) {
+		fbdev->mem = NULL;
+		fbdev->mem_size = 0;
+		perror(PFX "mmap framebuffer");
+		return NULL;
+	}
+
+	fbdev->mem_size = mem_size;
+
+out:
+	return (char *)fbdev->mem + fbdev->fb_size * fbdev->buffer_write;
+}
+
+void vout_fbdev_clear(struct vout_fbdev *fbdev)
+{
+	memset(fbdev->mem, 0, fbdev->mem_size);
+}
+
+void vout_fbdev_clear_lines(struct vout_fbdev *fbdev, int y, int count)
+{
+	int stride = fbdev->fbvar_new.xres_virtual * fbdev->fbvar_new.bits_per_pixel / 8;
+	int i;
+
+	if (y + count > fbdev->top_border + fbdev->fbvar_new.yres)
+		count = fbdev->top_border + fbdev->fbvar_new.yres - y;
+
+	if (y >= 0 && count > 0)
+		for (i = 0; i < fbdev->buffer_count; i++)
+			memset((char *)fbdev->mem + fbdev->fb_size * i + y * stride, 0, stride * count);
+}
+
+void *vout_fbdev_get_active_mem(struct vout_fbdev *fbdev)
+{
+	int i;
+
+	i = fbdev->buffer_write - 1;
+	if (i < 0)
+		i = fbdev->buffer_count - 1;
+
+	return (char *)fbdev->mem + fbdev->fb_size * i;
+}
+
+int vout_fbdev_get_fd(struct vout_fbdev *fbdev)
+{
+  if (fbdev == NULL) return -1;
+
+  return fbdev->fd;
+}
+
+struct vout_fbdev *vout_fbdev_preinit(int fbdev_fd)
+{
+  struct vout_fbdev *fbdev;
+
+  fbdev = calloc(1, sizeof(*fbdev));
+  if (fbdev == NULL) return NULL;
+
+  fbdev->fd = fbdev_fd;
+
+  return fbdev;
+}
+
+int vout_fbdev_init(struct vout_fbdev *fbdev, int *w, int *h, int bpp, int buffer_cnt)
+{
+  int req_w, req_h;
+  void *pret;
+  int ret;
+
+  ret = ioctl(fbdev->fd, FBIOGET_VSCREENINFO, &fbdev->fbvar_old);
+  if (ret == -1) {
+    perror(PFX "FBIOGET_VSCREENINFO ioctl");
+    return -1;
+  }
+
+  fbdev->fbvar_new = fbdev->fbvar_old;
+
+  req_w = fbdev->fbvar_new.xres;
+  if (*w != 0)
+    req_w = *w;
+  req_h = fbdev->fbvar_new.yres;
+  if (*h != 0)
+    req_h = *h;
+
+  pret = vout_fbdev_resize(fbdev, req_w, req_h, bpp, 0, 0, 0, 0, buffer_cnt);
+  if (pret == NULL)
+    return -1;
+
+  printf(PFX "%ix%i@%d\n", fbdev->fbvar_new.xres,
+         fbdev->fbvar_new.yres, fbdev->fbvar_new.bits_per_pixel);
+  *w = fbdev->fbvar_new.xres;
+  *h = fbdev->fbvar_new.yres;
+
+  memset(fbdev->mem, 0, fbdev->mem_size);
+
+  // some checks
+  ret = 0;
+  ret = ioctl(fbdev->fd, FBIO_WAITFORVSYNC, &ret);
+  if (ret != 0)
+    fprintf(stderr, PFX "Warning: vsync doesn't seem to be supported\n");
+
+  if (fbdev->buffer_count > 1) {
+    fbdev->buffer_write = 0;
+    fbdev->fbvar_new.yoffset = fbdev->fbvar_new.yres * (fbdev->buffer_count - 1);
+    ret = ioctl(fbdev->fd, FBIOPAN_DISPLAY, &fbdev->fbvar_new);
+    if (ret != 0) {
+      fbdev->buffer_count = 1;
+      fprintf(stderr, PFX "Warning: can't pan display, doublebuffering disabled\n");
+    }
+  }
+
+  printf("fbdev initialized.\n");
+  return 0;
+}
+
+void vout_fbdev_release(struct vout_fbdev *fbdev)
+{
+  if (fbdev->mem == NULL) return;
+
+	ioctl(fbdev->fd, FBIOPUT_VSCREENINFO, &fbdev->fbvar_old);
+	if (fbdev->mem != MAP_FAILED)
+		munmap(fbdev->mem, fbdev->mem_size);
+	fbdev->mem = NULL;
+}
+
+int vout_fbdev_save(struct vout_fbdev *fbdev)
+{
+	void *tmp;
+
+	if (fbdev == NULL || fbdev->mem == NULL || fbdev->mem == MAP_FAILED) {
+		fprintf(stderr, PFX "bad args for save\n");
+		return -1;
+	}
+
+	if (fbdev->mem_saved_size < fbdev->mem_size) {
+		tmp = realloc(fbdev->mem_saved, fbdev->mem_size);
+		if (tmp == NULL)
+			return -1;
+		fbdev->mem_saved = tmp;
+	}
+	memcpy(fbdev->mem_saved, fbdev->mem, fbdev->mem_size);
+	fbdev->mem_saved_size = fbdev->mem_size;
+
+	vout_fbdev_release(fbdev);
+	return 0;
+}
+
+int vout_fbdev_restore(struct vout_fbdev *fbdev)
+{
+	int ret;
+
+	if (fbdev == NULL || fbdev->mem != NULL) {
+		fprintf(stderr, PFX "bad args/state for restore\n");
+		return -1;
+	}
+
+	fbdev->mem = mmap(0, fbdev->mem_size, PROT_WRITE|PROT_READ, MAP_SHARED, fbdev->fd, 0);
+	if (fbdev->mem == MAP_FAILED) {
+		perror(PFX "restore: memory restore failed");
+		return -1;
+	}
+	memcpy(fbdev->mem, fbdev->mem_saved, fbdev->mem_size);
+
+	ret = ioctl(fbdev->fd, FBIOPUT_VSCREENINFO, &fbdev->fbvar_new);
+	if (ret == -1) {
+		perror(PFX "restore: FBIOPUT_VSCREENINFO");
+		return -1;
+	}
+
+	return 0;
+}
+
+void vout_fbdev_teardown(struct vout_fbdev* fbdev)
+{
+  if (fbdev == NULL) return;
+
+  if (fbdev->fd >= 0) close(fbdev->fd);
+  fbdev->fd = -1;
+  free(fbdev);
+}

gfx/fbdev.h

@@ -0,0 +1,24 @@
+#ifndef _FBDEV_H
+#define _FBDEV_H
+
+struct vout_fbdev;
+
+struct vout_fbdev *vout_fbdev_preinit(int fbdev_fd);
+int vout_fbdev_init(struct vout_fbdev *fbdev, int *w, int *h, int bpp, int buffer_cnt);
+
+void *vout_fbdev_flip(struct vout_fbdev *fbdev);
+void  vout_fbdev_wait_vsync(struct vout_fbdev *fbdev);
+void *vout_fbdev_resize(struct vout_fbdev *fbdev, int w, int h, int bpp,
+			int left_border, int right_border, int top_border, int bottom_border,
+			int buffer_count);
+void  vout_fbdev_clear(struct vout_fbdev *fbdev);
+void  vout_fbdev_clear_lines(struct vout_fbdev *fbdev, int y, int count);
+int   vout_fbdev_get_fd(struct vout_fbdev *fbdev);
+void *vout_fbdev_get_active_mem(struct vout_fbdev *fbdev);
+int   vout_fbdev_save(struct vout_fbdev *fbdev);
+int   vout_fbdev_restore(struct vout_fbdev *fbdev);
+
+void vout_fbdev_release(struct vout_fbdev *fbdev);
+void vout_fbdev_teardown(struct vout_fbdev* fbdev);
+
+#endif