[PATCH] fbdev: Garbage collect fbdev scrolling acceleration, part 1 (from TODO list)
Thomas Zimmermann
tzimmermann at suse.de
Fri Oct 1 08:21:44 UTC 2021
Hi
Am 30.09.21 um 17:10 schrieb Claudio:
> Scroll acceleration is disabled in fbcon by hard-wiring
> p->scrollmode = SCROLL_REDRAW. Remove the obsolete code in fbcon.c
> and fbdev/core/
>
> Signed-off-by: Claudio Suarez <cssk at net-c.es>
> ---
>
> - This is a task in the TODO list Documentation/gpu/todo.rst
> - The contact in the task is Daniel Vetter. He is/you are in copy.
> - To ease the things and saving time, I did a patch. It is included in this
> message. I can redo it if there is something wrong.
> - I tested it in some configurations.
>
> My plan for new patches in this task:
> - A buch of patches to remove code from drivers: fb_copyarea and related.
> - Simplify the code around fbcon_ops as much as possible to remove the hooks
> as the TODO suggests.
> - Remove fb_copyarea in headers and exported symbols: cfb_copyarea, etc. This
> must be done when all the drivers are changed.
>
> I think that the correct list to ask questions about this
> is linux-fbdev at vger.kernel.org . Is it correct ?
> My question: I can develop the new changes. I can test in two computers/two
> drivers. Is there a way to test the rest of the patches ? I have not hardware
> to test them. Is anyone helping with this? Only regression tests are needed.
> I can test other patches in return.
>
> Thank you.
> Claudio Suarez.
>
> Patch follows:
>
> Documentation/gpu/todo.rst | 13 +-
> drivers/video/fbdev/core/bitblit.c | 16 -
> drivers/video/fbdev/core/fbcon.c | 509 ++------------------------------
> drivers/video/fbdev/core/fbcon.h | 59 ----
> drivers/video/fbdev/core/fbcon_ccw.c | 28 +-
> drivers/video/fbdev/core/fbcon_cw.c | 28 +-
> drivers/video/fbdev/core/fbcon_rotate.h | 9 -
> drivers/video/fbdev/core/fbcon_ud.c | 37 +--
> drivers/video/fbdev/core/tileblit.c | 16 -
> drivers/video/fbdev/skeletonfb.c | 12 +-
> include/linux/fb.h | 2 +-
> 11 files changed, 51 insertions(+), 678 deletions(-)
Nice stats :)
I looked through it and it looks good. Maybe double-check that
everything still builds.
Acked-by: Thomas Zimmermann <tzimmermann at suse.de>
Best regards
Thomas
>
> diff --git a/Documentation/gpu/todo.rst b/Documentation/gpu/todo.rst
> index 12e61869939e..bb1e04bbf4fb 100644
> --- a/Documentation/gpu/todo.rst
> +++ b/Documentation/gpu/todo.rst
> @@ -314,16 +314,19 @@ Level: Advanced
> Garbage collect fbdev scrolling acceleration
> --------------------------------------------
>
> -Scroll acceleration is disabled in fbcon by hard-wiring p->scrollmode =
> -SCROLL_REDRAW. There's a ton of code this will allow us to remove:
> +Scroll acceleration has been disabled in fbcon. Now it works as the old
> +SCROLL_REDRAW mode. A ton of code was removed in fbcon.c and the hook bmove was
> +removed from fbcon_ops.
> +Remaining tasks:
>
> -- lots of code in fbcon.c
> -
> -- a bunch of the hooks in fbcon_ops, maybe the remaining hooks could be called
> +- a bunch of the hooks in fbcon_ops could be removed or simplified by calling
> directly instead of the function table (with a switch on p->rotate)
>
> - fb_copyarea is unused after this, and can be deleted from all drivers
>
> +- after that, fb_copyarea can be deleted from fb_ops in include/linux/fb.h as
> + well as cfb_copyarea
> +
> Note that not all acceleration code can be deleted, since clearing and cursor
> support is still accelerated, which might be good candidates for further
> deletion projects.
> diff --git a/drivers/video/fbdev/core/bitblit.c b/drivers/video/fbdev/core/bitblit.c
> index f98e8f298bc1..01fae2c96965 100644
> --- a/drivers/video/fbdev/core/bitblit.c
> +++ b/drivers/video/fbdev/core/bitblit.c
> @@ -43,21 +43,6 @@ static void update_attr(u8 *dst, u8 *src, int attribute,
> }
> }
>
> -static void bit_bmove(struct vc_data *vc, struct fb_info *info, int sy,
> - int sx, int dy, int dx, int height, int width)
> -{
> - struct fb_copyarea area;
> -
> - area.sx = sx * vc->vc_font.width;
> - area.sy = sy * vc->vc_font.height;
> - area.dx = dx * vc->vc_font.width;
> - area.dy = dy * vc->vc_font.height;
> - area.height = height * vc->vc_font.height;
> - area.width = width * vc->vc_font.width;
> -
> - info->fbops->fb_copyarea(info, &area);
> -}
> -
> static void bit_clear(struct vc_data *vc, struct fb_info *info, int sy,
> int sx, int height, int width)
> {
> @@ -393,7 +378,6 @@ static int bit_update_start(struct fb_info *info)
>
> void fbcon_set_bitops(struct fbcon_ops *ops)
> {
> - ops->bmove = bit_bmove;
> ops->clear = bit_clear;
> ops->putcs = bit_putcs;
> ops->clear_margins = bit_clear_margins;
> diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c
> index 22bb3892f6bd..99ecd9a6d844 100644
> --- a/drivers/video/fbdev/core/fbcon.c
> +++ b/drivers/video/fbdev/core/fbcon.c
> @@ -173,8 +173,6 @@ static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
> int count, int ypos, int xpos);
> static void fbcon_clear_margins(struct vc_data *vc, int bottom_only);
> static void fbcon_cursor(struct vc_data *vc, int mode);
> -static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
> - int height, int width);
> static int fbcon_switch(struct vc_data *vc);
> static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch);
> static void fbcon_set_palette(struct vc_data *vc, const unsigned char *table);
> @@ -182,16 +180,8 @@ static void fbcon_set_palette(struct vc_data *vc, const unsigned char *table);
> /*
> * Internal routines
> */
> -static __inline__ void ywrap_up(struct vc_data *vc, int count);
> -static __inline__ void ywrap_down(struct vc_data *vc, int count);
> -static __inline__ void ypan_up(struct vc_data *vc, int count);
> -static __inline__ void ypan_down(struct vc_data *vc, int count);
> -static void fbcon_bmove_rec(struct vc_data *vc, struct fbcon_display *p, int sy, int sx,
> - int dy, int dx, int height, int width, u_int y_break);
> static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
> int unit);
> -static void fbcon_redraw_move(struct vc_data *vc, struct fbcon_display *p,
> - int line, int count, int dy);
> static void fbcon_modechanged(struct fb_info *info);
> static void fbcon_set_all_vcs(struct fb_info *info);
> static void fbcon_start(void);
> @@ -1135,14 +1125,6 @@ static void fbcon_init(struct vc_data *vc, int init)
>
> ops->graphics = 0;
>
> - /*
> - * No more hw acceleration for fbcon.
> - *
> - * FIXME: Garbage collect all the now dead code after sufficient time
> - * has passed.
> - */
> - p->scrollmode = SCROLL_REDRAW;
> -
> /*
> * ++guenther: console.c:vc_allocate() relies on initializing
> * vc_{cols,rows}, but we must not set those if we are only
> @@ -1229,14 +1211,13 @@ static void fbcon_deinit(struct vc_data *vc)
> * This system is now divided into two levels because of complications
> * caused by hardware scrolling. Top level functions:
> *
> - * fbcon_bmove(), fbcon_clear(), fbcon_putc(), fbcon_clear_margins()
> + * fbcon_clear(), fbcon_putc(), fbcon_clear_margins()
> *
> * handles y values in range [0, scr_height-1] that correspond to real
> * screen positions. y_wrap shift means that first line of bitmap may be
> * anywhere on this display. These functions convert lineoffsets to
> * bitmap offsets and deal with the wrap-around case by splitting blits.
> *
> - * fbcon_bmove_physical_8() -- These functions fast implementations
> * fbcon_clear_physical_8() -- of original fbcon_XXX fns.
> * fbcon_putc_physical_8() -- (font width != 8) may be added later
> *
> @@ -1409,224 +1390,6 @@ static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
> }
> }
>
> -static __inline__ void ywrap_up(struct vc_data *vc, int count)
> -{
> - struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
> - struct fbcon_ops *ops = info->fbcon_par;
> - struct fbcon_display *p = &fb_display[vc->vc_num];
> -
> - p->yscroll += count;
> - if (p->yscroll >= p->vrows) /* Deal with wrap */
> - p->yscroll -= p->vrows;
> - ops->var.xoffset = 0;
> - ops->var.yoffset = p->yscroll * vc->vc_font.height;
> - ops->var.vmode |= FB_VMODE_YWRAP;
> - ops->update_start(info);
> - scrollback_max += count;
> - if (scrollback_max > scrollback_phys_max)
> - scrollback_max = scrollback_phys_max;
> - scrollback_current = 0;
> -}
> -
> -static __inline__ void ywrap_down(struct vc_data *vc, int count)
> -{
> - struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
> - struct fbcon_ops *ops = info->fbcon_par;
> - struct fbcon_display *p = &fb_display[vc->vc_num];
> -
> - p->yscroll -= count;
> - if (p->yscroll < 0) /* Deal with wrap */
> - p->yscroll += p->vrows;
> - ops->var.xoffset = 0;
> - ops->var.yoffset = p->yscroll * vc->vc_font.height;
> - ops->var.vmode |= FB_VMODE_YWRAP;
> - ops->update_start(info);
> - scrollback_max -= count;
> - if (scrollback_max < 0)
> - scrollback_max = 0;
> - scrollback_current = 0;
> -}
> -
> -static __inline__ void ypan_up(struct vc_data *vc, int count)
> -{
> - struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
> - struct fbcon_display *p = &fb_display[vc->vc_num];
> - struct fbcon_ops *ops = info->fbcon_par;
> -
> - p->yscroll += count;
> - if (p->yscroll > p->vrows - vc->vc_rows) {
> - ops->bmove(vc, info, p->vrows - vc->vc_rows,
> - 0, 0, 0, vc->vc_rows, vc->vc_cols);
> - p->yscroll -= p->vrows - vc->vc_rows;
> - }
> -
> - ops->var.xoffset = 0;
> - ops->var.yoffset = p->yscroll * vc->vc_font.height;
> - ops->var.vmode &= ~FB_VMODE_YWRAP;
> - ops->update_start(info);
> - fbcon_clear_margins(vc, 1);
> - scrollback_max += count;
> - if (scrollback_max > scrollback_phys_max)
> - scrollback_max = scrollback_phys_max;
> - scrollback_current = 0;
> -}
> -
> -static __inline__ void ypan_up_redraw(struct vc_data *vc, int t, int count)
> -{
> - struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
> - struct fbcon_ops *ops = info->fbcon_par;
> - struct fbcon_display *p = &fb_display[vc->vc_num];
> -
> - p->yscroll += count;
> -
> - if (p->yscroll > p->vrows - vc->vc_rows) {
> - p->yscroll -= p->vrows - vc->vc_rows;
> - fbcon_redraw_move(vc, p, t + count, vc->vc_rows - count, t);
> - }
> -
> - ops->var.xoffset = 0;
> - ops->var.yoffset = p->yscroll * vc->vc_font.height;
> - ops->var.vmode &= ~FB_VMODE_YWRAP;
> - ops->update_start(info);
> - fbcon_clear_margins(vc, 1);
> - scrollback_max += count;
> - if (scrollback_max > scrollback_phys_max)
> - scrollback_max = scrollback_phys_max;
> - scrollback_current = 0;
> -}
> -
> -static __inline__ void ypan_down(struct vc_data *vc, int count)
> -{
> - struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
> - struct fbcon_display *p = &fb_display[vc->vc_num];
> - struct fbcon_ops *ops = info->fbcon_par;
> -
> - p->yscroll -= count;
> - if (p->yscroll < 0) {
> - ops->bmove(vc, info, 0, 0, p->vrows - vc->vc_rows,
> - 0, vc->vc_rows, vc->vc_cols);
> - p->yscroll += p->vrows - vc->vc_rows;
> - }
> -
> - ops->var.xoffset = 0;
> - ops->var.yoffset = p->yscroll * vc->vc_font.height;
> - ops->var.vmode &= ~FB_VMODE_YWRAP;
> - ops->update_start(info);
> - fbcon_clear_margins(vc, 1);
> - scrollback_max -= count;
> - if (scrollback_max < 0)
> - scrollback_max = 0;
> - scrollback_current = 0;
> -}
> -
> -static __inline__ void ypan_down_redraw(struct vc_data *vc, int t, int count)
> -{
> - struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
> - struct fbcon_ops *ops = info->fbcon_par;
> - struct fbcon_display *p = &fb_display[vc->vc_num];
> -
> - p->yscroll -= count;
> -
> - if (p->yscroll < 0) {
> - p->yscroll += p->vrows - vc->vc_rows;
> - fbcon_redraw_move(vc, p, t, vc->vc_rows - count, t + count);
> - }
> -
> - ops->var.xoffset = 0;
> - ops->var.yoffset = p->yscroll * vc->vc_font.height;
> - ops->var.vmode &= ~FB_VMODE_YWRAP;
> - ops->update_start(info);
> - fbcon_clear_margins(vc, 1);
> - scrollback_max -= count;
> - if (scrollback_max < 0)
> - scrollback_max = 0;
> - scrollback_current = 0;
> -}
> -
> -static void fbcon_redraw_move(struct vc_data *vc, struct fbcon_display *p,
> - int line, int count, int dy)
> -{
> - unsigned short *s = (unsigned short *)
> - (vc->vc_origin + vc->vc_size_row * line);
> -
> - while (count--) {
> - unsigned short *start = s;
> - unsigned short *le = advance_row(s, 1);
> - unsigned short c;
> - int x = 0;
> - unsigned short attr = 1;
> -
> - do {
> - c = scr_readw(s);
> - if (attr != (c & 0xff00)) {
> - attr = c & 0xff00;
> - if (s > start) {
> - fbcon_putcs(vc, start, s - start,
> - dy, x);
> - x += s - start;
> - start = s;
> - }
> - }
> - console_conditional_schedule();
> - s++;
> - } while (s < le);
> - if (s > start)
> - fbcon_putcs(vc, start, s - start, dy, x);
> - console_conditional_schedule();
> - dy++;
> - }
> -}
> -
> -static void fbcon_redraw_blit(struct vc_data *vc, struct fb_info *info,
> - struct fbcon_display *p, int line, int count, int ycount)
> -{
> - int offset = ycount * vc->vc_cols;
> - unsigned short *d = (unsigned short *)
> - (vc->vc_origin + vc->vc_size_row * line);
> - unsigned short *s = d + offset;
> - struct fbcon_ops *ops = info->fbcon_par;
> -
> - while (count--) {
> - unsigned short *start = s;
> - unsigned short *le = advance_row(s, 1);
> - unsigned short c;
> - int x = 0;
> -
> - do {
> - c = scr_readw(s);
> -
> - if (c == scr_readw(d)) {
> - if (s > start) {
> - ops->bmove(vc, info, line + ycount, x,
> - line, x, 1, s-start);
> - x += s - start + 1;
> - start = s + 1;
> - } else {
> - x++;
> - start++;
> - }
> - }
> -
> - scr_writew(c, d);
> - console_conditional_schedule();
> - s++;
> - d++;
> - } while (s < le);
> - if (s > start)
> - ops->bmove(vc, info, line + ycount, x, line, x, 1,
> - s-start);
> - console_conditional_schedule();
> - if (ycount > 0)
> - line++;
> - else {
> - line--;
> - /* NOTE: We subtract two lines from these pointers */
> - s -= vc->vc_size_row;
> - d -= vc->vc_size_row;
> - }
> - }
> -}
> -
> static void fbcon_redraw(struct vc_data *vc, struct fbcon_display *p,
> int line, int count, int offset)
> {
> @@ -1687,7 +1450,6 @@ static bool fbcon_scroll(struct vc_data *vc, unsigned int t, unsigned int b,
> {
> struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
> struct fbcon_display *p = &fb_display[vc->vc_num];
> - int scroll_partial = info->flags & FBINFO_PARTIAL_PAN_OK;
>
> if (fbcon_is_inactive(vc, info))
> return true;
> @@ -1704,249 +1466,32 @@ static bool fbcon_scroll(struct vc_data *vc, unsigned int t, unsigned int b,
> case SM_UP:
> if (count > vc->vc_rows) /* Maximum realistic size */
> count = vc->vc_rows;
> - if (logo_shown >= 0)
> - goto redraw_up;
> - switch (p->scrollmode) {
> - case SCROLL_MOVE:
> - fbcon_redraw_blit(vc, info, p, t, b - t - count,
> - count);
> - fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
> - scr_memsetw((unsigned short *) (vc->vc_origin +
> - vc->vc_size_row *
> - (b - count)),
> - vc->vc_video_erase_char,
> - vc->vc_size_row * count);
> - return true;
> -
> - case SCROLL_WRAP_MOVE:
> - if (b - t - count > 3 * vc->vc_rows >> 2) {
> - if (t > 0)
> - fbcon_bmove(vc, 0, 0, count, 0, t,
> - vc->vc_cols);
> - ywrap_up(vc, count);
> - if (vc->vc_rows - b > 0)
> - fbcon_bmove(vc, b - count, 0, b, 0,
> - vc->vc_rows - b,
> - vc->vc_cols);
> - } else if (info->flags & FBINFO_READS_FAST)
> - fbcon_bmove(vc, t + count, 0, t, 0,
> - b - t - count, vc->vc_cols);
> - else
> - goto redraw_up;
> - fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
> - break;
> -
> - case SCROLL_PAN_REDRAW:
> - if ((p->yscroll + count <=
> - 2 * (p->vrows - vc->vc_rows))
> - && ((!scroll_partial && (b - t == vc->vc_rows))
> - || (scroll_partial
> - && (b - t - count >
> - 3 * vc->vc_rows >> 2)))) {
> - if (t > 0)
> - fbcon_redraw_move(vc, p, 0, t, count);
> - ypan_up_redraw(vc, t, count);
> - if (vc->vc_rows - b > 0)
> - fbcon_redraw_move(vc, p, b,
> - vc->vc_rows - b, b);
> - } else
> - fbcon_redraw_move(vc, p, t + count, b - t - count, t);
> - fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
> - break;
> -
> - case SCROLL_PAN_MOVE:
> - if ((p->yscroll + count <=
> - 2 * (p->vrows - vc->vc_rows))
> - && ((!scroll_partial && (b - t == vc->vc_rows))
> - || (scroll_partial
> - && (b - t - count >
> - 3 * vc->vc_rows >> 2)))) {
> - if (t > 0)
> - fbcon_bmove(vc, 0, 0, count, 0, t,
> - vc->vc_cols);
> - ypan_up(vc, count);
> - if (vc->vc_rows - b > 0)
> - fbcon_bmove(vc, b - count, 0, b, 0,
> - vc->vc_rows - b,
> - vc->vc_cols);
> - } else if (info->flags & FBINFO_READS_FAST)
> - fbcon_bmove(vc, t + count, 0, t, 0,
> - b - t - count, vc->vc_cols);
> - else
> - goto redraw_up;
> - fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
> - break;
> -
> - case SCROLL_REDRAW:
> - redraw_up:
> - fbcon_redraw(vc, p, t, b - t - count,
> - count * vc->vc_cols);
> - fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
> - scr_memsetw((unsigned short *) (vc->vc_origin +
> - vc->vc_size_row *
> - (b - count)),
> - vc->vc_video_erase_char,
> - vc->vc_size_row * count);
> - return true;
> - }
> - break;
> + fbcon_redraw(vc, p, t, b - t - count,
> + count * vc->vc_cols);
> + fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
> + scr_memsetw((unsigned short *) (vc->vc_origin +
> + vc->vc_size_row *
> + (b - count)),
> + vc->vc_video_erase_char,
> + vc->vc_size_row * count);
> + return true;
>
> case SM_DOWN:
> if (count > vc->vc_rows) /* Maximum realistic size */
> count = vc->vc_rows;
> - if (logo_shown >= 0)
> - goto redraw_down;
> - switch (p->scrollmode) {
> - case SCROLL_MOVE:
> - fbcon_redraw_blit(vc, info, p, b - 1, b - t - count,
> - -count);
> - fbcon_clear(vc, t, 0, count, vc->vc_cols);
> - scr_memsetw((unsigned short *) (vc->vc_origin +
> - vc->vc_size_row *
> - t),
> - vc->vc_video_erase_char,
> - vc->vc_size_row * count);
> - return true;
> -
> - case SCROLL_WRAP_MOVE:
> - if (b - t - count > 3 * vc->vc_rows >> 2) {
> - if (vc->vc_rows - b > 0)
> - fbcon_bmove(vc, b, 0, b - count, 0,
> - vc->vc_rows - b,
> - vc->vc_cols);
> - ywrap_down(vc, count);
> - if (t > 0)
> - fbcon_bmove(vc, count, 0, 0, 0, t,
> - vc->vc_cols);
> - } else if (info->flags & FBINFO_READS_FAST)
> - fbcon_bmove(vc, t, 0, t + count, 0,
> - b - t - count, vc->vc_cols);
> - else
> - goto redraw_down;
> - fbcon_clear(vc, t, 0, count, vc->vc_cols);
> - break;
> -
> - case SCROLL_PAN_MOVE:
> - if ((count - p->yscroll <= p->vrows - vc->vc_rows)
> - && ((!scroll_partial && (b - t == vc->vc_rows))
> - || (scroll_partial
> - && (b - t - count >
> - 3 * vc->vc_rows >> 2)))) {
> - if (vc->vc_rows - b > 0)
> - fbcon_bmove(vc, b, 0, b - count, 0,
> - vc->vc_rows - b,
> - vc->vc_cols);
> - ypan_down(vc, count);
> - if (t > 0)
> - fbcon_bmove(vc, count, 0, 0, 0, t,
> - vc->vc_cols);
> - } else if (info->flags & FBINFO_READS_FAST)
> - fbcon_bmove(vc, t, 0, t + count, 0,
> - b - t - count, vc->vc_cols);
> - else
> - goto redraw_down;
> - fbcon_clear(vc, t, 0, count, vc->vc_cols);
> - break;
> -
> - case SCROLL_PAN_REDRAW:
> - if ((count - p->yscroll <= p->vrows - vc->vc_rows)
> - && ((!scroll_partial && (b - t == vc->vc_rows))
> - || (scroll_partial
> - && (b - t - count >
> - 3 * vc->vc_rows >> 2)))) {
> - if (vc->vc_rows - b > 0)
> - fbcon_redraw_move(vc, p, b, vc->vc_rows - b,
> - b - count);
> - ypan_down_redraw(vc, t, count);
> - if (t > 0)
> - fbcon_redraw_move(vc, p, count, t, 0);
> - } else
> - fbcon_redraw_move(vc, p, t, b - t - count, t + count);
> - fbcon_clear(vc, t, 0, count, vc->vc_cols);
> - break;
> -
> - case SCROLL_REDRAW:
> - redraw_down:
> - fbcon_redraw(vc, p, b - 1, b - t - count,
> - -count * vc->vc_cols);
> - fbcon_clear(vc, t, 0, count, vc->vc_cols);
> - scr_memsetw((unsigned short *) (vc->vc_origin +
> - vc->vc_size_row *
> - t),
> - vc->vc_video_erase_char,
> - vc->vc_size_row * count);
> - return true;
> - }
> + fbcon_redraw(vc, p, b - 1, b - t - count,
> + -count * vc->vc_cols);
> + fbcon_clear(vc, t, 0, count, vc->vc_cols);
> + scr_memsetw((unsigned short *) (vc->vc_origin +
> + vc->vc_size_row *
> + t),
> + vc->vc_video_erase_char,
> + vc->vc_size_row * count);
> + return true;
> }
> return false;
> }
>
> -
> -static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
> - int height, int width)
> -{
> - struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
> - struct fbcon_display *p = &fb_display[vc->vc_num];
> -
> - if (fbcon_is_inactive(vc, info))
> - return;
> -
> - if (!width || !height)
> - return;
> -
> - /* Split blits that cross physical y_wrap case.
> - * Pathological case involves 4 blits, better to use recursive
> - * code rather than unrolled case
> - *
> - * Recursive invocations don't need to erase the cursor over and
> - * over again, so we use fbcon_bmove_rec()
> - */
> - fbcon_bmove_rec(vc, p, sy, sx, dy, dx, height, width,
> - p->vrows - p->yscroll);
> -}
> -
> -static void fbcon_bmove_rec(struct vc_data *vc, struct fbcon_display *p, int sy, int sx,
> - int dy, int dx, int height, int width, u_int y_break)
> -{
> - struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
> - struct fbcon_ops *ops = info->fbcon_par;
> - u_int b;
> -
> - if (sy < y_break && sy + height > y_break) {
> - b = y_break - sy;
> - if (dy < sy) { /* Avoid trashing self */
> - fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
> - y_break);
> - fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
> - height - b, width, y_break);
> - } else {
> - fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
> - height - b, width, y_break);
> - fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
> - y_break);
> - }
> - return;
> - }
> -
> - if (dy < y_break && dy + height > y_break) {
> - b = y_break - dy;
> - if (dy < sy) { /* Avoid trashing self */
> - fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
> - y_break);
> - fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
> - height - b, width, y_break);
> - } else {
> - fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
> - height - b, width, y_break);
> - fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
> - y_break);
> - }
> - return;
> - }
> - ops->bmove(vc, info, real_y(p, sy), sx, real_y(p, dy), dx,
> - height, width);
> -}
> -
> static void updatescrollmode(struct fbcon_display *p,
> struct fb_info *info,
> struct vc_data *vc)
> @@ -2119,21 +1664,7 @@ static int fbcon_switch(struct vc_data *vc)
>
> updatescrollmode(p, info, vc);
>
> - switch (p->scrollmode) {
> - case SCROLL_WRAP_MOVE:
> - scrollback_phys_max = p->vrows - vc->vc_rows;
> - break;
> - case SCROLL_PAN_MOVE:
> - case SCROLL_PAN_REDRAW:
> - scrollback_phys_max = p->vrows - 2 * vc->vc_rows;
> - if (scrollback_phys_max < 0)
> - scrollback_phys_max = 0;
> - break;
> - default:
> - scrollback_phys_max = 0;
> - break;
> - }
> -
> + scrollback_phys_max = 0;
> scrollback_max = 0;
> scrollback_current = 0;
>
> diff --git a/drivers/video/fbdev/core/fbcon.h b/drivers/video/fbdev/core/fbcon.h
> index 9315b360c898..a00603b4451a 100644
> --- a/drivers/video/fbdev/core/fbcon.h
> +++ b/drivers/video/fbdev/core/fbcon.h
> @@ -29,7 +29,6 @@ struct fbcon_display {
> /* Filled in by the low-level console driver */
> const u_char *fontdata;
> int userfont; /* != 0 if fontdata kmalloc()ed */
> - u_short scrollmode; /* Scroll Method */
> u_short inverse; /* != 0 text black on white as default */
> short yscroll; /* Hardware scrolling */
> int vrows; /* number of virtual rows */
> @@ -52,8 +51,6 @@ struct fbcon_display {
> };
>
> struct fbcon_ops {
> - void (*bmove)(struct vc_data *vc, struct fb_info *info, int sy,
> - int sx, int dy, int dx, int height, int width);
> void (*clear)(struct vc_data *vc, struct fb_info *info, int sy,
> int sx, int height, int width);
> void (*putcs)(struct vc_data *vc, struct fb_info *info,
> @@ -152,62 +149,6 @@ static inline int attr_col_ec(int shift, struct vc_data *vc,
> #define attr_bgcol_ec(bgshift, vc, info) attr_col_ec(bgshift, vc, info, 0)
> #define attr_fgcol_ec(fgshift, vc, info) attr_col_ec(fgshift, vc, info, 1)
>
> - /*
> - * Scroll Method
> - */
> -
> -/* There are several methods fbcon can use to move text around the screen:
> - *
> - * Operation Pan Wrap
> - *---------------------------------------------
> - * SCROLL_MOVE copyarea No No
> - * SCROLL_PAN_MOVE copyarea Yes No
> - * SCROLL_WRAP_MOVE copyarea No Yes
> - * SCROLL_REDRAW imageblit No No
> - * SCROLL_PAN_REDRAW imageblit Yes No
> - * SCROLL_WRAP_REDRAW imageblit No Yes
> - *
> - * (SCROLL_WRAP_REDRAW is not implemented yet)
> - *
> - * In general, fbcon will choose the best scrolling
> - * method based on the rule below:
> - *
> - * Pan/Wrap > accel imageblit > accel copyarea >
> - * soft imageblit > (soft copyarea)
> - *
> - * Exception to the rule: Pan + accel copyarea is
> - * preferred over Pan + accel imageblit.
> - *
> - * The above is typical for PCI/AGP cards. Unless
> - * overridden, fbcon will never use soft copyarea.
> - *
> - * If you need to override the above rule, set the
> - * appropriate flags in fb_info->flags. For example,
> - * to prefer copyarea over imageblit, set
> - * FBINFO_READS_FAST.
> - *
> - * Other notes:
> - * + use the hardware engine to move the text
> - * (hw-accelerated copyarea() and fillrect())
> - * + use hardware-supported panning on a large virtual screen
> - * + amifb can not only pan, but also wrap the display by N lines
> - * (i.e. visible line i = physical line (i+N) % yres).
> - * + read what's already rendered on the screen and
> - * write it in a different place (this is cfb_copyarea())
> - * + re-render the text to the screen
> - *
> - * Whether to use wrapping or panning can only be figured out at
> - * runtime (when we know whether our font height is a multiple
> - * of the pan/wrap step)
> - *
> - */
> -
> -#define SCROLL_MOVE 0x001
> -#define SCROLL_PAN_MOVE 0x002
> -#define SCROLL_WRAP_MOVE 0x003
> -#define SCROLL_REDRAW 0x004
> -#define SCROLL_PAN_REDRAW 0x005
> -
> #ifdef CONFIG_FB_TILEBLITTING
> extern void fbcon_set_tileops(struct vc_data *vc, struct fb_info *info);
> #endif
> diff --git a/drivers/video/fbdev/core/fbcon_ccw.c b/drivers/video/fbdev/core/fbcon_ccw.c
> index 9cd2c4b05c32..ffa78936eaab 100644
> --- a/drivers/video/fbdev/core/fbcon_ccw.c
> +++ b/drivers/video/fbdev/core/fbcon_ccw.c
> @@ -59,31 +59,12 @@ static void ccw_update_attr(u8 *dst, u8 *src, int attribute,
> }
> }
>
> -
> -static void ccw_bmove(struct vc_data *vc, struct fb_info *info, int sy,
> - int sx, int dy, int dx, int height, int width)
> -{
> - struct fbcon_ops *ops = info->fbcon_par;
> - struct fb_copyarea area;
> - u32 vyres = GETVYRES(ops->p->scrollmode, info);
> -
> - area.sx = sy * vc->vc_font.height;
> - area.sy = vyres - ((sx + width) * vc->vc_font.width);
> - area.dx = dy * vc->vc_font.height;
> - area.dy = vyres - ((dx + width) * vc->vc_font.width);
> - area.width = height * vc->vc_font.height;
> - area.height = width * vc->vc_font.width;
> -
> - info->fbops->fb_copyarea(info, &area);
> -}
> -
> static void ccw_clear(struct vc_data *vc, struct fb_info *info, int sy,
> int sx, int height, int width)
> {
> - struct fbcon_ops *ops = info->fbcon_par;
> struct fb_fillrect region;
> int bgshift = (vc->vc_hi_font_mask) ? 13 : 12;
> - u32 vyres = GETVYRES(ops->p->scrollmode, info);
> + u32 vyres = info->var.yres;
>
> region.color = attr_bgcol_ec(bgshift,vc,info);
> region.dx = sy * vc->vc_font.height;
> @@ -140,7 +121,7 @@ static void ccw_putcs(struct vc_data *vc, struct fb_info *info,
> u32 cnt, pitch, size;
> u32 attribute = get_attribute(info, scr_readw(s));
> u8 *dst, *buf = NULL;
> - u32 vyres = GETVYRES(ops->p->scrollmode, info);
> + u32 vyres = info->var.yres;
>
> if (!ops->fontbuffer)
> return;
> @@ -229,7 +210,7 @@ static void ccw_cursor(struct vc_data *vc, struct fb_info *info, int mode,
> int attribute, use_sw = vc->vc_cursor_type & CUR_SW;
> int err = 1, dx, dy;
> char *src;
> - u32 vyres = GETVYRES(ops->p->scrollmode, info);
> + u32 vyres = info->var.yres;
>
> if (!ops->fontbuffer)
> return;
> @@ -387,7 +368,7 @@ static int ccw_update_start(struct fb_info *info)
> {
> struct fbcon_ops *ops = info->fbcon_par;
> u32 yoffset;
> - u32 vyres = GETVYRES(ops->p->scrollmode, info);
> + u32 vyres = info->var.yres;
> int err;
>
> yoffset = (vyres - info->var.yres) - ops->var.xoffset;
> @@ -402,7 +383,6 @@ static int ccw_update_start(struct fb_info *info)
>
> void fbcon_rotate_ccw(struct fbcon_ops *ops)
> {
> - ops->bmove = ccw_bmove;
> ops->clear = ccw_clear;
> ops->putcs = ccw_putcs;
> ops->clear_margins = ccw_clear_margins;
> diff --git a/drivers/video/fbdev/core/fbcon_cw.c b/drivers/video/fbdev/core/fbcon_cw.c
> index 88d89fad3f05..92e5b7fb51ee 100644
> --- a/drivers/video/fbdev/core/fbcon_cw.c
> +++ b/drivers/video/fbdev/core/fbcon_cw.c
> @@ -44,31 +44,12 @@ static void cw_update_attr(u8 *dst, u8 *src, int attribute,
> }
> }
>
> -
> -static void cw_bmove(struct vc_data *vc, struct fb_info *info, int sy,
> - int sx, int dy, int dx, int height, int width)
> -{
> - struct fbcon_ops *ops = info->fbcon_par;
> - struct fb_copyarea area;
> - u32 vxres = GETVXRES(ops->p->scrollmode, info);
> -
> - area.sx = vxres - ((sy + height) * vc->vc_font.height);
> - area.sy = sx * vc->vc_font.width;
> - area.dx = vxres - ((dy + height) * vc->vc_font.height);
> - area.dy = dx * vc->vc_font.width;
> - area.width = height * vc->vc_font.height;
> - area.height = width * vc->vc_font.width;
> -
> - info->fbops->fb_copyarea(info, &area);
> -}
> -
> static void cw_clear(struct vc_data *vc, struct fb_info *info, int sy,
> int sx, int height, int width)
> {
> - struct fbcon_ops *ops = info->fbcon_par;
> struct fb_fillrect region;
> int bgshift = (vc->vc_hi_font_mask) ? 13 : 12;
> - u32 vxres = GETVXRES(ops->p->scrollmode, info);
> + u32 vxres = info->var.xres;
>
> region.color = attr_bgcol_ec(bgshift,vc,info);
> region.dx = vxres - ((sy + height) * vc->vc_font.height);
> @@ -125,7 +106,7 @@ static void cw_putcs(struct vc_data *vc, struct fb_info *info,
> u32 cnt, pitch, size;
> u32 attribute = get_attribute(info, scr_readw(s));
> u8 *dst, *buf = NULL;
> - u32 vxres = GETVXRES(ops->p->scrollmode, info);
> + u32 vxres = info->var.xres;
>
> if (!ops->fontbuffer)
> return;
> @@ -212,7 +193,7 @@ static void cw_cursor(struct vc_data *vc, struct fb_info *info, int mode,
> int attribute, use_sw = vc->vc_cursor_type & CUR_SW;
> int err = 1, dx, dy;
> char *src;
> - u32 vxres = GETVXRES(ops->p->scrollmode, info);
> + u32 vxres = info->var.xres;
>
> if (!ops->fontbuffer)
> return;
> @@ -369,7 +350,7 @@ static void cw_cursor(struct vc_data *vc, struct fb_info *info, int mode,
> static int cw_update_start(struct fb_info *info)
> {
> struct fbcon_ops *ops = info->fbcon_par;
> - u32 vxres = GETVXRES(ops->p->scrollmode, info);
> + u32 vxres = info->var.xres;
> u32 xoffset;
> int err;
>
> @@ -385,7 +366,6 @@ static int cw_update_start(struct fb_info *info)
>
> void fbcon_rotate_cw(struct fbcon_ops *ops)
> {
> - ops->bmove = cw_bmove;
> ops->clear = cw_clear;
> ops->putcs = cw_putcs;
> ops->clear_margins = cw_clear_margins;
> diff --git a/drivers/video/fbdev/core/fbcon_rotate.h b/drivers/video/fbdev/core/fbcon_rotate.h
> index e233444cda66..b528b2e54283 100644
> --- a/drivers/video/fbdev/core/fbcon_rotate.h
> +++ b/drivers/video/fbdev/core/fbcon_rotate.h
> @@ -11,15 +11,6 @@
> #ifndef _FBCON_ROTATE_H
> #define _FBCON_ROTATE_H
>
> -#define GETVYRES(s,i) ({ \
> - (s == SCROLL_REDRAW || s == SCROLL_MOVE) ? \
> - (i)->var.yres : (i)->var.yres_virtual; })
> -
> -#define GETVXRES(s,i) ({ \
> - (s == SCROLL_REDRAW || s == SCROLL_MOVE || !(i)->fix.xpanstep) ? \
> - (i)->var.xres : (i)->var.xres_virtual; })
> -
> -
> static inline int pattern_test_bit(u32 x, u32 y, u32 pitch, const char *pat)
> {
> u32 tmp = (y * pitch) + x, index = tmp / 8, bit = tmp % 8;
> diff --git a/drivers/video/fbdev/core/fbcon_ud.c b/drivers/video/fbdev/core/fbcon_ud.c
> index 8d5e66b1bdfb..09619bd8e021 100644
> --- a/drivers/video/fbdev/core/fbcon_ud.c
> +++ b/drivers/video/fbdev/core/fbcon_ud.c
> @@ -44,33 +44,13 @@ static void ud_update_attr(u8 *dst, u8 *src, int attribute,
> }
> }
>
> -
> -static void ud_bmove(struct vc_data *vc, struct fb_info *info, int sy,
> - int sx, int dy, int dx, int height, int width)
> -{
> - struct fbcon_ops *ops = info->fbcon_par;
> - struct fb_copyarea area;
> - u32 vyres = GETVYRES(ops->p->scrollmode, info);
> - u32 vxres = GETVXRES(ops->p->scrollmode, info);
> -
> - area.sy = vyres - ((sy + height) * vc->vc_font.height);
> - area.sx = vxres - ((sx + width) * vc->vc_font.width);
> - area.dy = vyres - ((dy + height) * vc->vc_font.height);
> - area.dx = vxres - ((dx + width) * vc->vc_font.width);
> - area.height = height * vc->vc_font.height;
> - area.width = width * vc->vc_font.width;
> -
> - info->fbops->fb_copyarea(info, &area);
> -}
> -
> static void ud_clear(struct vc_data *vc, struct fb_info *info, int sy,
> int sx, int height, int width)
> {
> - struct fbcon_ops *ops = info->fbcon_par;
> struct fb_fillrect region;
> int bgshift = (vc->vc_hi_font_mask) ? 13 : 12;
> - u32 vyres = GETVYRES(ops->p->scrollmode, info);
> - u32 vxres = GETVXRES(ops->p->scrollmode, info);
> + u32 vyres = info->var.yres;
> + u32 vxres = info->var.xres;
>
> region.color = attr_bgcol_ec(bgshift,vc,info);
> region.dy = vyres - ((sy + height) * vc->vc_font.height);
> @@ -162,8 +142,8 @@ static void ud_putcs(struct vc_data *vc, struct fb_info *info,
> u32 mod = vc->vc_font.width % 8, cnt, pitch, size;
> u32 attribute = get_attribute(info, scr_readw(s));
> u8 *dst, *buf = NULL;
> - u32 vyres = GETVYRES(ops->p->scrollmode, info);
> - u32 vxres = GETVXRES(ops->p->scrollmode, info);
> + u32 vyres = info->var.yres;
> + u32 vxres = info->var.xres;
>
> if (!ops->fontbuffer)
> return;
> @@ -259,8 +239,8 @@ static void ud_cursor(struct vc_data *vc, struct fb_info *info, int mode,
> int attribute, use_sw = vc->vc_cursor_type & CUR_SW;
> int err = 1, dx, dy;
> char *src;
> - u32 vyres = GETVYRES(ops->p->scrollmode, info);
> - u32 vxres = GETVXRES(ops->p->scrollmode, info);
> + u32 vyres = info->var.yres;
> + u32 vxres = info->var.xres;
>
> if (!ops->fontbuffer)
> return;
> @@ -410,8 +390,8 @@ static int ud_update_start(struct fb_info *info)
> {
> struct fbcon_ops *ops = info->fbcon_par;
> int xoffset, yoffset;
> - u32 vyres = GETVYRES(ops->p->scrollmode, info);
> - u32 vxres = GETVXRES(ops->p->scrollmode, info);
> + u32 vyres = info->var.yres;
> + u32 vxres = info->var.xres;
> int err;
>
> xoffset = vxres - info->var.xres - ops->var.xoffset;
> @@ -429,7 +409,6 @@ static int ud_update_start(struct fb_info *info)
>
> void fbcon_rotate_ud(struct fbcon_ops *ops)
> {
> - ops->bmove = ud_bmove;
> ops->clear = ud_clear;
> ops->putcs = ud_putcs;
> ops->clear_margins = ud_clear_margins;
> diff --git a/drivers/video/fbdev/core/tileblit.c b/drivers/video/fbdev/core/tileblit.c
> index 2768eff247ba..72af95053bcb 100644
> --- a/drivers/video/fbdev/core/tileblit.c
> +++ b/drivers/video/fbdev/core/tileblit.c
> @@ -16,21 +16,6 @@
> #include <asm/types.h>
> #include "fbcon.h"
>
> -static void tile_bmove(struct vc_data *vc, struct fb_info *info, int sy,
> - int sx, int dy, int dx, int height, int width)
> -{
> - struct fb_tilearea area;
> -
> - area.sx = sx;
> - area.sy = sy;
> - area.dx = dx;
> - area.dy = dy;
> - area.height = height;
> - area.width = width;
> -
> - info->tileops->fb_tilecopy(info, &area);
> -}
> -
> static void tile_clear(struct vc_data *vc, struct fb_info *info, int sy,
> int sx, int height, int width)
> {
> @@ -133,7 +118,6 @@ void fbcon_set_tileops(struct vc_data *vc, struct fb_info *info)
> struct fb_tilemap map;
> struct fbcon_ops *ops = info->fbcon_par;
>
> - ops->bmove = tile_bmove;
> ops->clear = tile_clear;
> ops->putcs = tile_putcs;
> ops->clear_margins = tile_clear_margins;
> diff --git a/drivers/video/fbdev/skeletonfb.c b/drivers/video/fbdev/skeletonfb.c
> index bcacfb6934fa..0fe922f726e9 100644
> --- a/drivers/video/fbdev/skeletonfb.c
> +++ b/drivers/video/fbdev/skeletonfb.c
> @@ -505,15 +505,15 @@ void xxxfb_fillrect(struct fb_info *p, const struct fb_fillrect *region)
> }
>
> /**
> - * xxxfb_copyarea - REQUIRED function. Can use generic routines if
> - * non acclerated hardware and packed pixel based.
> + * xxxfb_copyarea - OBSOLETE function.
> * Copies one area of the screen to another area.
> + * Will be deleted in a future version
> *
> * @info: frame buffer structure that represents a single frame buffer
> * @area: Structure providing the data to copy the framebuffer contents
> * from one region to another.
> *
> - * This drawing operation copies a rectangular area from one area of the
> + * This drawing operation copied a rectangular area from one area of the
> * screen to another area.
> */
> void xxxfb_copyarea(struct fb_info *p, const struct fb_copyarea *area)
> @@ -645,9 +645,9 @@ static const struct fb_ops xxxfb_ops = {
> .fb_setcolreg = xxxfb_setcolreg,
> .fb_blank = xxxfb_blank,
> .fb_pan_display = xxxfb_pan_display,
> - .fb_fillrect = xxxfb_fillrect, /* Needed !!! */
> - .fb_copyarea = xxxfb_copyarea, /* Needed !!! */
> - .fb_imageblit = xxxfb_imageblit, /* Needed !!! */
> + .fb_fillrect = xxxfb_fillrect, /* Needed !!! */
> + .fb_copyarea = xxxfb_copyarea, /* Obsolete */
> + .fb_imageblit = xxxfb_imageblit, /* Needed !!! */
> .fb_cursor = xxxfb_cursor, /* Optional !!! */
> .fb_sync = xxxfb_sync,
> .fb_ioctl = xxxfb_ioctl,
> diff --git a/include/linux/fb.h b/include/linux/fb.h
> index 5950f8f5dc74..6f3db99ab990 100644
> --- a/include/linux/fb.h
> +++ b/include/linux/fb.h
> @@ -262,7 +262,7 @@ struct fb_ops {
>
> /* Draws a rectangle */
> void (*fb_fillrect) (struct fb_info *info, const struct fb_fillrect *rect);
> - /* Copy data from area to another */
> + /* Copy data from area to another. Obsolete. */
> void (*fb_copyarea) (struct fb_info *info, const struct fb_copyarea *region);
> /* Draws a image to the display */
> void (*fb_imageblit) (struct fb_info *info, const struct fb_image *image);
>
>
>
--
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Maxfeldstr. 5, 90409 Nürnberg, Germany
(HRB 36809, AG Nürnberg)
Geschäftsführer: Felix Imendörffer
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