Re: [Qemu-devel] [PATCH] tc6393xb: non-accelerated FB support

["andrzej zaborowski" <balrogg@gmail.com>]

2008/11/2 Dmitry Baryshkov <dbaryshkov@gmail.com>:
> Signed-off-by: Dmitry Baryshkov <dbaryshkov@gmail.com>
> ---
>  hw/devices.h           |    2 +-
>  hw/tc6393xb.c          |  132 +++++++++++++++++++++++++++++++++++++++++++++++-
>  hw/tc6393xb_template.h |   52 +++++++++++++++++++
>  hw/tosa.c              |    4 +-
>  4 files changed, 187 insertions(+), 3 deletions(-)
>  create mode 100644 hw/tc6393xb_template.h
>
> diff --git a/hw/devices.h b/hw/devices.h
> index 45fead9..e8fed68 100644
> --- a/hw/devices.h
> +++ b/hw/devices.h
> @@ -66,7 +66,7 @@ void tusb6010_power(struct tusb_s *s, int on);
>
>  /* tc6393xb.c */
>  struct tc6393xb_s;
> -struct tc6393xb_s *tc6393xb_init(uint32_t base, qemu_irq irq);
> +struct tc6393xb_s *tc6393xb_init(uint32_t base, qemu_irq irq, DisplayState *ds);
>  void tc6393xb_gpio_out_set(struct tc6393xb_s *s, int line,
>                     qemu_irq handler);
>  qemu_irq *tc6393xb_gpio_in_get(struct tc6393xb_s *s);
> diff --git a/hw/tc6393xb.c b/hw/tc6393xb.c
> index 919a922..e3897ff 100644
> --- a/hw/tc6393xb.c
> +++ b/hw/tc6393xb.c
> @@ -11,6 +11,8 @@
>  #include "pxa.h"
>  #include "devices.h"
>  #include "flash.h"
> +#include "console.h"
> +#include "pixel_ops.h"
>
>  #define        IRQ_TC6393_NAND         0
>  #define        IRQ_TC6393_MMC          1
> @@ -119,6 +121,11 @@ struct tc6393xb_s {
>     uint32_t nand_phys;
>     struct nand_flash_s *flash;
>     struct ecc_state_s ecc;
> +
> +    DisplayState *ds;
> +    QEMUConsole *console;
> +    uint8_t *vram;
> +    uint32_t scr_width, scr_height; /* in pixels */
>  };
>
>  qemu_irq *tc6393xb_gpio_in_get(struct tc6393xb_s *s)
> @@ -395,6 +402,111 @@ static void tc6393xb_nand_writeb(struct tc6393xb_s *s, target_phys_addr_t addr,
>                                        (uint32_t) addr, value & 0xff);
>  }
>
> +#define BITS 8
> +#define PIXEL_WIDTH 8
> +#include "tc6393xb_template.h"
> +#define BITS 15
> +#define PIXEL_WIDTH 16
> +#include "tc6393xb_template.h"
> +#define BITS 16
> +#define PIXEL_WIDTH 16
> +#include "tc6393xb_template.h"
> +#define BITS 24
> +#define PIXEL_WIDTH 32
> +#include "tc6393xb_template.h"
> +#define BITS 32
> +#define PIXEL_WIDTH 32
> +#include "tc6393xb_template.h"
> +
> +static void tc6393xb_draw_graphic(struct tc6393xb_s *s)
> +{
> +    switch (s->ds->depth) {
> +        case 8:
> +            tc6393xb_draw_graphic8(s);
> +            break;
> +        case 15:
> +            tc6393xb_draw_graphic15(s);
> +            break;
> +        case 16:
> +            tc6393xb_draw_graphic16(s);
> +            break;
> +        case 24:
> +            tc6393xb_draw_graphic24(s);
> +            break;
> +        case 32:
> +            tc6393xb_draw_graphic32(s);
> +            break;
> +        default:
> +            printf("tc6393xb: unknown depth %d\n", s->ds->depth);
> +            return;
> +    }
> +
> +    dpy_update(s->ds, 0, 0, s->scr_width, s->scr_height);
> +}
> +
> +#if 0
> +static void tc6393xb_draw_blank(struct tc6393xb_s *s, int full_update)
> +{
> +    int i, w;
> +    uint8_t *d;
> +
> +    if (!full_update)
> +        return;
> +
> +    w = s->scr_width * ((s->ds->depth + 7) >> 3);
> +    d = s->ds->data;
> +    for(i = 0; i < s->scr_height; i++) {
> +        memset(d, 0, w);
> +        d += s->ds->linesize;
> +    }
> +
> +    dpy_update(s->ds, 0, 0, s->scr_width, s->scr_height);
> +}
> +#endif

This assumes in 24bit mode a pixel occupies only 3 bytes (which iirc
is correct) and above PIXEL_WIDTH for 24 bits is set to 32.

> +
> +static void tc6393xb_update_display(void *opaque)
> +{
> +    struct tc6393xb_s *s = opaque;
> +#if 0
> +    int full_update, graphic_mode;
> +#endif
> +
> +    if (s->scr_width == 0 || s->scr_height == 0)
> +        return;
> +
> +#if 0
> +    if (s->ctla & CTLA_FORCE_BLANK)
> +        graphic_mode = GMODE_BLANK;
> +    else
> +        graphic_mode = GMODE_GRAPH;
> +    full_update = 0;
> +    if (graphic_mode != s->graphic_mode) {
> +        s->graphic_mode = graphic_mode;
> +        full_update = 1;
> +    }
> +#endif
> +    if (s->scr_width != s->ds->width || s->scr_height != s->ds->height) {
> +        qemu_console_resize(s->console, s->scr_width, s->scr_height);
> +#if 0
> +        full_update = 1;
> +#endif
> +    }
> +#if 0
> +    switch(graphic_mode) {
> +        case GMODE_GRAPH:
> +            tc6393xb_draw_graphic(s, full_update);
> +            break;
> +        case GMODE_BLANK:
> +        default:
> +            tc6393xb_draw_blank(s, full_update);
> +            break;
> +    }
> +#else
> +            tc6393xb_draw_graphic(s);
> +#endif
> +}

Why's blank mode disabled?

> +
> +
>  static uint32_t tc6393xb_readb(void *opaque, target_phys_addr_t addr) {
>     struct tc6393xb_s *s = opaque;
>     addr -= s->target_base;
> @@ -404,6 +516,8 @@ static uint32_t tc6393xb_readb(void *opaque, target_phys_addr_t addr) {
>             return tc6393xb_scr_readb(s, addr & 0xff);
>         case 1:
>             return tc6393xb_nand_cfg_readb(s, addr & 0xff);
> +        case 0x1000 ... 0x1fff:
> +            return s->vram[addr - 0x100000];
>     };
>
>     if ((addr &~0xff) == s->nand_phys && s->nand_enable) {
> @@ -428,6 +542,9 @@ static void tc6393xb_writeb(void *opaque, target_phys_addr_t addr, uint32_t valu
>         case 1:
>             tc6393xb_nand_cfg_writeb(s, addr & 0xff, value);
>             return;
> +        case 0x1000 ... 0x1fff:
> +            s->vram[addr - 0x100000] = value&0xff;
> +            return;
>     };

IIRC the page size is 0x400 on qemu-system-arm so you could register
this region as RAM, this sould give a speed-up.  The indentation is
strange.

>
>     if ((addr &~0xff) == s->nand_phys && s->nand_enable)
> @@ -465,7 +582,7 @@ static void tc6393xb_writel(void *opaque, target_phys_addr_t addr, uint32_t valu
>     tc6393xb_writeb(opaque, addr + 3, value >> 24);
>  }
>
> -struct tc6393xb_s *tc6393xb_init(uint32_t base, qemu_irq irq)
> +struct tc6393xb_s *tc6393xb_init(uint32_t base, qemu_irq irq, DisplayState *ds)
>  {
>     int iomemtype;
>     struct tc6393xb_s *s;
> @@ -493,6 +610,19 @@ struct tc6393xb_s *tc6393xb_init(uint32_t base, qemu_irq irq)
>                     tc6393xb_writefn, s);
>     cpu_register_physical_memory(s->target_base, 0x200000, iomemtype);
>
> +    if (ds) {
> +        s->ds = ds;
> +        s->vram = qemu_mallocz(0x100000);
> +        s->scr_width = 480;
> +        s->scr_height = 640;
> +        s->console = graphic_console_init(ds,
> +                tc6393xb_update_display,
> +                NULL, /* invalidate */
> +                NULL, /* screen_dump */
> +                NULL, /* text_update */
> +                s);
> +    }
> +
>     return s;
>  }
>  /* vim:set shiftwidth=4 ts=4 et: */
> diff --git a/hw/tc6393xb_template.h b/hw/tc6393xb_template.h
> new file mode 100644
> index 0000000..1e0dcac
> --- /dev/null
> +++ b/hw/tc6393xb_template.h
> @@ -0,0 +1,52 @@
> +/*
> + * Toshiba TC6393XB I/O Controller.
> + * Found in Sharp Zaurus SL-6000 (tosa) or some
> + * Toshiba e-Series PDAs.
> + *
> + * FB support code. Based on G364 fb emulator
> + *
> + * Copyright (c) 2007 Hervé Poussineau
> + *
> + * This program is free software; you can redistribute it and/or
> + * modify it under the terms of the GNU General Public License as
> + * published by the Free Software Foundation; either version 2 of
> + * the License, or (at your option) any later version.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> + * GNU General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program; if not, write to the Free Software
> + * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
> + * MA 02111-1307 USA
> + */
> +
> +static void glue(tc6393xb_draw_graphic, BITS)(struct tc6393xb_s *s)
> +{
> +    int i, j;
> +    int w_display;
> +    uint16_t *data_buffer;
> +    uint8_t *data_display, *dd;
> +
> +    data_buffer = (uint16_t*)s->vram;
> +    w_display = s->scr_width * PIXEL_WIDTH / 8;
> +    data_display = s->ds->data;
> +    for(i = 0; i < s->scr_height; i++) {
> +        dd = data_display;
> +        for (j = 0; j < s->scr_width; j++, dd += PIXEL_WIDTH / 8, data_buffer++) {
> +            uint16_t color = *data_buffer;
> +            *((glue(glue(uint, PIXEL_WIDTH), _t) *)dd) = glue(rgb_to_pixel, BITS)(
> +                           ((color & 0xf800) * 0x108) >> 11,
> +                           ((color & 0x7e0) * 0x41) >> 9,
> +                           ((color & 0x1f) * 0x21) >> 2
> +                           );

This assumes power of two PIXEL_WIDTH (which is power-of-two but
possibly wrongly).
For the RGB565 host case you can possibly use memcpy.

Cheers