source: mainline/uspace/drv/fb/amdm37x_dispc/amdm37x_dispc.c@ a35b458

/*
 * Copyright (c) 2013 Jan Vesely
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/** @addtogroup amdm37x
 * @{
 */
/**
 * @file
 */

#include <align.h>
#include <assert.h>
#include <errno.h>
#include <ddf/log.h>
#include <ddi.h>
#include <as.h>

#include "amdm37x_dispc.h"

#ifndef CONFIG_BFB_BPP
#define CONFIG_BFB_BPP 24
#endif

#ifndef CONFIG_BFB_WIDTH
#define CONFIG_BFB_WIDTH 1024
#endif

#ifndef CONFIG_BFB_HEIGHT
#define CONFIG_BFB_HEIGHT 768
#endif


static errno_t change_mode(visualizer_t *vis, vslmode_t mode);
static errno_t handle_damage(visualizer_t *vs,
    sysarg_t x0, sysarg_t y0, sysarg_t width, sysarg_t height,
    sysarg_t x_offset, sysarg_t y_offset);
static errno_t dummy(visualizer_t *vs)
{
        return EOK;
}

static const visualizer_ops_t amdm37x_dispc_vis_ops = {
        .change_mode = change_mode,
        .handle_damage = handle_damage,
        .claim = dummy,
        .yield = dummy,
        .suspend = dummy,
        .wakeup = dummy,
};

static const struct {
        unsigned bpp;
        pixel2visual_t func;
} pixel2visual_table[] = {
        [VISUAL_INDIRECT_8] = { .bpp = 1, .func = pixel2bgr_323 },
        [VISUAL_RGB_5_5_5_LE] = { .bpp = 2, .func = pixel2rgb_555_le },
        [VISUAL_RGB_5_5_5_BE] = { .bpp = 2, .func = pixel2rgb_555_be },
        [VISUAL_RGB_5_6_5_LE] = { .bpp = 2, .func = pixel2rgb_565_le },
        [VISUAL_RGB_5_6_5_BE] = { .bpp = 2, .func = pixel2rgb_565_be },
        [VISUAL_BGR_8_8_8] = { .bpp = 3, .func = pixel2bgr_888 },
        [VISUAL_RGB_8_8_8] = { .bpp = 3, .func = pixel2rgb_888 },
        [VISUAL_BGR_0_8_8_8] = { .bpp = 4, .func = pixel2rgb_0888 },
        [VISUAL_BGR_8_8_8_0] = { .bpp = 4, .func = pixel2bgr_8880 },
        [VISUAL_ABGR_8_8_8_8] = { .bpp = 4, .func = pixel2abgr_8888 },
        [VISUAL_BGRA_8_8_8_8] = { .bpp = 4, .func = pixel2bgra_8888 },
        [VISUAL_RGB_0_8_8_8] = { .bpp = 4, .func = pixel2rgb_0888 },
        [VISUAL_RGB_8_8_8_0] = { .bpp = 4, .func = pixel2rgb_8880 },
        [VISUAL_ARGB_8_8_8_8] = { .bpp = 4, .func = pixel2argb_8888 },
        [VISUAL_RGBA_8_8_8_8] = { .bpp = 4, .func = pixel2rgba_8888 },
};



static void mode_init(vslmode_list_element_t *mode,
    unsigned width, unsigned height, visual_t visual)
{
        mode->mode.index = 0;
        mode->mode.version = 0;
        mode->mode.refresh_rate = 0;
        mode->mode.screen_aspect.width = width;
        mode->mode.screen_aspect.height = height;
        mode->mode.screen_width = width;
        mode->mode.screen_height = height;
        mode->mode.cell_aspect.width = 1;
        mode->mode.cell_aspect.height = 1;
        mode->mode.cell_visual.pixel_visual = visual;

        link_initialize(&mode->link);

}

errno_t amdm37x_dispc_init(amdm37x_dispc_t *instance, visualizer_t *vis)
{
        assert(instance);
        assert(vis);

        instance->fb_data = NULL;
        instance->size = 0;

        /* Default is 24bpp, use config option if available */
        visual_t visual = VISUAL_BGR_8_8_8;
        switch (CONFIG_BFB_BPP) {
        case 8: visual = VISUAL_INDIRECT_8; break;
        case 16: visual = VISUAL_RGB_5_6_5_LE; break;
        case 24: visual = VISUAL_BGR_8_8_8; break;
        case 32: visual = VISUAL_RGB_8_8_8_0; break;
        default:
                return EINVAL;
        }

        errno_t ret = pio_enable((void*)AMDM37x_DISPC_BASE_ADDRESS,
            AMDM37x_DISPC_SIZE, (void**)&instance->regs);
        if (ret != EOK) {
                return EIO;
        }

        mode_init(&instance->modes[0],
            CONFIG_BFB_WIDTH, CONFIG_BFB_HEIGHT, visual);

        /* Handle vis stuff */
        vis->dev_ctx = instance;
        vis->def_mode_idx = 0;
        vis->ops = amdm37x_dispc_vis_ops;
        list_append(&instance->modes[0].link, &vis->modes);

        return EOK;
};

errno_t amdm37x_dispc_fini(amdm37x_dispc_t *instance)
{
        return EOK;
};

static errno_t amdm37x_dispc_setup_fb(amdm37x_dispc_regs_t *regs,
    unsigned x, unsigned y, unsigned bpp, uint32_t pa)
{
        assert(regs);
        /* Init sequence for dispc is in chapter 7.6.5.1.4 p. 1810,
         * no idea what parts of that work. */

        /* Disable all interrupts */
        regs->irqenable = 0;

        /* Pixel format specifics*/
        uint32_t attrib_pixel_format = 0;
        uint32_t control_data_lanes = 0;
        switch (bpp)
        {
        case 32:
                attrib_pixel_format = AMDM37X_DISPC_GFX_ATTRIBUTES_FORMAT_RGBX;
                control_data_lanes = AMDM37X_DISPC_CONTROL_TFTDATALINES_24B;
                break;
        case 24:
                attrib_pixel_format = AMDM37X_DISPC_GFX_ATTRIBUTES_FORMAT_RGB24;
                control_data_lanes = AMDM37X_DISPC_CONTROL_TFTDATALINES_24B;
                break;
        case 16:
                attrib_pixel_format = AMDM37X_DISPC_GFX_ATTRIBUTES_FORMAT_RGB16;
                control_data_lanes = AMDM37X_DISPC_CONTROL_TFTDATALINES_16B;
                break;
        default:
                return EINVAL;
        }

        /* Prepare sizes */
        const uint32_t size_reg =
            (((x - 1) & AMDM37X_DISPC_SIZE_WIDTH_MASK)
                << AMDM37X_DISPC_SIZE_WIDTH_SHIFT) |
            (((y - 1) & AMDM37X_DISPC_SIZE_HEIGHT_MASK)
                << AMDM37X_DISPC_SIZE_HEIGHT_SHIFT);

        /* modes taken from u-boot, for 1024x768 */
        // TODO replace magic values with actual correct values
//      regs->timing_h = 0x1a4024c9;
//      regs->timing_v = 0x02c00509;
//      regs->pol_freq = 0x00007028;
//      regs->divisor  = 0x00010001;

        /* setup output */
        regs->size_lcd = size_reg;
        regs->size_dig = size_reg;

        /* Nice blue default color */
        regs->default_color[0] = 0x0000ff;
        regs->default_color[1] = 0x0000ff;

        /* Setup control register */
        uint32_t control = 0 |
                AMDM37X_DISPC_CONTROL_PCKFREEENABLE_FLAG |
                (control_data_lanes << AMDM37X_DISPC_CONTROL_TFTDATALINES_SHIFT) |
                AMDM37X_DISPC_CONTROL_GPOUT0_FLAG |
                AMDM37X_DISPC_CONTROL_GPOUT1_FLAG;
        regs->control = control;

        /* No gamma stuff only data */
        uint32_t config = (AMDM37X_DISPC_CONFIG_LOADMODE_DATAEVERYFRAME
                    << AMDM37X_DISPC_CONFIG_LOADMODE_SHIFT);
        regs->config = config;


        /* Set framebuffer base address */
        regs->gfx.ba[0] = pa;
        regs->gfx.ba[1] = pa;
        regs->gfx.position = 0;

        /* Setup fb size */
        regs->gfx.size = size_reg;

        /* Set pixel format */
        uint32_t attribs = 0 |
            (attrib_pixel_format << AMDM37X_DISPC_GFX_ATTRIBUTES_FORMAT_SHIFT);
        regs->gfx.attributes = attribs;

        /* 0x03ff03c0 is the default */
        regs->gfx.fifo_threshold = 0x03ff03c0;
        /* This value should be stride - width, 1 means next pixel i.e.
         * stride == width */
        regs->gfx.row_inc = 1;
        /* number of bytes to next pixel in BPP multiples */
        regs->gfx.pixel_inc = 1;
        /* only used if video is played over fb */
        regs->gfx.window_skip = 0;
        /* Gamma and palette table */
        regs->gfx.table_ba = 0;

        /* enable frame buffer graphics */
        regs->gfx.attributes |= AMDM37X_DISPC_GFX_ATTRIBUTES_ENABLE_FLAG;
        /* Update register values */
        regs->control |= AMDM37X_DISPC_CONTROL_GOLCD_FLAG;
        regs->control |= AMDM37X_DISPC_CONTROL_GODIGITAL_FLAG;
        /* Enable output */
        regs->control |= AMDM37X_DISPC_CONTROL_LCD_ENABLE_FLAG;
        regs->control |= AMDM37X_DISPC_CONTROL_DIGITAL_ENABLE_FLAG;
        return EOK;
}

static errno_t change_mode(visualizer_t *vis, vslmode_t mode)
{
        assert(vis);
        assert(vis->dev_ctx);

        amdm37x_dispc_t *dispc = vis->dev_ctx;
        const visual_t visual = mode.cell_visual.pixel_visual;
        assert((size_t)visual < sizeof(pixel2visual_table) / sizeof(pixel2visual_table[0]));
        const unsigned bpp = pixel2visual_table[visual].bpp;
        pixel2visual_t p2v = pixel2visual_table[visual].func;
        const unsigned x = mode.screen_width;
        const unsigned y = mode.screen_height;
        ddf_log_note("Setting mode: %ux%ux%u\n", x, y, bpp*8);
        const size_t size = ALIGN_UP(x * y * bpp, PAGE_SIZE);
        uintptr_t pa;
        void *buffer = AS_AREA_ANY;
        errno_t ret = dmamem_map_anonymous(size, DMAMEM_4GiB,
            AS_AREA_READ | AS_AREA_WRITE, 0, &pa, &buffer);
        if (ret != EOK) {
                ddf_log_error("Failed to get new FB\n");
                return ret;
        }
        if (dispc->fb_data)
                dmamem_unmap_anonymous(dispc->fb_data);

        dispc->fb_data = buffer;
        amdm37x_dispc_setup_fb(dispc->regs, x, y, bpp *8, (uint32_t)pa);
        dispc->active_fb.idx = mode.index;
        dispc->active_fb.width = x;
        dispc->active_fb.height = y;
        dispc->active_fb.pitch = 0;
        dispc->active_fb.bpp = bpp;
        dispc->active_fb.pixel2visual = p2v;
        dispc->size = size;
        assert(mode.index < 1);

        return EOK;
}

static errno_t handle_damage(visualizer_t *vs,
    sysarg_t x0, sysarg_t y0, sysarg_t width, sysarg_t height,
    sysarg_t x_offset, sysarg_t y_offset)
{
        assert(vs);
        assert(vs->dev_ctx);
        amdm37x_dispc_t *dispc = vs->dev_ctx;
        pixelmap_t *map = &vs->cells;

#define FB_POS(x, y) \
        (((y) * (dispc->active_fb.width + dispc->active_fb.pitch) + (x)) \
            * dispc->active_fb.bpp)
        if (x_offset == 0 && y_offset == 0) {
                /* Faster damage routine ignoring offsets. */
                for (sysarg_t y = y0; y < height + y0; ++y) {
                        pixel_t *pixel = pixelmap_pixel_at(map, x0, y);
                        for (sysarg_t x = x0; x < width + x0; ++x) {
                                dispc->active_fb.pixel2visual(
                                    dispc->fb_data + FB_POS(x, y), *pixel++);
                        }
                }
        } else {
                for (sysarg_t y = y0; y < height + y0; ++y) {
                        for (sysarg_t x = x0; x < width + x0; ++x) {
                                dispc->active_fb.pixel2visual(
                                    dispc->fb_data + FB_POS(x, y),
                                    *pixelmap_pixel_at(map,
                                        (x + x_offset) % map->width,
                                        (y + y_offset) % map->height));
                        }
                }
        }

        return EOK;
}