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      1 /*
      2  * Copyright 2018-2019 Alyssa Rosenzweig
      3  *
      4  * Permission is hereby granted, free of charge, to any person obtaining a
      5  * copy of this software and associated documentation files (the "Software"),
      6  * to deal in the Software without restriction, including without limitation
      7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
      8  * and/or sell copies of the Software, and to permit persons to whom the
      9  * Software is furnished to do so, subject to the following conditions:
     10  *
     11  * The above copyright notice and this permission notice (including the next
     12  * paragraph) shall be included in all copies or substantial portions of the
     13  * Software.
     14  *
     15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
     18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
     19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
     20  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
     21  * SOFTWARE.
     22  *
     23  */
     24 
     25 #include "pan_context.h"
     26 #include "pan_util.h"
     27 #include "pan_format.h"
     28 
     29 #include "util/u_format.h"
     30 
     31 static unsigned
     32 panfrost_sfbd_format(struct pipe_surface *surf)
     33 {
     34         /* TODO */
     35         return 0xb84e0281; /* RGB32, no MSAA */
     36 }
     37 
     38 static void
     39 panfrost_sfbd_clear(
     40                 struct panfrost_job *job,
     41                 struct mali_single_framebuffer *sfbd)
     42 {
     43         struct panfrost_context *ctx = job->ctx;
     44 
     45         if (job->clear & PIPE_CLEAR_COLOR) {
     46                 sfbd->clear_color_1 = job->clear_color;
     47                 sfbd->clear_color_2 = job->clear_color;
     48                 sfbd->clear_color_3 = job->clear_color;
     49                 sfbd->clear_color_4 = job->clear_color;
     50         }
     51 
     52         if (job->clear & PIPE_CLEAR_DEPTH) {
     53                 sfbd->clear_depth_1 = job->clear_depth;
     54                 sfbd->clear_depth_2 = job->clear_depth;
     55                 sfbd->clear_depth_3 = job->clear_depth;
     56                 sfbd->clear_depth_4 = job->clear_depth;
     57 
     58                 sfbd->depth_buffer = ctx->depth_stencil_buffer.gpu;
     59                 sfbd->depth_buffer_enable = MALI_DEPTH_STENCIL_ENABLE;
     60         }
     61 
     62         if (job->clear & PIPE_CLEAR_STENCIL) {
     63                 sfbd->clear_stencil = job->clear_stencil;
     64 
     65                 sfbd->stencil_buffer = ctx->depth_stencil_buffer.gpu;
     66                 sfbd->stencil_buffer_enable = MALI_DEPTH_STENCIL_ENABLE;
     67         }
     68 
     69         /* Set flags based on what has been cleared, for the SFBD case */
     70         /* XXX: What do these flags mean? */
     71         int clear_flags = 0x101100;
     72 
     73         if (!(job->clear & ~(PIPE_CLEAR_COLOR | PIPE_CLEAR_DEPTH | PIPE_CLEAR_STENCIL))) {
     74                 /* On a tiler like this, it's fastest to clear all three buffers at once */
     75 
     76                 clear_flags |= MALI_CLEAR_FAST;
     77         } else {
     78                 clear_flags |= MALI_CLEAR_SLOW;
     79 
     80                 if (job->clear & PIPE_CLEAR_STENCIL)
     81                         clear_flags |= MALI_CLEAR_SLOW_STENCIL;
     82         }
     83 
     84         sfbd->clear_flags = clear_flags;
     85 }
     86 
     87 static void
     88 panfrost_sfbd_set_cbuf(
     89                 struct mali_single_framebuffer *fb,
     90                 struct pipe_surface *surf,
     91                 bool flip_y)
     92 {
     93         struct panfrost_resource *rsrc = pan_resource(surf->texture);
     94 
     95         signed stride = rsrc->bo->slices[0].stride;
     96 
     97         fb->format = panfrost_sfbd_format(surf);
     98 
     99         if (rsrc->bo->layout == PAN_LINEAR) {
    100                 mali_ptr framebuffer = rsrc->bo->gpu;
    101 
    102                 /* The default is upside down from OpenGL's perspective. */
    103                 if (flip_y) {
    104                         framebuffer += stride * (surf->texture->height0 - 1);
    105                         stride = -stride;
    106                 }
    107 
    108                 fb->framebuffer = framebuffer;
    109                 fb->stride = stride;
    110         } else {
    111                 fprintf(stderr, "Invalid render layout\n");
    112                 assert(0);
    113         }
    114 }
    115 
    116 /* Creates an SFBD for the FRAGMENT section of the bound framebuffer */
    117 
    118 mali_ptr
    119 panfrost_sfbd_fragment(struct panfrost_context *ctx, bool flip_y)
    120 {
    121         struct panfrost_job *job = panfrost_get_job_for_fbo(ctx);
    122         struct mali_single_framebuffer fb = panfrost_emit_sfbd(ctx);
    123 
    124         panfrost_sfbd_clear(job, &fb);
    125 
    126         /* SFBD does not support MRT natively; sanity check */
    127         assert(ctx->pipe_framebuffer.nr_cbufs == 1);
    128         panfrost_sfbd_set_cbuf(&fb, ctx->pipe_framebuffer.cbufs[0], flip_y);
    129 
    130         if (ctx->pipe_framebuffer.zsbuf) {
    131                 /* TODO */
    132         }
    133 
    134         if (job->requirements & PAN_REQ_MSAA)
    135                 fb.format |= MALI_FRAMEBUFFER_MSAA_A | MALI_FRAMEBUFFER_MSAA_B;
    136 
    137         return panfrost_upload_transient(ctx, &fb, sizeof(fb)) | MALI_SFBD;
    138 }
    139