fd2_emit.c

/*
 * Copyright (C) 2012-2013 Rob Clark <[email protected]>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 *
 * Authors:
 *    Rob Clark <[email protected]>
 */

#include "pipe/p_state.h"
#include "util/u_helpers.h"
#include "util/u_memory.h"
#include "util/u_string.h"

#include "freedreno_resource.h"

#include "fd2_blend.h"
#include "fd2_context.h"
#include "fd2_emit.h"
#include "fd2_program.h"
#include "fd2_rasterizer.h"
#include "fd2_texture.h"
#include "fd2_util.h"
#include "fd2_zsa.h"

/* NOTE: just define the position for const regs statically.. the blob
 * driver doesn't seem to change these dynamically, and I can't really
 * think of a good reason to so..
 */
#define VS_CONST_BASE 0x20
#define PS_CONST_BASE 0x120

static void
emit_constants(struct fd_ringbuffer *ring, uint32_t base,
               struct fd_constbuf_stateobj *constbuf,
               struct fd2_shader_stateobj *shader)
{
   uint32_t enabled_mask = constbuf->enabled_mask;
   uint32_t start_base = base;
   unsigned i;

   /* emit user constants: */
   while (enabled_mask) {
      unsigned index = ffs(enabled_mask) - 1;
      struct pipe_constant_buffer *cb = &constbuf->cb[index];
      unsigned size = align(cb->buffer_size, 4) / 4; /* size in dwords */

      // I expect that size should be a multiple of vec4's:
      assert(size == align(size, 4));

      /* hmm, sometimes we still seem to end up with consts bound,
       * even if shader isn't using them, which ends up overwriting
       * const reg's used for immediates.. this is a hack to work
       * around that:
       */
      if (shader && ((base - start_base) >= (shader->first_immediate * 4)))
         break;

      const uint32_t *dwords;

      if (cb->user_buffer) {
         dwords = cb->user_buffer;
      } else {
         struct fd_resource *rsc = fd_resource(cb->buffer);
         dwords = fd_bo_map(rsc->bo);
      }

      dwords = (uint32_t *)(((uint8_t *)dwords) + cb->buffer_offset);

      OUT_PKT3(ring, CP_SET_CONSTANT, size + 1);
      OUT_RING(ring, base);
      for (i = 0; i < size; i++)
         OUT_RING(ring, *(dwords++));

      base += size;
      enabled_mask &= ~(1 << index);
   }

   /* emit shader immediates: */
   if (shader) {
      for (i = 0; i < shader->num_immediates; i++) {
         OUT_PKT3(ring, CP_SET_CONSTANT, 5);
         OUT_RING(ring, start_base + (4 * (shader->first_immediate + i)));
         OUT_RING(ring, shader->immediates[i].val[0]);
         OUT_RING(ring, shader->immediates[i].val[1]);
         OUT_RING(ring, shader->immediates[i].val[2]);
         OUT_RING(ring, shader->immediates[i].val[3]);
         base += 4;
      }
   }
}

typedef uint32_t texmask;

static texmask
emit_texture(struct fd_ringbuffer *ring, struct fd_context *ctx,
             struct fd_texture_stateobj *tex, unsigned samp_id, texmask emitted)
{
   unsigned const_idx = fd2_get_const_idx(ctx, tex, samp_id);
   static const struct fd2_sampler_stateobj dummy_sampler = {};
   static const struct fd2_pipe_sampler_view dummy_view = {};
   const struct fd2_sampler_stateobj *sampler;
   const struct fd2_pipe_sampler_view *view;
   struct fd_resource *rsc;

   if (emitted & (1 << const_idx))
      return 0;

   sampler = tex->samplers[samp_id]
                ? fd2_sampler_stateobj(tex->samplers[samp_id])
                : &dummy_sampler;
   view = tex->textures[samp_id] ? fd2_pipe_sampler_view(tex->textures[samp_id])
                                 : &dummy_view;

   rsc = view->base.texture ? fd_resource(view->base.texture) : NULL;

   OUT_PKT3(ring, CP_SET_CONSTANT, 7);
   OUT_RING(ring, 0x00010000 + (0x6 * const_idx));

   OUT_RING(ring, sampler->tex0 | view->tex0);
   if (rsc)
      OUT_RELOC(ring, rsc->bo, fd_resource_offset(rsc, 0, 0), view->tex1, 0);
   else
      OUT_RING(ring, 0);

   OUT_RING(ring, view->tex2);
   OUT_RING(ring, sampler->tex3 | view->tex3);
   OUT_RING(ring, sampler->tex4 | view->tex4);

   if (rsc && rsc->b.b.last_level)
      OUT_RELOC(ring, rsc->bo, fd_resource_offset(rsc, 1, 0), view->tex5, 0);
   else
      OUT_RING(ring, view->tex5);

   return (1 << const_idx);
}

static void
emit_textures(struct fd_ringbuffer *ring, struct fd_context *ctx)
{
   struct fd_texture_stateobj *fragtex = &ctx->tex[PIPE_SHADER_FRAGMENT];
   struct fd_texture_stateobj *verttex = &ctx->tex[PIPE_SHADER_VERTEX];
   texmask emitted = 0;
   unsigned i;

   for (i = 0; i < verttex->num_samplers; i++)
      if (verttex->samplers[i])
         emitted |= emit_texture(ring, ctx, verttex, i, emitted);

   for (i = 0; i < fragtex->num_samplers; i++)
      if (fragtex->samplers[i])
         emitted |= emit_texture(ring, ctx, fragtex, i, emitted);
}

void
fd2_emit_vertex_bufs(struct fd_ringbuffer *ring, uint32_t val,
                     struct fd2_vertex_buf *vbufs, uint32_t n)
{
   unsigned i;

   OUT_PKT3(ring, CP_SET_CONSTANT, 1 + (2 * n));
   OUT_RING(ring, (0x1 << 16) | (val & 0xffff));
   for (i = 0; i < n; i++) {
      struct fd_resource *rsc = fd_resource(vbufs[i].prsc);
      OUT_RELOC(ring, rsc->bo, vbufs[i].offset, 3, 0);
      OUT_RING(ring, vbufs[i].size);
   }
}

void
fd2_emit_state_binning(struct fd_context *ctx,
                       const enum fd_dirty_3d_state dirty)
{
   struct fd2_blend_stateobj *blend = fd2_blend_stateobj(ctx->blend);
   struct fd_ringbuffer *ring = ctx->batch->binning;

   /* subset of fd2_emit_state needed for hw binning on a20x */

   if (dirty & (FD_DIRTY_PROG | FD_DIRTY_VTXSTATE))
      fd2_program_emit(ctx, ring, &ctx->prog);

   if (dirty & (FD_DIRTY_PROG | FD_DIRTY_CONST)) {
      emit_constants(ring, VS_CONST_BASE * 4,
                     &ctx->constbuf[PIPE_SHADER_VERTEX],
                     (dirty & FD_DIRTY_PROG) ? ctx->prog.vs : NULL);
   }

   if (dirty & FD_DIRTY_VIEWPORT) {
      OUT_PKT3(ring, CP_SET_CONSTANT, 9);
      OUT_RING(ring, 0x00000184);
      OUT_RING(ring, fui(ctx->viewport.translate[0]));
      OUT_RING(ring, fui(ctx->viewport.translate[1]));
      OUT_RING(ring, fui(ctx->viewport.translate[2]));
      OUT_RING(ring, fui(0.0f));
      OUT_RING(ring, fui(ctx->viewport.scale[0]));
      OUT_RING(ring, fui(ctx->viewport.scale[1]));
      OUT_RING(ring, fui(ctx->viewport.scale[2]));
      OUT_RING(ring, fui(0.0f));
   }

   /* not sure why this is needed */
   if (dirty & (FD_DIRTY_BLEND | FD_DIRTY_FRAMEBUFFER)) {
      OUT_PKT3(ring, CP_SET_CONSTANT, 2);
      OUT_RING(ring, CP_REG(REG_A2XX_RB_BLEND_CONTROL));
      OUT_RING(ring, blend->rb_blendcontrol);

      OUT_PKT3(ring, CP_SET_CONSTANT, 2);
      OUT_RING(ring, CP_REG(REG_A2XX_RB_COLOR_MASK));
      OUT_RING(ring, blend->rb_colormask);
   }

   OUT_PKT3(ring, CP_SET_CONSTANT, 2);
   OUT_RING(ring, CP_REG(REG_A2XX_PA_SU_SC_MODE_CNTL));
   OUT_RING(ring, A2XX_PA_SU_SC_MODE_CNTL_FACE_KILL_ENABLE);
}

void
fd2_emit_state(struct fd_context *ctx, const enum fd_dirty_3d_state dirty)
{
   struct fd2_blend_stateobj *blend = fd2_blend_stateobj(ctx->blend);
   struct fd2_zsa_stateobj *zsa = fd2_zsa_stateobj(ctx->zsa);
   struct fd2_shader_stateobj *fs = ctx->prog.fs;
   struct fd_ringbuffer *ring = ctx->batch->draw;

   /* NOTE: we probably want to eventually refactor this so each state
    * object handles emitting it's own state..  although the mapping of
    * state to registers is not always orthogonal, sometimes a single
    * register contains bitfields coming from multiple state objects,
    * so not sure the best way to deal with that yet.
    */

   if (dirty & FD_DIRTY_SAMPLE_MASK) {
      OUT_PKT3(ring, CP_SET_CONSTANT, 2);
      OUT_RING(ring, CP_REG(REG_A2XX_PA_SC_AA_MASK));
      OUT_RING(ring, ctx->sample_mask);
   }

   if (dirty & (FD_DIRTY_ZSA | FD_DIRTY_STENCIL_REF | FD_DIRTY_PROG)) {
      struct pipe_stencil_ref *sr = &ctx->stencil_ref;
      uint32_t val = zsa->rb_depthcontrol;

      if (fs->has_kill)
         val &= ~A2XX_RB_DEPTHCONTROL_EARLY_Z_ENABLE;

      OUT_PKT3(ring, CP_SET_CONSTANT, 2);
      OUT_RING(ring, CP_REG(REG_A2XX_RB_DEPTHCONTROL));
      OUT_RING(ring, val);

      OUT_PKT3(ring, CP_SET_CONSTANT, 4);
      OUT_RING(ring, CP_REG(REG_A2XX_RB_STENCILREFMASK_BF));
      OUT_RING(ring, zsa->rb_stencilrefmask_bf |
                        A2XX_RB_STENCILREFMASK_STENCILREF(sr->ref_value[1]));
      OUT_RING(ring, zsa->rb_stencilrefmask |
                        A2XX_RB_STENCILREFMASK_STENCILREF(sr->ref_value[0]));
      OUT_RING(ring, zsa->rb_alpha_ref);
   }

   if (ctx->rasterizer && dirty & FD_DIRTY_RASTERIZER) {
      struct fd2_rasterizer_stateobj *rasterizer =
         fd2_rasterizer_stateobj(ctx->rasterizer);
      OUT_PKT3(ring, CP_SET_CONSTANT, 3);
      OUT_RING(ring, CP_REG(REG_A2XX_PA_CL_CLIP_CNTL));
      OUT_RING(ring, rasterizer->pa_cl_clip_cntl);
      OUT_RING(ring, rasterizer->pa_su_sc_mode_cntl |
                        A2XX_PA_SU_SC_MODE_CNTL_VTX_WINDOW_OFFSET_ENABLE);

      OUT_PKT3(ring, CP_SET_CONSTANT, 5);
      OUT_RING(ring, CP_REG(REG_A2XX_PA_SU_POINT_SIZE));
      OUT_RING(ring, rasterizer->pa_su_point_size);
      OUT_RING(ring, rasterizer->pa_su_point_minmax);
      OUT_RING(ring, rasterizer->pa_su_line_cntl);
      OUT_RING(ring, rasterizer->pa_sc_line_stipple);

      OUT_PKT3(ring, CP_SET_CONSTANT, 6);
      OUT_RING(ring, CP_REG(REG_A2XX_PA_SU_VTX_CNTL));
      OUT_RING(ring, rasterizer->pa_su_vtx_cntl);
      OUT_RING(ring, fui(1.0)); /* PA_CL_GB_VERT_CLIP_ADJ */
      OUT_RING(ring, fui(1.0)); /* PA_CL_GB_VERT_DISC_ADJ */
      OUT_RING(ring, fui(1.0)); /* PA_CL_GB_HORZ_CLIP_ADJ */
      OUT_RING(ring, fui(1.0)); /* PA_CL_GB_HORZ_DISC_ADJ */

      if (rasterizer->base.offset_tri) {
         /* TODO: why multiply scale by 2 ? without it deqp test fails
          * deqp/piglit tests aren't very precise
          */
         OUT_PKT3(ring, CP_SET_CONSTANT, 5);
         OUT_RING(ring, CP_REG(REG_A2XX_PA_SU_POLY_OFFSET_FRONT_SCALE));
         OUT_RING(ring,
                  fui(rasterizer->base.offset_scale * 2.0f)); /* FRONT_SCALE */
         OUT_RING(ring, fui(rasterizer->base.offset_units));  /* FRONT_OFFSET */
         OUT_RING(ring,
                  fui(rasterizer->base.offset_scale * 2.0f)); /* BACK_SCALE */
         OUT_RING(ring, fui(rasterizer->base.offset_units));  /* BACK_OFFSET */
      }
   }

   /* NOTE: scissor enabled bit is part of rasterizer state: */
   if (dirty & (FD_DIRTY_SCISSOR | FD_DIRTY_RASTERIZER)) {
      struct pipe_scissor_state *scissor = fd_context_get_scissor(ctx);

      OUT_PKT3(ring, CP_SET_CONSTANT, 3);
      OUT_RING(ring, CP_REG(REG_A2XX_PA_SC_WINDOW_SCISSOR_TL));
      OUT_RING(ring, xy2d(scissor->minx, /* PA_SC_WINDOW_SCISSOR_TL */
                          scissor->miny));
      OUT_RING(ring, xy2d(scissor->maxx, /* PA_SC_WINDOW_SCISSOR_BR */
                          scissor->maxy));

      ctx->batch->max_scissor.minx =
         MIN2(ctx->batch->max_scissor.minx, scissor->minx);
      ctx->batch->max_scissor.miny =
         MIN2(ctx->batch->max_scissor.miny, scissor->miny);
      ctx->batch->max_scissor.maxx =
         MAX2(ctx->batch->max_scissor.maxx, scissor->maxx);
      ctx->batch->max_scissor.maxy =
         MAX2(ctx->batch->max_scissor.maxy, scissor->maxy);
   }

   if (dirty & FD_DIRTY_VIEWPORT) {
      OUT_PKT3(ring, CP_SET_CONSTANT, 7);
      OUT_RING(ring, CP_REG(REG_A2XX_PA_CL_VPORT_XSCALE));
      OUT_RING(ring, fui(ctx->viewport.scale[0]));     /* PA_CL_VPORT_XSCALE */
      OUT_RING(ring, fui(ctx->viewport.translate[0])); /* PA_CL_VPORT_XOFFSET */
      OUT_RING(ring, fui(ctx->viewport.scale[1]));     /* PA_CL_VPORT_YSCALE */
      OUT_RING(ring, fui(ctx->viewport.translate[1])); /* PA_CL_VPORT_YOFFSET */
      OUT_RING(ring, fui(ctx->viewport.scale[2]));     /* PA_CL_VPORT_ZSCALE */
      OUT_RING(ring, fui(ctx->viewport.translate[2])); /* PA_CL_VPORT_ZOFFSET */

      /* set viewport in C65/C66, for a20x hw binning and fragcoord.z */
      OUT_PKT3(ring, CP_SET_CONSTANT, 9);
      OUT_RING(ring, 0x00000184);

      OUT_RING(ring, fui(ctx->viewport.translate[0]));
      OUT_RING(ring, fui(ctx->viewport.translate[1]));
      OUT_RING(ring, fui(ctx->viewport.translate[2]));
      OUT_RING(ring, fui(0.0f));

      OUT_RING(ring, fui(ctx->viewport.scale[0]));
      OUT_RING(ring, fui(ctx->viewport.scale[1]));
      OUT_RING(ring, fui(ctx->viewport.scale[2]));
      OUT_RING(ring, fui(0.0f));
   }

   if (dirty & (FD_DIRTY_PROG | FD_DIRTY_VTXSTATE | FD_DIRTY_TEXSTATE))
      fd2_program_emit(ctx, ring, &ctx->prog);

   if (dirty & (FD_DIRTY_PROG | FD_DIRTY_CONST)) {
      emit_constants(ring, VS_CONST_BASE * 4,
                     &ctx->constbuf[PIPE_SHADER_VERTEX],
                     (dirty & FD_DIRTY_PROG) ? ctx->prog.vs : NULL);
      emit_constants(ring, PS_CONST_BASE * 4,
                     &ctx->constbuf[PIPE_SHADER_FRAGMENT],
                     (dirty & FD_DIRTY_PROG) ? ctx->prog.fs : NULL);
   }

   if (dirty & (FD_DIRTY_BLEND | FD_DIRTY_ZSA)) {
      OUT_PKT3(ring, CP_SET_CONSTANT, 2);
      OUT_RING(ring, CP_REG(REG_A2XX_RB_COLORCONTROL));
      OUT_RING(ring, zsa->rb_colorcontrol | blend->rb_colorcontrol);
   }

   if (dirty & (FD_DIRTY_BLEND | FD_DIRTY_FRAMEBUFFER)) {
      OUT_PKT3(ring, CP_SET_CONSTANT, 2);
      OUT_RING(ring, CP_REG(REG_A2XX_RB_BLEND_CONTROL));
      OUT_RING(ring, blend->rb_blendcontrol);

      OUT_PKT3(ring, CP_SET_CONSTANT, 2);
      OUT_RING(ring, CP_REG(REG_A2XX_RB_COLOR_MASK));
      OUT_RING(ring, blend->rb_colormask);
   }

   if (dirty & FD_DIRTY_BLEND_COLOR) {
      OUT_PKT3(ring, CP_SET_CONSTANT, 5);
      OUT_RING(ring, CP_REG(REG_A2XX_RB_BLEND_RED));
      OUT_RING(ring, float_to_ubyte(ctx->blend_color.color[0]));
      OUT_RING(ring, float_to_ubyte(ctx->blend_color.color[1]));
      OUT_RING(ring, float_to_ubyte(ctx->blend_color.color[2]));
      OUT_RING(ring, float_to_ubyte(ctx->blend_color.color[3]));
   }

   if (dirty & (FD_DIRTY_TEX | FD_DIRTY_PROG))
      emit_textures(ring, ctx);
}

/* emit per-context initialization:
 */
void
fd2_emit_restore(struct fd_context *ctx, struct fd_ringbuffer *ring)
{
   if (is_a20x(ctx->screen)) {
      OUT_PKT0(ring, REG_A2XX_RB_BC_CONTROL, 1);
      OUT_RING(ring, A2XX_RB_BC_CONTROL_ACCUM_TIMEOUT_SELECT(3) |
                        A2XX_RB_BC_CONTROL_DISABLE_LZ_NULL_ZCMD_DROP |
                        A2XX_RB_BC_CONTROL_ENABLE_CRC_UPDATE |
                        A2XX_RB_BC_CONTROL_ACCUM_DATA_FIFO_LIMIT(8) |
                        A2XX_RB_BC_CONTROL_MEM_EXPORT_TIMEOUT_SELECT(3));

      /* not sure why this is required */
      OUT_PKT3(ring, CP_SET_CONSTANT, 2);
      OUT_RING(ring, CP_REG(REG_A2XX_PA_SC_VIZ_QUERY));
      OUT_RING(ring, A2XX_PA_SC_VIZ_QUERY_VIZ_QUERY_ID(16));

      OUT_PKT3(ring, CP_SET_CONSTANT, 2);
      OUT_RING(ring, CP_REG(REG_A2XX_VGT_VERTEX_REUSE_BLOCK_CNTL));
      OUT_RING(ring, 0x00000002);

      OUT_PKT3(ring, CP_SET_CONSTANT, 2);
      OUT_RING(ring, CP_REG(REG_A2XX_VGT_OUT_DEALLOC_CNTL));
      OUT_RING(ring, 0x00000002);
   } else {
      OUT_PKT3(ring, CP_SET_CONSTANT, 2);
      OUT_RING(ring, CP_REG(REG_A2XX_VGT_VERTEX_REUSE_BLOCK_CNTL));
      OUT_RING(ring, 0x0000003b);
   }

   /* enable perfcntrs */
   OUT_PKT0(ring, REG_A2XX_CP_PERFMON_CNTL, 1);
   OUT_RING(ring, COND(FD_DBG(PERFC), 1));

   /* note: perfcntrs don't work without the PM_OVERRIDE bit */
   OUT_PKT0(ring, REG_A2XX_RBBM_PM_OVERRIDE1, 2);
   OUT_RING(ring, 0xffffffff);
   OUT_RING(ring, 0x00000fff);

   OUT_PKT0(ring, REG_A2XX_TP0_CHICKEN, 1);
   OUT_RING(ring, 0x00000002);

   OUT_PKT3(ring, CP_INVALIDATE_STATE, 1);
   OUT_RING(ring, 0x00007fff);

   OUT_PKT3(ring, CP_SET_CONSTANT, 2);
   OUT_RING(ring, CP_REG(REG_A2XX_SQ_VS_CONST));
   OUT_RING(ring, A2XX_SQ_VS_CONST_BASE(VS_CONST_BASE) |
                     A2XX_SQ_VS_CONST_SIZE(0x100));

   OUT_PKT3(ring, CP_SET_CONSTANT, 2);
   OUT_RING(ring, CP_REG(REG_A2XX_SQ_PS_CONST));
   OUT_RING(ring,
            A2XX_SQ_PS_CONST_BASE(PS_CONST_BASE) | A2XX_SQ_PS_CONST_SIZE(0xe0));

   OUT_PKT3(ring, CP_SET_CONSTANT, 3);
   OUT_RING(ring, CP_REG(REG_A2XX_VGT_MAX_VTX_INDX));
   OUT_RING(ring, 0xffffffff); /* VGT_MAX_VTX_INDX */
   OUT_RING(ring, 0x00000000); /* VGT_MIN_VTX_INDX */

   OUT_PKT3(ring, CP_SET_CONSTANT, 2);
   OUT_RING(ring, CP_REG(REG_A2XX_VGT_INDX_OFFSET));
   OUT_RING(ring, 0x00000000);

   OUT_PKT3(ring, CP_SET_CONSTANT, 2);
   OUT_RING(ring, CP_REG(REG_A2XX_SQ_CONTEXT_MISC));
   OUT_RING(ring, A2XX_SQ_CONTEXT_MISC_SC_SAMPLE_CNTL(CENTERS_ONLY));

   OUT_PKT3(ring, CP_SET_CONSTANT, 2);
   OUT_RING(ring, CP_REG(REG_A2XX_SQ_INTERPOLATOR_CNTL));
   OUT_RING(ring, 0xffffffff);

   OUT_PKT3(ring, CP_SET_CONSTANT, 2);
   OUT_RING(ring, CP_REG(REG_A2XX_PA_SC_AA_CONFIG));
   OUT_RING(ring, 0x00000000);

   OUT_PKT3(ring, CP_SET_CONSTANT, 2);
   OUT_RING(ring, CP_REG(REG_A2XX_PA_SC_LINE_CNTL));
   OUT_RING(ring, 0x00000000);

   OUT_PKT3(ring, CP_SET_CONSTANT, 2);
   OUT_RING(ring, CP_REG(REG_A2XX_PA_SC_WINDOW_OFFSET));
   OUT_RING(ring, 0x00000000);

   // XXX we change this dynamically for draw/clear.. vs gmem<->mem..
   OUT_PKT3(ring, CP_SET_CONSTANT, 2);
   OUT_RING(ring, CP_REG(REG_A2XX_RB_MODECONTROL));
   OUT_RING(ring, A2XX_RB_MODECONTROL_EDRAM_MODE(COLOR_DEPTH));

   OUT_PKT3(ring, CP_SET_CONSTANT, 2);
   OUT_RING(ring, CP_REG(REG_A2XX_RB_SAMPLE_POS));
   OUT_RING(ring, 0x88888888);

   OUT_PKT3(ring, CP_SET_CONSTANT, 2);
   OUT_RING(ring, CP_REG(REG_A2XX_RB_COLOR_DEST_MASK));
   OUT_RING(ring, 0xffffffff);

   OUT_PKT3(ring, CP_SET_CONSTANT, 2);
   OUT_RING(ring, CP_REG(REG_A2XX_RB_COPY_DEST_INFO));
   OUT_RING(ring, A2XX_RB_COPY_DEST_INFO_FORMAT(COLORX_4_4_4_4) |
                     A2XX_RB_COPY_DEST_INFO_WRITE_RED |
                     A2XX_RB_COPY_DEST_INFO_WRITE_GREEN |
                     A2XX_RB_COPY_DEST_INFO_WRITE_BLUE |
                     A2XX_RB_COPY_DEST_INFO_WRITE_ALPHA);

   OUT_PKT3(ring, CP_SET_CONSTANT, 3);
   OUT_RING(ring, CP_REG(REG_A2XX_SQ_WRAPPING_0));
   OUT_RING(ring, 0x00000000); /* SQ_WRAPPING_0 */
   OUT_RING(ring, 0x00000000); /* SQ_WRAPPING_1 */

   OUT_PKT3(ring, CP_SET_DRAW_INIT_FLAGS, 1);
   OUT_RING(ring, 0x00000000);

   OUT_PKT3(ring, CP_WAIT_REG_EQ, 4);
   OUT_RING(ring, 0x000005d0);
   OUT_RING(ring, 0x00000000);
   OUT_RING(ring, 0x5f601000);
   OUT_RING(ring, 0x00000001);

   OUT_PKT0(ring, REG_A2XX_SQ_INST_STORE_MANAGMENT, 1);
   OUT_RING(ring, 0x00000180);

   OUT_PKT3(ring, CP_INVALIDATE_STATE, 1);
   OUT_RING(ring, 0x00000300);

   OUT_PKT3(ring, CP_SET_SHADER_BASES, 1);
   OUT_RING(ring, 0x80000180);

   /* not sure what this form of CP_SET_CONSTANT is.. */
   OUT_PKT3(ring, CP_SET_CONSTANT, 13);
   OUT_RING(ring, 0x00000000);
   OUT_RING(ring, 0x00000000);
   OUT_RING(ring, 0x00000000);
   OUT_RING(ring, 0x00000000);
   OUT_RING(ring, 0x00000000);
   OUT_RING(ring, 0x469c4000);
   OUT_RING(ring, 0x3f800000);
   OUT_RING(ring, 0x3f000000);
   OUT_RING(ring, 0x00000000);
   OUT_RING(ring, 0x40000000);
   OUT_RING(ring, 0x3f400000);
   OUT_RING(ring, 0x3ec00000);
   OUT_RING(ring, 0x3e800000);

   OUT_PKT3(ring, CP_SET_CONSTANT, 2);
   OUT_RING(ring, CP_REG(REG_A2XX_RB_COLOR_MASK));
   OUT_RING(ring,
            A2XX_RB_COLOR_MASK_WRITE_RED | A2XX_RB_COLOR_MASK_WRITE_GREEN |
               A2XX_RB_COLOR_MASK_WRITE_BLUE | A2XX_RB_COLOR_MASK_WRITE_ALPHA);

   OUT_PKT3(ring, CP_SET_CONSTANT, 5);
   OUT_RING(ring, CP_REG(REG_A2XX_RB_BLEND_RED));
   OUT_RING(ring, 0x00000000); /* RB_BLEND_RED */
   OUT_RING(ring, 0x00000000); /* RB_BLEND_GREEN */
   OUT_RING(ring, 0x00000000); /* RB_BLEND_BLUE */
   OUT_RING(ring, 0x000000ff); /* RB_BLEND_ALPHA */

   OUT_PKT3(ring, CP_SET_CONSTANT, 2);
   OUT_RING(ring, CP_REG(REG_A2XX_PA_CL_VTE_CNTL));
   OUT_RING(ring, A2XX_PA_CL_VTE_CNTL_VTX_W0_FMT |
                     A2XX_PA_CL_VTE_CNTL_VPORT_X_SCALE_ENA |
                     A2XX_PA_CL_VTE_CNTL_VPORT_X_OFFSET_ENA |
                     A2XX_PA_CL_VTE_CNTL_VPORT_Y_SCALE_ENA |
                     A2XX_PA_CL_VTE_CNTL_VPORT_Y_OFFSET_ENA |
                     A2XX_PA_CL_VTE_CNTL_VPORT_Z_SCALE_ENA |
                     A2XX_PA_CL_VTE_CNTL_VPORT_Z_OFFSET_ENA);
}

void
fd2_emit_init_screen(struct pipe_screen *pscreen)
{
   struct fd_screen *screen = fd_screen(pscreen);
   screen->emit_ib = fd2_emit_ib;
}

void
fd2_emit_init(struct pipe_context *pctx)
{
}