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i965/gen9: Refactor msrt mcs initialization 

This will be re-used to initialize auxiliary buffers in lossless
compression case.

Signed-off-by: Topi Pohjolainen <topi.pohjolainen@intel.com>
Reviewed-by: Ben Widawsky <benjamin.widawsky@intel.com>
This commit is contained in:
Topi Pohjolainen 2015-12-10 16:03:03 +02:00
parent 2bd58790e2
commit dd37b6aaa9
1 changed files with 22 additions and 14 deletions
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36
src/mesa/drivers/dri/i965/intel_mipmap_tree.c
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@ -1449,6 +1449,27 @@ intel_miptree_copy_teximage(struct brw_context *brw,
intel_obj->needs_validate = true;
}
static void
intel_miptree_init_mcs(struct brw_context *brw,
struct intel_mipmap_tree *mt,
int init_value)
{
/* From the Ivy Bridge PRM, Vol 2 Part 1 p326:
*
* When MCS buffer is enabled and bound to MSRT, it is required that it
* is cleared prior to any rendering.
*
* Since we don't use the MCS buffer for any purpose other than rendering,
* it makes sense to just clear it immediately upon allocation.
*
* Note: the clear value for MCS buffers is all 1's, so we memset to 0xff.
*/
void *data = intel_miptree_map_raw(brw, mt->mcs_mt);
memset(data, init_value, mt->mcs_mt->total_height * mt->mcs_mt->pitch);
intel_miptree_unmap_raw(mt->mcs_mt);
mt->fast_clear_state = INTEL_FAST_CLEAR_STATE_CLEAR;
}
static bool
intel_miptree_alloc_mcs(struct brw_context *brw,
struct intel_mipmap_tree *mt,
@ -1505,20 +1526,7 @@ intel_miptree_alloc_mcs(struct brw_context *brw,
0 /* num_samples */,
mcs_flags);
/* From the Ivy Bridge PRM, Vol 2 Part 1 p326:
*
* When MCS buffer is enabled and bound to MSRT, it is required that it
* is cleared prior to any rendering.
*
* Since we don't use the MCS buffer for any purpose other than rendering,
* it makes sense to just clear it immediately upon allocation.
*
* Note: the clear value for MCS buffers is all 1's, so we memset to 0xff.
*/
void *data = intel_miptree_map_raw(brw, mt->mcs_mt);
memset(data, 0xff, mt->mcs_mt->total_height * mt->mcs_mt->pitch);
intel_miptree_unmap_raw(mt->mcs_mt);
mt->fast_clear_state = INTEL_FAST_CLEAR_STATE_CLEAR;
intel_miptree_init_mcs(brw, mt, 0xFF);
return mt->mcs_mt;
}