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radeon: add support for write followed by read relocs. 

the DDX does this and used to handle it internally
main
Dave Airlie 2009-06-30 12:19:28 +10:00
parent 790097c513
commit de1ed01214
1 changed files with 12 additions and 5 deletions
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17
libdrm/radeon/radeon_cs_gem.c
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@ -144,12 +144,19 @@ static int cs_gem_write_reloc(struct radeon_cs *cs,
* domain set then the read_domain should also be set for this
* new relocation.
*/
if (reloc->read_domain && !read_domain) {
return -EINVAL;
}
if (reloc->write_domain && !write_domain) {
return -EINVAL;
/* the DDX expects to read and write from same pixmap */
if (write_domain && (reloc->read_domain & write_domain)) {
reloc->read_domain = 0;
reloc->write_domain = write_domain;
} else if (read_domain & reloc->write_domain) {
reloc->read_domain = 0;
} else {
if (write_domain != reloc->write_domain)
return -EINVAL;
if (read_domain != reloc->read_domain)
return -EINVAL;
}
reloc->read_domain |= read_domain;
reloc->write_domain |= write_domain;
/* update flags */