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r300: fix BE 32-bit CBZB clear values

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CBZB clears use ZB_DEPTHCLEARVALUE for the clear color. On big-endian
hosts the 32-bit payload needs little-endian byte order.

Fixes fast_color_clear/all-colors on RV350.

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/40885>
This commit is contained in:
Pavel Ondračka 2026-03-19 18:33:47 +01:00 • committed by Marge Bot
parent c5423d3e27
commit c52bc90076
1 changed files with 9 additions and 4 deletions
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13
src/gallium/drivers/r300/r300_blit.c
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@ -10,6 +10,7 @@
#include "util/format/u_format.h"
#include "util/half_float.h"
#include "util/u_math.h"
#include "util/u_pack_color.h"
#include "util/u_surface.h"
@ -110,10 +111,14 @@ static uint32_t r300_depth_clear_cb_value(enum pipe_format format,
union util_color uc;
util_pack_color(rgba, format, &uc);
if (util_format_get_blocksizebits(format) == 32)
return uc.ui[0];
else
return uc.us | (uc.us << 16);
if (util_format_get_blocksizebits(format) == 32) {
/* CBZB clears reuse ZB_DEPTHCLEARVALUE, which expects the 32-bit
* payload in little-endian byte order.
*/
return util_cpu_to_le32(uc.ui[0]);
}
return uc.us | (uc.us << 16);
}
static bool r300_cbzb_clear_allowed(struct r300_context *r300,