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r600g: add workaround for buggy hw scissor on eg/cayman.

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This is ported from the same fix to the DDX.

Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Dave Airlie
2011-05-25 09:25:03 +10:00
parent 7779f6d1df
commit 868c04205c
1 changed files with 14 additions and 1 deletions
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src/gallium/drivers/r600/evergreen_state.c
+14 -1
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@@ -861,6 +861,7 @@ static void evergreen_set_framebuffer_state(struct pipe_context *ctx,
struct r600_pipe_state *rstate = CALLOC_STRUCT(r600_pipe_state);
u32 shader_mask, tl, br, target_mask;
enum radeon_family family;
int scissor_width, scissor_height;
if (rstate == NULL)
return;
@@ -891,8 +892,20 @@ static void evergreen_set_framebuffer_state(struct pipe_context *ctx,
target_mask ^= 0xf << (i * 4);
shader_mask |= 0xf << (i * 4);
}
scissor_width = state->width;
scissor_height = state->height;
/* EG hw workaround */
if (scissor_width == 0)
scissor_width = 1;
if (scissor_height == 0)
scissor_height = 1;
/* cayman hw workaround */
if (family == CHIP_CAYMAN) {
if (scissor_width == 1 && scissor_height == 1)
scissor_width = 2;
}
tl = S_028240_TL_X(0) | S_028240_TL_Y(0);
br = S_028244_BR_X(state->width) | S_028244_BR_Y(state->height);
br = S_028244_BR_X(scissor_width) | S_028244_BR_Y(scissor_height);
r600_pipe_state_add_reg(rstate,
R_028240_PA_SC_GENERIC_SCISSOR_TL, tl,