[PATCH i-g-t 08/14] lib/igt_draw: Add 64bpp support for the non-XY_FAST_COLOR_BLT path

[Ville Syrjala]

From: Ville Syrjälä <ville.syrjala at linux.intel.com>

XY_COLOR_BLT can't do 64bpp since we have nowhere to store
the other half of the color. In order to support 64bpp
pixel formats we have to get a little bit creative and
use XY_PAT_BLT_IMMEDIATE instead. We simply treat the
buffer as 32bpp, double the horizontal dimensions to
compensate, and alternate between the lower and upper
dwords of the color value when filling the 8x8 pattern.

Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
---
 lib/igt_draw.c  | 24 ++++++++++++++++++++++++
 lib/intel_reg.h |  2 ++
 2 files changed, 26 insertions(+)

diff --git a/lib/igt_draw.c b/lib/igt_draw.c
index 2312a0c71030..81da01a6c5ad 100644
--- a/lib/igt_draw.c
+++ b/lib/igt_draw.c
@@ -833,6 +833,30 @@ static void draw_rect_blt(int fd, struct cmd_data *cmd_data,
 		intel_bb_out(ibb, (1 << 29) | ((pitch-1) << 14) | (buf_height-1));
 		intel_bb_out(ibb, 0);	/* mipmap levels / qpitch */
 		intel_bb_out(ibb, 0);	/* mipmap index / alignment */
+	} else if (buf->bpp == 64) {
+		int x = rect->x * 2;
+		int w = rect->w * 2;
+
+		blt_cmd_depth = 3 << 24; /* 32bpp */
+		blt_cmd_len = ((ver >= 8) ?  0x4 : 0x3) + 8*8;
+		blt_cmd_tiling = (tiling) ? XY_COLOR_BLT_TILED : 0;
+		pitch = (ver >= 4 && tiling) ? buf->stride / 4 : buf->stride;
+
+		switch_blt_tiling(ibb, tiling, true);
+
+		intel_bb_out(ibb, XY_PAT_BLT_IMMEDIATE_CMD_NOLEN | XY_COLOR_BLT_WRITE_ALPHA |
+			     XY_COLOR_BLT_WRITE_RGB | blt_cmd_tiling | blt_cmd_len);
+		intel_bb_out(ibb, blt_cmd_depth | (0xF0 << 16) | pitch);
+		intel_bb_out(ibb, (rect->y << 16) | x);
+		intel_bb_out(ibb, ((rect->y + rect->h) << 16) | (x + w));
+		intel_bb_emit_reloc_fenced(ibb, dst->handle, 0, I915_GEM_DOMAIN_RENDER,
+					   0, dst->addr.offset);
+		for (int i = 0; i < 8*8; i += 2) {
+			intel_bb_out(ibb, color);
+			intel_bb_out(ibb, color >> 32);
+		}
+
+		switch_blt_tiling(ibb, tiling, false);
 	} else {
 		switch (buf->bpp) {
 		case 8:
diff --git a/lib/intel_reg.h b/lib/intel_reg.h
index 26833c66f8e7..903b44b59fc3 100644
--- a/lib/intel_reg.h
+++ b/lib/intel_reg.h
@@ -2545,6 +2545,8 @@ SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 #define XY_COLOR_BLT_WRITE_RGB		(1<<20)
 #define XY_COLOR_BLT_TILED		(1<<11)
 
+#define XY_PAT_BLT_IMMEDIATE_CMD_NOLEN	((2<<29)|(0x72<<22))
+
 #define XY_SETUP_CLIP_BLT_CMD		((2<<29)|(3<<22)|1)
 
 #define XY_SRC_COPY_BLT_WRITE_ALPHA	(1<<21)
-- 
2.45.2