[Intel-xe] [PATCH v2 3/3] drm/xe/xe2: Update SVG state handling

[Matt Roper]

As with DG2/MTL, Xe2 also fails to emit instruction headers for SVG
state instructions if no explicit state has been set.  The SVG part of
the LRC is nearly identical to DG2/MTL; the only change is that
3DSTATE_DRAWING_RECTANGLE has been replaced by
3DSTATE_DRAWING_RECTANGLE_FAST, so we can just re-use the same state
table and handle that single instruction when we encounter it.

Bspec: 65182
Reviewed-by: Balasubramani Vivekanandan <balasubramani.vivekanandan at intel.com>
Signed-off-by: Matt Roper <matthew.d.roper at intel.com>
---
 .../gpu/drm/xe/instructions/xe_gfxpipe_commands.h |  1 +
 drivers/gpu/drm/xe/xe_lrc.c                       | 15 +++++++++++++--
 2 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/xe/instructions/xe_gfxpipe_commands.h b/drivers/gpu/drm/xe/instructions/xe_gfxpipe_commands.h
index 7be961434719..8e6dd061f2ae 100644
--- a/drivers/gpu/drm/xe/instructions/xe_gfxpipe_commands.h
+++ b/drivers/gpu/drm/xe/instructions/xe_gfxpipe_commands.h
@@ -52,6 +52,7 @@
 
 #define PIPELINE_SELECT				GFXPIPE_SINGLE_DW_CMD(0x1, 0x4)
 
+#define CMD_3DSTATE_DRAWING_RECTANGLE_FAST	GFXPIPE_3D_CMD(0x0, 0x0)
 #define CMD_3DSTATE_CLEAR_PARAMS		GFXPIPE_3D_CMD(0x0, 0x4)
 #define CMD_3DSTATE_DEPTH_BUFFER		GFXPIPE_3D_CMD(0x0, 0x5)
 #define CMD_3DSTATE_STENCIL_BUFFER		GFXPIPE_3D_CMD(0x0, 0x6)
diff --git a/drivers/gpu/drm/xe/xe_lrc.c b/drivers/gpu/drm/xe/xe_lrc.c
index 944bb2f64660..f8754f061599 100644
--- a/drivers/gpu/drm/xe/xe_lrc.c
+++ b/drivers/gpu/drm/xe/xe_lrc.c
@@ -1015,6 +1015,7 @@ static int dump_gfxpipe_command(struct drm_printer *p,
 
 	MATCH(PIPELINE_SELECT);
 
+	MATCH3D(3DSTATE_DRAWING_RECTANGLE_FAST);
 	MATCH3D(3DSTATE_CLEAR_PARAMS);
 	MATCH3D(3DSTATE_DEPTH_BUFFER);
 	MATCH3D(3DSTATE_STENCIL_BUFFER);
@@ -1235,8 +1236,7 @@ void xe_lrc_emit_hwe_state_instructions(struct xe_exec_queue *q, struct xe_bb *b
 
 	switch (GRAPHICS_VERx100(xe)) {
 	case 1255:
-	case 1270:
-	case 1271:
+	case 1270 ... 2004:
 		state_table = xe_hpg_svg_state;
 		state_table_size = ARRAY_SIZE(xe_hpg_svg_state);
 		break;
@@ -1255,6 +1255,17 @@ void xe_lrc_emit_hwe_state_instructions(struct xe_exec_queue *q, struct xe_bb *b
 		xe_gt_assert(gt, num_dw != 0);
 		xe_gt_assert(gt, is_single_dw ^ (num_dw > 1));
 
+		/*
+		 * Xe2's SVG context is the same as the one on DG2 / MTL
+		 * except that 3DSTATE_DRAWING_RECTANGLE (non-pipelined) has
+		 * been replaced by 3DSTATE_DRAWING_RECTANGLE_FAST (pipelined).
+		 * Just make the replacement here rather than defining a
+		 * whole separate table for the single trivial change.
+		 */
+		if (GRAPHICS_VER(xe) >= 20 &&
+		    instr == CMD_3DSTATE_DRAWING_RECTANGLE)
+			instr = CMD_3DSTATE_DRAWING_RECTANGLE_FAST;
+
 		bb->cs[bb->len] = instr;
 		if (!is_single_dw)
 			bb->cs[bb->len] |= (num_dw - 2);
-- 
2.41.0