[RFC PATCH 116/162] drm/i915/dsb: Enable lmem for dsb

[Matthew Auld]

From: Animesh Manna <animesh.manna at intel.com>

For dgfx, DSB should use local memory instead of system memory. Using
local memory surely brings performance improvement as local memory is
close to gpu. Also want to avoid multiple gpu using system memory.

Use LMEM API to create gem object needed for DSB command buffer.

Cc: Jani Nikula <jani.nikula at linux.intel.com>
Cc: Ramalingam C <ramalingam.c at intel.com>
Signed-off-by: Animesh Manna <animesh.manna at intel.com>
Cc: Lucas De Marchi <lucas.demarchi at intel.com>
---
 drivers/gpu/drm/i915/display/intel_dsb.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/display/intel_dsb.c b/drivers/gpu/drm/i915/display/intel_dsb.c
index 857126822a88..73795e415ad5 100644
--- a/drivers/gpu/drm/i915/display/intel_dsb.c
+++ b/drivers/gpu/drm/i915/display/intel_dsb.c
@@ -6,6 +6,7 @@
 
 #include "i915_drv.h"
 #include "intel_display_types.h"
+#include "gem/i915_gem_lmem.h"
 
 #define DSB_BUF_SIZE    (2 * PAGE_SIZE)
 
@@ -278,7 +279,11 @@ void intel_dsb_prepare(struct intel_crtc_state *crtc_state)
 
 	wakeref = intel_runtime_pm_get(&i915->runtime_pm);
 
-	obj = i915_gem_object_create_internal(i915, DSB_BUF_SIZE);
+	if (HAS_LMEM(i915))
+		obj = i915_gem_object_create_lmem(i915, DSB_BUF_SIZE, 0);
+	else
+		obj = i915_gem_object_create_internal(i915, DSB_BUF_SIZE);
+
 	if (IS_ERR(obj)) {
 		drm_err(&i915->drm, "Gem object creation failed\n");
 		kfree(dsb);
-- 
2.26.2