Hello Animesh
On 8/28/2019 12:40 AM, Animesh Manna wrote:
From gen12 onwards Display State Buffer(DSB) is hardware capability
added which allows driver to batch submit display HW programming.
Let's rephrase this line a bit, how about:
DSB is a new hardware capability, introduced in GEN12 display.
It allows a driver to batch-program display HW registers.
Feature flag has_dsb added to identify the driver/platform support
at runtime.
Cc: Jani Nikula <jani.nikula@xxxxxxxxx>
Cc: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx>
Signed-off-by: Animesh Manna <animesh.manna@xxxxxxxxx>
---
drivers/gpu/drm/i915/i915_drv.h | 2 ++
drivers/gpu/drm/i915/intel_device_info.h | 1 +
2 files changed, 3 insertions(+)
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index b42651a387d9..d32cfdb78b74 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -1856,6 +1856,8 @@ static inline struct drm_i915_private *pdev_to_i915(struct pci_dev *pdev)
(BUILD_BUG_ON_ZERO(!__builtin_constant_p(n)) + \
INTEL_INFO(dev_priv)->gen == (n))
+#define HAS_DSB(dev_priv) (INTEL_INFO(dev_priv)->display.has_dsb)
+
/*
* Return true if revision is in range [since,until] inclusive.
*
diff --git a/drivers/gpu/drm/i915/intel_device_info.h b/drivers/gpu/drm/i915/intel_device_info.h
index 92e0c2e0954c..e206f298f48e 100644
--- a/drivers/gpu/drm/i915/intel_device_info.h
+++ b/drivers/gpu/drm/i915/intel_device_info.h
@@ -135,6 +135,7 @@ enum intel_ppgtt_type {
func(has_csr); \
func(has_ddi); \
func(has_dp_mst); \
+ func(has_dsb); \
func(has_fbc); \
func(has_gmch); \
func(has_hotplug); \
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