Mesa (master): freedreno: Document CP_INDIRECT_BUFFER_CHAIN

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Module: Mesa
Branch: master
Commit: b103157a0e7e2d2e669df0c8169cfc1c719aa9d2
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=b103157a0e7e2d2e669df0c8169cfc1c719aa9d2

Author: Connor Abbott <cwabbott0 at gmail.com>
Date:   Thu Jan 23 16:36:18 2020 +0100

freedreno: Document CP_INDIRECT_BUFFER_CHAIN

This will let us use batch chaining instead of growing batches on a5xx
and a6xx.

Reviewed-by: Rob Clark <robdclark at gmail.com>
Tested-by: Marge Bot <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3537>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3537>

---

 src/freedreno/registers/adreno_pm4.xml | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/freedreno/registers/adreno_pm4.xml b/src/freedreno/registers/adreno_pm4.xml
index 48f77f64c98..78847fbc021 100644
--- a/src/freedreno/registers/adreno_pm4.xml
+++ b/src/freedreno/registers/adreno_pm4.xml
@@ -157,6 +157,12 @@ xsi:schemaLocation="http://nouveau.freedesktop.org/ rules-ng.xsd">
 	<value name="CP_PREEMPT_ENABLE" value="0x1c"/>
 	<value name="CP_PREEMPT_TOKEN" value="0x1e"/>
 	<value name="CP_INDIRECT_BUFFER" value="0x3f"/>
+	<doc>
+		Takes the same arguments as CP_INDIRECT_BUFFER, but jumps to
+		another buffer at the same level. Must be at the end of IB, and
+		doesn't work with draw state IB's.
+	</doc>
+	<value name="CP_INDIRECT_BUFFER_CHAIN" value="0x57" variants="A5XX-"/>
 	<doc>indirect buffer dispatch.  same as IB, but init is pipelined</doc>
 	<value name="CP_INDIRECT_BUFFER_PFD" value="0x37"/>
 	<doc>wait for the IDLE state of the engine</doc>