drm/amd/display: Add DEC/CRB basic doc

Add a kernel-doc to the DE-Tile function hook.

Tested-by: Mark Broadworth <mark.broadworth@amd.com>
Reviewed-by: Aurabindo Pillai <Aurabindo.Pillai@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_hubbub.c b/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_hubbub.c
index 9fbb723..a88a714 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_hubbub.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_hubbub.c
@@ -41,6 +41,10 @@
 #define FN(reg_name, field_name) \
        hubbub2->shifts->field_name, hubbub2->masks->field_name
 
+/**
+ * @DCN32_CRB_SEGMENT_SIZE_KB: Maximum Configurable Return Buffer size for
+ * DCN32
+ */
 #define DCN32_CRB_SEGMENT_SIZE_KB 64
 
 static void dcn32_init_crb(struct hubbub *hubbub)

diff --git a/drivers/gpu/drm/amd/display/dc/inc/hw/dchubbub.h b/drivers/gpu/drm/amd/display/dc/inc/hw/dchubbub.h
index e7571c6..58f758f 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/inc/hw/dchubbub.h
+++ b/drivers/gpu/drm/amd/display/dc/inc/hw/dchubbub.h
@@ -167,6 +167,21 @@ struct hubbub_funcs {
        void (*force_pstate_change_control)(struct hubbub *hubbub, bool force, bool allow);
 
        void (*init_watermarks)(struct hubbub *hubbub);
+
+       /**
+        * @program_det_size:
+        *
+        * DE-Tile buffers (DET) is a memory that is used to convert the tiled
+        * data into linear, which the rest of the display can use to generate
+        * the graphics output. One of the main features of this component is
+        * that each pipe has a configurable DET buffer which means that when a
+        * pipe is not enabled, the device can assign the memory to other
+        * enabled pipes to try to be more efficient.
+        *
+        * DET logic is handled by dchubbub. Some ASICs provide a feature named
+        * Configurable Return Buffer (CRB) segments which can be allocated to
+        * compressed or detiled buffers.
+        */
        void (*program_det_size)(struct hubbub *hubbub, int hubp_inst, unsigned det_buffer_size_in_kbyte);
        void (*program_compbuf_size)(struct hubbub *hubbub, unsigned compbuf_size_kb, bool safe_to_increase);
        void (*init_crb)(struct hubbub *hubbub);