[PATCH 2/2] drm/amd/display: Add disclaimer to BW and DML code provided by HW

[Harry Wentland]

This code can sometimes look troubling but we trust it as it comes from
HW teams with a guarantee of correctness. Add a note to these files to
explain this.

Signed-off-by: Harry Wentland <harry.wentland at amd.com>
---
 drivers/gpu/drm/amd/display/dc/calcs/dce_calcs.c              |  9 +++++++++
 drivers/gpu/drm/amd/display/dc/calcs/dcn_calc_auto.c          |  9 +++++++++
 drivers/gpu/drm/amd/display/dc/calcs/dcn_calc_math.c          |  9 +++++++++
 drivers/gpu/drm/amd/display/dc/calcs/dcn_calcs.c              |  9 +++++++++
 drivers/gpu/drm/amd/display/dc/dml/display_mode_vba.c         |  9 +++++++++
 drivers/gpu/drm/amd/display/dc/dml/display_rq_dlg_calc.c      |  9 +++++++++
 drivers/gpu/drm/amd/display/dc/dml/dml1_display_rq_dlg_calc.c |  9 +++++++++
 drivers/gpu/drm/amd/display/dc/dml/soc_bounding_box.c         | 10 ++++++++++
 8 files changed, 73 insertions(+)

diff --git a/drivers/gpu/drm/amd/display/dc/calcs/dce_calcs.c b/drivers/gpu/drm/amd/display/dc/calcs/dce_calcs.c
index 6347712db834..75afb4077651 100644
--- a/drivers/gpu/drm/amd/display/dc/calcs/dce_calcs.c
+++ b/drivers/gpu/drm/amd/display/dc/calcs/dce_calcs.c
@@ -29,6 +29,15 @@
 #include "core_types.h"
 #include "dal_asic_id.h"
 
+/*
+ * NOTE:
+ *   This file is gcc-parseable HW gospel, coming straight from HW engineers.
+ *
+ * It doesn't adhere to Linux kernel style and sometimes will do thing in odd
+ * ways. Unless there is something clearly wrong with it the code should
+ * remain as-is as it provides us with a guarantee from HW that it is correct.
+ */
+
 /*******************************************************************************
  * Private Functions
  ******************************************************************************/
diff --git a/drivers/gpu/drm/amd/display/dc/calcs/dcn_calc_auto.c b/drivers/gpu/drm/amd/display/dc/calcs/dcn_calc_auto.c
index 626f9cf8aad2..e3408f121cdc 100644
--- a/drivers/gpu/drm/amd/display/dc/calcs/dcn_calc_auto.c
+++ b/drivers/gpu/drm/amd/display/dc/calcs/dcn_calc_auto.c
@@ -27,6 +27,15 @@
 #include "dcn_calc_auto.h"
 #include "dcn_calc_math.h"
 
+/*
+ * NOTE:
+ *   This file is gcc-parseable HW gospel, coming straight from HW engineers.
+ *
+ * It doesn't adhere to Linux kernel style and sometimes will do thing in odd
+ * ways. Unless there is something clearly wrong with it the code should
+ * remain as-is as it provides us with a guarantee from HW that it is correct.
+ */
+
 /*REVISION#250*/
 void scaler_settings_calculation(struct dcn_bw_internal_vars *v)
 {
diff --git a/drivers/gpu/drm/amd/display/dc/calcs/dcn_calc_math.c b/drivers/gpu/drm/amd/display/dc/calcs/dcn_calc_math.c
index 102b5db28402..2522c9e66232 100644
--- a/drivers/gpu/drm/amd/display/dc/calcs/dcn_calc_math.c
+++ b/drivers/gpu/drm/amd/display/dc/calcs/dcn_calc_math.c
@@ -25,6 +25,15 @@
 
 #include "dcn_calc_math.h"
 
+/*
+ * NOTE:
+ *   This file is gcc-parseable HW gospel, coming straight from HW engineers.
+ *
+ * It doesn't adhere to Linux kernel style and sometimes will do thing in odd
+ * ways. Unless there is something clearly wrong with it the code should
+ * remain as-is as it provides us with a guarantee from HW that it is correct.
+ */
+
 #define isNaN(number) number != number
 
 float dcn_bw_mod(const float arg1, const float arg2)
diff --git a/drivers/gpu/drm/amd/display/dc/calcs/dcn_calcs.c b/drivers/gpu/drm/amd/display/dc/calcs/dcn_calcs.c
index a4fbca34bcdf..b702b87318fd 100644
--- a/drivers/gpu/drm/amd/display/dc/calcs/dcn_calcs.c
+++ b/drivers/gpu/drm/amd/display/dc/calcs/dcn_calcs.c
@@ -33,6 +33,15 @@
 #include "dcn10/dcn10_resource.h"
 #include "dcn_calc_math.h"
 
+/*
+ * NOTE:
+ *   This file is gcc-parseable HW gospel, coming straight from HW engineers.
+ *
+ * It doesn't adhere to Linux kernel style and sometimes will do thing in odd
+ * ways. Unless there is something clearly wrong with it the code should
+ * remain as-is as it provides us with a guarantee from HW that it is correct.
+ */
+
 /* Defaults from spreadsheet rev#247 */
 const struct dcn_soc_bounding_box dcn10_soc_defaults = {
 		/* latencies */
diff --git a/drivers/gpu/drm/amd/display/dc/dml/display_mode_vba.c b/drivers/gpu/drm/amd/display/dc/dml/display_mode_vba.c
index 1f337ecfeab0..7d7cc04042c7 100644
--- a/drivers/gpu/drm/amd/display/dc/dml/display_mode_vba.c
+++ b/drivers/gpu/drm/amd/display/dc/dml/display_mode_vba.c
@@ -28,6 +28,15 @@
 
 #include "dml_inline_defs.h"
 
+/*
+ * NOTE:
+ *   This file is gcc-parseable HW gospel, coming straight from HW engineers.
+ *
+ * It doesn't adhere to Linux kernel style and sometimes will do thing in odd
+ * ways. Unless there is something clearly wrong with it the code should
+ * remain as-is as it provides us with a guarantee from HW that it is correct.
+ */
+
 #define BPP_INVALID 0
 #define BPP_BLENDED_PIPE 0xffffffff
 static const unsigned int NumberOfStates = DC__VOLTAGE_STATES;
diff --git a/drivers/gpu/drm/amd/display/dc/dml/display_rq_dlg_calc.c b/drivers/gpu/drm/amd/display/dc/dml/display_rq_dlg_calc.c
index 8ba962df42e6..1c16f2828ad6 100644
--- a/drivers/gpu/drm/amd/display/dc/dml/display_rq_dlg_calc.c
+++ b/drivers/gpu/drm/amd/display/dc/dml/display_rq_dlg_calc.c
@@ -27,6 +27,15 @@
 #include "display_mode_vba.h"
 #include "display_rq_dlg_calc.h"
 
+/*
+ * NOTE:
+ *   This file is gcc-parseable HW gospel, coming straight from HW engineers.
+ *
+ * It doesn't adhere to Linux kernel style and sometimes will do thing in odd
+ * ways. Unless there is something clearly wrong with it the code should
+ * remain as-is as it provides us with a guarantee from HW that it is correct.
+ */
+
 static void calculate_ttu_cursor(struct display_mode_lib *mode_lib,
 		double *refcyc_per_req_delivery_pre_cur,
 		double *refcyc_per_req_delivery_cur,
diff --git a/drivers/gpu/drm/amd/display/dc/dml/dml1_display_rq_dlg_calc.c b/drivers/gpu/drm/amd/display/dc/dml/dml1_display_rq_dlg_calc.c
index 1e4b1e383401..b9f4405d8de5 100644
--- a/drivers/gpu/drm/amd/display/dc/dml/dml1_display_rq_dlg_calc.c
+++ b/drivers/gpu/drm/amd/display/dc/dml/dml1_display_rq_dlg_calc.c
@@ -28,6 +28,15 @@
 
 #include "dml_inline_defs.h"
 
+/*
+ * NOTE:
+ *   This file is gcc-parseable HW gospel, coming straight from HW engineers.
+ *
+ * It doesn't adhere to Linux kernel style and sometimes will do thing in odd
+ * ways. Unless there is something clearly wrong with it the code should
+ * remain as-is as it provides us with a guarantee from HW that it is correct.
+ */
+
 static unsigned int get_bytes_per_element(enum source_format_class source_format, bool is_chroma)
 {
 	unsigned int ret_val = 0;
diff --git a/drivers/gpu/drm/amd/display/dc/dml/soc_bounding_box.c b/drivers/gpu/drm/amd/display/dc/dml/soc_bounding_box.c
index bc7d8c707221..60ecef3cc75b 100644
--- a/drivers/gpu/drm/amd/display/dc/dml/soc_bounding_box.c
+++ b/drivers/gpu/drm/amd/display/dc/dml/soc_bounding_box.c
@@ -27,6 +27,16 @@
 #include "dc_features.h"
 
 #include "dml_inline_defs.h"
+
+/*
+ * NOTE:
+ *   This file is gcc-parseable HW gospel, coming straight from HW engineers.
+ *
+ * It doesn't adhere to Linux kernel style and sometimes will do thing in odd
+ * ways. Unless there is something clearly wrong with it the code should
+ * remain as-is as it provides us with a guarantee from HW that it is correct.
+ */
+
 void dml_socbb_set_latencies(soc_bounding_box_st *to_box, soc_bounding_box_st *from_box)
 {
 	to_box->dram_clock_change_latency_us = from_box->dram_clock_change_latency_us;
-- 
2.14.1