[PATCH 05/15] drm/amd/display: Fix gamma colour corruption for 10 bit surfaces

[Harry Wentland]

From: Jordan Lazare <Jordan.Lazare at amd.com>

Gamma LUT shouldn't be used for 10-bit and above. Should instead be
using prescale and bypassing input gamma.

Change-Id: I55c08c746bb1e1ab1739e47162ddf06db12fe873
Signed-off-by: Jordan Lazare <Jordan.Lazare at amd.com>
Acked-by: Harry Wentland <Harry.Wentland at amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng at amd.com>
---
 .../amd/display/dc/dce110/dce110_hw_sequencer.c    | 15 ++++-
 drivers/gpu/drm/amd/display/dc/dce80/Makefile      |  3 +-
 .../gpu/drm/amd/display/dc/dce80/dce80_ipp_gamma.c | 71 ----------------------
 3 files changed, 15 insertions(+), 74 deletions(-)
 delete mode 100644 drivers/gpu/drm/amd/display/dc/dce80/dce80_ipp_gamma.c

diff --git a/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c b/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c
index 2f68bf20dfe2..2d2daa694a30 100644
--- a/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c
+++ b/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c
@@ -233,6 +233,19 @@ static void build_prescale_params(struct ipp_prescale_params *prescale_params,
 	}
 }
 
+
+/* Only use LUT for 8 bit formats */
+static bool use_lut(const struct core_surface *surface)
+{
+	switch (surface->public.format) {
+	case SURFACE_PIXEL_FORMAT_GRPH_ARGB8888:
+	case SURFACE_PIXEL_FORMAT_GRPH_ABGR8888:
+		return true;
+	default:
+		return false;
+	}
+}
+
 static bool dce110_set_input_transfer_func(
 	struct pipe_ctx *pipe_ctx,
 	const struct core_surface *surface)
@@ -251,7 +264,7 @@ static bool dce110_set_input_transfer_func(
 	build_prescale_params(&prescale_params, surface);
 	ipp->funcs->ipp_program_prescale(ipp, &prescale_params);
 
-	if (surface->public.gamma_correction)
+	if (surface->public.gamma_correction && use_lut(surface))
 	    ipp->funcs->ipp_program_input_lut(ipp, surface->public.gamma_correction);
 
 	if (tf == NULL) {
diff --git a/drivers/gpu/drm/amd/display/dc/dce80/Makefile b/drivers/gpu/drm/amd/display/dc/dce80/Makefile
index 0261d1bfccb5..8d2c3dbfced1 100644
--- a/drivers/gpu/drm/amd/display/dc/dce80/Makefile
+++ b/drivers/gpu/drm/amd/display/dc/dce80/Makefile
@@ -2,8 +2,7 @@
 # Makefile for the 'controller' sub-component of DAL.
 # It provides the control and status of HW CRTC block.
 
-DCE80 = dce80_ipp.o dce80_ipp_gamma.o \
-	dce80_timing_generator.o \
+DCE80 = dce80_ipp.o dce80_timing_generator.o \
 	dce80_compressor.o dce80_mem_input.o dce80_hw_sequencer.o \
 	dce80_resource.o
 
diff --git a/drivers/gpu/drm/amd/display/dc/dce80/dce80_ipp_gamma.c b/drivers/gpu/drm/amd/display/dc/dce80/dce80_ipp_gamma.c
deleted file mode 100644
index 760168df5290..000000000000
--- a/drivers/gpu/drm/amd/display/dc/dce80/dce80_ipp_gamma.c
+++ /dev/null
@@ -1,71 +0,0 @@
-/*
- * Copyright 2012-15 Advanced Micro Devices, Inc.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
- * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
- * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
- * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
- * OTHER DEALINGS IN THE SOFTWARE.
- *
- * Authors: AMD
- *
- */
-
-#include "dm_services.h"
-
-#include "include/logger_interface.h"
-#include "include/fixed31_32.h"
-#include "basics/conversion.h"
-
-#include "dce/dce_8_0_d.h"
-#include "dce/dce_8_0_sh_mask.h"
-
-#include "dce80_ipp.h"
-#include "dce110/dce110_ipp.h"
-
-#define DCP_REG(reg)\
-	(reg + ipp80->offsets.dcp_offset)
-
-/*PROTOTYPE DECLARATIONS*/
-
-static void set_legacy_input_gamma_mode(
-	struct dce110_ipp *ipp80,
-	bool is_legacy);
-
-void dce80_ipp_set_legacy_input_gamma_mode(
-		struct input_pixel_processor *ipp,
-		bool is_legacy)
-{
-	struct dce110_ipp *ipp80 = TO_DCE80_IPP(ipp);
-
-	set_legacy_input_gamma_mode(ipp80, is_legacy);
-}
-
-static void set_legacy_input_gamma_mode(
-	struct dce110_ipp *ipp80,
-	bool is_legacy)
-{
-	const uint32_t addr = DCP_REG(mmINPUT_GAMMA_CONTROL);
-	uint32_t value = dm_read_reg(ipp80->base.ctx, addr);
-
-	set_reg_field_value(
-		value,
-		!is_legacy,
-		INPUT_GAMMA_CONTROL,
-		GRPH_INPUT_GAMMA_MODE);
-
-	dm_write_reg(ipp80->base.ctx, addr, value);
-}
-
-- 
2.9.3