drm/amd/display: Enable regamma 25 segments and use double buffer.

Moved custom floating point calculation to the shared place
between dce's.

Signed-off-by: Vitaly Prosyak <vitaly.prosyak@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Harry Wentland <Harry.Wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

5 files changed, 240 insertions, 173 deletions

diff --git a/drivers/gpu/drm/amd/display/dc/calcs/Makefile b/drivers/gpu/drm/amd/display/dc/calcs/Makefile
index 4bb08aea6a03..2f4c8e771b8f 100644
--- a/drivers/gpu/drm/amd/display/dc/calcs/Makefile
+++ b/drivers/gpu/drm/amd/display/dc/calcs/Makefile
@@ -3,7 +3,7 @@
 # It calculates Bandwidth and Watermarks values for HW programming
 #
 
-BW_CALCS = bandwidth_calcs.o bw_fixed.o
+BW_CALCS = bandwidth_calcs.o bw_fixed.o custom_float.o
 
 AMD_DAL_BW_CALCS = $(addprefix $(AMDDALPATH)/dc/calcs/,$(BW_CALCS))
 
diff --git a/drivers/gpu/drm/amd/display/dc/calcs/custom_float.c b/drivers/gpu/drm/amd/display/dc/calcs/custom_float.c
new file mode 100644
index 000000000000..7243c37f569e
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/calcs/custom_float.c
@@ -0,0 +1,197 @@
+/*
+ * Copyright 2017 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 "custom_float.h"
+
+
+static bool build_custom_float(
+	struct fixed31_32 value,
+	const struct custom_float_format *format,
+	bool *negative,
+	uint32_t *mantissa,
+	uint32_t *exponenta)
+{
+	uint32_t exp_offset = (1 << (format->exponenta_bits - 1)) - 1;
+
+	const struct fixed31_32 mantissa_constant_plus_max_fraction =
+		dal_fixed31_32_from_fraction(
+			(1LL << (format->mantissa_bits + 1)) - 1,
+			1LL << format->mantissa_bits);
+
+	struct fixed31_32 mantiss;
+
+	if (dal_fixed31_32_eq(
+		value,
+		dal_fixed31_32_zero)) {
+		*negative = false;
+		*mantissa = 0;
+		*exponenta = 0;
+		return true;
+	}
+
+	if (dal_fixed31_32_lt(
+		value,
+		dal_fixed31_32_zero)) {
+		*negative = format->sign;
+		value = dal_fixed31_32_neg(value);
+	} else {
+		*negative = false;
+	}
+
+	if (dal_fixed31_32_lt(
+		value,
+		dal_fixed31_32_one)) {
+		uint32_t i = 1;
+
+		do {
+			value = dal_fixed31_32_shl(value, 1);
+			++i;
+		} while (dal_fixed31_32_lt(
+			value,
+			dal_fixed31_32_one));
+
+		--i;
+
+		if (exp_offset <= i) {
+			*mantissa = 0;
+			*exponenta = 0;
+			return true;
+		}
+
+		*exponenta = exp_offset - i;
+	} else if (dal_fixed31_32_le(
+		mantissa_constant_plus_max_fraction,
+		value)) {
+		uint32_t i = 1;
+
+		do {
+			value = dal_fixed31_32_shr(value, 1);
+			++i;
+		} while (dal_fixed31_32_lt(
+			mantissa_constant_plus_max_fraction,
+			value));
+
+		*exponenta = exp_offset + i - 1;
+	} else {
+		*exponenta = exp_offset;
+	}
+
+	mantiss = dal_fixed31_32_sub(
+		value,
+		dal_fixed31_32_one);
+
+	if (dal_fixed31_32_lt(
+			mantiss,
+			dal_fixed31_32_zero) ||
+		dal_fixed31_32_lt(
+			dal_fixed31_32_one,
+			mantiss))
+		mantiss = dal_fixed31_32_zero;
+	else
+		mantiss = dal_fixed31_32_shl(
+			mantiss,
+			format->mantissa_bits);
+
+	*mantissa = dal_fixed31_32_floor(mantiss);
+
+	return true;
+}
+
+static bool setup_custom_float(
+	const struct custom_float_format *format,
+	bool negative,
+	uint32_t mantissa,
+	uint32_t exponenta,
+	uint32_t *result)
+{
+	uint32_t i = 0;
+	uint32_t j = 0;
+
+	uint32_t value = 0;
+
+	/* verification code:
+	 * once calculation is ok we can remove it
+	 */
+
+	const uint32_t mantissa_mask =
+		(1 << (format->mantissa_bits + 1)) - 1;
+
+	const uint32_t exponenta_mask =
+		(1 << (format->exponenta_bits + 1)) - 1;
+
+	if (mantissa & ~mantissa_mask) {
+		BREAK_TO_DEBUGGER();
+		mantissa = mantissa_mask;
+	}
+
+	if (exponenta & ~exponenta_mask) {
+		BREAK_TO_DEBUGGER();
+		exponenta = exponenta_mask;
+	}
+
+	/* end of verification code */
+
+	while (i < format->mantissa_bits) {
+		uint32_t mask = 1 << i;
+
+		if (mantissa & mask)
+			value |= mask;
+
+		++i;
+	}
+
+	while (j < format->exponenta_bits) {
+		uint32_t mask = 1 << j;
+
+		if (exponenta & mask)
+			value |= mask << i;
+
+		++j;
+	}
+
+	if (negative && format->sign)
+		value |= 1 << (i + j);
+
+	*result = value;
+
+	return true;
+}
+
+bool convert_to_custom_float_format(
+	struct fixed31_32 value,
+	const struct custom_float_format *format,
+	uint32_t *result)
+{
+	uint32_t mantissa;
+	uint32_t exponenta;
+	bool negative;
+
+	return build_custom_float(
+		value, format, &negative, &mantissa, &exponenta) &&
+	setup_custom_float(
+		format, negative, mantissa, exponenta, result);
+}
+
+
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 6a5cec0d4e1f..88a2fa99f5da 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
@@ -49,6 +49,7 @@
 /* include DCE11 register header files */
 #include "dce/dce_11_0_d.h"
 #include "dce/dce_11_0_sh_mask.h"
+#include "custom_float.h"
 
 struct dce110_hw_seq_reg_offsets {
 	uint32_t crtc;
@@ -286,174 +287,6 @@ static bool dce110_set_input_transfer_func(
 	return result;
 }
 
-static bool build_custom_float(
-	struct fixed31_32 value,
-	const struct custom_float_format *format,
-	bool *negative,
-	uint32_t *mantissa,
-	uint32_t *exponenta)
-{
-	uint32_t exp_offset = (1 << (format->exponenta_bits - 1)) - 1;
-
-	const struct fixed31_32 mantissa_constant_plus_max_fraction =
-		dal_fixed31_32_from_fraction(
-			(1LL << (format->mantissa_bits + 1)) - 1,
-			1LL << format->mantissa_bits);
-
-	struct fixed31_32 mantiss;
-
-	if (dal_fixed31_32_eq(
-		value,
-		dal_fixed31_32_zero)) {
-		*negative = false;
-		*mantissa = 0;
-		*exponenta = 0;
-		return true;
-	}
-
-	if (dal_fixed31_32_lt(
-		value,
-		dal_fixed31_32_zero)) {
-		*negative = format->sign;
-		value = dal_fixed31_32_neg(value);
-	} else {
-		*negative = false;
-	}
-
-	if (dal_fixed31_32_lt(
-		value,
-		dal_fixed31_32_one)) {
-		uint32_t i = 1;
-
-		do {
-			value = dal_fixed31_32_shl(value, 1);
-			++i;
-		} while (dal_fixed31_32_lt(
-			value,
-			dal_fixed31_32_one));
-
-		--i;
-
-		if (exp_offset <= i) {
-			*mantissa = 0;
-			*exponenta = 0;
-			return true;
-		}
-
-		*exponenta = exp_offset - i;
-	} else if (dal_fixed31_32_le(
-		mantissa_constant_plus_max_fraction,
-		value)) {
-		uint32_t i = 1;
-
-		do {
-			value = dal_fixed31_32_shr(value, 1);
-			++i;
-		} while (dal_fixed31_32_lt(
-			mantissa_constant_plus_max_fraction,
-			value));
-
-		*exponenta = exp_offset + i - 1;
-	} else {
-		*exponenta = exp_offset;
-	}
-
-	mantiss = dal_fixed31_32_sub(
-		value,
-		dal_fixed31_32_one);
-
-	if (dal_fixed31_32_lt(
-			mantiss,
-			dal_fixed31_32_zero) ||
-		dal_fixed31_32_lt(
-			dal_fixed31_32_one,
-			mantiss))
-		mantiss = dal_fixed31_32_zero;
-	else
-		mantiss = dal_fixed31_32_shl(
-			mantiss,
-			format->mantissa_bits);
-
-	*mantissa = dal_fixed31_32_floor(mantiss);
-
-	return true;
-}
-
-static bool setup_custom_float(
-	const struct custom_float_format *format,
-	bool negative,
-	uint32_t mantissa,
-	uint32_t exponenta,
-	uint32_t *result)
-{
-	uint32_t i = 0;
-	uint32_t j = 0;
-
-	uint32_t value = 0;
-
-	/* verification code:
-	 * once calculation is ok we can remove it
-	 */
-
-	const uint32_t mantissa_mask =
-		(1 << (format->mantissa_bits + 1)) - 1;
-
-	const uint32_t exponenta_mask =
-		(1 << (format->exponenta_bits + 1)) - 1;
-
-	if (mantissa & ~mantissa_mask) {
-		BREAK_TO_DEBUGGER();
-		mantissa = mantissa_mask;
-	}
-
-	if (exponenta & ~exponenta_mask) {
-		BREAK_TO_DEBUGGER();
-		exponenta = exponenta_mask;
-	}
-
-	/* end of verification code */
-
-	while (i < format->mantissa_bits) {
-		uint32_t mask = 1 << i;
-
-		if (mantissa & mask)
-			value |= mask;
-
-		++i;
-	}
-
-	while (j < format->exponenta_bits) {
-		uint32_t mask = 1 << j;
-
-		if (exponenta & mask)
-			value |= mask << i;
-
-		++j;
-	}
-
-	if (negative && format->sign)
-		value |= 1 << (i + j);
-
-	*result = value;
-
-	return true;
-}
-
-static bool convert_to_custom_float_format(
-	struct fixed31_32 value,
-	const struct custom_float_format *format,
-	uint32_t *result)
-{
-	uint32_t mantissa;
-	uint32_t exponenta;
-	bool negative;
-
-	return build_custom_float(
-		value, format, &negative, &mantissa, &exponenta) &&
-	setup_custom_float(
-		format, negative, mantissa, exponenta, result);
-}
-
 static bool convert_to_custom_float(
 		struct pwl_result_data *rgb_resulted,
 		struct curve_points *arr_points,
@@ -579,7 +412,7 @@ static bool convert_to_custom_float(
 	return true;
 }
 
-bool dce110_translate_regamma_to_hw_format(const struct dc_transfer_func
+static bool dce110_translate_regamma_to_hw_format(const struct dc_transfer_func
 		*output_tf, struct pwl_params *regamma_params)
 {
 	struct curve_points *arr_points;
diff --git a/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.h b/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.h
index 68632dd28155..a6b4d0d2429f 100644
--- a/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.h
+++ b/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.h
@@ -58,8 +58,5 @@ void dce110_power_down(struct core_dc *dc);
 
 void dce110_update_pending_status(struct pipe_ctx *pipe_ctx);
 
-bool dce110_translate_regamma_to_hw_format(const struct dc_transfer_func
-		*output_tf, struct pwl_params *regamma_params);
-
 #endif /* __DC_HWSS_DCE110_H__ */
 
diff --git a/drivers/gpu/drm/amd/display/dc/inc/custom_float.h b/drivers/gpu/drm/amd/display/dc/inc/custom_float.h
new file mode 100644
index 000000000000..f57239672216
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/inc/custom_float.h
@@ -0,0 +1,40 @@
+/*
+ * Copyright 2017 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
+ *
+ */
+
+#ifndef CUSTOM_FLOAT_H_
+#define CUSTOM_FLOAT_H_
+
+#include "bw_fixed.h"
+#include "hw_shared.h"
+#include "opp.h"
+
+
+bool convert_to_custom_float_format(
+	struct fixed31_32 value,
+	const struct custom_float_format *format,
+	uint32_t *result);
+
+
+#endif //CUSTOM_FLOAT_H_