drm/amd/display: Add DCN3 DWB

Add support to program the DCN3 DWB (Display Writeback)

HW Blocks:

 +--------++------+       +----------+
 | HUBBUB || HUBP |  <--  | MMHUBBUB |
 +--------++------+       +----------+
        |                     ^
        v                     |
    +--------+            +--------+
    |  DPP   |            |  DWB   |
    +--------+            +--------+
        |
        v                      ^
    +--------+                 |
    |  MPC   |                 |
    +--------+                 |
        |                      |
        v                      |
    +-------+                  |
    |  OPP  |                  |
    +-------+                  |
        |                      |
        v                      |
    +--------+                /
    |  OPTC  |  --------------
    +--------+
        |
        v
    +--------+       +--------+
    |  DIO   |       |  DCCG  |
    +--------+       +--------+

Signed-off-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/dc_types.h

@@ -475,6 +475,19 @@ enum display_content_type {
 	DISPLAY_CONTENT_TYPE_GAME = 8
 };
 
+#if defined(CONFIG_DRM_AMD_DC_DCN3_0)
+enum cm_gamut_adjust_type {
+	CM_GAMUT_ADJUST_TYPE_BYPASS = 0,
+	CM_GAMUT_ADJUST_TYPE_HW, /* without adjustments */
+	CM_GAMUT_ADJUST_TYPE_SW /* use adjustments */
+};
+
+struct cm_grph_csc_adjustment {
+	struct fixed31_32 temperature_matrix[12];
+	enum cm_gamut_adjust_type gamut_adjust_type;
+	enum cm_gamut_coef_format gamut_coef_format;
+};
+#endif
 /* writeback */
 struct dwb_stereo_params {
 	bool				stereo_enabled;		/* false: normal mode, true: 3D stereo */
@@ -492,9 +505,21 @@ struct dc_dwb_cnv_params {
 	unsigned int		crop_x;		/* cropped window start x value at cnv output */
 	unsigned int		crop_y;		/* cropped window start y value at cnv output */
 	enum dwb_cnv_out_bpc cnv_out_bpc;	/* cnv output pixel depth - 8bpc or 10bpc */
+#if defined(CONFIG_DRM_AMD_DC_DCN3_0)
+	enum dwb_out_format	fc_out_format;	/* dwb output pixel format - 2101010 or 16161616 and ARGB or RGBA */
+	enum dwb_out_denorm	out_denorm_mode;/* dwb output denormalization mode */
+	unsigned int		out_max_pix_val;/* pixel values greater than out_max_pix_val are clamped to out_max_pix_val */
+	unsigned int		out_min_pix_val;/* pixel values less than out_min_pix_val are clamped to out_min_pix_val */
+#endif
 };
 
 struct dc_dwb_params {
+#if defined(CONFIG_DRM_AMD_DC_DCN3_0)
+	unsigned int			dwbscl_black_color; /* must be in FP1.5.10 */
+	unsigned int			hdr_mult;	/* must be in FP1.6.12 */
+	struct cm_grph_csc_adjustment	csc_params;
+	struct dwb_stereo_params	stereo_params;
+#endif
 	struct dc_dwb_cnv_params	cnv_params;	/* CNV source size and cropping window parameters */
 	unsigned int			dest_width;	/* Destination width */
 	unsigned int			dest_height;	/* Destination height */

drivers/gpu/drm/amd/display/dc/dcn30/dcn30_dwb.c

@@ -0,0 +1,264 @@
+/*
+ * Copyright 2020 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 "reg_helper.h"
+#include "resource.h"
+#include "dwb.h"
+#include "dcn30_dwb.h"
+
+
+#define REG(reg)\
+	dwbc30->dwbc_regs->reg
+
+#define CTX \
+	dwbc30->base.ctx
+
+#undef FN
+#define FN(reg_name, field_name) \
+	dwbc30->dwbc_shift->field_name, dwbc30->dwbc_mask->field_name
+
+#define DC_LOGGER \
+	dwbc30->base.ctx->logger
+
+static bool dwb3_get_caps(struct dwbc *dwbc, struct dwb_caps *caps)
+{
+	if (caps) {
+		caps->adapter_id = 0;	/* we only support 1 adapter currently */
+		caps->hw_version = DCN_VERSION_3_0;
+		caps->num_pipes = 2;
+		memset(&caps->reserved, 0, sizeof(caps->reserved));
+		memset(&caps->reserved2, 0, sizeof(caps->reserved2));
+		caps->sw_version = dwb_ver_2_0;
+		caps->caps.support_dwb = true;
+		caps->caps.support_ogam = true;
+		caps->caps.support_wbscl = true;
+		caps->caps.support_ocsc = false;
+		caps->caps.support_stereo = true;
+		return true;
+	} else {
+		return false;
+	}
+}
+
+void dwb3_config_fc(struct dwbc *dwbc, struct dc_dwb_params *params)
+{
+	struct dcn30_dwbc *dwbc30 = TO_DCN30_DWBC(dwbc);
+
+	/* Set DWB source size */
+	REG_UPDATE_2(FC_SOURCE_SIZE, FC_SOURCE_WIDTH, params->cnv_params.src_width,
+			FC_SOURCE_HEIGHT, params->cnv_params.src_height);
+
+	/* source size is not equal the source size, then enable cropping. */
+	if (params->cnv_params.crop_en) {
+		REG_UPDATE(FC_MODE_CTRL,    FC_WINDOW_CROP_EN, 1);
+		REG_UPDATE(FC_WINDOW_START, FC_WINDOW_START_X, params->cnv_params.crop_x);
+		REG_UPDATE(FC_WINDOW_START, FC_WINDOW_START_Y, params->cnv_params.crop_y);
+		REG_UPDATE(FC_WINDOW_SIZE,  FC_WINDOW_WIDTH,   params->cnv_params.crop_width);
+		REG_UPDATE(FC_WINDOW_SIZE,  FC_WINDOW_HEIGHT,  params->cnv_params.crop_height);
+	} else {
+		REG_UPDATE(FC_MODE_CTRL,    FC_WINDOW_CROP_EN, 0);
+	}
+
+	/* Set CAPTURE_RATE */
+	REG_UPDATE(FC_MODE_CTRL, FC_FRAME_CAPTURE_RATE, params->capture_rate);
+
+	dwb3_set_stereo(dwbc, &params->stereo_params);
+}
+
+bool dwb3_enable(struct dwbc *dwbc, struct dc_dwb_params *params)
+{
+	struct dcn30_dwbc *dwbc30 = TO_DCN30_DWBC(dwbc);
+	DC_LOG_DWB("%s dwb3_enabled at inst = %d", __func__, dwbc->inst);
+
+	/* Set WB_ENABLE (not double buffered; capture not enabled) */
+	REG_UPDATE(DWB_ENABLE_CLK_CTRL, DWB_ENABLE, 1);
+
+	/* Set FC parameters */
+	dwb3_config_fc(dwbc, params);
+
+	/* Program color processing unit */
+	dwb3_program_hdr_mult(dwbc, params);
+	dwb3_set_gamut_remap(dwbc, params);
+	dwb3_ogam_set_input_transfer_func(dwbc, params->out_transfer_func);
+
+	/* Program output denorm */
+	dwb3_set_denorm(dwbc, params);
+
+	/* Enable DWB capture enable (double buffered) */
+	REG_UPDATE(FC_MODE_CTRL, FC_FRAME_CAPTURE_EN, DWB_FRAME_CAPTURE_ENABLE);
+
+	/* First pixel count */
+	REG_UPDATE(FC_FLOW_CTRL, FC_FIRST_PIXEL_DELAY_COUNT, 96);
+
+	return true;
+}
+
+bool dwb3_disable(struct dwbc *dwbc)
+{
+	struct dcn30_dwbc *dwbc30 = TO_DCN30_DWBC(dwbc);
+
+	/* disable FC */
+	REG_UPDATE(FC_MODE_CTRL, FC_FRAME_CAPTURE_EN, DWB_FRAME_CAPTURE_DISABLE);
+
+	/* disable WB */
+	REG_UPDATE(DWB_ENABLE_CLK_CTRL, DWB_ENABLE, 0);
+
+	DC_LOG_DWB("%s dwb3_disabled at inst = %d", __func__, dwbc->inst);
+	return true;
+}
+
+bool dwb3_update(struct dwbc *dwbc, struct dc_dwb_params *params)
+{
+	struct dcn30_dwbc *dwbc30 = TO_DCN30_DWBC(dwbc);
+	unsigned int pre_locked;
+
+	/*
+	 * Check if the caller has already locked DWB registers.
+	 * If so: assume the caller will unlock, so don't touch the lock.
+	 * If not: lock them for this update, then unlock after the
+	 * update is complete.
+	 */
+	REG_GET(DWB_UPDATE_CTRL, DWB_UPDATE_LOCK, &pre_locked);
+	DC_LOG_DWB("%s dwb update, inst = %d", __func__, dwbc->inst);
+
+	if (pre_locked == 0) {
+		/* Lock DWB registers */
+		REG_UPDATE(DWB_UPDATE_CTRL, DWB_UPDATE_LOCK, 1);
+	}
+
+	/* Set FC parameters */
+	dwb3_config_fc(dwbc, params);
+
+	/* Program color processing unit */
+	dwb3_program_hdr_mult(dwbc, params);
+	dwb3_set_gamut_remap(dwbc, params);
+	dwb3_ogam_set_input_transfer_func(dwbc, params->out_transfer_func);
+
+	/* Program output denorm */
+	dwb3_set_denorm(dwbc, params);
+
+	if (pre_locked == 0) {
+		/* Unlock DWB registers */
+		REG_UPDATE(DWB_UPDATE_CTRL, DWB_UPDATE_LOCK, 0);
+	}
+
+	return true;
+}
+
+bool dwb3_is_enabled(struct dwbc *dwbc)
+{
+	struct dcn30_dwbc *dwbc30 = TO_DCN30_DWBC(dwbc);
+	unsigned int dwb_enabled = 0;
+	unsigned int fc_frame_capture_en = 0;
+
+	REG_GET(DWB_ENABLE_CLK_CTRL, DWB_ENABLE, &dwb_enabled);
+	REG_GET(FC_MODE_CTRL, FC_FRAME_CAPTURE_EN, &fc_frame_capture_en);
+
+	return ((dwb_enabled != 0) && (fc_frame_capture_en != 0));
+}
+
+void dwb3_set_stereo(struct dwbc *dwbc,
+		struct dwb_stereo_params *stereo_params)
+{
+	struct dcn30_dwbc *dwbc30 = TO_DCN30_DWBC(dwbc);
+
+	if (stereo_params->stereo_enabled) {
+		REG_UPDATE(FC_MODE_CTRL, FC_EYE_SELECTION,       stereo_params->stereo_eye_select);
+		REG_UPDATE(FC_MODE_CTRL, FC_STEREO_EYE_POLARITY, stereo_params->stereo_polarity);
+		DC_LOG_DWB("%s dwb stereo enabled", __func__);
+	} else {
+		REG_UPDATE(FC_MODE_CTRL, FC_EYE_SELECTION, 0);
+		DC_LOG_DWB("%s dwb stereo disabled", __func__);
+	}
+}
+
+void dwb3_set_new_content(struct dwbc *dwbc,
+						bool is_new_content)
+{
+	struct dcn30_dwbc *dwbc30 = TO_DCN30_DWBC(dwbc);
+
+	REG_UPDATE(FC_MODE_CTRL, FC_NEW_CONTENT, is_new_content);
+}
+
+void dwb3_set_denorm(struct dwbc *dwbc, struct dc_dwb_params *params)
+{
+	struct dcn30_dwbc *dwbc30 = TO_DCN30_DWBC(dwbc);
+
+	/* Set output format*/
+	REG_UPDATE(DWB_OUT_CTRL, OUT_FORMAT, params->cnv_params.fc_out_format);
+
+	/* Set output denorm */
+	if (params->cnv_params.fc_out_format == DWB_OUT_FORMAT_32BPP_ARGB ||
+			params->cnv_params.fc_out_format == DWB_OUT_FORMAT_32BPP_RGBA) {
+		REG_UPDATE(DWB_OUT_CTRL, OUT_DENORM, params->cnv_params.out_denorm_mode);
+		REG_UPDATE(DWB_OUT_CTRL, OUT_MAX,    params->cnv_params.out_max_pix_val);
+		REG_UPDATE(DWB_OUT_CTRL, OUT_MIN,    params->cnv_params.out_min_pix_val);
+	}
+}
+
+
+const struct dwbc_funcs dcn30_dwbc_funcs = {
+	.get_caps		= dwb3_get_caps,
+	.enable			= dwb3_enable,
+	.disable		= dwb3_disable,
+	.update			= dwb3_update,
+	.is_enabled		= dwb3_is_enabled,
+	.set_stereo		= dwb3_set_stereo,
+	.set_new_content	= dwb3_set_new_content,
+	.dwb_program_output_csc	= NULL,
+	.dwb_ogam_set_input_transfer_func	= dwb3_ogam_set_input_transfer_func, //TODO: rename
+	.dwb_set_scaler		= NULL,
+};
+
+void dcn30_dwbc_construct(struct dcn30_dwbc *dwbc30,
+		struct dc_context *ctx,
+		const struct dcn30_dwbc_registers *dwbc_regs,
+		const struct dcn30_dwbc_shift *dwbc_shift,
+		const struct dcn30_dwbc_mask *dwbc_mask,
+		int inst)
+{
+	dwbc30->base.ctx = ctx;
+
+	dwbc30->base.inst = inst;
+	dwbc30->base.funcs = &dcn30_dwbc_funcs;
+
+	dwbc30->dwbc_regs = dwbc_regs;
+	dwbc30->dwbc_shift = dwbc_shift;
+	dwbc30->dwbc_mask = dwbc_mask;
+}
+
+void dwb3_set_host_read_rate_control(struct dwbc *dwbc, bool host_read_delay)
+{
+	struct dcn30_dwbc *dwbc30 = TO_DCN30_DWBC(dwbc);
+
+	/*
+	 * Set maximum delay of host read access to DWBSCL LUT or OGAM LUT if there are no
+	 * idle cycles in HW pipeline (in number of clock cycles times 4)
+	 */
+	REG_UPDATE(DWB_HOST_READ_CONTROL, DWB_HOST_READ_RATE_CONTROL, host_read_delay);
+
+	DC_LOG_DWB("%s dwb3_rate_control at inst = %d", __func__, dwbc->inst);
+}