linux/drivers/gpu/drm/amd/display/dc/hubp/dcn21/dcn21_hubp.c

/*
* Copyright 2018 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 "dcn10/dcn10_hubp.h"
#include "dcn21_hubp.h"

#include "dm_services.h"
#include "reg_helper.h"

#include "dc_dmub_srv.h"

#define DC_LOGGER …
#define DC_LOGGER_INIT(logger) …

#define REG(reg) …

#define CTX …

#undef FN
#define FN(reg_name, field_name) …

/*
 * In DCN2.1, the non-double buffered version of the following 4 DLG registers are used in RTL.
 * As a result, if S/W updates any of these registers during a mode change,
 * the current frame before the mode change will use the new value right away
 * and can lead to generating incorrect request deadlines and incorrect TTU/QoS behavior.
 *
 * REFCYC_PER_VM_GROUP_FLIP[22:0]
 * REFCYC_PER_VM_GROUP_VBLANK[22:0]
 * REFCYC_PER_VM_REQ_FLIP[22:0]
 * REFCYC_PER_VM_REQ_VBLANK[22:0]
 *
 * REFCYC_PER_VM_*_FLIP affects the deadline of the VM requests generated
 * when flipping to a new surface
 *
 * REFCYC_PER_VM_*_VBLANK affects the deadline of the VM requests generated
 * during prefetch  period of a frame. The prefetch starts at a pre-determined
 * number of lines before the display active per frame
 *
 * DCN may underflow due to incorrectly programming these registers
 * during VM stage of prefetch/iflip. First lines of display active
 * or a sub-region of active using a new surface will be corrupted
 * until the VM data returns at flip/mode change transitions
 *
 * Work around:
 * workaround is always opt to use the more aggressive settings.
 * On any mode switch, if the new reg values are smaller than the current values,
 * then update the regs with the new values.
 *
 * Link to the ticket: http://ontrack-internal.amd.com/browse/DEDCN21-142
 *
 */
void apply_DEDCN21_142_wa_for_hostvm_deadline(
		struct hubp *hubp,
		struct _vcs_dpi_display_dlg_regs_st *dlg_attr)
{ … }

void hubp21_program_deadline(
		struct hubp *hubp,
		struct _vcs_dpi_display_dlg_regs_st *dlg_attr,
		struct _vcs_dpi_display_ttu_regs_st *ttu_attr)
{ … }

void hubp21_program_requestor(
		struct hubp *hubp,
		struct _vcs_dpi_display_rq_regs_st *rq_regs)
{ … }

static void hubp21_setup(
		struct hubp *hubp,
		struct _vcs_dpi_display_dlg_regs_st *dlg_attr,
		struct _vcs_dpi_display_ttu_regs_st *ttu_attr,
		struct _vcs_dpi_display_rq_regs_st *rq_regs,
		struct _vcs_dpi_display_pipe_dest_params_st *pipe_dest)
{ … }

static void hubp21_set_viewport(
	struct hubp *hubp,
	const struct rect *viewport,
	const struct rect *viewport_c)
{ … }

static void hubp21_set_vm_system_aperture_settings(struct hubp *hubp,
						   struct vm_system_aperture_param *apt)
{ … }

static void hubp21_validate_dml_output(struct hubp *hubp,
		struct dc_context *ctx,
		struct _vcs_dpi_display_rq_regs_st *dml_rq_regs,
		struct _vcs_dpi_display_dlg_regs_st *dml_dlg_attr,
		struct _vcs_dpi_display_ttu_regs_st *dml_ttu_attr)
{ … }

static void program_surface_flip_and_addr(struct hubp *hubp, struct surface_flip_registers *flip_regs)
{ … }

static void dmcub_PLAT_54186_wa(struct hubp *hubp,
				struct surface_flip_registers *flip_regs)
{ … }

static bool hubp21_program_surface_flip_and_addr(
		struct hubp *hubp,
		const struct dc_plane_address *address,
		bool flip_immediate)
{ … }

static void hubp21_init(struct hubp *hubp)
{ … }
static struct hubp_funcs dcn21_hubp_funcs = …;

bool hubp21_construct(
	struct dcn21_hubp *hubp21,
	struct dc_context *ctx,
	uint32_t inst,
	const struct dcn_hubp2_registers *hubp_regs,
	const struct dcn_hubp2_shift *hubp_shift,
	const struct dcn_hubp2_mask *hubp_mask)
{ … }