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/*

 * Copyright 2008 Advanced Micro Devices, Inc.

 * Copyright 2008 Red Hat Inc.

 * Copyright 2009 Jerome Glisse.

 *

 * 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: Dave Airlie

 *          Alex Deucher

 *          Jerome Glisse

 */

#include "drmP.h"

#include "radeon_reg.h"

#include "radeon.h"

#include "rs690r.h"

#include "atom.h"

#include "atom-bits.h"

/* rs690,rs740 depends on : */

void r100_hdp_reset(struct radeon_device *rdev);

int r300_mc_wait_for_idle(struct radeon_device *rdev);

void r420_pipes_init(struct radeon_device *rdev);

void rs400_gart_disable(struct radeon_device *rdev);

int rs400_gart_enable(struct radeon_device *rdev);

void rs400_gart_adjust_size(struct radeon_device *rdev);

void rs600_mc_disable_clients(struct radeon_device *rdev);

void rs600_disable_vga(struct radeon_device *rdev);

/* This files gather functions specifics to :

 * rs690,rs740

 *

 * Some of these functions might be used by newer ASICs.

 */

void rs690_gpu_init(struct radeon_device *rdev);

int rs690_mc_wait_for_idle(struct radeon_device *rdev);

/*

 * MC functions.

 */

int rs690_mc_init(struct radeon_device *rdev)

{

	uint32_t tmp;

	int r;

	if (r100_debugfs_rbbm_init(rdev)) {

		DRM_ERROR("Failed to register debugfs file for RBBM !\n");

	}

	rs690_gpu_init(rdev);

	rs400_gart_disable(rdev);

	/* Setup GPU memory space */

	rdev->mc.gtt_location = rdev->mc.mc_vram_size;

	rdev->mc.gtt_location += (rdev->mc.gtt_size - 1);

	rdev->mc.gtt_location &= ~(rdev->mc.gtt_size - 1);

	rdev->mc.vram_location = 0xFFFFFFFFUL;

	r = radeon_mc_setup(rdev);

	if (r) {

		return r;

	}

	/* Program GPU memory space */

	rs600_mc_disable_clients(rdev);

	if (rs690_mc_wait_for_idle(rdev)) {

		printk(KERN_WARNING "Failed to wait MC idle while "

		       "programming pipes. Bad things might happen.\n");

	}

	tmp = rdev->mc.vram_location + rdev->mc.mc_vram_size - 1;

	tmp = REG_SET(RS690_MC_FB_TOP, tmp >> 16);

	tmp |= REG_SET(RS690_MC_FB_START, rdev->mc.vram_location >> 16);

	WREG32_MC(RS690_MCCFG_FB_LOCATION, tmp);

	/* FIXME: Does this reg exist on RS480,RS740 ? */

	WREG32(0x310, rdev->mc.vram_location);

	WREG32(RS690_HDP_FB_LOCATION, rdev->mc.vram_location >> 16);

	return 0;

}

void rs690_mc_fini(struct radeon_device *rdev)

{

}

/*

 * Global GPU functions

 */

int rs690_mc_wait_for_idle(struct radeon_device *rdev)

{

	unsigned i;

	uint32_t tmp;

	for (i = 0; i < rdev->usec_timeout; i++) {

		/* read MC_STATUS */

		tmp = RREG32_MC(RS690_MC_STATUS);

		if (tmp & RS690_MC_STATUS_IDLE) {

			return 0;

		}

		DRM_UDELAY(1);

	}

	return -1;

}

void rs690_errata(struct radeon_device *rdev)

{

	rdev->pll_errata = 0;

}

void rs690_gpu_init(struct radeon_device *rdev)

{

	/* FIXME: HDP same place on rs690 ? */

	r100_hdp_reset(rdev);

	rs600_disable_vga(rdev);

	/* FIXME: is this correct ? */

	r420_pipes_init(rdev);

	if (rs690_mc_wait_for_idle(rdev)) {

		printk(KERN_WARNING "Failed to wait MC idle while "

		       "programming pipes. Bad things might happen.\n");

	}

}

/*

 * VRAM info.

 */

void rs690_pm_info(struct radeon_device *rdev)

{

	int index = GetIndexIntoMasterTable(DATA, IntegratedSystemInfo);

	struct _ATOM_INTEGRATED_SYSTEM_INFO *info;

	struct _ATOM_INTEGRATED_SYSTEM_INFO_V2 *info_v2;

	void *ptr;

	uint16_t data_offset;

	uint8_t frev, crev;

	fixed20_12 tmp;

	atom_parse_data_header(rdev->mode_info.atom_context, index, NULL,

			       &frev, &crev, &data_offset);

	ptr = rdev->mode_info.atom_context->bios + data_offset;

	info = (struct _ATOM_INTEGRATED_SYSTEM_INFO *)ptr;

	info_v2 = (struct _ATOM_INTEGRATED_SYSTEM_INFO_V2 *)ptr;

	/* Get various system informations from bios */

	switch (crev) {

	case 1:

		tmp.full = rfixed_const(100);

		rdev->pm.igp_sideport_mclk.full = rfixed_const(info->ulBootUpMemoryClock);

		rdev->pm.igp_sideport_mclk.full = rfixed_div(rdev->pm.igp_sideport_mclk, tmp);

		rdev->pm.igp_system_mclk.full = rfixed_const(le16_to_cpu(info->usK8MemoryClock));

		rdev->pm.igp_ht_link_clk.full = rfixed_const(le16_to_cpu(info->usFSBClock));

		rdev->pm.igp_ht_link_width.full = rfixed_const(info->ucHTLinkWidth);

		break;

	case 2:

		tmp.full = rfixed_const(100);

		rdev->pm.igp_sideport_mclk.full = rfixed_const(info_v2->ulBootUpSidePortClock);

		rdev->pm.igp_sideport_mclk.full = rfixed_div(rdev->pm.igp_sideport_mclk, tmp);

		rdev->pm.igp_system_mclk.full = rfixed_const(info_v2->ulBootUpUMAClock);

		rdev->pm.igp_system_mclk.full = rfixed_div(rdev->pm.igp_system_mclk, tmp);

		rdev->pm.igp_ht_link_clk.full = rfixed_const(info_v2->ulHTLinkFreq);

		rdev->pm.igp_ht_link_clk.full = rfixed_div(rdev->pm.igp_ht_link_clk, tmp);

		rdev->pm.igp_ht_link_width.full = rfixed_const(le16_to_cpu(info_v2->usMinHTLinkWidth));

		break;

	default:

		tmp.full = rfixed_const(100);

		/* We assume the slower possible clock ie worst case */

		/* DDR 333Mhz */

		rdev->pm.igp_sideport_mclk.full = rfixed_const(333);

		/* FIXME: system clock ? */

		rdev->pm.igp_system_mclk.full = rfixed_const(100);

		rdev->pm.igp_system_mclk.full = rfixed_div(rdev->pm.igp_system_mclk, tmp);

		rdev->pm.igp_ht_link_clk.full = rfixed_const(200);

		rdev->pm.igp_ht_link_width.full = rfixed_const(8);

		DRM_ERROR("No integrated system info for your GPU, using safe default\n");

		break;

	}

	/* Compute various bandwidth */

	/* k8_bandwidth = (memory_clk / 2) * 2 * 8 * 0.5 = memory_clk * 4  */

	tmp.full = rfixed_const(4);

	rdev->pm.k8_bandwidth.full = rfixed_mul(rdev->pm.igp_system_mclk, tmp);

	/* ht_bandwidth = ht_clk * 2 * ht_width / 8 * 0.8

	 *              = ht_clk * ht_width / 5

	 */

	tmp.full = rfixed_const(5);

	rdev->pm.ht_bandwidth.full = rfixed_mul(rdev->pm.igp_ht_link_clk,

						rdev->pm.igp_ht_link_width);

	rdev->pm.ht_bandwidth.full = rfixed_div(rdev->pm.ht_bandwidth, tmp);

	if (tmp.full < rdev->pm.max_bandwidth.full) {

		/* HT link is a limiting factor */

		rdev->pm.max_bandwidth.full = tmp.full;

	}

	/* sideport_bandwidth = (sideport_clk / 2) * 2 * 2 * 0.7

	 *                    = (sideport_clk * 14) / 10

	 */

	tmp.full = rfixed_const(14);

	rdev->pm.sideport_bandwidth.full = rfixed_mul(rdev->pm.igp_sideport_mclk, tmp);

	tmp.full = rfixed_const(10);

	rdev->pm.sideport_bandwidth.full = rfixed_div(rdev->pm.sideport_bandwidth, tmp);

}

void rs690_vram_info(struct radeon_device *rdev)

{

	uint32_t tmp;

	fixed20_12 a;

	rs400_gart_adjust_size(rdev);

	/* DDR for all card after R300 & IGP */

	rdev->mc.vram_is_ddr = true;

	/* FIXME: is this correct for RS690/RS740 ? */

	tmp = RREG32(RADEON_MEM_CNTL);

	if (tmp & R300_MEM_NUM_CHANNELS_MASK) {

		rdev->mc.vram_width = 128;

	} else {

		rdev->mc.vram_width = 64;

	}

	rdev->mc.real_vram_size = RREG32(RADEON_CONFIG_MEMSIZE);

	rdev->mc.mc_vram_size = rdev->mc.real_vram_size;

	rdev->mc.aper_base = drm_get_resource_start(rdev->ddev, 0);

	rdev->mc.aper_size = drm_get_resource_len(rdev->ddev, 0);

	rs690_pm_info(rdev);

	/* FIXME: we should enforce default clock in case GPU is not in

	 * default setup

	 */

	a.full = rfixed_const(100);

	rdev->pm.sclk.full = rfixed_const(rdev->clock.default_sclk);

	rdev->pm.sclk.full = rfixed_div(rdev->pm.sclk, a);

	a.full = rfixed_const(16);

	/* core_bandwidth = sclk(Mhz) * 16 */

	rdev->pm.core_bandwidth.full = rfixed_div(rdev->pm.sclk, a);

}

void rs690_line_buffer_adjust(struct radeon_device *rdev,

			      struct drm_display_mode *mode1,

			      struct drm_display_mode *mode2)

{

	u32 tmp;

	/*

	 * Line Buffer Setup

	 * There is a single line buffer shared by both display controllers.

	 * DC_LB_MEMORY_SPLIT controls how that line buffer is shared between

	 * the display controllers.  The paritioning can either be done

	 * manually or via one of four preset allocations specified in bits 1:0:

	 *  0 - line buffer is divided in half and shared between crtc

	 *  1 - D1 gets 3/4 of the line buffer, D2 gets 1/4

	 *  2 - D1 gets the whole buffer

	 *  3 - D1 gets 1/4 of the line buffer, D2 gets 3/4

	 * Setting bit 2 of DC_LB_MEMORY_SPLIT controls switches to manual

	 * allocation mode. In manual allocation mode, D1 always starts at 0,

	 * D1 end/2 is specified in bits 14:4; D2 allocation follows D1.

	 */

	tmp = RREG32(DC_LB_MEMORY_SPLIT) & ~DC_LB_MEMORY_SPLIT_MASK;

	tmp &= ~DC_LB_MEMORY_SPLIT_SHIFT_MODE;

	/* auto */

	if (mode1 && mode2) {

		if (mode1->hdisplay > mode2->hdisplay) {

			if (mode1->hdisplay > 2560)

				tmp |= DC_LB_MEMORY_SPLIT_D1_3Q_D2_1Q;

			else

				tmp |= DC_LB_MEMORY_SPLIT_D1HALF_D2HALF;

		} else if (mode2->hdisplay > mode1->hdisplay) {

			if (mode2->hdisplay > 2560)

				tmp |= DC_LB_MEMORY_SPLIT_D1_1Q_D2_3Q;

			else

				tmp |= DC_LB_MEMORY_SPLIT_D1HALF_D2HALF;

		} else

			tmp |= AVIVO_DC_LB_MEMORY_SPLIT_D1HALF_D2HALF;

	} else if (mode1) {

		tmp |= DC_LB_MEMORY_SPLIT_D1_ONLY;

	} else if (mode2) {

		tmp |= DC_LB_MEMORY_SPLIT_D1_1Q_D2_3Q;

	}

	WREG32(DC_LB_MEMORY_SPLIT, tmp);

}

struct rs690_watermark {

	u32        lb_request_fifo_depth;

	fixed20_12 num_line_pair;

	fixed20_12 estimated_width;

	fixed20_12 worst_case_latency;

	fixed20_12 consumption_rate;

	fixed20_12 active_time;

	fixed20_12 dbpp;

	fixed20_12 priority_mark_max;

	fixed20_12 priority_mark;

	fixed20_12 sclk;

};

void rs690_crtc_bandwidth_compute(struct radeon_device *rdev,

				  struct radeon_crtc *crtc,

				  struct rs690_watermark *wm)

{

	struct drm_display_mode *mode = &crtc->base.mode;

	fixed20_12 a, b, c;

	fixed20_12 pclk, request_fifo_depth, tolerable_latency, estimated_width;

	fixed20_12 consumption_time, line_time, chunk_time, read_delay_latency;

	/* FIXME: detect IGP with sideport memory, i don't think there is any

	 * such product available

	 */

	bool sideport = false;

	if (!crtc->base.enabled) {

		/* FIXME: wouldn't it better to set priority mark to maximum */

		wm->lb_request_fifo_depth = 4;

		return;

	}

	if (crtc->vsc.full > rfixed_const(2))

		wm->num_line_pair.full = rfixed_const(2);

	else

		wm->num_line_pair.full = rfixed_const(1);

	b.full = rfixed_const(mode->crtc_hdisplay);

	c.full = rfixed_const(256);

	a.full = rfixed_mul(wm->num_line_pair, b);

	request_fifo_depth.full = rfixed_div(a, c);

	if (a.full < rfixed_const(4)) {

		wm->lb_request_fifo_depth = 4;

	} else {

		wm->lb_request_fifo_depth = rfixed_trunc(request_fifo_depth);

	}

	/* Determine consumption rate

	 *  pclk = pixel clock period(ns) = 1000 / (mode.clock / 1000)

	 *  vtaps = number of vertical taps,

	 *  vsc = vertical scaling ratio, defined as source/destination

	 *  hsc = horizontal scaling ration, defined as source/destination

	 */

	a.full = rfixed_const(mode->clock);

	b.full = rfixed_const(1000);

	a.full = rfixed_div(a, b);

	pclk.full = rfixed_div(b, a);

	if (crtc->rmx_type != RMX_OFF) {

		b.full = rfixed_const(2);

		if (crtc->vsc.full > b.full)

			b.full = crtc->vsc.full;

		b.full = rfixed_mul(b, crtc->hsc);

		c.full = rfixed_const(2);

		b.full = rfixed_div(b, c);

		consumption_time.full = rfixed_div(pclk, b);

	} else {

		consumption_time.full = pclk.full;

	}

	a.full = rfixed_const(1);

	wm->consumption_rate.full = rfixed_div(a, consumption_time);

	/* Determine line time

	 *  LineTime = total time for one line of displayhtotal

	 *  LineTime = total number of horizontal pixels

	 *  pclk = pixel clock period(ns)

	 */

	a.full = rfixed_const(crtc->base.mode.crtc_htotal);

	line_time.full = rfixed_mul(a, pclk);

	/* Determine active time

	 *  ActiveTime = time of active region of display within one line,

	 *  hactive = total number of horizontal active pixels

	 *  htotal = total number of horizontal pixels

	 */

	a.full = rfixed_const(crtc->base.mode.crtc_htotal);

	b.full = rfixed_const(crtc->base.mode.crtc_hdisplay);

	wm->active_time.full = rfixed_mul(line_time, b);

	wm->active_time.full = rfixed_div(wm->active_time, a);

	/* Maximun bandwidth is the minimun bandwidth of all component */

	rdev->pm.max_bandwidth = rdev->pm.core_bandwidth;

	if (sideport) {

		if (rdev->pm.max_bandwidth.full > rdev->pm.sideport_bandwidth.full &&

			rdev->pm.sideport_bandwidth.full)

			rdev->pm.max_bandwidth = rdev->pm.sideport_bandwidth;

		read_delay_latency.full = rfixed_const(370 * 800 * 1000);

		read_delay_latency.full = rfixed_div(read_delay_latency,

			rdev->pm.igp_sideport_mclk);

	} else {

		if (rdev->pm.max_bandwidth.full > rdev->pm.k8_bandwidth.full &&

			rdev->pm.k8_bandwidth.full)

			rdev->pm.max_bandwidth = rdev->pm.k8_bandwidth;

		if (rdev->pm.max_bandwidth.full > rdev->pm.ht_bandwidth.full &&

			rdev->pm.ht_bandwidth.full)

			rdev->pm.max_bandwidth = rdev->pm.ht_bandwidth;

		read_delay_latency.full = rfixed_const(5000);

	}

	/* sclk = system clocks(ns) = 1000 / max_bandwidth / 16 */

	a.full = rfixed_const(16);

	rdev->pm.sclk.full = rfixed_mul(rdev->pm.max_bandwidth, a);

	a.full = rfixed_const(1000);

	rdev->pm.sclk.full = rfixed_div(a, rdev->pm.sclk);

	/* Determine chunk time

	 * ChunkTime = the time it takes the DCP to send one chunk of data

	 * to the LB which consists of pipeline delay and inter chunk gap

	 * sclk = system clock(ns)

	 */

	a.full = rfixed_const(256 * 13);

	chunk_time.full = rfixed_mul(rdev->pm.sclk, a);

	a.full = rfixed_const(10);

	chunk_time.full = rfixed_div(chunk_time, a);

	/* Determine the worst case latency

	 * NumLinePair = Number of line pairs to request(1=2 lines, 2=4 lines)

	 * WorstCaseLatency = worst case time from urgent to when the MC starts

	 *                    to return data

	 * READ_DELAY_IDLE_MAX = constant of 1us

	 * ChunkTime = time it takes the DCP to send one chunk of data to the LB

	 *             which consists of pipeline delay and inter chunk gap

	 */

	if (rfixed_trunc(wm->num_line_pair) > 1) {

		a.full = rfixed_const(3);

		wm->worst_case_latency.full = rfixed_mul(a, chunk_time);

		wm->worst_case_latency.full += read_delay_latency.full;

	} else {

		a.full = rfixed_const(2);

		wm->worst_case_latency.full = rfixed_mul(a, chunk_time);

		wm->worst_case_latency.full += read_delay_latency.full;

	}

	/* Determine the tolerable latency

	 * TolerableLatency = Any given request has only 1 line time

	 *                    for the data to be returned

	 * LBRequestFifoDepth = Number of chunk requests the LB can

	 *                      put into the request FIFO for a display

	 *  LineTime = total time for one line of display

	 *  ChunkTime = the time it takes the DCP to send one chunk

	 *              of data to the LB which consists of

	 *  pipeline delay and inter chunk gap

	 */

	if ((2+wm->lb_request_fifo_depth) >= rfixed_trunc(request_fifo_depth)) {

		tolerable_latency.full = line_time.full;

	} else {

		tolerable_latency.full = rfixed_const(wm->lb_request_fifo_depth - 2);

		tolerable_latency.full = request_fifo_depth.full - tolerable_latency.full;

		tolerable_latency.full = rfixed_mul(tolerable_latency, chunk_time);

		tolerable_latency.full = line_time.full - tolerable_latency.full;

	}

	/* We assume worst case 32bits (4 bytes) */

	wm->dbpp.full = rfixed_const(4 * 8);

	/* Determine the maximum priority mark

	 *  width = viewport width in pixels

	 */

	a.full = rfixed_const(16);

	wm->priority_mark_max.full = rfixed_const(crtc->base.mode.crtc_hdisplay);

	wm->priority_mark_max.full = rfixed_div(wm->priority_mark_max, a);

	/* Determine estimated width */

	estimated_width.full = tolerable_latency.full - wm->worst_case_latency.full;

	estimated_width.full = rfixed_div(estimated_width, consumption_time);

	if (rfixed_trunc(estimated_width) > crtc->base.mode.crtc_hdisplay) {

		wm->priority_mark.full = rfixed_const(10);

	} else {

		a.full = rfixed_const(16);

		wm->priority_mark.full = rfixed_div(estimated_width, a);

		wm->priority_mark.full = wm->priority_mark_max.full - wm->priority_mark.full;

	}

}

void rs690_bandwidth_update(struct radeon_device *rdev)

{

	struct drm_display_mode *mode0 = NULL;

	struct drm_display_mode *mode1 = NULL;

	struct rs690_watermark wm0;

	struct rs690_watermark wm1;

	u32 tmp;

	fixed20_12 priority_mark02, priority_mark12, fill_rate;

	fixed20_12 a, b;

	if (rdev->mode_info.crtcs[0]->base.enabled)

		mode0 = &rdev->mode_info.crtcs[0]->base.mode;

	if (rdev->mode_info.crtcs[1]->base.enabled)

		mode1 = &rdev->mode_info.crtcs[1]->base.mode;

	/*

	 * Set display0/1 priority up in the memory controller for

	 * modes if the user specifies HIGH for displaypriority

	 * option.

	 */

	if (rdev->disp_priority == 2) {

		tmp = RREG32_MC(MC_INIT_MISC_LAT_TIMER);

		tmp &= ~MC_DISP1R_INIT_LAT_MASK;

		tmp &= ~MC_DISP0R_INIT_LAT_MASK;

		if (mode1)

			tmp |= (1 << MC_DISP1R_INIT_LAT_SHIFT);

		if (mode0)

			tmp |= (1 << MC_DISP0R_INIT_LAT_SHIFT);

		WREG32_MC(MC_INIT_MISC_LAT_TIMER, tmp);

	}

	rs690_line_buffer_adjust(rdev, mode0, mode1);

	if ((rdev->family == CHIP_RS690) || (rdev->family == CHIP_RS740))

		WREG32(DCP_CONTROL, 0);

	if ((rdev->family == CHIP_RS780) || (rdev->family == CHIP_RS880))

		WREG32(DCP_CONTROL, 2);

	rs690_crtc_bandwidth_compute(rdev, rdev->mode_info.crtcs[0], &wm0);

	rs690_crtc_bandwidth_compute(rdev, rdev->mode_info.crtcs[1], &wm1);

	tmp = (wm0.lb_request_fifo_depth - 1);

	tmp |= (wm1.lb_request_fifo_depth - 1) << 16;

	WREG32(LB_MAX_REQ_OUTSTANDING, tmp);

	if (mode0 && mode1) {

		if (rfixed_trunc(wm0.dbpp) > 64)

			a.full = rfixed_mul(wm0.dbpp, wm0.num_line_pair);

		else

			a.full = wm0.num_line_pair.full;

		if (rfixed_trunc(wm1.dbpp) > 64)

			b.full = rfixed_mul(wm1.dbpp, wm1.num_line_pair);

		else

			b.full = wm1.num_line_pair.full;

		a.full += b.full;

		fill_rate.full = rfixed_div(wm0.sclk, a);

		if (wm0.consumption_rate.full > fill_rate.full) {

			b.full = wm0.consumption_rate.full - fill_rate.full;

			b.full = rfixed_mul(b, wm0.active_time);

			a.full = rfixed_mul(wm0.worst_case_latency,

						wm0.consumption_rate);

			a.full = a.full + b.full;

			b.full = rfixed_const(16 * 1000);

			priority_mark02.full = rfixed_div(a, b);

		} else {

			a.full = rfixed_mul(wm0.worst_case_latency,

						wm0.consumption_rate);

			b.full = rfixed_const(16 * 1000);

			priority_mark02.full = rfixed_div(a, b);

		}

		if (wm1.consumption_rate.full > fill_rate.full) {

			b.full = wm1.consumption_rate.full - fill_rate.full;

			b.full = rfixed_mul(b, wm1.active_time);

			a.full = rfixed_mul(wm1.worst_case_latency,

						wm1.consumption_rate);

			a.full = a.full + b.full;

			b.full = rfixed_const(16 * 1000);

			priority_mark12.full = rfixed_div(a, b);

		} else {

			a.full = rfixed_mul(wm1.worst_case_latency,

						wm1.consumption_rate);

			b.full = rfixed_const(16 * 1000);

			priority_mark12.full = rfixed_div(a, b);

		}

		if (wm0.priority_mark.full > priority_mark02.full)

			priority_mark02.full = wm0.priority_mark.full;

		if (rfixed_trunc(priority_mark02) < 0)

			priority_mark02.full = 0;

		if (wm0.priority_mark_max.full > priority_mark02.full)

			priority_mark02.full = wm0.priority_mark_max.full;

		if (wm1.priority_mark.full > priority_mark12.full)

			priority_mark12.full = wm1.priority_mark.full;

		if (rfixed_trunc(priority_mark12) < 0)

			priority_mark12.full = 0;

		if (wm1.priority_mark_max.full > priority_mark12.full)

			priority_mark12.full = wm1.priority_mark_max.full;

		WREG32(D1MODE_PRIORITY_A_CNT, rfixed_trunc(priority_mark02));

		WREG32(D1MODE_PRIORITY_B_CNT, rfixed_trunc(priority_mark02));

		WREG32(D2MODE_PRIORITY_A_CNT, rfixed_trunc(priority_mark12));

		WREG32(D2MODE_PRIORITY_B_CNT, rfixed_trunc(priority_mark12));

	} else if (mode0) {

		if (rfixed_trunc(wm0.dbpp) > 64)

			a.full = rfixed_mul(wm0.dbpp, wm0.num_line_pair);

		else

			a.full = wm0.num_line_pair.full;

		fill_rate.full = rfixed_div(wm0.sclk, a);

		if (wm0.consumption_rate.full > fill_rate.full) {

			b.full = wm0.consumption_rate.full - fill_rate.full;

			b.full = rfixed_mul(b, wm0.active_time);

			a.full = rfixed_mul(wm0.worst_case_latency,

						wm0.consumption_rate);

			a.full = a.full + b.full;

			b.full = rfixed_const(16 * 1000);

			priority_mark02.full = rfixed_div(a, b);

		} else {

			a.full = rfixed_mul(wm0.worst_case_latency,

						wm0.consumption_rate);

			b.full = rfixed_const(16 * 1000);

			priority_mark02.full = rfixed_div(a, b);

		}

		if (wm0.priority_mark.full > priority_mark02.full)

			priority_mark02.full = wm0.priority_mark.full;

		if (rfixed_trunc(priority_mark02) < 0)

			priority_mark02.full = 0;

		if (wm0.priority_mark_max.full > priority_mark02.full)

			priority_mark02.full = wm0.priority_mark_max.full;

		WREG32(D1MODE_PRIORITY_A_CNT, rfixed_trunc(priority_mark02));

		WREG32(D1MODE_PRIORITY_B_CNT, rfixed_trunc(priority_mark02));

		WREG32(D2MODE_PRIORITY_A_CNT, MODE_PRIORITY_OFF);

		WREG32(D2MODE_PRIORITY_B_CNT, MODE_PRIORITY_OFF);

	} else {

		if (rfixed_trunc(wm1.dbpp) > 64)

			a.full = rfixed_mul(wm1.dbpp, wm1.num_line_pair);

		else

			a.full = wm1.num_line_pair.full;

		fill_rate.full = rfixed_div(wm1.sclk, a);

		if (wm1.consumption_rate.full > fill_rate.full) {

			b.full = wm1.consumption_rate.full - fill_rate.full;

			b.full = rfixed_mul(b, wm1.active_time);

			a.full = rfixed_mul(wm1.worst_case_latency,

						wm1.consumption_rate);

			a.full = a.full + b.full;

			b.full = rfixed_const(16 * 1000);

			priority_mark12.full = rfixed_div(a, b);

		} else {

			a.full = rfixed_mul(wm1.worst_case_latency,

						wm1.consumption_rate);

			b.full = rfixed_const(16 * 1000);

			priority_mark12.full = rfixed_div(a, b);

		}

		if (wm1.priority_mark.full > priority_mark12.full)

			priority_mark12.full = wm1.priority_mark.full;

		if (rfixed_trunc(priority_mark12) < 0)

			priority_mark12.full = 0;

		if (wm1.priority_mark_max.full > priority_mark12.full)

			priority_mark12.full = wm1.priority_mark_max.full;

		WREG32(D1MODE_PRIORITY_A_CNT, MODE_PRIORITY_OFF);

		WREG32(D1MODE_PRIORITY_B_CNT, MODE_PRIORITY_OFF);

		WREG32(D2MODE_PRIORITY_A_CNT, rfixed_trunc(priority_mark12));

		WREG32(D2MODE_PRIORITY_B_CNT, rfixed_trunc(priority_mark12));

	}

}

/*

 * Indirect registers accessor

 */

uint32_t rs690_mc_rreg(struct radeon_device *rdev, uint32_t reg)

{

	uint32_t r;

	WREG32(RS690_MC_INDEX, (reg & RS690_MC_INDEX_MASK));

	r = RREG32(RS690_MC_DATA);

	WREG32(RS690_MC_INDEX, RS690_MC_INDEX_MASK);

	return r;

}

void rs690_mc_wreg(struct radeon_device *rdev, uint32_t reg, uint32_t v)

{

	WREG32(RS690_MC_INDEX,

	       RS690_MC_INDEX_WR_EN | ((reg) & RS690_MC_INDEX_MASK));

	WREG32(RS690_MC_DATA, v);

	WREG32(RS690_MC_INDEX, RS690_MC_INDEX_WR_ACK);

}