OpenCloudOS-Kernel/drivers/gpu/drm/radeon/atombios_crtc.c

/*
 * Copyright 2007-8 Advanced Micro Devices, Inc.
 * Copyright 2008 Red Hat 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: Dave Airlie
 *          Alex Deucher
 */
#include <drm/drmP.h>
#include <drm/drm_crtc_helper.h>
#include <drm/radeon_drm.h>
#include "radeon_fixed.h"
#include "radeon.h"
#include "atom.h"
#include "atom-bits.h"

static void atombios_overscan_setup(struct drm_crtc *crtc,
				    struct drm_display_mode *mode,
				    struct drm_display_mode *adjusted_mode)
{
	struct drm_device *dev = crtc->dev;
	struct radeon_device *rdev = dev->dev_private;
	struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
	SET_CRTC_OVERSCAN_PS_ALLOCATION args;
	int index = GetIndexIntoMasterTable(COMMAND, SetCRTC_OverScan);
	int a1, a2;

	memset(&args, 0, sizeof(args));

	args.usOverscanRight = 0;
	args.usOverscanLeft = 0;
	args.usOverscanBottom = 0;
	args.usOverscanTop = 0;
	args.ucCRTC = radeon_crtc->crtc_id;

	switch (radeon_crtc->rmx_type) {
	case RMX_CENTER:
		args.usOverscanTop = (adjusted_mode->crtc_vdisplay - mode->crtc_vdisplay) / 2;
		args.usOverscanBottom = (adjusted_mode->crtc_vdisplay - mode->crtc_vdisplay) / 2;
		args.usOverscanLeft = (adjusted_mode->crtc_hdisplay - mode->crtc_hdisplay) / 2;
		args.usOverscanRight = (adjusted_mode->crtc_hdisplay - mode->crtc_hdisplay) / 2;
		atom_execute_table(rdev->mode_info.atom_context, index, (uint32_t *)&args);
		break;
	case RMX_ASPECT:
		a1 = mode->crtc_vdisplay * adjusted_mode->crtc_hdisplay;
		a2 = adjusted_mode->crtc_vdisplay * mode->crtc_hdisplay;

		if (a1 > a2) {
			args.usOverscanLeft = (adjusted_mode->crtc_hdisplay - (a2 / mode->crtc_vdisplay)) / 2;
			args.usOverscanRight = (adjusted_mode->crtc_hdisplay - (a2 / mode->crtc_vdisplay)) / 2;
		} else if (a2 > a1) {
			args.usOverscanLeft = (adjusted_mode->crtc_vdisplay - (a1 / mode->crtc_hdisplay)) / 2;
			args.usOverscanRight = (adjusted_mode->crtc_vdisplay - (a1 / mode->crtc_hdisplay)) / 2;
		}
		atom_execute_table(rdev->mode_info.atom_context, index, (uint32_t *)&args);
		break;
	case RMX_FULL:
	default:
		args.usOverscanRight = 0;
		args.usOverscanLeft = 0;
		args.usOverscanBottom = 0;
		args.usOverscanTop = 0;
		atom_execute_table(rdev->mode_info.atom_context, index, (uint32_t *)&args);
		break;
	}
}

static void atombios_scaler_setup(struct drm_crtc *crtc)
{
	struct drm_device *dev = crtc->dev;
	struct radeon_device *rdev = dev->dev_private;
	struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
	ENABLE_SCALER_PS_ALLOCATION args;
	int index = GetIndexIntoMasterTable(COMMAND, EnableScaler);

	/* fixme - fill in enc_priv for atom dac */
	enum radeon_tv_std tv_std = TV_STD_NTSC;
	bool is_tv = false, is_cv = false;
	struct drm_encoder *encoder;

	if (!ASIC_IS_AVIVO(rdev) && radeon_crtc->crtc_id)
		return;

	list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
		/* find tv std */
		if (encoder->crtc == crtc) {
			struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
			if (radeon_encoder->active_device & ATOM_DEVICE_TV_SUPPORT) {
				struct radeon_encoder_atom_dac *tv_dac = radeon_encoder->enc_priv;
				tv_std = tv_dac->tv_std;
				is_tv = true;
			}
		}
	}

	memset(&args, 0, sizeof(args));

	args.ucScaler = radeon_crtc->crtc_id;

	if (is_tv) {
		switch (tv_std) {
		case TV_STD_NTSC:
		default:
			args.ucTVStandard = ATOM_TV_NTSC;
			break;
		case TV_STD_PAL:
			args.ucTVStandard = ATOM_TV_PAL;
			break;
		case TV_STD_PAL_M:
			args.ucTVStandard = ATOM_TV_PALM;
			break;
		case TV_STD_PAL_60:
			args.ucTVStandard = ATOM_TV_PAL60;
			break;
		case TV_STD_NTSC_J:
			args.ucTVStandard = ATOM_TV_NTSCJ;
			break;
		case TV_STD_SCART_PAL:
			args.ucTVStandard = ATOM_TV_PAL; /* ??? */
			break;
		case TV_STD_SECAM:
			args.ucTVStandard = ATOM_TV_SECAM;
			break;
		case TV_STD_PAL_CN:
			args.ucTVStandard = ATOM_TV_PALCN;
			break;
		}
		args.ucEnable = SCALER_ENABLE_MULTITAP_MODE;
	} else if (is_cv) {
		args.ucTVStandard = ATOM_TV_CV;
		args.ucEnable = SCALER_ENABLE_MULTITAP_MODE;
	} else {
		switch (radeon_crtc->rmx_type) {
		case RMX_FULL:
			args.ucEnable = ATOM_SCALER_EXPANSION;
			break;
		case RMX_CENTER:
			args.ucEnable = ATOM_SCALER_CENTER;
			break;
		case RMX_ASPECT:
			args.ucEnable = ATOM_SCALER_EXPANSION;
			break;
		default:
			if (ASIC_IS_AVIVO(rdev))
				args.ucEnable = ATOM_SCALER_DISABLE;
			else
				args.ucEnable = ATOM_SCALER_CENTER;
			break;
		}
	}
	atom_execute_table(rdev->mode_info.atom_context, index, (uint32_t *)&args);
	if ((is_tv || is_cv)
	    && rdev->family >= CHIP_RV515 && rdev->family <= CHIP_R580) {
		atom_rv515_force_tv_scaler(rdev, radeon_crtc);
	}
}

static void atombios_lock_crtc(struct drm_crtc *crtc, int lock)
{
	struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
	struct drm_device *dev = crtc->dev;
	struct radeon_device *rdev = dev->dev_private;
	int index =
	    GetIndexIntoMasterTable(COMMAND, UpdateCRTC_DoubleBufferRegisters);
	ENABLE_CRTC_PS_ALLOCATION args;

	memset(&args, 0, sizeof(args));

	args.ucCRTC = radeon_crtc->crtc_id;
	args.ucEnable = lock;

	atom_execute_table(rdev->mode_info.atom_context, index, (uint32_t *)&args);
}

static void atombios_enable_crtc(struct drm_crtc *crtc, int state)
{
	struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
	struct drm_device *dev = crtc->dev;
	struct radeon_device *rdev = dev->dev_private;
	int index = GetIndexIntoMasterTable(COMMAND, EnableCRTC);
	ENABLE_CRTC_PS_ALLOCATION args;

	memset(&args, 0, sizeof(args));

	args.ucCRTC = radeon_crtc->crtc_id;
	args.ucEnable = state;

	atom_execute_table(rdev->mode_info.atom_context, index, (uint32_t *)&args);
}

static void atombios_enable_crtc_memreq(struct drm_crtc *crtc, int state)
{
	struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
	struct drm_device *dev = crtc->dev;
	struct radeon_device *rdev = dev->dev_private;
	int index = GetIndexIntoMasterTable(COMMAND, EnableCRTCMemReq);
	ENABLE_CRTC_PS_ALLOCATION args;

	memset(&args, 0, sizeof(args));

	args.ucCRTC = radeon_crtc->crtc_id;
	args.ucEnable = state;

	atom_execute_table(rdev->mode_info.atom_context, index, (uint32_t *)&args);
}

static void atombios_blank_crtc(struct drm_crtc *crtc, int state)
{
	struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
	struct drm_device *dev = crtc->dev;
	struct radeon_device *rdev = dev->dev_private;
	int index = GetIndexIntoMasterTable(COMMAND, BlankCRTC);
	BLANK_CRTC_PS_ALLOCATION args;

	memset(&args, 0, sizeof(args));

	args.ucCRTC = radeon_crtc->crtc_id;
	args.ucBlanking = state;

	atom_execute_table(rdev->mode_info.atom_context, index, (uint32_t *)&args);
}

void atombios_crtc_dpms(struct drm_crtc *crtc, int mode)
{
	struct drm_device *dev = crtc->dev;
	struct radeon_device *rdev = dev->dev_private;
	struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);

	switch (mode) {
	case DRM_MODE_DPMS_ON:
		atombios_enable_crtc(crtc, 1);
		if (ASIC_IS_DCE3(rdev))
			atombios_enable_crtc_memreq(crtc, 1);
		atombios_blank_crtc(crtc, 0);
		/* XXX re-enable when interrupt support is added */
		if (!ASIC_IS_DCE4(rdev))
			drm_vblank_post_modeset(dev, radeon_crtc->crtc_id);
		radeon_crtc_load_lut(crtc);
		break;
	case DRM_MODE_DPMS_STANDBY:
	case DRM_MODE_DPMS_SUSPEND:
	case DRM_MODE_DPMS_OFF:
		/* XXX re-enable when interrupt support is added */
		if (!ASIC_IS_DCE4(rdev))
			drm_vblank_pre_modeset(dev, radeon_crtc->crtc_id);
		atombios_blank_crtc(crtc, 1);
		if (ASIC_IS_DCE3(rdev))
			atombios_enable_crtc_memreq(crtc, 0);
		atombios_enable_crtc(crtc, 0);
		break;
	}
}

static void
atombios_set_crtc_dtd_timing(struct drm_crtc *crtc,
			     struct drm_display_mode *mode)
{
	struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
	struct drm_device *dev = crtc->dev;
	struct radeon_device *rdev = dev->dev_private;
	SET_CRTC_USING_DTD_TIMING_PARAMETERS args;
	int index = GetIndexIntoMasterTable(COMMAND, SetCRTC_UsingDTDTiming);
	u16 misc = 0;

	memset(&args, 0, sizeof(args));
	args.usH_Size = cpu_to_le16(mode->crtc_hdisplay);
	args.usH_Blanking_Time =
		cpu_to_le16(mode->crtc_hblank_end - mode->crtc_hdisplay);
	args.usV_Size = cpu_to_le16(mode->crtc_vdisplay);
	args.usV_Blanking_Time =
	    cpu_to_le16(mode->crtc_vblank_end - mode->crtc_vdisplay);
	args.usH_SyncOffset =
		cpu_to_le16(mode->crtc_hsync_start - mode->crtc_hdisplay);
	args.usH_SyncWidth =
		cpu_to_le16(mode->crtc_hsync_end - mode->crtc_hsync_start);
	args.usV_SyncOffset =
		cpu_to_le16(mode->crtc_vsync_start - mode->crtc_vdisplay);
	args.usV_SyncWidth =
		cpu_to_le16(mode->crtc_vsync_end - mode->crtc_vsync_start);
	/*args.ucH_Border = mode->hborder;*/
	/*args.ucV_Border = mode->vborder;*/

	if (mode->flags & DRM_MODE_FLAG_NVSYNC)
		misc |= ATOM_VSYNC_POLARITY;
	if (mode->flags & DRM_MODE_FLAG_NHSYNC)
		misc |= ATOM_HSYNC_POLARITY;
	if (mode->flags & DRM_MODE_FLAG_CSYNC)
		misc |= ATOM_COMPOSITESYNC;
	if (mode->flags & DRM_MODE_FLAG_INTERLACE)
		misc |= ATOM_INTERLACE;
	if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
		misc |= ATOM_DOUBLE_CLOCK_MODE;

	args.susModeMiscInfo.usAccess = cpu_to_le16(misc);
	args.ucCRTC = radeon_crtc->crtc_id;

	atom_execute_table(rdev->mode_info.atom_context, index, (uint32_t *)&args);
}

static void atombios_crtc_set_timing(struct drm_crtc *crtc,
				     struct drm_display_mode *mode)
{
	struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
	struct drm_device *dev = crtc->dev;
	struct radeon_device *rdev = dev->dev_private;
	SET_CRTC_TIMING_PARAMETERS_PS_ALLOCATION args;
	int index = GetIndexIntoMasterTable(COMMAND, SetCRTC_Timing);
	u16 misc = 0;

	memset(&args, 0, sizeof(args));
	args.usH_Total = cpu_to_le16(mode->crtc_htotal);
	args.usH_Disp = cpu_to_le16(mode->crtc_hdisplay);
	args.usH_SyncStart = cpu_to_le16(mode->crtc_hsync_start);
	args.usH_SyncWidth =
		cpu_to_le16(mode->crtc_hsync_end - mode->crtc_hsync_start);
	args.usV_Total = cpu_to_le16(mode->crtc_vtotal);
	args.usV_Disp = cpu_to_le16(mode->crtc_vdisplay);
	args.usV_SyncStart = cpu_to_le16(mode->crtc_vsync_start);
	args.usV_SyncWidth =
		cpu_to_le16(mode->crtc_vsync_end - mode->crtc_vsync_start);

	if (mode->flags & DRM_MODE_FLAG_NVSYNC)
		misc |= ATOM_VSYNC_POLARITY;
	if (mode->flags & DRM_MODE_FLAG_NHSYNC)
		misc |= ATOM_HSYNC_POLARITY;
	if (mode->flags & DRM_MODE_FLAG_CSYNC)
		misc |= ATOM_COMPOSITESYNC;
	if (mode->flags & DRM_MODE_FLAG_INTERLACE)
		misc |= ATOM_INTERLACE;
	if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
		misc |= ATOM_DOUBLE_CLOCK_MODE;

	args.susModeMiscInfo.usAccess = cpu_to_le16(misc);
	args.ucCRTC = radeon_crtc->crtc_id;

	atom_execute_table(rdev->mode_info.atom_context, index, (uint32_t *)&args);
}

union atom_enable_ss {
	ENABLE_LVDS_SS_PARAMETERS legacy;
	ENABLE_SPREAD_SPECTRUM_ON_PPLL_PS_ALLOCATION v1;
};

static void atombios_set_ss(struct drm_crtc *crtc, int enable)
{
	struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
	struct drm_device *dev = crtc->dev;
	struct radeon_device *rdev = dev->dev_private;
	struct drm_encoder *encoder = NULL;
	struct radeon_encoder *radeon_encoder = NULL;
	struct radeon_encoder_atom_dig *dig = NULL;
	int index = GetIndexIntoMasterTable(COMMAND, EnableSpreadSpectrumOnPPLL);
	union atom_enable_ss args;
	uint16_t percentage = 0;
	uint8_t type = 0, step = 0, delay = 0, range = 0;

	/* XXX add ss support for DCE4 */
	if (ASIC_IS_DCE4(rdev))
		return;

	list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
		if (encoder->crtc == crtc) {
			radeon_encoder = to_radeon_encoder(encoder);
			/* only enable spread spectrum on LVDS */
			if (radeon_encoder->devices & (ATOM_DEVICE_LCD_SUPPORT)) {
				dig = radeon_encoder->enc_priv;
				if (dig && dig->ss) {
					percentage = dig->ss->percentage;
					type = dig->ss->type;
					step = dig->ss->step;
					delay = dig->ss->delay;
					range = dig->ss->range;
				} else if (enable)
					return;
			} else if (enable)
				return;
			break;
		}
	}

	if (!radeon_encoder)
		return;

	memset(&args, 0, sizeof(args));
	if (ASIC_IS_AVIVO(rdev)) {
		args.v1.usSpreadSpectrumPercentage = cpu_to_le16(percentage);
		args.v1.ucSpreadSpectrumType = type;
		args.v1.ucSpreadSpectrumStep = step;
		args.v1.ucSpreadSpectrumDelay = delay;
		args.v1.ucSpreadSpectrumRange = range;
		args.v1.ucPpll = radeon_crtc->crtc_id ? ATOM_PPLL2 : ATOM_PPLL1;
		args.v1.ucEnable = enable;
	} else {
		args.legacy.usSpreadSpectrumPercentage = cpu_to_le16(percentage);
		args.legacy.ucSpreadSpectrumType = type;
		args.legacy.ucSpreadSpectrumStepSize_Delay = (step & 3) << 2;
		args.legacy.ucSpreadSpectrumStepSize_Delay |= (delay & 7) << 4;
		args.legacy.ucEnable = enable;
	}
	atom_execute_table(rdev->mode_info.atom_context, index, (uint32_t *)&args);
}

union adjust_pixel_clock {
	ADJUST_DISPLAY_PLL_PS_ALLOCATION v1;
	ADJUST_DISPLAY_PLL_PS_ALLOCATION_V3 v3;
};

static u32 atombios_adjust_pll(struct drm_crtc *crtc,
			       struct drm_display_mode *mode,
			       struct radeon_pll *pll)
{
	struct drm_device *dev = crtc->dev;
	struct radeon_device *rdev = dev->dev_private;
	struct drm_encoder *encoder = NULL;
	struct radeon_encoder *radeon_encoder = NULL;
	u32 adjusted_clock = mode->clock;
	int encoder_mode = 0;

	/* reset the pll flags */
	pll->flags = 0;

	/* select the PLL algo */
	if (ASIC_IS_AVIVO(rdev)) {
		if (radeon_new_pll)
			pll->algo = PLL_ALGO_AVIVO;
		else
			pll->algo = PLL_ALGO_LEGACY;
	} else
		pll->algo = PLL_ALGO_LEGACY;

	if (ASIC_IS_AVIVO(rdev)) {
		if ((rdev->family == CHIP_RS600) ||
		    (rdev->family == CHIP_RS690) ||
		    (rdev->family == CHIP_RS740))
			pll->flags |= (RADEON_PLL_USE_FRAC_FB_DIV |
				       RADEON_PLL_PREFER_CLOSEST_LOWER);

		if (ASIC_IS_DCE32(rdev) && mode->clock > 200000)	/* range limits??? */
			pll->flags |= RADEON_PLL_PREFER_HIGH_FB_DIV;
		else
			pll->flags |= RADEON_PLL_PREFER_LOW_REF_DIV;
	} else {
		pll->flags |= RADEON_PLL_LEGACY;

		if (mode->clock > 200000)	/* range limits??? */
			pll->flags |= RADEON_PLL_PREFER_HIGH_FB_DIV;
		else
			pll->flags |= RADEON_PLL_PREFER_LOW_REF_DIV;

	}

	list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
		if (encoder->crtc == crtc) {
			radeon_encoder = to_radeon_encoder(encoder);
			encoder_mode = atombios_get_encoder_mode(encoder);
			if (ASIC_IS_AVIVO(rdev)) {
				/* DVO wants 2x pixel clock if the DVO chip is in 12 bit mode */
				if (radeon_encoder->encoder_id == ENCODER_OBJECT_ID_INTERNAL_KLDSCP_DVO1)
					adjusted_clock = mode->clock * 2;
				/* LVDS PLL quirks */
				if (encoder->encoder_type == DRM_MODE_ENCODER_LVDS) {
					struct radeon_encoder_atom_dig *dig = radeon_encoder->enc_priv;
					pll->algo = dig->pll_algo;
				}
			} else {
				if (encoder->encoder_type != DRM_MODE_ENCODER_DAC)
					pll->flags |= RADEON_PLL_NO_ODD_POST_DIV;
				if (encoder->encoder_type == DRM_MODE_ENCODER_LVDS)
					pll->flags |= RADEON_PLL_USE_REF_DIV;
			}
			break;
		}
	}

	/* DCE3+ has an AdjustDisplayPll that will adjust the pixel clock
	 * accordingly based on the encoder/transmitter to work around
	 * special hw requirements.
	 */
	if (ASIC_IS_DCE3(rdev)) {
		union adjust_pixel_clock args;
		u8 frev, crev;
		int index;

		index = GetIndexIntoMasterTable(COMMAND, AdjustDisplayPll);
		atom_parse_cmd_header(rdev->mode_info.atom_context, index, &frev,
				      &crev);

		memset(&args, 0, sizeof(args));

		switch (frev) {
		case 1:
			switch (crev) {
			case 1:
			case 2:
				args.v1.usPixelClock = cpu_to_le16(mode->clock / 10);
				args.v1.ucTransmitterID = radeon_encoder->encoder_id;
				args.v1.ucEncodeMode = encoder_mode;

				atom_execute_table(rdev->mode_info.atom_context,
						   index, (uint32_t *)&args);
				adjusted_clock = le16_to_cpu(args.v1.usPixelClock) * 10;
				break;
			case 3:
				args.v3.sInput.usPixelClock = cpu_to_le16(mode->clock / 10);
				args.v3.sInput.ucTransmitterID = radeon_encoder->encoder_id;
				args.v3.sInput.ucEncodeMode = encoder_mode;
				args.v3.sInput.ucDispPllConfig = 0;
				if (radeon_encoder->devices & (ATOM_DEVICE_DFP_SUPPORT)) {
					struct radeon_encoder_atom_dig *dig = radeon_encoder->enc_priv;

					if (encoder_mode == ATOM_ENCODER_MODE_DP)
						args.v3.sInput.ucDispPllConfig |=
							DISPPLL_CONFIG_COHERENT_MODE;
					else {
						if (dig->coherent_mode)
							args.v3.sInput.ucDispPllConfig |=
								DISPPLL_CONFIG_COHERENT_MODE;
						if (mode->clock > 165000)
							args.v3.sInput.ucDispPllConfig |=
								DISPPLL_CONFIG_DUAL_LINK;
					}
				} else if (radeon_encoder->devices & (ATOM_DEVICE_LCD_SUPPORT)) {
					/* may want to enable SS on DP/eDP eventually */
					args.v3.sInput.ucDispPllConfig |=
						DISPPLL_CONFIG_SS_ENABLE;
					if (mode->clock > 165000)
						args.v3.sInput.ucDispPllConfig |=
							DISPPLL_CONFIG_DUAL_LINK;
				}
				atom_execute_table(rdev->mode_info.atom_context,
						   index, (uint32_t *)&args);
				adjusted_clock = le32_to_cpu(args.v3.sOutput.ulDispPllFreq) * 10;
				if (args.v3.sOutput.ucRefDiv) {
					pll->flags |= RADEON_PLL_USE_REF_DIV;
					pll->reference_div = args.v3.sOutput.ucRefDiv;
				}
				if (args.v3.sOutput.ucPostDiv) {
					pll->flags |= RADEON_PLL_USE_POST_DIV;
					pll->post_div = args.v3.sOutput.ucPostDiv;
				}
				break;
			default:
				DRM_ERROR("Unknown table version %d %d\n", frev, crev);
				return adjusted_clock;
			}
			break;
		default:
			DRM_ERROR("Unknown table version %d %d\n", frev, crev);
			return adjusted_clock;
		}
	}
	return adjusted_clock;
}

union set_pixel_clock {
	SET_PIXEL_CLOCK_PS_ALLOCATION base;
	PIXEL_CLOCK_PARAMETERS v1;
	PIXEL_CLOCK_PARAMETERS_V2 v2;
	PIXEL_CLOCK_PARAMETERS_V3 v3;
	PIXEL_CLOCK_PARAMETERS_V5 v5;
};

static void atombios_crtc_set_dcpll(struct drm_crtc *crtc)
{
	struct drm_device *dev = crtc->dev;
	struct radeon_device *rdev = dev->dev_private;
	u8 frev, crev;
	int index;
	union set_pixel_clock args;

	memset(&args, 0, sizeof(args));

	index = GetIndexIntoMasterTable(COMMAND, SetPixelClock);
	atom_parse_cmd_header(rdev->mode_info.atom_context, index, &frev,
			      &crev);

	switch (frev) {
	case 1:
		switch (crev) {
		case 5:
			/* if the default dcpll clock is specified,
			 * SetPixelClock provides the dividers
			 */
			args.v5.ucCRTC = ATOM_CRTC_INVALID;
			args.v5.usPixelClock = rdev->clock.default_dispclk;
			args.v5.ucPpll = ATOM_DCPLL;
			break;
		default:
			DRM_ERROR("Unknown table version %d %d\n", frev, crev);
			return;
		}
		break;
	default:
		DRM_ERROR("Unknown table version %d %d\n", frev, crev);
		return;
	}
	atom_execute_table(rdev->mode_info.atom_context, index, (uint32_t *)&args);
}

static void atombios_crtc_set_pll(struct drm_crtc *crtc, struct drm_display_mode *mode)
{
	struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
	struct drm_device *dev = crtc->dev;
	struct radeon_device *rdev = dev->dev_private;
	struct drm_encoder *encoder = NULL;
	struct radeon_encoder *radeon_encoder = NULL;
	u8 frev, crev;
	int index;
	union set_pixel_clock args;
	u32 pll_clock = mode->clock;
	u32 ref_div = 0, fb_div = 0, frac_fb_div = 0, post_div = 0;
	struct radeon_pll *pll;
	u32 adjusted_clock;
	int encoder_mode = 0;

	memset(&args, 0, sizeof(args));

	list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
		if (encoder->crtc == crtc) {
			radeon_encoder = to_radeon_encoder(encoder);
			encoder_mode = atombios_get_encoder_mode(encoder);
			break;
		}
	}

	if (!radeon_encoder)
		return;

	switch (radeon_crtc->pll_id) {
	case ATOM_PPLL1:
		pll = &rdev->clock.p1pll;
		break;
	case ATOM_PPLL2:
		pll = &rdev->clock.p2pll;
		break;
	case ATOM_DCPLL:
	case ATOM_PPLL_INVALID:
		pll = &rdev->clock.dcpll;
		break;
	}

	/* adjust pixel clock as needed */
	adjusted_clock = atombios_adjust_pll(crtc, mode, pll);

	radeon_compute_pll(pll, adjusted_clock, &pll_clock, &fb_div, &frac_fb_div,
			   &ref_div, &post_div);

	index = GetIndexIntoMasterTable(COMMAND, SetPixelClock);
	atom_parse_cmd_header(rdev->mode_info.atom_context, index, &frev,
			      &crev);

	switch (frev) {
	case 1:
		switch (crev) {
		case 1:
			args.v1.usPixelClock = cpu_to_le16(mode->clock / 10);
			args.v1.usRefDiv = cpu_to_le16(ref_div);
			args.v1.usFbDiv = cpu_to_le16(fb_div);
			args.v1.ucFracFbDiv = frac_fb_div;
			args.v1.ucPostDiv = post_div;
			args.v1.ucPpll = radeon_crtc->pll_id;
			args.v1.ucCRTC = radeon_crtc->crtc_id;
			args.v1.ucRefDivSrc = 1;
			break;
		case 2:
			args.v2.usPixelClock = cpu_to_le16(mode->clock / 10);
			args.v2.usRefDiv = cpu_to_le16(ref_div);
			args.v2.usFbDiv = cpu_to_le16(fb_div);
			args.v2.ucFracFbDiv = frac_fb_div;
			args.v2.ucPostDiv = post_div;
			args.v2.ucPpll = radeon_crtc->pll_id;
			args.v2.ucCRTC = radeon_crtc->crtc_id;
			args.v2.ucRefDivSrc = 1;
			break;
		case 3:
			args.v3.usPixelClock = cpu_to_le16(mode->clock / 10);
			args.v3.usRefDiv = cpu_to_le16(ref_div);
			args.v3.usFbDiv = cpu_to_le16(fb_div);
			args.v3.ucFracFbDiv = frac_fb_div;
			args.v3.ucPostDiv = post_div;
			args.v3.ucPpll = radeon_crtc->pll_id;
			args.v3.ucMiscInfo = (radeon_crtc->pll_id << 2);
			args.v3.ucTransmitterId = radeon_encoder->encoder_id;
			args.v3.ucEncoderMode = encoder_mode;
			break;
		case 5:
			args.v5.ucCRTC = radeon_crtc->crtc_id;
			args.v5.usPixelClock = cpu_to_le16(mode->clock / 10);
			args.v5.ucRefDiv = ref_div;
			args.v5.usFbDiv = cpu_to_le16(fb_div);
			args.v5.ulFbDivDecFrac = cpu_to_le32(frac_fb_div * 100000);
			args.v5.ucPostDiv = post_div;
			args.v5.ucMiscInfo = 0; /* HDMI depth, etc. */
			args.v5.ucTransmitterID = radeon_encoder->encoder_id;
			args.v5.ucEncoderMode = encoder_mode;
			args.v5.ucPpll = radeon_crtc->pll_id;
			break;
		default:
			DRM_ERROR("Unknown table version %d %d\n", frev, crev);
			return;
		}
		break;
	default:
		DRM_ERROR("Unknown table version %d %d\n", frev, crev);
		return;
	}

	atom_execute_table(rdev->mode_info.atom_context, index, (uint32_t *)&args);
}

static int evergreen_crtc_set_base(struct drm_crtc *crtc, int x, int y,
				   struct drm_framebuffer *old_fb)
{
	struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
	struct drm_device *dev = crtc->dev;
	struct radeon_device *rdev = dev->dev_private;
	struct radeon_framebuffer *radeon_fb;
	struct drm_gem_object *obj;
	struct radeon_bo *rbo;
	uint64_t fb_location;
	uint32_t fb_format, fb_pitch_pixels, tiling_flags;
	int r;

	/* no fb bound */
	if (!crtc->fb) {
		DRM_DEBUG("No FB bound\n");
		return 0;
	}

	radeon_fb = to_radeon_framebuffer(crtc->fb);

	/* Pin framebuffer & get tilling informations */
	obj = radeon_fb->obj;
	rbo = obj->driver_private;
	r = radeon_bo_reserve(rbo, false);
	if (unlikely(r != 0))
		return r;
	r = radeon_bo_pin(rbo, RADEON_GEM_DOMAIN_VRAM, &fb_location);
	if (unlikely(r != 0)) {
		radeon_bo_unreserve(rbo);
		return -EINVAL;
	}
	radeon_bo_get_tiling_flags(rbo, &tiling_flags, NULL);
	radeon_bo_unreserve(rbo);

	switch (crtc->fb->bits_per_pixel) {
	case 8:
		fb_format = (EVERGREEN_GRPH_DEPTH(EVERGREEN_GRPH_DEPTH_8BPP) |
			     EVERGREEN_GRPH_FORMAT(EVERGREEN_GRPH_FORMAT_INDEXED));
		break;
	case 15:
		fb_format = (EVERGREEN_GRPH_DEPTH(EVERGREEN_GRPH_DEPTH_16BPP) |
			     EVERGREEN_GRPH_FORMAT(EVERGREEN_GRPH_FORMAT_ARGB1555));
		break;
	case 16:
		fb_format = (EVERGREEN_GRPH_DEPTH(EVERGREEN_GRPH_DEPTH_16BPP) |
			     EVERGREEN_GRPH_FORMAT(EVERGREEN_GRPH_FORMAT_ARGB565));
		break;
	case 24:
	case 32:
		fb_format = (EVERGREEN_GRPH_DEPTH(EVERGREEN_GRPH_DEPTH_32BPP) |
			     EVERGREEN_GRPH_FORMAT(EVERGREEN_GRPH_FORMAT_ARGB8888));
		break;
	default:
		DRM_ERROR("Unsupported screen depth %d\n",
			  crtc->fb->bits_per_pixel);
		return -EINVAL;
	}

	switch (radeon_crtc->crtc_id) {
	case 0:
		WREG32(AVIVO_D1VGA_CONTROL, 0);
		break;
	case 1:
		WREG32(AVIVO_D2VGA_CONTROL, 0);
		break;
	case 2:
		WREG32(EVERGREEN_D3VGA_CONTROL, 0);
		break;
	case 3:
		WREG32(EVERGREEN_D4VGA_CONTROL, 0);
		break;
	case 4:
		WREG32(EVERGREEN_D5VGA_CONTROL, 0);
		break;
	case 5:
		WREG32(EVERGREEN_D6VGA_CONTROL, 0);
		break;
	default:
		break;
	}

	WREG32(EVERGREEN_GRPH_PRIMARY_SURFACE_ADDRESS_HIGH + radeon_crtc->crtc_offset,
	       upper_32_bits(fb_location));
	WREG32(EVERGREEN_GRPH_SECONDARY_SURFACE_ADDRESS_HIGH + radeon_crtc->crtc_offset,
	       upper_32_bits(fb_location));
	WREG32(EVERGREEN_GRPH_PRIMARY_SURFACE_ADDRESS + radeon_crtc->crtc_offset,
	       (u32)fb_location & EVERGREEN_GRPH_SURFACE_ADDRESS_MASK);
	WREG32(EVERGREEN_GRPH_SECONDARY_SURFACE_ADDRESS + radeon_crtc->crtc_offset,
	       (u32) fb_location & EVERGREEN_GRPH_SURFACE_ADDRESS_MASK);
	WREG32(EVERGREEN_GRPH_CONTROL + radeon_crtc->crtc_offset, fb_format);

	WREG32(EVERGREEN_GRPH_SURFACE_OFFSET_X + radeon_crtc->crtc_offset, 0);
	WREG32(EVERGREEN_GRPH_SURFACE_OFFSET_Y + radeon_crtc->crtc_offset, 0);
	WREG32(EVERGREEN_GRPH_X_START + radeon_crtc->crtc_offset, 0);
	WREG32(EVERGREEN_GRPH_Y_START + radeon_crtc->crtc_offset, 0);
	WREG32(EVERGREEN_GRPH_X_END + radeon_crtc->crtc_offset, crtc->fb->width);
	WREG32(EVERGREEN_GRPH_Y_END + radeon_crtc->crtc_offset, crtc->fb->height);

	fb_pitch_pixels = crtc->fb->pitch / (crtc->fb->bits_per_pixel / 8);
	WREG32(EVERGREEN_GRPH_PITCH + radeon_crtc->crtc_offset, fb_pitch_pixels);
	WREG32(EVERGREEN_GRPH_ENABLE + radeon_crtc->crtc_offset, 1);

	WREG32(EVERGREEN_DESKTOP_HEIGHT + radeon_crtc->crtc_offset,
	       crtc->mode.vdisplay);
	x &= ~3;
	y &= ~1;
	WREG32(EVERGREEN_VIEWPORT_START + radeon_crtc->crtc_offset,
	       (x << 16) | y);
	WREG32(EVERGREEN_VIEWPORT_SIZE + radeon_crtc->crtc_offset,
	       (crtc->mode.hdisplay << 16) | crtc->mode.vdisplay);

	if (crtc->mode.flags & DRM_MODE_FLAG_INTERLACE)
		WREG32(EVERGREEN_DATA_FORMAT + radeon_crtc->crtc_offset,
		       EVERGREEN_INTERLEAVE_EN);
	else
		WREG32(EVERGREEN_DATA_FORMAT + radeon_crtc->crtc_offset, 0);

	if (old_fb && old_fb != crtc->fb) {
		radeon_fb = to_radeon_framebuffer(old_fb);
		rbo = radeon_fb->obj->driver_private;
		r = radeon_bo_reserve(rbo, false);
		if (unlikely(r != 0))
			return r;
		radeon_bo_unpin(rbo);
		radeon_bo_unreserve(rbo);
	}

	/* Bytes per pixel may have changed */
	radeon_bandwidth_update(rdev);

	return 0;
}

static int avivo_crtc_set_base(struct drm_crtc *crtc, int x, int y,
			       struct drm_framebuffer *old_fb)
{
	struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
	struct drm_device *dev = crtc->dev;
	struct radeon_device *rdev = dev->dev_private;
	struct radeon_framebuffer *radeon_fb;
	struct drm_gem_object *obj;
	struct radeon_bo *rbo;
	uint64_t fb_location;
	uint32_t fb_format, fb_pitch_pixels, tiling_flags;
	int r;

	/* no fb bound */
	if (!crtc->fb) {
		DRM_DEBUG("No FB bound\n");
		return 0;
	}

	radeon_fb = to_radeon_framebuffer(crtc->fb);

	/* Pin framebuffer & get tilling informations */
	obj = radeon_fb->obj;
	rbo = obj->driver_private;
	r = radeon_bo_reserve(rbo, false);
	if (unlikely(r != 0))
		return r;
	r = radeon_bo_pin(rbo, RADEON_GEM_DOMAIN_VRAM, &fb_location);
	if (unlikely(r != 0)) {
		radeon_bo_unreserve(rbo);
		return -EINVAL;
	}
	radeon_bo_get_tiling_flags(rbo, &tiling_flags, NULL);
	radeon_bo_unreserve(rbo);

	switch (crtc->fb->bits_per_pixel) {
	case 8:
		fb_format =
		    AVIVO_D1GRPH_CONTROL_DEPTH_8BPP |
		    AVIVO_D1GRPH_CONTROL_8BPP_INDEXED;
		break;
	case 15:
		fb_format =
		    AVIVO_D1GRPH_CONTROL_DEPTH_16BPP |
		    AVIVO_D1GRPH_CONTROL_16BPP_ARGB1555;
		break;
	case 16:
		fb_format =
		    AVIVO_D1GRPH_CONTROL_DEPTH_16BPP |
		    AVIVO_D1GRPH_CONTROL_16BPP_RGB565;
		break;
	case 24:
	case 32:
		fb_format =
		    AVIVO_D1GRPH_CONTROL_DEPTH_32BPP |
		    AVIVO_D1GRPH_CONTROL_32BPP_ARGB8888;
		break;
	default:
		DRM_ERROR("Unsupported screen depth %d\n",
			  crtc->fb->bits_per_pixel);
		return -EINVAL;
	}

	if (tiling_flags & RADEON_TILING_MACRO)
		fb_format |= AVIVO_D1GRPH_MACRO_ADDRESS_MODE;

	if (tiling_flags & RADEON_TILING_MICRO)
		fb_format |= AVIVO_D1GRPH_TILED;

	if (radeon_crtc->crtc_id == 0)
		WREG32(AVIVO_D1VGA_CONTROL, 0);
	else
		WREG32(AVIVO_D2VGA_CONTROL, 0);

	if (rdev->family >= CHIP_RV770) {
		if (radeon_crtc->crtc_id) {
			WREG32(R700_D2GRPH_PRIMARY_SURFACE_ADDRESS_HIGH, 0);
			WREG32(R700_D2GRPH_SECONDARY_SURFACE_ADDRESS_HIGH, 0);
		} else {
			WREG32(R700_D1GRPH_PRIMARY_SURFACE_ADDRESS_HIGH, 0);
			WREG32(R700_D1GRPH_SECONDARY_SURFACE_ADDRESS_HIGH, 0);
		}
	}
	WREG32(AVIVO_D1GRPH_PRIMARY_SURFACE_ADDRESS + radeon_crtc->crtc_offset,
	       (u32) fb_location);
	WREG32(AVIVO_D1GRPH_SECONDARY_SURFACE_ADDRESS +
	       radeon_crtc->crtc_offset, (u32) fb_location);
	WREG32(AVIVO_D1GRPH_CONTROL + radeon_crtc->crtc_offset, fb_format);

	WREG32(AVIVO_D1GRPH_SURFACE_OFFSET_X + radeon_crtc->crtc_offset, 0);
	WREG32(AVIVO_D1GRPH_SURFACE_OFFSET_Y + radeon_crtc->crtc_offset, 0);
	WREG32(AVIVO_D1GRPH_X_START + radeon_crtc->crtc_offset, 0);
	WREG32(AVIVO_D1GRPH_Y_START + radeon_crtc->crtc_offset, 0);
	WREG32(AVIVO_D1GRPH_X_END + radeon_crtc->crtc_offset, crtc->fb->width);
	WREG32(AVIVO_D1GRPH_Y_END + radeon_crtc->crtc_offset, crtc->fb->height);

	fb_pitch_pixels = crtc->fb->pitch / (crtc->fb->bits_per_pixel / 8);
	WREG32(AVIVO_D1GRPH_PITCH + radeon_crtc->crtc_offset, fb_pitch_pixels);
	WREG32(AVIVO_D1GRPH_ENABLE + radeon_crtc->crtc_offset, 1);

	WREG32(AVIVO_D1MODE_DESKTOP_HEIGHT + radeon_crtc->crtc_offset,
	       crtc->mode.vdisplay);
	x &= ~3;
	y &= ~1;
	WREG32(AVIVO_D1MODE_VIEWPORT_START + radeon_crtc->crtc_offset,
	       (x << 16) | y);
	WREG32(AVIVO_D1MODE_VIEWPORT_SIZE + radeon_crtc->crtc_offset,
	       (crtc->mode.hdisplay << 16) | crtc->mode.vdisplay);

	if (crtc->mode.flags & DRM_MODE_FLAG_INTERLACE)
		WREG32(AVIVO_D1MODE_DATA_FORMAT + radeon_crtc->crtc_offset,
		       AVIVO_D1MODE_INTERLEAVE_EN);
	else
		WREG32(AVIVO_D1MODE_DATA_FORMAT + radeon_crtc->crtc_offset, 0);

	if (old_fb && old_fb != crtc->fb) {
		radeon_fb = to_radeon_framebuffer(old_fb);
		rbo = radeon_fb->obj->driver_private;
		r = radeon_bo_reserve(rbo, false);
		if (unlikely(r != 0))
			return r;
		radeon_bo_unpin(rbo);
		radeon_bo_unreserve(rbo);
	}

	/* Bytes per pixel may have changed */
	radeon_bandwidth_update(rdev);

	return 0;
}

int atombios_crtc_set_base(struct drm_crtc *crtc, int x, int y,
			   struct drm_framebuffer *old_fb)
{
	struct drm_device *dev = crtc->dev;
	struct radeon_device *rdev = dev->dev_private;

	if (ASIC_IS_DCE4(rdev))
		return evergreen_crtc_set_base(crtc, x, y, old_fb);
	else if (ASIC_IS_AVIVO(rdev))
		return avivo_crtc_set_base(crtc, x, y, old_fb);
	else
		return radeon_crtc_set_base(crtc, x, y, old_fb);
}

/* properly set additional regs when using atombios */
static void radeon_legacy_atom_fixup(struct drm_crtc *crtc)
{
	struct drm_device *dev = crtc->dev;
	struct radeon_device *rdev = dev->dev_private;
	struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
	u32 disp_merge_cntl;

	switch (radeon_crtc->crtc_id) {
	case 0:
		disp_merge_cntl = RREG32(RADEON_DISP_MERGE_CNTL);
		disp_merge_cntl &= ~RADEON_DISP_RGB_OFFSET_EN;
		WREG32(RADEON_DISP_MERGE_CNTL, disp_merge_cntl);
		break;
	case 1:
		disp_merge_cntl = RREG32(RADEON_DISP2_MERGE_CNTL);
		disp_merge_cntl &= ~RADEON_DISP2_RGB_OFFSET_EN;
		WREG32(RADEON_DISP2_MERGE_CNTL, disp_merge_cntl);
		WREG32(RADEON_FP_H2_SYNC_STRT_WID,   RREG32(RADEON_CRTC2_H_SYNC_STRT_WID));
		WREG32(RADEON_FP_V2_SYNC_STRT_WID,   RREG32(RADEON_CRTC2_V_SYNC_STRT_WID));
		break;
	}
}

static int radeon_atom_pick_pll(struct drm_crtc *crtc)
{
	struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
	struct drm_device *dev = crtc->dev;
	struct radeon_device *rdev = dev->dev_private;
	struct drm_encoder *test_encoder;
	struct drm_crtc *test_crtc;
	uint32_t pll_in_use = 0;

	if (ASIC_IS_DCE4(rdev)) {
		/* if crtc is driving DP and we have an ext clock, use that */
		list_for_each_entry(test_encoder, &dev->mode_config.encoder_list, head) {
			if (test_encoder->crtc && (test_encoder->crtc == crtc)) {
				if (atombios_get_encoder_mode(test_encoder) == ATOM_ENCODER_MODE_DP) {
					if (rdev->clock.dp_extclk)
						return ATOM_PPLL_INVALID;
				}
			}
		}

		/* otherwise, pick one of the plls */
		list_for_each_entry(test_crtc, &dev->mode_config.crtc_list, head) {
			struct radeon_crtc *radeon_test_crtc;

			if (crtc == test_crtc)
				continue;

			radeon_test_crtc = to_radeon_crtc(test_crtc);
			if ((radeon_test_crtc->pll_id >= ATOM_PPLL1) &&
			    (radeon_test_crtc->pll_id <= ATOM_PPLL2))
				pll_in_use |= (1 << radeon_test_crtc->pll_id);
		}
		if (!(pll_in_use & 1))
			return ATOM_PPLL1;
		return ATOM_PPLL2;
	} else
		return radeon_crtc->crtc_id;

}

int atombios_crtc_mode_set(struct drm_crtc *crtc,
			   struct drm_display_mode *mode,
			   struct drm_display_mode *adjusted_mode,
			   int x, int y, struct drm_framebuffer *old_fb)
{
	struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
	struct drm_device *dev = crtc->dev;
	struct radeon_device *rdev = dev->dev_private;

	/* TODO color tiling */

	/* pick pll */
	radeon_crtc->pll_id = radeon_atom_pick_pll(crtc);

	atombios_set_ss(crtc, 0);
	/* always set DCPLL */
	if (ASIC_IS_DCE4(rdev))
		atombios_crtc_set_dcpll(crtc);
	atombios_crtc_set_pll(crtc, adjusted_mode);
	atombios_set_ss(crtc, 1);

	if (ASIC_IS_DCE4(rdev))
		atombios_set_crtc_dtd_timing(crtc, adjusted_mode);
	else if (ASIC_IS_AVIVO(rdev))
		atombios_crtc_set_timing(crtc, adjusted_mode);
	else {
		atombios_crtc_set_timing(crtc, adjusted_mode);
		if (radeon_crtc->crtc_id == 0)
			atombios_set_crtc_dtd_timing(crtc, adjusted_mode);
		radeon_legacy_atom_fixup(crtc);
	}
	atombios_crtc_set_base(crtc, x, y, old_fb);
	atombios_overscan_setup(crtc, mode, adjusted_mode);
	atombios_scaler_setup(crtc);
	return 0;
}

static bool atombios_crtc_mode_fixup(struct drm_crtc *crtc,
				     struct drm_display_mode *mode,
				     struct drm_display_mode *adjusted_mode)
{
	if (!radeon_crtc_scaling_mode_fixup(crtc, mode, adjusted_mode))
		return false;
	return true;
}

static void atombios_crtc_prepare(struct drm_crtc *crtc)
{
	atombios_lock_crtc(crtc, 1);
	atombios_crtc_dpms(crtc, DRM_MODE_DPMS_OFF);
}

static void atombios_crtc_commit(struct drm_crtc *crtc)
{
	atombios_crtc_dpms(crtc, DRM_MODE_DPMS_ON);
	atombios_lock_crtc(crtc, 0);
}

static const struct drm_crtc_helper_funcs atombios_helper_funcs = {
	.dpms = atombios_crtc_dpms,
	.mode_fixup = atombios_crtc_mode_fixup,
	.mode_set = atombios_crtc_mode_set,
	.mode_set_base = atombios_crtc_set_base,
	.prepare = atombios_crtc_prepare,
	.commit = atombios_crtc_commit,
	.load_lut = radeon_crtc_load_lut,
};

void radeon_atombios_init_crtc(struct drm_device *dev,
			       struct radeon_crtc *radeon_crtc)
{
	struct radeon_device *rdev = dev->dev_private;

	if (ASIC_IS_DCE4(rdev)) {
		switch (radeon_crtc->crtc_id) {
		case 0:
		default:
			radeon_crtc->crtc_id = EVERGREEN_CRTC0_REGISTER_OFFSET;
			break;
		case 1:
			radeon_crtc->crtc_id = EVERGREEN_CRTC1_REGISTER_OFFSET;
			break;
		case 2:
			radeon_crtc->crtc_id = EVERGREEN_CRTC2_REGISTER_OFFSET;
			break;
		case 3:
			radeon_crtc->crtc_id = EVERGREEN_CRTC3_REGISTER_OFFSET;
			break;
		case 4:
			radeon_crtc->crtc_id = EVERGREEN_CRTC4_REGISTER_OFFSET;
			break;
		case 5:
			radeon_crtc->crtc_id = EVERGREEN_CRTC5_REGISTER_OFFSET;
			break;
		}
	} else {
		if (radeon_crtc->crtc_id == 1)
			radeon_crtc->crtc_offset =
				AVIVO_D2CRTC_H_TOTAL - AVIVO_D1CRTC_H_TOTAL;
		else
			radeon_crtc->crtc_offset = 0;
	}
	radeon_crtc->pll_id = -1;
	drm_crtc_helper_add(&radeon_crtc->base, &atombios_helper_funcs);
}