text: #include <drm/drmP.h>
  #include <drm/drm_mode.h>
  #include "nouveau_drm.h"
  #include "nouveau_reg.h"
  #include "nouveau_crtc.h"
  #include "hw.h"
  
  static void
  nv04_cursor_show(struct nouveau_crtc *nv_crtc, bool update)
  {
  	nv_show_cursor(nv_crtc->base.dev, nv_crtc->index, true);
  }
  
  static void
  nv04_cursor_hide(struct nouveau_crtc *nv_crtc, bool update)
  {
  	nv_show_cursor(nv_crtc->base.dev, nv_crtc->index, false);
  }
  
  static void
  nv04_cursor_set_pos(struct nouveau_crtc *nv_crtc, int x, int y)
  {
  	nv_crtc->cursor_saved_x = x; nv_crtc->cursor_saved_y = y;
  	NVWriteRAMDAC(nv_crtc->base.dev, nv_crtc->index,
  		      NV_PRAMDAC_CU_START_POS,
  		      XLATE(y, 0, NV_PRAMDAC_CU_START_POS_Y) |
  		      XLATE(x, 0, NV_PRAMDAC_CU_START_POS_X));
  }
  
  static void
  crtc_wr_cio_state(struct drm_crtc *crtc, struct nv04_crtc_reg *crtcstate, int index)
  {
  	NVWriteVgaCrtc(crtc->dev, nouveau_crtc(crtc)->index, index,
  		       crtcstate->CRTC[index]);
  }
  
  static void
  nv04_cursor_set_offset(struct nouveau_crtc *nv_crtc, uint32_t offset)
  {
  	struct drm_device *dev = nv_crtc->base.dev;
  	struct nouveau_drm *drm = nouveau_drm(dev);
  	struct nv04_crtc_reg *regp = &nv04_display(dev)->mode_reg.crtc_reg[nv_crtc->index];
  	struct drm_crtc *crtc = &nv_crtc->base;
  
  	regp->CRTC[NV_CIO_CRE_HCUR_ADDR0_INDEX] =
  		MASK(NV_CIO_CRE_HCUR_ASI) |
  		XLATE(offset, 17, NV_CIO_CRE_HCUR_ADDR0_ADR);
  	regp->CRTC[NV_CIO_CRE_HCUR_ADDR1_INDEX] =
  		XLATE(offset, 11, NV_CIO_CRE_HCUR_ADDR1_ADR);
  	if (crtc->mode.flags & DRM_MODE_FLAG_DBLSCAN)
  		regp->CRTC[NV_CIO_CRE_HCUR_ADDR1_INDEX] |=
  			MASK(NV_CIO_CRE_HCUR_ADDR1_CUR_DBL);
  	regp->CRTC[NV_CIO_CRE_HCUR_ADDR2_INDEX] = offset >> 24;
  
  	crtc_wr_cio_state(crtc, regp, NV_CIO_CRE_HCUR_ADDR0_INDEX);
  	crtc_wr_cio_state(crtc, regp, NV_CIO_CRE_HCUR_ADDR1_INDEX);
  	crtc_wr_cio_state(crtc, regp, NV_CIO_CRE_HCUR_ADDR2_INDEX);
  	if (nv_device(drm->device)->card_type == NV_40)
  		nv_fix_nv40_hw_cursor(dev, nv_crtc->index);
  }
  
  int
  nv04_cursor_init(struct nouveau_crtc *crtc)
  {
  	crtc->cursor.set_offset = nv04_cursor_set_offset;
  	crtc->cursor.set_pos = nv04_cursor_set_pos;
  	crtc->cursor.hide = nv04_cursor_hide;
  	crtc->cursor.show = nv04_cursor_show;
  	return 0;
  }
  