Commit 2f67c6e0 authored by Alex Deucher's avatar Alex Deucher Committed by Dave Airlie
Browse files

drm/radeon/kms/r600: add support for vline relocs 



Provides support for anti-tearing functionality
in the ddx.

Signed-off-by: default avatarAlex Deucher <alexdeucher@gmail.com>
Signed-off-by: default avatarDave Airlie <airlied@linux.ie>
parent 90ebd065

drivers/gpu/drm/radeon/r500_reg.h

+3 −0
Original line number Diff line number Diff line
@@ -445,6 +445,8 @@ 
#define AVIVO_D1MODE_VBLANK_STATUS              0x6534

#       define AVIVO_VBLANK_ACK                 (1 << 4)

#define AVIVO_D1MODE_VLINE_START_END            0x6538

#define AVIVO_D1MODE_VLINE_STATUS               0x653c

#       define AVIVO_D1MODE_VLINE_STAT          (1 << 12)

#define AVIVO_DxMODE_INT_MASK                   0x6540

#       define AVIVO_D1MODE_INT_MASK            (1 << 0)

#       define AVIVO_D2MODE_INT_MASK            (1 << 8)
@@ -502,6 +504,7 @@ 


#define AVIVO_D2MODE_VBLANK_STATUS              0x6d34

#define AVIVO_D2MODE_VLINE_START_END            0x6d38

#define AVIVO_D2MODE_VLINE_STATUS               0x6d3c

#define AVIVO_D2MODE_VIEWPORT_START             0x6d80

#define AVIVO_D2MODE_VIEWPORT_SIZE              0x6d84

#define AVIVO_D2MODE_EXT_OVERSCAN_LEFT_RIGHT    0x6d88

drivers/gpu/drm/radeon/r600_cs.c

+124 −1
Original line number Diff line number Diff line
@@ -177,13 +177,136 @@ static int r600_cs_packet_next_reloc_nomm(struct radeon_cs_parser *p, 
	return 0;

}



/**

 * r600_cs_packet_next_vline() - parse userspace VLINE packet

 * @parser:		parser structure holding parsing context.

 *

 * Userspace sends a special sequence for VLINE waits.

 * PACKET0 - VLINE_START_END + value

 * PACKET3 - WAIT_REG_MEM poll vline status reg

 * RELOC (P3) - crtc_id in reloc.

 *

 * This function parses this and relocates the VLINE START END

 * and WAIT_REG_MEM packets to the correct crtc.

 * It also detects a switched off crtc and nulls out the

 * wait in that case.

 */

static int r600_cs_packet_parse_vline(struct radeon_cs_parser *p)

{

	struct drm_mode_object *obj;

	struct drm_crtc *crtc;

	struct radeon_crtc *radeon_crtc;

	struct radeon_cs_packet p3reloc, wait_reg_mem;

	int crtc_id;

	int r;

	uint32_t header, h_idx, reg, wait_reg_mem_info;

	volatile uint32_t *ib;



	ib = p->ib->ptr;



	/* parse the WAIT_REG_MEM */

	r = r600_cs_packet_parse(p, &wait_reg_mem, p->idx);

	if (r)

		return r;



	/* check its a WAIT_REG_MEM */

	if (wait_reg_mem.type != PACKET_TYPE3 ||

	    wait_reg_mem.opcode != PACKET3_WAIT_REG_MEM) {

		DRM_ERROR("vline wait missing WAIT_REG_MEM segment\n");

		r = -EINVAL;

		return r;

	}



	wait_reg_mem_info = radeon_get_ib_value(p, wait_reg_mem.idx + 1);

	/* bit 4 is reg (0) or mem (1) */

	if (wait_reg_mem_info & 0x10) {

		DRM_ERROR("vline WAIT_REG_MEM waiting on MEM rather than REG\n");

		r = -EINVAL;

		return r;

	}

	/* waiting for value to be equal */

	if ((wait_reg_mem_info & 0x7) != 0x3) {

		DRM_ERROR("vline WAIT_REG_MEM function not equal\n");

		r = -EINVAL;

		return r;

	}

	if ((radeon_get_ib_value(p, wait_reg_mem.idx + 2) << 2) != AVIVO_D1MODE_VLINE_STATUS) {

		DRM_ERROR("vline WAIT_REG_MEM bad reg\n");

		r = -EINVAL;

		return r;

	}



	if (radeon_get_ib_value(p, wait_reg_mem.idx + 5) != AVIVO_D1MODE_VLINE_STAT) {

		DRM_ERROR("vline WAIT_REG_MEM bad bit mask\n");

		r = -EINVAL;

		return r;

	}



	/* jump over the NOP */

	r = r600_cs_packet_parse(p, &p3reloc, p->idx + wait_reg_mem.count + 2);

	if (r)

		return r;



	h_idx = p->idx - 2;

	p->idx += wait_reg_mem.count + 2;

	p->idx += p3reloc.count + 2;



	header = radeon_get_ib_value(p, h_idx);

	crtc_id = radeon_get_ib_value(p, h_idx + 2 + 7 + 1);

	reg = header >> 2;

	mutex_lock(&p->rdev->ddev->mode_config.mutex);

	obj = drm_mode_object_find(p->rdev->ddev, crtc_id, DRM_MODE_OBJECT_CRTC);

	if (!obj) {

		DRM_ERROR("cannot find crtc %d\n", crtc_id);

		r = -EINVAL;

		goto out;

	}

	crtc = obj_to_crtc(obj);

	radeon_crtc = to_radeon_crtc(crtc);

	crtc_id = radeon_crtc->crtc_id;



	if (!crtc->enabled) {

		/* if the CRTC isn't enabled - we need to nop out the WAIT_REG_MEM */

		ib[h_idx + 2] = PACKET2(0);

		ib[h_idx + 3] = PACKET2(0);

		ib[h_idx + 4] = PACKET2(0);

		ib[h_idx + 5] = PACKET2(0);

		ib[h_idx + 6] = PACKET2(0);

		ib[h_idx + 7] = PACKET2(0);

		ib[h_idx + 8] = PACKET2(0);

	} else if (crtc_id == 1) {

		switch (reg) {

		case AVIVO_D1MODE_VLINE_START_END:

			header &= ~R600_CP_PACKET0_REG_MASK;

			header |= AVIVO_D2MODE_VLINE_START_END >> 2;

			break;

		default:

			DRM_ERROR("unknown crtc reloc\n");

			r = -EINVAL;

			goto out;

		}

		ib[h_idx] = header;

		ib[h_idx + 4] = AVIVO_D2MODE_VLINE_STATUS >> 2;

	}

out:

	mutex_unlock(&p->rdev->ddev->mode_config.mutex);

	return r;

}



static int r600_packet0_check(struct radeon_cs_parser *p,

				struct radeon_cs_packet *pkt,

				unsigned idx, unsigned reg)

{

	int r;



	switch (reg) {

	case AVIVO_D1MODE_VLINE_START_END:

	case AVIVO_D2MODE_VLINE_START_END:

		r = r600_cs_packet_parse_vline(p);

		if (r) {

			DRM_ERROR("No reloc for ib[%d]=0x%04X\n",

					idx, reg);

			return r;

		}

		break;

	default:

		printk(KERN_ERR "Forbidden register 0x%04X in cs at %d\n",

drivers/gpu/drm/radeon/radeon_reg.h

+1 −0
Original line number Diff line number Diff line
@@ -3333,6 +3333,7 @@ 
#       define RADEON_CP_PACKET_MAX_DWORDS          (1 << 12)

#       define RADEON_CP_PACKET0_REG_MASK           0x000007ff

#       define R300_CP_PACKET0_REG_MASK             0x00001fff

#       define R600_CP_PACKET0_REG_MASK             0x0000ffff

#       define RADEON_CP_PACKET1_REG0_MASK          0x000007ff

#       define RADEON_CP_PACKET1_REG1_MASK          0x003ff800