drm/gma500: Remove 2D accel code

2D acceleration is only available on PSB and MRST and very slow on both
platforms. CPU acceleration is faster so don't bother with 2D accel
anymore.
Signed-off-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com>
Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20201115175420.32167-1-patrik.r.jakobsson@gmail.com

drivers/gpu/drm/gma500/accel_2d.c

@@ -58,295 +58,3 @@ void psb_spank(struct drm_psb_private *dev_priv)
 	(void) PSB_RSGX32(PSB_CR_BIF_CTRL);
 	PSB_WSGX32(dev_priv->gtt.gatt_start, PSB_CR_BIF_TWOD_REQ_BASE);
 }
-
-/**
- *	psb2_2d_wait_available	-	wait for FIFO room
- *	@dev_priv: our DRM device
- *	@size: size (in dwords) of the command we want to issue
- *
- *	Wait until there is room to load the FIFO with our data. If the
- *	device is not responding then reset it
- */
-static int psb_2d_wait_available(struct drm_psb_private *dev_priv,
-			  unsigned size)
-{
-	uint32_t avail = PSB_RSGX32(PSB_CR_2D_SOCIF);
-	unsigned long t = jiffies + HZ;
-
-	while (avail < size) {
-		avail = PSB_RSGX32(PSB_CR_2D_SOCIF);
-		if (time_after(jiffies, t)) {
-			psb_spank(dev_priv);
-			return -EIO;
-		}
-	}
-	return 0;
-}
-
-/**
- *	psb_2d_submit		-	submit a 2D command
- *	@dev_priv: our DRM device
- *	@cmdbuf: command to issue
- *	@size: length (in dwords)
- *
- *	Issue one or more 2D commands to the accelerator. This needs to be
- *	serialized later when we add the GEM interfaces for acceleration
- */
-static int psbfb_2d_submit(struct drm_psb_private *dev_priv, uint32_t *cmdbuf,
-								unsigned size)
-{
-	int ret = 0;
-	int i;
-	unsigned submit_size;
-	unsigned long flags;
-
-	spin_lock_irqsave(&dev_priv->lock_2d, flags);
-	while (size > 0) {
-		submit_size = (size < 0x60) ? size : 0x60;
-		size -= submit_size;
-		ret = psb_2d_wait_available(dev_priv, submit_size);
-		if (ret)
-			break;
-
-		submit_size <<= 2;
-
-		for (i = 0; i < submit_size; i += 4)
-			PSB_WSGX32(*cmdbuf++, PSB_SGX_2D_SLAVE_PORT + i);
-
-		(void)PSB_RSGX32(PSB_SGX_2D_SLAVE_PORT + i - 4);
-	}
-	spin_unlock_irqrestore(&dev_priv->lock_2d, flags);
-	return ret;
-}
-
-
-/**
- *	psb_accel_2d_copy_direction	-	compute blit order
- *	@xdir: X direction of move
- *	@ydir: Y direction of move
- *
- *	Compute the correct order setings to ensure that an overlapping blit
- *	correctly copies all the pixels.
- */
-static u32 psb_accel_2d_copy_direction(int xdir, int ydir)
-{
-	if (xdir < 0)
-		return (ydir < 0) ? PSB_2D_COPYORDER_BR2TL :
-						PSB_2D_COPYORDER_TR2BL;
-	else
-		return (ydir < 0) ? PSB_2D_COPYORDER_BL2TR :
-						PSB_2D_COPYORDER_TL2BR;
-}
-
-/**
- *	psb_accel_2d_copy		-	accelerated 2D copy
- *	@dev_priv: our DRM device
- *	@src_offset in bytes
- *	@src_stride in bytes
- *	@src_format psb 2D format defines
- *	@dst_offset in bytes
- *	@dst_stride in bytes
- *	@dst_format psb 2D format defines
- *	@src_x offset in pixels
- *	@src_y offset in pixels
- *	@dst_x offset in pixels
- *	@dst_y offset in pixels
- *	@size_x of the copied area
- *	@size_y of the copied area
- *
- *	Format and issue a 2D accelerated copy command.
- */
-static int psb_accel_2d_copy(struct drm_psb_private *dev_priv,
-			     uint32_t src_offset, uint32_t src_stride,
-			     uint32_t src_format, uint32_t dst_offset,
-			     uint32_t dst_stride, uint32_t dst_format,
-			     uint16_t src_x, uint16_t src_y,
-			     uint16_t dst_x, uint16_t dst_y,
-			     uint16_t size_x, uint16_t size_y)
-{
-	uint32_t blit_cmd;
-	uint32_t buffer[10];
-	uint32_t *buf;
-	uint32_t direction;
-
-	buf = buffer;
-
-	direction =
-	    psb_accel_2d_copy_direction(src_x - dst_x, src_y - dst_y);
-
-	if (direction == PSB_2D_COPYORDER_BR2TL ||
-	    direction == PSB_2D_COPYORDER_TR2BL) {
-		src_x += size_x - 1;
-		dst_x += size_x - 1;
-	}
-	if (direction == PSB_2D_COPYORDER_BR2TL ||
-	    direction == PSB_2D_COPYORDER_BL2TR) {
-		src_y += size_y - 1;
-		dst_y += size_y - 1;
-	}
-
-	blit_cmd =
-	    PSB_2D_BLIT_BH |
-	    PSB_2D_ROT_NONE |
-	    PSB_2D_DSTCK_DISABLE |
-	    PSB_2D_SRCCK_DISABLE |
-	    PSB_2D_USE_PAT | PSB_2D_ROP3_SRCCOPY | direction;
-
-	*buf++ = PSB_2D_FENCE_BH;
-	*buf++ =
-	    PSB_2D_DST_SURF_BH | dst_format | (dst_stride <<
-					       PSB_2D_DST_STRIDE_SHIFT);
-	*buf++ = dst_offset;
-	*buf++ =
-	    PSB_2D_SRC_SURF_BH | src_format | (src_stride <<
-					       PSB_2D_SRC_STRIDE_SHIFT);
-	*buf++ = src_offset;
-	*buf++ =
-	    PSB_2D_SRC_OFF_BH | (src_x << PSB_2D_SRCOFF_XSTART_SHIFT) |
-	    (src_y << PSB_2D_SRCOFF_YSTART_SHIFT);
-	*buf++ = blit_cmd;
-	*buf++ =
-	    (dst_x << PSB_2D_DST_XSTART_SHIFT) | (dst_y <<
-						  PSB_2D_DST_YSTART_SHIFT);
-	*buf++ =
-	    (size_x << PSB_2D_DST_XSIZE_SHIFT) | (size_y <<
-						  PSB_2D_DST_YSIZE_SHIFT);
-	*buf++ = PSB_2D_FLUSH_BH;
-
-	return psbfb_2d_submit(dev_priv, buffer, buf - buffer);
-}
-
-/**
- *	psbfb_copyarea_accel	-	copyarea acceleration for /dev/fb
- *	@info: our framebuffer
- *	@a: copyarea parameters from the framebuffer core
- *
- *	Perform a 2D copy via the accelerator
- */
-static void psbfb_copyarea_accel(struct fb_info *info,
-				 const struct fb_copyarea *a)
-{
-	struct drm_fb_helper *fb_helper = info->par;
-	struct drm_framebuffer *fb = fb_helper->fb;
-	struct drm_device *dev;
-	struct drm_psb_private *dev_priv;
-	uint32_t offset;
-	uint32_t stride;
-	uint32_t src_format;
-	uint32_t dst_format;
-
-	if (!fb)
-		return;
-
-	dev = fb->dev;
-	dev_priv = dev->dev_private;
-	offset = to_gtt_range(fb->obj[0])->offset;
-	stride = fb->pitches[0];
-
-	switch (fb->format->depth) {
-	case 8:
-		src_format = PSB_2D_SRC_332RGB;
-		dst_format = PSB_2D_DST_332RGB;
-		break;
-	case 15:
-		src_format = PSB_2D_SRC_555RGB;
-		dst_format = PSB_2D_DST_555RGB;
-		break;
-	case 16:
-		src_format = PSB_2D_SRC_565RGB;
-		dst_format = PSB_2D_DST_565RGB;
-		break;
-	case 24:
-	case 32:
-		/* this is wrong but since we don't do blending its okay */
-		src_format = PSB_2D_SRC_8888ARGB;
-		dst_format = PSB_2D_DST_8888ARGB;
-		break;
-	default:
-		/* software fallback */
-		drm_fb_helper_cfb_copyarea(info, a);
-		return;
-	}
-
-	if (!gma_power_begin(dev, false)) {
-		drm_fb_helper_cfb_copyarea(info, a);
-		return;
-	}
-	psb_accel_2d_copy(dev_priv,
-			  offset, stride, src_format,
-			  offset, stride, dst_format,
-			  a->sx, a->sy, a->dx, a->dy, a->width, a->height);
-	gma_power_end(dev);
-}
-
-/**
- *	psbfb_copyarea	-	2D copy interface
- *	@info: our framebuffer
- *	@region: region to copy
- *
- *	Copy an area of the framebuffer console either by the accelerator
- *	or directly using the cfb helpers according to the request
- */
-void psbfb_copyarea(struct fb_info *info,
-			   const struct fb_copyarea *region)
-{
-	if (unlikely(info->state != FBINFO_STATE_RUNNING))
-		return;
-
-	/* Avoid the 8 pixel erratum */
-	if (region->width == 8 || region->height == 8 ||
-		(info->flags & FBINFO_HWACCEL_DISABLED))
-		return drm_fb_helper_cfb_copyarea(info, region);
-
-	psbfb_copyarea_accel(info, region);
-}
-
-/**
- *	psbfb_sync	-	synchronize 2D
- *	@info: our framebuffer
- *
- *	Wait for the 2D engine to quiesce so that we can do CPU
- *	access to the framebuffer again
- */
-int psbfb_sync(struct fb_info *info)
-{
-	struct drm_fb_helper *fb_helper = info->par;
-	struct drm_framebuffer *fb = fb_helper->fb;
-	struct drm_device *dev = fb->dev;
-	struct drm_psb_private *dev_priv = dev->dev_private;
-	unsigned long _end = jiffies + HZ;
-	int busy = 0;
-	unsigned long flags;
-
-	spin_lock_irqsave(&dev_priv->lock_2d, flags);
-	/*
-	 * First idle the 2D engine.
-	 */
-
-	if ((PSB_RSGX32(PSB_CR_2D_SOCIF) == _PSB_C2_SOCIF_EMPTY) &&
-	    ((PSB_RSGX32(PSB_CR_2D_BLIT_STATUS) & _PSB_C2B_STATUS_BUSY) == 0))
-		goto out;
-
-	do {
-		busy = (PSB_RSGX32(PSB_CR_2D_SOCIF) != _PSB_C2_SOCIF_EMPTY);
-		cpu_relax();
-	} while (busy && !time_after_eq(jiffies, _end));
-
-	if (busy)
-		busy = (PSB_RSGX32(PSB_CR_2D_SOCIF) != _PSB_C2_SOCIF_EMPTY);
-	if (busy)
-		goto out;
-
-	do {
-		busy = ((PSB_RSGX32(PSB_CR_2D_BLIT_STATUS) &
-						_PSB_C2B_STATUS_BUSY) != 0);
-		cpu_relax();
-	} while (busy && !time_after_eq(jiffies, _end));
-	if (busy)
-		busy = ((PSB_RSGX32(PSB_CR_2D_BLIT_STATUS) &
-					_PSB_C2B_STATUS_BUSY) != 0);
-
-out:
-	spin_unlock_irqrestore(&dev_priv->lock_2d, flags);
-	return (busy) ? -EBUSY : 0;
-}

drivers/gpu/drm/gma500/cdv_device.c

@@ -584,7 +584,6 @@ static int cdv_chip_setup(struct drm_device *dev)
 
 const struct psb_ops cdv_chip_ops = {
 	.name = "GMA3600/3650",
-	.accel_2d = 0,
 	.pipes = 2,
 	.crtcs = 2,
 	.hdmi_mask = (1 << 0) | (1 << 1),

drivers/gpu/drm/gma500/framebuffer.c

@@ -144,17 +144,6 @@ static int psbfb_mmap(struct fb_info *info, struct vm_area_struct *vma)
 	return 0;
 }
 
-static const struct fb_ops psbfb_ops = {
-	.owner = THIS_MODULE,
-	DRM_FB_HELPER_DEFAULT_OPS,
-	.fb_setcolreg = psbfb_setcolreg,
-	.fb_fillrect = drm_fb_helper_cfb_fillrect,
-	.fb_copyarea = psbfb_copyarea,
-	.fb_imageblit = drm_fb_helper_cfb_imageblit,
-	.fb_mmap = psbfb_mmap,
-	.fb_sync = psbfb_sync,
-};
-
 static const struct fb_ops psbfb_unaccel_ops = {
 	.owner = THIS_MODULE,
 	DRM_FB_HELPER_DEFAULT_OPS,
@@ -318,10 +307,7 @@ static int psbfb_create(struct drm_fb_helper *fb_helper,
 
 	fb_helper->fb = fb;
 
-	if (dev_priv->ops->accel_2d)	/* 2D engine */
-		info->fbops = &psbfb_ops;
-	else	/* Software */
-		info->fbops = &psbfb_unaccel_ops;
+	info->fbops = &psbfb_unaccel_ops;
 
 	info->fix.smem_start = dev->mode_config.fb_base;
 	info->fix.smem_len = size;

drivers/gpu/drm/gma500/mdfld_device.c

@@ -536,7 +536,6 @@ static int mdfld_chip_setup(struct drm_device *dev)
 
 const struct psb_ops mdfld_chip_ops = {
 	.name = "mdfld",
-	.accel_2d = 0,
 	.pipes = 3,
 	.crtcs = 3,
 	.lvds_mask = (1 << 1),

drivers/gpu/drm/gma500/oaktrail_device.c

@@ -536,7 +536,6 @@ static void oaktrail_teardown(struct drm_device *dev)
 
 const struct psb_ops oaktrail_chip_ops = {
 	.name = "Oaktrail",
-	.accel_2d = 1,
 	.pipes = 2,
 	.crtcs = 2,
 	.hdmi_mask = (1 << 1),

drivers/gpu/drm/gma500/psb_device.c

@@ -318,7 +318,6 @@ static void psb_chip_teardown(struct drm_device *dev)
 
 const struct psb_ops psb_chip_ops = {
 	.name = "Poulsbo",
-	.accel_2d = 1,
 	.pipes = 2,
 	.crtcs = 2,
 	.hdmi_mask = (1 << 0),

drivers/gpu/drm/gma500/psb_drv.c

@@ -124,7 +124,6 @@ static int psb_do_init(struct drm_device *dev)
 	    (stolen_gtt << PAGE_SHIFT) * 1024;
 
 	spin_lock_init(&dev_priv->irqmask_lock);
-	spin_lock_init(&dev_priv->lock_2d);
 
 	PSB_WSGX32(0x00000000, PSB_CR_BIF_BANK0);
 	PSB_WSGX32(0x00000000, PSB_CR_BIF_BANK1);

drivers/gpu/drm/gma500/psb_drv.h

@@ -576,9 +576,6 @@ struct drm_psb_private {
 
 	struct drm_fb_helper *fb_helper;
 
-	/* 2D acceleration */
-	spinlock_t lock_2d;
-
 	/* Panel brightness */
 	int brightness;
 	int brightness_adjusted;
@@ -615,7 +612,6 @@ struct drm_psb_private {
 /* Operations for each board type */
 struct psb_ops {
 	const char *name;
-	unsigned int accel_2d:1;
 	int pipes;		/* Number of output pipes */
 	int crtcs;		/* Number of CRTCs */
 	int sgx_offset;		/* Base offset of SGX device */
@@ -696,9 +692,6 @@ extern int psbfb_probed(struct drm_device *dev);
 extern int psbfb_remove(struct drm_device *dev,
 			struct drm_framebuffer *fb);
 /* accel_2d.c */
-extern void psbfb_copyarea(struct fb_info *info,
-					const struct fb_copyarea *region);
-extern int psbfb_sync(struct fb_info *info);
 extern void psb_spank(struct drm_psb_private *dev_priv);
 
 /* psb_reset.c */