drm/mgag200: Remove mgag200_cursor.c

Support for HW cursors got remove by commit 5a77e2bf ("drm/mgag200:
Remove HW cursor") Apparently the source file was not deleted. Removed
it now.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Fixes: 5a77e2bf ("drm/mgag200: Remove HW cursor")
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Emil Velikov <emil.velikov@collabora.com>
Cc: Dave Airlie <airlied@redhat.com>
Cc: "Noralf Trønnes" <noralf@tronnes.org>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Kate Stewart <kstewart@linuxfoundation.org>
Cc: Allison Randal <allison@lohutok.net>
Cc: Andrzej Pietrasiewicz <andrzej.p@collabora.com>
Cc: "José Roberto de Souza" <jose.souza@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200605135803.19811-3-tzimmermann@suse.de

drivers/gpu/drm/mgag200/mgag200_cursor.c

-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Copyright 2013 Matrox Graphics
- *
- * Author: Christopher Harvey <charvey@matrox.com>
- */
-
-#include <linux/pci.h>
-
-#include "mgag200_drv.h"
-
-static bool warn_transparent = true;
-static bool warn_palette = true;
-
-static int mgag200_cursor_update(struct mga_device *mdev, void *dst, void *src,
-				 unsigned int width, unsigned int height)
-{
-	struct drm_device *dev = mdev->dev;
-	unsigned int i, row, col;
-	uint32_t colour_set[16];
-	uint32_t *next_space = &colour_set[0];
-	uint32_t *palette_iter;
-	uint32_t this_colour;
-	bool found = false;
-	int colour_count = 0;
-	u8 reg_index;
-	u8 this_row[48];
-
-	memset(&colour_set[0], 0, sizeof(uint32_t)*16);
-	/* width*height*4 = 16384 */
-	for (i = 0; i < 16384; i += 4) {
-		this_colour = ioread32(src + i);
-		/* No transparency */
-		if (this_colour>>24 != 0xff &&
-			this_colour>>24 != 0x0) {
-			if (warn_transparent) {
-				dev_info(&dev->pdev->dev, "Video card doesn't support cursors with partial transparency.\n");
-				dev_info(&dev->pdev->dev, "Not enabling hardware cursor.\n");
-				warn_transparent = false; /* Only tell the user once. */
-			}
-			return -EINVAL;
-		}
-		/* Don't need to store transparent pixels as colours */
-		if (this_colour>>24 == 0x0)
-			continue;
-		found = false;
-		for (palette_iter = &colour_set[0]; palette_iter != next_space; palette_iter++) {
-			if (*palette_iter == this_colour) {
-				found = true;
-				break;
-			}
-		}
-		if (found)
-			continue;
-		/* We only support 4bit paletted cursors */
-		if (colour_count >= 16) {
-			if (warn_palette) {
-				dev_info(&dev->pdev->dev, "Video card only supports cursors with up to 16 colours.\n");
-				dev_info(&dev->pdev->dev, "Not enabling hardware cursor.\n");
-				warn_palette = false; /* Only tell the user once. */
-			}
-			return -EINVAL;
-		}
-		*next_space = this_colour;
-		next_space++;
-		colour_count++;
-	}
-
-	/* Program colours from cursor icon into palette */
-	for (i = 0; i < colour_count; i++) {
-		if (i <= 2)
-			reg_index = 0x8 + i*0x4;
-		else
-			reg_index = 0x60 + i*0x3;
-		WREG_DAC(reg_index, colour_set[i] & 0xff);
-		WREG_DAC(reg_index+1, colour_set[i]>>8 & 0xff);
-		WREG_DAC(reg_index+2, colour_set[i]>>16 & 0xff);
-		BUG_ON((colour_set[i]>>24 & 0xff) != 0xff);
-	}
-
-	/* now write colour indices into hardware cursor buffer */
-	for (row = 0; row < 64; row++) {
-		memset(&this_row[0], 0, 48);
-		for (col = 0; col < 64; col++) {
-			this_colour = ioread32(src + 4*(col + 64*row));
-			/* write transparent pixels */
-			if (this_colour>>24 == 0x0) {
-				this_row[47 - col/8] |= 0x80>>(col%8);
-				continue;
-			}
-
-			/* write colour index here */
-			for (i = 0; i < colour_count; i++) {
-				if (colour_set[i] == this_colour) {
-					if (col % 2)
-						this_row[col/2] |= i<<4;
-					else
-						this_row[col/2] |= i;
-					break;
-				}
-			}
-		}
-		memcpy_toio(dst + row*48, &this_row[0], 48);
-	}
-
-	return 0;
-}
-
-static void mgag200_cursor_set_base(struct mga_device *mdev, u64 address)
-{
-	u8 addrl = (address >> 10) & 0xff;
-	u8 addrh = (address >> 18) & 0x3f;
-
-	/* Program gpu address of cursor buffer */
-	WREG_DAC(MGA1064_CURSOR_BASE_ADR_LOW, addrl);
-	WREG_DAC(MGA1064_CURSOR_BASE_ADR_HI, addrh);
-}
-
-static int mgag200_show_cursor(struct mga_device *mdev, void *src,
-			       unsigned int width, unsigned int height)
-{
-	struct drm_device *dev = mdev->dev;
-	struct drm_gem_vram_object *gbo;
-	void *dst;
-	s64 off;
-	int ret;
-
-	gbo = mdev->cursor.gbo[mdev->cursor.next_index];
-	if (!gbo) {
-		WREG8(MGA_CURPOSXL, 0);
-		WREG8(MGA_CURPOSXH, 0);
-		return -ENOTSUPP; /* Didn't allocate space for cursors */
-	}
-	dst = drm_gem_vram_vmap(gbo);
-	if (IS_ERR(dst)) {
-		ret = PTR_ERR(dst);
-		dev_err(&dev->pdev->dev,
-			"failed to map cursor updates: %d\n", ret);
-		return ret;
-	}
-	off = drm_gem_vram_offset(gbo);
-	if (off < 0) {
-		ret = (int)off;
-		dev_err(&dev->pdev->dev,
-			"failed to get cursor scanout address: %d\n", ret);
-		goto err_drm_gem_vram_vunmap;
-	}
-
-	ret = mgag200_cursor_update(mdev, dst, src, width, height);
-	if (ret)
-		goto err_drm_gem_vram_vunmap;
-	mgag200_cursor_set_base(mdev, off);
-
-	/* Adjust cursor control register to turn on the cursor */
-	WREG_DAC(MGA1064_CURSOR_CTL, 4); /* 16-colour palletized cursor mode */
-
-	drm_gem_vram_vunmap(gbo, dst);
-
-	++mdev->cursor.next_index;
-	mdev->cursor.next_index %= ARRAY_SIZE(mdev->cursor.gbo);
-
-	return 0;
-
-err_drm_gem_vram_vunmap:
-	drm_gem_vram_vunmap(gbo, dst);
-	return ret;
-}
-
-/*
- * Hide the cursor off screen. We can't disable the cursor hardware because
- * it takes too long to re-activate and causes momentary corruption.
- */
-static void mgag200_hide_cursor(struct mga_device *mdev)
-{
-	WREG8(MGA_CURPOSXL, 0);
-	WREG8(MGA_CURPOSXH, 0);
-}
-
-static void mgag200_move_cursor(struct mga_device *mdev, int x, int y)
-{
-	if (WARN_ON(x <= 0))
-		return;
-	if (WARN_ON(y <= 0))
-		return;
-	if (WARN_ON(x & ~0xffff))
-		return;
-	if (WARN_ON(y & ~0xffff))
-		return;
-
-	WREG8(MGA_CURPOSXL, x & 0xff);
-	WREG8(MGA_CURPOSXH, (x>>8) & 0xff);
-
-	WREG8(MGA_CURPOSYL, y & 0xff);
-	WREG8(MGA_CURPOSYH, (y>>8) & 0xff);
-}
-
-int mgag200_cursor_init(struct mga_device *mdev)
-{
-	struct drm_device *dev = mdev->dev;
-	size_t ncursors = ARRAY_SIZE(mdev->cursor.gbo);
-	size_t size;
-	int ret;
-	size_t i;
-	struct drm_gem_vram_object *gbo;
-
-	size = roundup(64 * 48, PAGE_SIZE);
-	if (size * ncursors > mdev->vram_fb_available)
-		return -ENOMEM;
-
-	for (i = 0; i < ncursors; ++i) {
-		gbo = drm_gem_vram_create(dev, size, 0);
-		if (IS_ERR(gbo)) {
-			ret = PTR_ERR(gbo);
-			goto err_drm_gem_vram_put;
-		}
-		ret = drm_gem_vram_pin(gbo, DRM_GEM_VRAM_PL_FLAG_VRAM |
-					    DRM_GEM_VRAM_PL_FLAG_TOPDOWN);
-		if (ret) {
-			drm_gem_vram_put(gbo);
-			goto err_drm_gem_vram_put;
-		}
-
-		mdev->cursor.gbo[i] = gbo;
-	}
-
-	/*
-	 * At the high end of video memory, we reserve space for
-	 * buffer objects. The cursor plane uses this memory to store
-	 * a double-buffered image of the current cursor. Hence, it's
-	 * not available for framebuffers.
-	 */
-	mdev->vram_fb_available -= ncursors * size;
-
-	return 0;
-
-err_drm_gem_vram_put:
-	while (i) {
-		--i;
-		gbo = mdev->cursor.gbo[i];
-		drm_gem_vram_unpin(gbo);
-		drm_gem_vram_put(gbo);
-		mdev->cursor.gbo[i] = NULL;
-	}
-	return ret;
-}
-
-void mgag200_cursor_fini(struct mga_device *mdev)
-{
-	size_t i;
-	struct drm_gem_vram_object *gbo;
-
-	for (i = 0; i < ARRAY_SIZE(mdev->cursor.gbo); ++i) {
-		gbo = mdev->cursor.gbo[i];
-		drm_gem_vram_unpin(gbo);
-		drm_gem_vram_put(gbo);
-	}
-}
-
-int mgag200_crtc_cursor_set(struct drm_crtc *crtc, struct drm_file *file_priv,
-			    uint32_t handle, uint32_t width, uint32_t height)
-{
-	struct drm_device *dev = crtc->dev;
-	struct mga_device *mdev = to_mga_device(dev);
-	struct drm_gem_object *obj;
-	struct drm_gem_vram_object *gbo = NULL;
-	int ret;
-	u8 *src;
-
-	if (!handle || !file_priv) {
-		mgag200_hide_cursor(mdev);
-		return 0;
-	}
-
-	if (width != 64 || height != 64) {
-		WREG8(MGA_CURPOSXL, 0);
-		WREG8(MGA_CURPOSXH, 0);
-		return -EINVAL;
-	}
-
-	obj = drm_gem_object_lookup(file_priv, handle);
-	if (!obj)
-		return -ENOENT;
-	gbo = drm_gem_vram_of_gem(obj);
-	src = drm_gem_vram_vmap(gbo);
-	if (IS_ERR(src)) {
-		ret = PTR_ERR(src);
-		dev_err(&dev->pdev->dev,
-			"failed to map user buffer updates\n");
-		goto err_drm_gem_object_put;
-	}
-
-	ret = mgag200_show_cursor(mdev, src, width, height);
-	if (ret)
-		goto err_drm_gem_vram_vunmap;
-
-	/* Now update internal buffer pointers */
-	drm_gem_vram_vunmap(gbo, src);
-	drm_gem_object_put(obj);
-
-	return 0;
-err_drm_gem_vram_vunmap:
-	drm_gem_vram_vunmap(gbo, src);
-err_drm_gem_object_put:
-	drm_gem_object_put(obj);
-	return ret;
-}
-
-int mgag200_crtc_cursor_move(struct drm_crtc *crtc, int x, int y)
-{
-	struct mga_device *mdev = to_mga_device(crtc->dev);
-
-	/* Our origin is at (64,64) */
-	x += 64;
-	y += 64;
-
-	mgag200_move_cursor(mdev, x, y);
-
-	return 0;
-}