--- /dev/null
+/*
+ * Copyright 2013 Matrox Graphics
+ *
+ * This file is subject to the terms and conditions of the GNU General
+ * Public License version 2. See the file COPYING in the main
+ * directory of this archive for more details.
+ *
+ * Author: Christopher Harvey <charvey@matrox.com>
+ */
+
+#include <drm/drmP.h>
+#include "mgag200_drv.h"
+
+static bool warn_transparent = true;
+static bool warn_palette = true;
+
+/*
+ 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 mga_hide_cursor(struct mga_device *mdev)
+{
+ WREG8(MGA_CURPOSXL, 0);
+ WREG8(MGA_CURPOSXH, 0);
+ if (mdev->cursor.pixels_1->pin_count)
+ mgag200_bo_unpin(mdev->cursor.pixels_1);
+ if (mdev->cursor.pixels_2->pin_count)
+ mgag200_bo_unpin(mdev->cursor.pixels_2);
+}
+
+int mga_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 = (struct mga_device *)dev->dev_private;
+ struct mgag200_bo *pixels_1 = mdev->cursor.pixels_1;
+ struct mgag200_bo *pixels_2 = mdev->cursor.pixels_2;
+ struct mgag200_bo *pixels_current = mdev->cursor.pixels_current;
+ struct mgag200_bo *pixels_prev = mdev->cursor.pixels_prev;
+ struct drm_gem_object *obj;
+ struct mgag200_bo *bo = NULL;
+ int ret = 0;
+ 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;
+ u64 gpu_addr;
+ u8 reg_index;
+ u8 this_row[48];
+
+ if (!pixels_1 || !pixels_2) {
+ WREG8(MGA_CURPOSXL, 0);
+ WREG8(MGA_CURPOSXH, 0);
+ return -ENOTSUPP; /* Didn't allocate space for cursors */
+ }
+
+ if ((width != 64 || height != 64) && handle) {
+ WREG8(MGA_CURPOSXL, 0);
+ WREG8(MGA_CURPOSXH, 0);
+ return -EINVAL;
+ }
+
+ BUG_ON(pixels_1 != pixels_current && pixels_1 != pixels_prev);
+ BUG_ON(pixels_2 != pixels_current && pixels_2 != pixels_prev);
+ BUG_ON(pixels_current == pixels_prev);
+
+ ret = mgag200_bo_reserve(pixels_1, true);
+ if (ret) {
+ WREG8(MGA_CURPOSXL, 0);
+ WREG8(MGA_CURPOSXH, 0);
+ return ret;
+ }
+ ret = mgag200_bo_reserve(pixels_2, true);
+ if (ret) {
+ WREG8(MGA_CURPOSXL, 0);
+ WREG8(MGA_CURPOSXH, 0);
+ mgag200_bo_unreserve(pixels_1);
+ return ret;
+ }
+
+ if (!handle) {
+ mga_hide_cursor(mdev);
+ ret = 0;
+ goto out1;
+ }
+
+ /* Move cursor buffers into VRAM if they aren't already */
+ if (!pixels_1->pin_count) {
+ ret = mgag200_bo_pin(pixels_1, TTM_PL_FLAG_VRAM,
+ &mdev->cursor.pixels_1_gpu_addr);
+ if (ret)
+ goto out1;
+ }
+ if (!pixels_2->pin_count) {
+ ret = mgag200_bo_pin(pixels_2, TTM_PL_FLAG_VRAM,
+ &mdev->cursor.pixels_2_gpu_addr);
+ if (ret) {
+ mgag200_bo_unpin(pixels_1);
+ goto out1;
+ }
+ }
+
+ mutex_lock(&dev->struct_mutex);
+ obj = drm_gem_object_lookup(dev, file_priv, handle);
+ if (!obj) {
+ mutex_unlock(&dev->struct_mutex);
+ ret = -ENOENT;
+ goto out1;
+ }
+ drm_gem_object_unreference(obj);
+ mutex_unlock(&dev->struct_mutex);
+
+ bo = gem_to_mga_bo(obj);
+ ret = mgag200_bo_reserve(bo, true);
+ if (ret) {
+ dev_err(&dev->pdev->dev, "failed to reserve user bo\n");
+ goto out1;
+ }
+ if (!bo->kmap.virtual) {
+ ret = ttm_bo_kmap(&bo->bo, 0, bo->bo.num_pages, &bo->kmap);
+ if (ret) {
+ dev_err(&dev->pdev->dev, "failed to kmap user buffer updates\n");
+ goto out2;
+ }
+ }
+
+ memset(&colour_set[0], 0, sizeof(uint32_t)*16);
+ /* width*height*4 = 16384 */
+ for (i = 0; i < 16384; i += 4) {
+ this_colour = ioread32(bo->kmap.virtual + 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. */
+ }
+ ret = -EINVAL;
+ goto out3;
+ }
+ /* 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. */
+ }
+ ret = -EINVAL;
+ goto out3;
+ }
+ *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);
+ }
+
+ /* Map up-coming buffer to write colour indices */
+ if (!pixels_prev->kmap.virtual) {
+ ret = ttm_bo_kmap(&pixels_prev->bo, 0,
+ pixels_prev->bo.num_pages,
+ &pixels_prev->kmap);
+ if (ret) {
+ dev_err(&dev->pdev->dev, "failed to kmap cursor updates\n");
+ goto out3;
+ }
+ }
+
+ /* 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(bo->kmap.virtual + 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(pixels_prev->kmap.virtual + row*48, &this_row[0], 48);
+ }
+
+ /* Program gpu address of cursor buffer */
+ if (pixels_prev == pixels_1)
+ gpu_addr = mdev->cursor.pixels_1_gpu_addr;
+ else
+ gpu_addr = mdev->cursor.pixels_2_gpu_addr;
+ WREG_DAC(MGA1064_CURSOR_BASE_ADR_LOW, (u8)((gpu_addr>>10) & 0xff));
+ WREG_DAC(MGA1064_CURSOR_BASE_ADR_HI, (u8)((gpu_addr>>18) & 0x3f));
+
+ /* Adjust cursor control register to turn on the cursor */
+ WREG_DAC(MGA1064_CURSOR_CTL, 4); /* 16-colour palletized cursor mode */
+
+ /* Now swap internal buffer pointers */
+ if (mdev->cursor.pixels_1 == mdev->cursor.pixels_prev) {
+ mdev->cursor.pixels_prev = mdev->cursor.pixels_2;
+ mdev->cursor.pixels_current = mdev->cursor.pixels_1;
+ } else if (mdev->cursor.pixels_1 == mdev->cursor.pixels_current) {
+ mdev->cursor.pixels_prev = mdev->cursor.pixels_1;
+ mdev->cursor.pixels_current = mdev->cursor.pixels_2;
+ } else {
+ BUG();
+ }
+ ret = 0;
+
+ ttm_bo_kunmap(&pixels_prev->kmap);
+ out3:
+ ttm_bo_kunmap(&bo->kmap);
+ out2:
+ mgag200_bo_unreserve(bo);
+ out1:
+ if (ret)
+ mga_hide_cursor(mdev);
+ mgag200_bo_unreserve(pixels_1);
+ mgag200_bo_unreserve(pixels_2);
+ return ret;
+}
+
+int mga_crtc_cursor_move(struct drm_crtc *crtc, int x, int y)
+{
+ struct mga_device *mdev = (struct mga_device *)crtc->dev->dev_private;
+ /* Our origin is at (64,64) */
+ x += 64;
+ y += 64;
+
+ BUG_ON(x <= 0);
+ BUG_ON(y <= 0);
+ BUG_ON(x & ~0xffff);
+ BUG_ON(y & ~0xffff);
+
+ WREG8(MGA_CURPOSXL, x & 0xff);
+ WREG8(MGA_CURPOSXH, (x>>8) & 0xff);
+
+ WREG8(MGA_CURPOSYL, y & 0xff);
+ WREG8(MGA_CURPOSYH, (y>>8) & 0xff);
+ return 0;
+}
Code Review / kvmfornfv.git / blobdiff