mirror of https://gitee.com/openkylin/linux.git
272 lines
7.1 KiB
C
272 lines
7.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright 2013 Matrox Graphics
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*
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* Author: Christopher Harvey <charvey@matrox.com>
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*/
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#include <drm/drmP.h>
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#include "mgag200_drv.h"
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static bool warn_transparent = true;
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static bool warn_palette = true;
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/*
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Hide the cursor off screen. We can't disable the cursor hardware because it
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takes too long to re-activate and causes momentary corruption
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*/
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static void mga_hide_cursor(struct mga_device *mdev)
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{
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WREG8(MGA_CURPOSXL, 0);
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WREG8(MGA_CURPOSXH, 0);
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if (mdev->cursor.pixels_1->pin_count)
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mgag200_bo_unpin(mdev->cursor.pixels_1);
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if (mdev->cursor.pixels_2->pin_count)
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mgag200_bo_unpin(mdev->cursor.pixels_2);
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}
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int mga_crtc_cursor_set(struct drm_crtc *crtc,
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struct drm_file *file_priv,
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uint32_t handle,
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uint32_t width,
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uint32_t height)
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{
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struct drm_device *dev = crtc->dev;
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struct mga_device *mdev = (struct mga_device *)dev->dev_private;
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struct mgag200_bo *pixels_1 = mdev->cursor.pixels_1;
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struct mgag200_bo *pixels_2 = mdev->cursor.pixels_2;
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struct mgag200_bo *pixels_current = mdev->cursor.pixels_current;
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struct mgag200_bo *pixels_prev = mdev->cursor.pixels_prev;
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struct drm_gem_object *obj;
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struct mgag200_bo *bo = NULL;
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int ret = 0;
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unsigned int i, row, col;
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uint32_t colour_set[16];
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uint32_t *next_space = &colour_set[0];
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uint32_t *palette_iter;
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uint32_t this_colour;
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bool found = false;
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int colour_count = 0;
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u64 gpu_addr;
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u8 reg_index;
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u8 this_row[48];
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if (!pixels_1 || !pixels_2) {
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WREG8(MGA_CURPOSXL, 0);
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WREG8(MGA_CURPOSXH, 0);
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return -ENOTSUPP; /* Didn't allocate space for cursors */
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}
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if ((width != 64 || height != 64) && handle) {
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WREG8(MGA_CURPOSXL, 0);
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WREG8(MGA_CURPOSXH, 0);
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return -EINVAL;
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}
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BUG_ON(pixels_1 != pixels_current && pixels_1 != pixels_prev);
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BUG_ON(pixels_2 != pixels_current && pixels_2 != pixels_prev);
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BUG_ON(pixels_current == pixels_prev);
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if (!handle || !file_priv) {
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mga_hide_cursor(mdev);
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return 0;
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}
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obj = drm_gem_object_lookup(file_priv, handle);
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if (!obj)
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return -ENOENT;
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ret = mgag200_bo_reserve(pixels_1, true);
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if (ret) {
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WREG8(MGA_CURPOSXL, 0);
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WREG8(MGA_CURPOSXH, 0);
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goto out_unref;
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}
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ret = mgag200_bo_reserve(pixels_2, true);
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if (ret) {
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WREG8(MGA_CURPOSXL, 0);
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WREG8(MGA_CURPOSXH, 0);
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mgag200_bo_unreserve(pixels_1);
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goto out_unreserve1;
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}
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/* Move cursor buffers into VRAM if they aren't already */
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if (!pixels_1->pin_count) {
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ret = mgag200_bo_pin(pixels_1, TTM_PL_FLAG_VRAM,
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&mdev->cursor.pixels_1_gpu_addr);
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if (ret)
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goto out1;
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}
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if (!pixels_2->pin_count) {
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ret = mgag200_bo_pin(pixels_2, TTM_PL_FLAG_VRAM,
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&mdev->cursor.pixels_2_gpu_addr);
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if (ret) {
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mgag200_bo_unpin(pixels_1);
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goto out1;
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}
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}
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bo = gem_to_mga_bo(obj);
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ret = mgag200_bo_reserve(bo, true);
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if (ret) {
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dev_err(&dev->pdev->dev, "failed to reserve user bo\n");
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goto out1;
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}
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if (!bo->kmap.virtual) {
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ret = ttm_bo_kmap(&bo->bo, 0, bo->bo.num_pages, &bo->kmap);
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if (ret) {
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dev_err(&dev->pdev->dev, "failed to kmap user buffer updates\n");
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goto out2;
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}
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}
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memset(&colour_set[0], 0, sizeof(uint32_t)*16);
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/* width*height*4 = 16384 */
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for (i = 0; i < 16384; i += 4) {
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this_colour = ioread32(bo->kmap.virtual + i);
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/* No transparency */
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if (this_colour>>24 != 0xff &&
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this_colour>>24 != 0x0) {
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if (warn_transparent) {
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dev_info(&dev->pdev->dev, "Video card doesn't support cursors with partial transparency.\n");
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dev_info(&dev->pdev->dev, "Not enabling hardware cursor.\n");
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warn_transparent = false; /* Only tell the user once. */
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}
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ret = -EINVAL;
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goto out3;
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}
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/* Don't need to store transparent pixels as colours */
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if (this_colour>>24 == 0x0)
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continue;
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found = false;
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for (palette_iter = &colour_set[0]; palette_iter != next_space; palette_iter++) {
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if (*palette_iter == this_colour) {
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found = true;
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break;
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}
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}
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if (found)
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continue;
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/* We only support 4bit paletted cursors */
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if (colour_count >= 16) {
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if (warn_palette) {
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dev_info(&dev->pdev->dev, "Video card only supports cursors with up to 16 colours.\n");
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dev_info(&dev->pdev->dev, "Not enabling hardware cursor.\n");
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warn_palette = false; /* Only tell the user once. */
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}
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ret = -EINVAL;
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goto out3;
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}
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*next_space = this_colour;
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next_space++;
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colour_count++;
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}
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/* Program colours from cursor icon into palette */
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for (i = 0; i < colour_count; i++) {
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if (i <= 2)
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reg_index = 0x8 + i*0x4;
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else
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reg_index = 0x60 + i*0x3;
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WREG_DAC(reg_index, colour_set[i] & 0xff);
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WREG_DAC(reg_index+1, colour_set[i]>>8 & 0xff);
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WREG_DAC(reg_index+2, colour_set[i]>>16 & 0xff);
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BUG_ON((colour_set[i]>>24 & 0xff) != 0xff);
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}
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/* Map up-coming buffer to write colour indices */
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if (!pixels_prev->kmap.virtual) {
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ret = ttm_bo_kmap(&pixels_prev->bo, 0,
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pixels_prev->bo.num_pages,
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&pixels_prev->kmap);
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if (ret) {
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dev_err(&dev->pdev->dev, "failed to kmap cursor updates\n");
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goto out3;
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}
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}
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/* now write colour indices into hardware cursor buffer */
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for (row = 0; row < 64; row++) {
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memset(&this_row[0], 0, 48);
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for (col = 0; col < 64; col++) {
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this_colour = ioread32(bo->kmap.virtual + 4*(col + 64*row));
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/* write transparent pixels */
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if (this_colour>>24 == 0x0) {
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this_row[47 - col/8] |= 0x80>>(col%8);
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continue;
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}
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/* write colour index here */
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for (i = 0; i < colour_count; i++) {
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if (colour_set[i] == this_colour) {
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if (col % 2)
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this_row[col/2] |= i<<4;
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else
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this_row[col/2] |= i;
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break;
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}
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}
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}
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memcpy_toio(pixels_prev->kmap.virtual + row*48, &this_row[0], 48);
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}
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/* Program gpu address of cursor buffer */
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if (pixels_prev == pixels_1)
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gpu_addr = mdev->cursor.pixels_1_gpu_addr;
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else
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gpu_addr = mdev->cursor.pixels_2_gpu_addr;
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WREG_DAC(MGA1064_CURSOR_BASE_ADR_LOW, (u8)((gpu_addr>>10) & 0xff));
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WREG_DAC(MGA1064_CURSOR_BASE_ADR_HI, (u8)((gpu_addr>>18) & 0x3f));
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/* Adjust cursor control register to turn on the cursor */
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WREG_DAC(MGA1064_CURSOR_CTL, 4); /* 16-colour palletized cursor mode */
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/* Now swap internal buffer pointers */
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if (mdev->cursor.pixels_1 == mdev->cursor.pixels_prev) {
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mdev->cursor.pixels_prev = mdev->cursor.pixels_2;
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mdev->cursor.pixels_current = mdev->cursor.pixels_1;
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} else if (mdev->cursor.pixels_1 == mdev->cursor.pixels_current) {
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mdev->cursor.pixels_prev = mdev->cursor.pixels_1;
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mdev->cursor.pixels_current = mdev->cursor.pixels_2;
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} else {
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BUG();
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}
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ret = 0;
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ttm_bo_kunmap(&pixels_prev->kmap);
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out3:
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ttm_bo_kunmap(&bo->kmap);
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out2:
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mgag200_bo_unreserve(bo);
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out1:
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if (ret)
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mga_hide_cursor(mdev);
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mgag200_bo_unreserve(pixels_1);
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out_unreserve1:
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mgag200_bo_unreserve(pixels_2);
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out_unref:
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drm_gem_object_put_unlocked(obj);
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return ret;
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}
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int mga_crtc_cursor_move(struct drm_crtc *crtc, int x, int y)
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{
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struct mga_device *mdev = (struct mga_device *)crtc->dev->dev_private;
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/* Our origin is at (64,64) */
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x += 64;
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y += 64;
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BUG_ON(x <= 0);
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BUG_ON(y <= 0);
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BUG_ON(x & ~0xffff);
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BUG_ON(y & ~0xffff);
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WREG8(MGA_CURPOSXL, x & 0xff);
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WREG8(MGA_CURPOSXH, (x>>8) & 0xff);
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WREG8(MGA_CURPOSYL, y & 0xff);
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WREG8(MGA_CURPOSYH, (y>>8) & 0xff);
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return 0;
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}
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