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72 lines
1.7 KiB
72 lines
1.7 KiB
// SPDX-License-Identifier: GPL-2.0+ |
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/* |
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* (C) Copyright 2017 Rob Clark |
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*/ |
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#include <common.h> |
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#include <dm.h> |
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#include <fdtdec.h> |
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#include <fdt_support.h> |
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#include <video.h> |
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static int simple_video_probe(struct udevice *dev) |
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{ |
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struct video_uc_platdata *plat = dev_get_uclass_platdata(dev); |
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struct video_priv *uc_priv = dev_get_uclass_priv(dev); |
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const void *blob = gd->fdt_blob; |
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const int node = dev_of_offset(dev); |
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const char *format; |
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fdt_addr_t base; |
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fdt_size_t size; |
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base = fdtdec_get_addr_size_auto_parent(blob, dev_of_offset(dev->parent), |
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node, "reg", 0, &size, false); |
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if (base == FDT_ADDR_T_NONE) { |
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debug("%s: Failed to decode memory region\n", __func__); |
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return -EINVAL; |
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} |
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debug("%s: base=%llx, size=%llu\n", __func__, base, size); |
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/* |
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* TODO is there some way to reserve the framebuffer |
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* region so it isn't clobbered? |
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*/ |
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plat->base = base; |
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plat->size = size; |
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video_set_flush_dcache(dev, true); |
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debug("%s: Query resolution...\n", __func__); |
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uc_priv->xsize = fdtdec_get_uint(blob, node, "width", 0); |
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uc_priv->ysize = fdtdec_get_uint(blob, node, "height", 0); |
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uc_priv->rot = 0; |
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format = fdt_getprop(blob, node, "format", NULL); |
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debug("%s: %dx%d@%s\n", __func__, uc_priv->xsize, uc_priv->ysize, format); |
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if (strcmp(format, "r5g6b5") == 0) { |
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uc_priv->bpix = VIDEO_BPP16; |
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} else if (strcmp(format, "a8b8g8r8") == 0) { |
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uc_priv->bpix = VIDEO_BPP32; |
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} else { |
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printf("%s: invalid format: %s\n", __func__, format); |
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return -EINVAL; |
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} |
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return 0; |
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} |
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static const struct udevice_id simple_video_ids[] = { |
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{ .compatible = "simple-framebuffer" }, |
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{ } |
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}; |
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U_BOOT_DRIVER(simple_video) = { |
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.name = "simple_video", |
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.id = UCLASS_VIDEO, |
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.of_match = simple_video_ids, |
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.probe = simple_video_probe, |
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.flags = DM_FLAG_PRE_RELOC, |
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};
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