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Reduce the maximum mapped size of the linear frame buffer.

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This is needed for subsequent changes. If we do ever get presented with
a frame buffer larger than 8192x8192 pixels, we'll need to think again
about how to manage it.
This commit is contained in:
Martin Whitaker 2022-02-21 11:26:00 +00:00
parent 15b233cc89
commit 6b570cd779
1 changed files with 5 additions and 5 deletions
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10
system/screen.c
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@ -1,5 +1,5 @@
// SPDX-License-Identifier: GPL-2.0 // SPDX-License-Identifier: GPL-2.0
// Copyright (C) 2020-2021 Martin Whitaker // Copyright (C) 2020-2022 Martin Whitaker
#include <stdbool.h> #include <stdbool.h>
#include <stdint.h> #include <stdint.h>
@ -209,12 +209,12 @@ void screen_init(void)
#endif #endif
lfb_stride = screen_info->lfb_linelength; lfb_stride = screen_info->lfb_linelength;
// Clip the framebuffer size to make sure we can map it into the 1GB device region. // Clip the framebuffer size to make sure we can map it into the 0.5GB device region.
// This will produce a garbled display, but that's better than nothing. // This will produce a garbled display, but that's better than nothing.
if (lfb_width > 16384) lfb_width = 16384; if (lfb_width > 8192) lfb_width = 8192;
if (lfb_height > 16384) lfb_height = 16384; if (lfb_height > 8192) lfb_height = 8192;
// This is the first device we map, so the above clipping should guarantee it never fails. // The above clipping should guarantee the mapping never fails.
lfb_base = map_device(lfb_base, lfb_height * lfb_width * lfb_bytes_per_pixel); lfb_base = map_device(lfb_base, lfb_height * lfb_width * lfb_bytes_per_pixel);
// Blank the whole framebuffer. // Blank the whole framebuffer.