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DM320: Regorganize LCD and TTB memory layout

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Do not introduce any change for M:Robe 500 as it uses the two LCD frames
in non-obvious way.

Sansa Connect and Creative ZVM use only single front framebuffer.
Place TTB at DRAM end to minimize memory loss due to alignment.
Reserve as little as possible memory for the LCD frames.
On Sansa Connect this change extends audio buffer by 858 KiB.

Change-Id: I21bdeec4cfba86d71803a39acd651a87e73767e6
This commit is contained in:
Tomasz Moń 2021-07-08 18:23:18 +02:00
parent 2e9b93dc5d
commit 60e2cd6de9
4 changed files with 93 additions and 42 deletions
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11
apps/plugins/plugin.lds
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@ -36,7 +36,6 @@ OUTPUT_FORMAT(elf32-littlemips)
#elif CONFIG_CPU==DM320
/* Give this 1 meg to allow it to align to the MMU boundary */
#ifndef LCD_NATIVE_WIDTH
#define LCD_NATIVE_WIDTH LCD_WIDTH
#endif
@ -45,9 +44,17 @@ OUTPUT_FORMAT(elf32-littlemips)
#define LCD_NATIVE_HEIGHT LCD_HEIGHT
#endif
#ifdef MROBE_500
/* Give this 1 meg to allow it to align to the MMU boundary */
#define LCD_FUDGE LCD_NATIVE_WIDTH%32
#define LCD_BUFFER_SIZE ((LCD_NATIVE_WIDTH+LCD_FUDGE)*LCD_NATIVE_HEIGHT*2)
#define LCD_BUFFER_SIZE ((LCD_NATIVE_WIDTH+LCD_FUDGE)*LCD_NATIVE_HEIGHT*2)
#define LCD_TTB_AREA 0x100000*((LCD_BUFFER_SIZE>>19)+1)
#else
/* must be 16Kb (0x4000) aligned */
#define TTB_SIZE (0x4000)
#define LCD_BUFFER_SIZE (LCD_NATIVE_WIDTH*LCD_NATIVE_HEIGHT*2)
#define LCD_TTB_AREA (TTB_SIZE + LCD_BUFFER_SIZE)
#endif
#define DRAMSIZE (MEMORYSIZE * 0x100000) - STUBOFFSET - PLUGIN_BUFFER_SIZE - CODEC_SIZE - LCD_TTB_AREA