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SAMA5 LCDC: Back out the delay kludge. Increase the LCDC input clock from MCK to 2*MCK was sufficient for all timing instbility problems

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This commit is contained in:
Gregory Nutt 2014-07-12 11:24:14 -06:00
parent 424d47cfee
commit 8055a59d49
1 changed files with 0 additions and 12 deletions
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12
arch/arm/src/sama5/sam_lcd.c
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@ -2973,18 +2973,6 @@ int up_fbinitialize(void)
sam_show_hcr();
#endif
#if defined(BOARD_LCDC_ENABLE_DELAY) && BOARD_LCDC_ENABLE_DELAY > 0
/* Delay a bit after enabling the LDC. I presume that a delay of a few
* frame times allows some unstable clocking to synchronize before we
* start thrashing the framebuffer? But I am not sure why this is
* necessary and, in fact, is certainly not necessary in most LCDC
* configurations. Perhaps this delay would not be necessary if timings
* were more precise?
*/
usleep(BOARD_LCDC_ENABLE_DELAY);
#endif
/* Enable the backlight.
*
* REVISIT: Backlight level could be dynamically adjustable