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Commit 92b4e450 authored by Manjunathappa, Prakash's avatar Manjunathappa, Prakash Committed by Florian Tobias Schandinat
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video: da8xx-fb: do clock reset of revision 2 LCDC before enabling 



As in specification software reset should be applied for several
cycles before bringing it out of reset. Without this patch
particularly during suspend and resume clock reset is not guaranteed
to happen.

Signed-off-by: default avatarManjunathappa, Prakash <prakash.pm@ti.com>
Signed-off-by: default avatarFlorian Tobias Schandinat <FlorianSchandinat@gmx.de>
parent a652aa79

drivers/video/da8xx-fb.c

+8 −4
Original line number Diff line number Diff line
@@ -269,10 +269,18 @@ static inline void lcd_enable_raster(void) 
{

	u32 reg;



	/* Put LCDC in reset for several cycles */

	if (lcd_revision == LCD_VERSION_2)

		/* Write 1 to reset LCDC */

		lcdc_write(LCD_CLK_MAIN_RESET, LCD_CLK_RESET_REG);

	mdelay(1);



	/* Bring LCDC out of reset */

	if (lcd_revision == LCD_VERSION_2)

		lcdc_write(0, LCD_CLK_RESET_REG);

	mdelay(1);



	/* Above reset sequence doesnot reset register context */

	reg = lcdc_read(LCD_RASTER_CTRL_REG);

	if (!(reg & LCD_RASTER_ENABLE))

		lcdc_write(reg | LCD_RASTER_ENABLE, LCD_RASTER_CTRL_REG);
@@ -286,10 +294,6 @@ static inline void lcd_disable_raster(void) 
	reg = lcdc_read(LCD_RASTER_CTRL_REG);

	if (reg & LCD_RASTER_ENABLE)

		lcdc_write(reg & ~LCD_RASTER_ENABLE, LCD_RASTER_CTRL_REG);



	if (lcd_revision == LCD_VERSION_2)

		/* Write 1 to reset LCDC */

		lcdc_write(LCD_CLK_MAIN_RESET, LCD_CLK_RESET_REG);

}



static void lcd_blit(int load_mode, struct da8xx_fb_par *par)