Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 141d87e7 authored by Michael Hennerich's avatar Michael Hennerich Committed by Linus Torvalds
Browse files

Video/Framebuffer: add fuctional power management support to Blackfin BF54x... 


Video/Framebuffer: add fuctional power management support to Blackfin BF54x LQ043 framebuffer driver

Fix bug: does nor properply resume after suspend mem
Fix for PM_SUSPEND_MEM: Save and restore peripheral base and DMA registers

Signed-off-by: default avatarMichael Hennerich <michael.hennerich@analog.com>
Signed-off-by: default avatarBryan Wu <cooloney@kernel.org>
Acked-by: default avatarKrzysztof Helt <krzysztof.h1@wp.pl>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 481ebd0d

drivers/video/bf54x-lq043fb.c

+12 −3
Original line number Diff line number Diff line
@@ -733,7 +733,6 @@ static int bfin_bf54x_remove(struct platform_device *pdev) 
static int bfin_bf54x_suspend(struct platform_device *pdev, pm_message_t state)

{

	struct fb_info *fbinfo = platform_get_drvdata(pdev);

	struct bfin_bf54xfb_info *info = fbinfo->par;



	bfin_write_EPPI0_CONTROL(bfin_read_EPPI0_CONTROL() & ~EPPI_EN);

	disable_dma(CH_EPPI0);
@@ -747,8 +746,18 @@ static int bfin_bf54x_resume(struct platform_device *pdev) 
	struct fb_info *fbinfo = platform_get_drvdata(pdev);

	struct bfin_bf54xfb_info *info = fbinfo->par;



	if (info->lq043_open_cnt) {



		bfin_write_EPPI0_CONTROL(0);

		SSYNC();



		config_dma(info);

		config_ppi(info);



		/* start dma */

		enable_dma(CH_EPPI0);

		bfin_write_EPPI0_CONTROL(bfin_read_EPPI0_CONTROL() | EPPI_EN);

	}



	return 0;

}