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video: ARM CLCD: fix dma allocation size

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This patch forces the frambuffer size to be aligned on kernel pages.

During the board startup, the splash screed did appear;
the "ts_test" program or our application were not able to start.

The following error message was reported:
error: failed to map framebuffer device to memory.
LinuxFB: driver cannot connect

The issue was discovered, on the LPC32xx platform, during the migration
of the LCD definition from the board file to the device tree.

Signed-off-by: Liam Beguin <[email protected]>
Signed-off-by: Sylvain Lemieux <[email protected]>
Cc: Vladimir Zapolskiy <[email protected]>
Cc: Russell King <[email protected]>
Signed-off-by: Bartlomiej Zolnierkiewicz <[email protected]>
This commit is contained in:
Liam Beguin 2017-04-07 17:03:24 +02:00 • committed by Bartlomiej Zolnierkiewicz
commit 9a1c779e6b
1 changed files with 2 additions and 2 deletions
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4
drivers/video/fbdev/amba-clcd.c
View file

@ -881,8 +881,8 @@ static int clcdfb_of_dma_setup(struct clcd_fb *fb)
if (err)
return err;
framesize = fb->panel->mode.xres * fb->panel->mode.yres *
fb->panel->bpp / 8;
framesize = PAGE_ALIGN(fb->panel->mode.xres * fb->panel->mode.yres *
fb->panel->bpp / 8);
fb->fb.screen_base = dma_alloc_coherent(&fb->dev->dev, framesize,
&dma, GFP_KERNEL);
if (!fb->fb.screen_base)