From 9a1c779e6b06855e41099caa6f15b3b584dfa88c Mon Sep 17 00:00:00 2001 From: Liam Beguin Date: Fri, 7 Apr 2017 17:03:24 +0200 Subject: [PATCH] video: ARM CLCD: fix dma allocation size 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 Signed-off-by: Sylvain Lemieux Cc: Vladimir Zapolskiy Cc: Russell King Signed-off-by: Bartlomiej Zolnierkiewicz --- drivers/video/fbdev/amba-clcd.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/video/fbdev/amba-clcd.c b/drivers/video/fbdev/amba-clcd.c index 0fab92c..ffc2c33c 100644 --- a/drivers/video/fbdev/amba-clcd.c +++ b/drivers/video/fbdev/amba-clcd.c @@ -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) -- 2.7.4