From 02ad70ea366cb2946cc7d7c14ddcbd0dabf3d3ff Mon Sep 17 00:00:00 2001 From: Aditya Nellutla Date: Thu, 29 Mar 2012 15:45:39 +0530 Subject: [PATCH 62/63] da8xx-fb: Rounding FB size to satisfy SGX buffer requirements In the real time use-case when SGX is used for rendering to FB buffers it has been observed that, the available memory from framebuffer driver is not sufficient for SGX under certain cases (like 16-bit WVGA resolution). SGX requires 2 swap buffers with each of the buffers aligned to lcm(line_length, PAGE_SIZE). Inorder to satisfy this requirement, we have two options, - Increase number of FB buffers (LCD_NUM_BUFFERS) to 3. This is not recommended as we end up wasting huge memory in most of the cases. - Align FB buffers to lcm(line_length, PAGE_SIZE).This ensures framebuffer size is increased to satisfy SGX requirements keeping alignment intact. This patch makes sure that FB allocates buffers aligned to above formula. Signed-off-by: Aditya Nellutla --- drivers/video/da8xx-fb.c | 5 ++++- 1 files changed, 4 insertions(+), 1 deletions(-) diff --git a/drivers/video/da8xx-fb.c b/drivers/video/da8xx-fb.c index 86b19ac..9aaca5d 100644 --- a/drivers/video/da8xx-fb.c +++ b/drivers/video/da8xx-fb.c @@ -34,6 +34,7 @@ #include #include #include +#include #include