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Koen Kooi
9bc77dff5f
Regenerate all beaglebone patches and add one vfs tracer patch for powertop Signed-off-by: Koen Kooi <koen@dominion.thruhere.net> Signed-off-by: Denys Dmytriyenko <denys@ti.com>
60 lines
2.1 KiB
Diff
60 lines
2.1 KiB
Diff
From c9201ef3a2d12a49b5070620a204f66eef5017e0 Mon Sep 17 00:00:00 2001
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From: Aditya Nellutla <aditya.n@ti.com>
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Date: Thu, 29 Mar 2012 15:45:39 +0530
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Subject: [PATCH 62/79] da8xx-fb: Rounding FB size to satisfy SGX buffer
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requirements
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In the real time use-case when SGX is used for rendering to FB buffers it has been
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observed that, the available memory from framebuffer driver is not sufficient for
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SGX under certain cases (like 16-bit WVGA resolution). SGX requires 2 swap buffers
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with each of the buffers aligned to lcm(line_length, PAGE_SIZE).
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Inorder to satisfy this requirement, we have two options,
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- Increase number of FB buffers (LCD_NUM_BUFFERS) to 3. This is not
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recommended as we end up wasting huge memory in most of the cases.
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- Align FB buffers to lcm(line_length, PAGE_SIZE).This ensures framebuffer
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size is increased to satisfy SGX requirements keeping alignment intact.
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This patch makes sure that FB allocates buffers aligned to above formula.
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Signed-off-by: Aditya Nellutla <aditya.n@ti.com>
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---
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drivers/video/da8xx-fb.c | 5 ++++-
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1 file changed, 4 insertions(+), 1 deletion(-)
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diff --git a/drivers/video/da8xx-fb.c b/drivers/video/da8xx-fb.c
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index 86b19ac..9aaca5d 100644
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--- a/drivers/video/da8xx-fb.c
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+++ b/drivers/video/da8xx-fb.c
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@@ -34,6 +34,7 @@
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#include <linux/slab.h>
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#include <linux/delay.h>
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#include <linux/pm_runtime.h>
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+#include <linux/lcm.h>
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#include <video/da8xx-fb.h>
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#include <asm/mach-types.h>
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@@ -1263,6 +1264,7 @@ static int __devinit fb_probe(struct platform_device *device)
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struct da8xx_fb_par *par;
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resource_size_t len;
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int ret, i;
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+ unsigned long ulcm;
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if (fb_pdata == NULL) {
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dev_err(&device->dev, "Can not get platform data\n");
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@@ -1362,7 +1364,8 @@ static int __devinit fb_probe(struct platform_device *device)
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/* allocate frame buffer */
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par->vram_size = lcdc_info->width * lcdc_info->height * lcd_cfg->bpp;
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- par->vram_size = PAGE_ALIGN(par->vram_size/8);
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+ ulcm = lcm((lcdc_info->width * lcd_cfg->bpp)/8, PAGE_SIZE);
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+ par->vram_size = roundup(par->vram_size/8, ulcm);
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par->vram_size = par->vram_size * LCD_NUM_BUFFERS;
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par->vram_virt = dma_alloc_coherent(NULL,
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--
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1.7.10
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