xiaomi-sm8450/android_kernel_xiaomi_sm8450
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drm/msm: add support for "stolen" mem

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Add support to use the VRAM carveout (if specified in dtb) for fbdev
scanout buffer.  This allows drm/msm to take over a bootloader splash-
screen, and avoids corruption on screen that results if the kernel uses
memory that is still being scanned out for itself.

Signed-off-by: Rob Clark <robdclark@gmail.com>
This commit is contained in:
Rob Clark
2015-03-03 15:04:25 -05:00
parent 5bf9c0b614
commit 072f1f9168
4 changed files with 66 additions and 11 deletions
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3
drivers/gpu/drm/msm/msm_fbdev.c
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@@ -110,7 +110,8 @@ static int msm_fbdev_create(struct drm_fb_helper *helper,
size = mode_cmd.pitches[0] * mode_cmd.height;
DBG("allocating %d bytes for fb %d", size, dev->primary->index);
mutex_lock(&dev->struct_mutex);
fbdev->bo = msm_gem_new(dev, size, MSM_BO_SCANOUT | MSM_BO_WC);
fbdev->bo = msm_gem_new(dev, size, MSM_BO_SCANOUT |
MSM_BO_WC | MSM_BO_STOLEN);
mutex_unlock(&dev->struct_mutex);
if (IS_ERR(fbdev->bo)) {
ret = PTR_ERR(fbdev->bo);