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N2 drmfix #376

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N2 drmfix #376

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c93e29f
ODROID-N2: drm: Avoid NULL pointer dereference.
Jun 9, 2019
f3f6dd2
ODROID-N2: drm: Fix FBDEV emulation.
Jun 9, 2019
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18 changes: 17 additions & 1 deletion drivers/amlogic/drm/am_meson_fbdev.c
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Original file line number Diff line number Diff line change
Expand Up @@ -83,6 +83,7 @@ static int am_meson_drm_fbdev_create(struct drm_fb_helper *helper,
struct fb_info *fbi;
size_t size;
int ret;
void* vaddr;

bytes_per_pixel = DIV_ROUND_UP(sizes->surface_bpp, 8);

Expand All @@ -101,6 +102,12 @@ static int am_meson_drm_fbdev_create(struct drm_fb_helper *helper,

private->fbdev_bo = &meson_obj->base;

vaddr = ion_map_kernel(client, meson_obj->handle);
if (!vaddr) {
ret = -ENOMEM;
goto err_meson_gem_free_object;
}

fbi = drm_fb_helper_alloc_fbi(helper);
if (IS_ERR(fbi)) {
dev_err(dev->dev, "Failed to create framebuffer info.\n");
Expand All @@ -119,8 +126,17 @@ static int am_meson_drm_fbdev_create(struct drm_fb_helper *helper,
fbi->par = helper;
fbi->flags = FBINFO_FLAG_DEFAULT;
fbi->fbops = &meson_drm_fbdev_ops;
fbi->screen_size = size;
fbi->fix.smem_len = fbi->screen_size;
fbi->screen_buffer = vaddr;
/* Shamelessly leak the physical address to user-space */
fbi->fix.smem_start =
page_to_phys(virt_to_page(fbi->screen_buffer));

fb = helper->fb;
fb->bits_per_pixel = sizes->surface_bpp;
fb->depth = sizes->surface_depth;

drm_fb_helper_fill_fix(fbi, fb->pitches[0], fb->depth);
drm_fb_helper_fill_var(fbi, helper, sizes->fb_width, sizes->fb_height);

Expand Down Expand Up @@ -195,7 +211,7 @@ int am_meson_drm_fbdev_init(struct drm_device *dev)
err_drm_fb_helper_fini:
drm_fb_helper_fini(helper);
err_free:
kfree(fbdev_cma);
kfree(helper);
return ret;
}

Expand Down
5 changes: 5 additions & 0 deletions drivers/amlogic/media/vout/vout_serve/vout_serve.c
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Original file line number Diff line number Diff line change
Expand Up @@ -151,6 +151,11 @@ static enum vmode_e nulldisp_validate_vmode(char *name)
enum vmode_e vmode = VMODE_MAX;
int i;

if (!name) {
printk(KERN_ALERT "nulldisp_validate_vmode: name=NULL\n");
return VMODE_HDMI;
}

for (i = 0; i < ARRAY_SIZE(nulldisp_vinfo); i++) {
if (strcmp(nulldisp_vinfo[i].name, name) == 0) {
vmode = nulldisp_vinfo[i].mode;
Expand Down