From: Jeonghee Kim <jhhhh.kim@samsung.com>
Date: Tue, 26 Jun 2018 02:23:31 +0000 (+0900)
Subject: [COMMON] media: mfc: check low memory device
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=45d5b16a087431de0b75f2fb2cbe9680aaaa5508;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

[COMMON] media: mfc: check low memory device

Returns error if the total memory is less than 1.5GB and DPB size is too big
to pass android.security.cts.StagefrightTest#testBug_37930177

Change-Id: I62f82f73ea49a490317e54faf80adf467474be70
Signed-off-by: Jeonghee Kim <jhhhh.kim@samsung.com>
---

diff --git a/drivers/media/platform/exynos/mfc/s5p_mfc_common.h b/drivers/media/platform/exynos/mfc/s5p_mfc_common.h
index ef3d98d7909d..0a919066cb18 100644
--- a/drivers/media/platform/exynos/mfc/s5p_mfc_common.h
+++ b/drivers/media/platform/exynos/mfc/s5p_mfc_common.h
@@ -185,4 +185,8 @@
 
 #define MFC_FEATURE_SUPPORT(dev, f)	((f).support && ((dev)->fw.date >= (f).version))
 
+/* Low memory check */
+#define IS_LOW_MEM			(totalram_pages <= ((SZ_1G + SZ_512M) >> PAGE_SHIFT))
+#define SZ_600M				(6 * 1024 * 1024)
+
 #endif /* __S5P_MFC_COMMON_H */
diff --git a/drivers/media/platform/exynos/mfc/s5p_mfc_debugfs.c b/drivers/media/platform/exynos/mfc/s5p_mfc_debugfs.c
index 55e17ff0710d..61f80a6bd5c8 100644
--- a/drivers/media/platform/exynos/mfc/s5p_mfc_debugfs.c
+++ b/drivers/media/platform/exynos/mfc/s5p_mfc_debugfs.c
@@ -70,6 +70,7 @@ static int mfc_info_show(struct seq_file *s, void *unused)
 			dev->pdata->support_10bit ? "supported" : "not supported",
 			dev->pdata->support_422 ? "supported" : "not supported",
 			dev->pdata->support_rgb ? "supported" : "not supported");
+	seq_printf(s, "[LOWMEM] is_low_mem: %d\n", IS_LOW_MEM);
 	if (dev->nal_q_handle)
 		seq_printf(s, "[NAL-Q] state: %d\n", dev->nal_q_handle->nal_q_state);
 
diff --git a/drivers/media/platform/exynos/mfc/s5p_mfc_dec.c b/drivers/media/platform/exynos/mfc/s5p_mfc_dec.c
index 8ea96d3dc666..a28c70faff01 100644
--- a/drivers/media/platform/exynos/mfc/s5p_mfc_dec.c
+++ b/drivers/media/platform/exynos/mfc/s5p_mfc_dec.c
@@ -314,6 +314,25 @@ static int vidioc_g_fmt_vid_cap_mplane(struct file *file, void *priv,
 		   rectangle. */
 		s5p_mfc_dec_calc_dpb_size(ctx);
 
+		if (IS_LOW_MEM) {
+			unsigned int dpb_size;
+			/*
+			 * If total memory requirement is too big for this device,
+			 * then it returns error.
+			 * DPB size : Total plane size * the number of DPBs
+			 * 5: the number of extra DPBs
+			 * 3: the number of DPBs for Android framework
+			 * 600MB: being used to return an error,
+			 * when 8K resolution video clip is being tried to be decoded
+			 */
+			dpb_size = (ctx->raw_buf.total_plane_size * (ctx->dpb_count + 5 + 3));
+			if (dpb_size > SZ_600M) {
+				mfc_info_ctx("required memory size is too big (%dx%d, dpb: %d)\n",
+						ctx->img_width, ctx->img_height, ctx->dpb_count);
+				return -EINVAL;
+			}
+		}
+
 		pix_fmt_mp->width = ctx->img_width;
 		pix_fmt_mp->height = ctx->img_height;
 		pix_fmt_mp->num_planes = ctx->dst_fmt->mem_planes;