Merge "msm: mdss: Add debugfs parameter to disable panic" (0b30cba9) · Commits · e / devices / android_kernel_sony_msm8994

drivers/video/msm/mdss/mdss_debug.c

+111 −0

Original line number	Diff line number	Diff line
		@@ -427,6 +427,114 @@ static const struct file_operations mdss_perf_mode_fops = {
		.write = mdss_debug_perf_mode_write,
		};

		static ssize_t mdss_debug_perf_panic_read(struct file *file,
		char __user buff, size_t count, loff_t ppos)
		{
		struct mdss_data_type *mdata = file->private_data;
		int len = 0;
		char buf[40];

		if (!mdata)
		return -ENODEV;

		if (*ppos)
		return 0; /* the end */

		len = snprintf(buf, sizeof(buf), "%d\n",
		!mdata->has_panic_ctrl);
		if (len < 0)
		return 0;

		if (copy_to_user(buff, buf, len))
		return -EFAULT;

		ppos += len; / increase offset */

		return len;
		}

		static int mdss_debug_set_panic_signal(struct mdss_mdp_pipe *pipe_pool,
		u32 pool_size, struct mdss_data_type *mdata, bool enable)
		{
		int i, cnt = 0;
		struct mdss_mdp_pipe *pipe;

		for (i = 0; i < pool_size; i++) {
		pipe = pipe_pool + i;
		if (pipe && (atomic_read(&pipe->kref.refcount) != 0) &&
		mdss_mdp_panic_signal_supported(mdata, pipe)) {
		mdss_mdp_pipe_panic_signal_ctrl(pipe, enable);
		pr_debug("pnum:%d count:%d img:%dx%d ",
		pipe->num, pipe->play_cnt, pipe->img_width,
		pipe->img_height);
		pr_cont("src[%d,%d,%d,%d] dst[%d,%d,%d,%d]\n",
		pipe->src.x, pipe->src.y, pipe->src.w,
		pipe->src.h, pipe->dst.x, pipe->dst.y,
		pipe->dst.w, pipe->dst.h);
		cnt++;
		} else if (pipe) {
		pr_debug("Inactive pipe num:%d supported:%d\n",
		atomic_read(&pipe->kref.refcount),
		mdss_mdp_panic_signal_supported(mdata, pipe));
		}
		}
		return cnt;
		}

		static void mdss_debug_set_panic_state(struct mdss_data_type *mdata,
		bool enable)
		{
		pr_debug("VIG:\n");
		if (!mdss_debug_set_panic_signal(mdata->vig_pipes, mdata->nvig_pipes,
		mdata, enable))
		pr_debug("no active pipes found\n");
		pr_debug("RGB:\n");
		if (!mdss_debug_set_panic_signal(mdata->rgb_pipes, mdata->nrgb_pipes,
		mdata, enable))
		pr_debug("no active pipes found\n");
		pr_debug("DMA:\n");
		if (!mdss_debug_set_panic_signal(mdata->vig_pipes, mdata->ndma_pipes,
		mdata, enable))
		pr_debug("no active pipes found\n");
		}

		static ssize_t mdss_debug_perf_panic_write(struct file *file,
		const char __user user_buf, size_t count, loff_t ppos)
		{
		struct mdss_data_type *mdata = file->private_data;
		int disable_panic;
		char buf[10];

		if (!mdata)
		return -EFAULT;

		if (copy_from_user(buf, user_buf, count))
		return -EFAULT;

		if (sscanf(buf, "%d", &disable_panic) != 1)
		return -EFAULT;

		if (disable_panic) {
		/* Disable panic signal for all active pipes */
		pr_debug("Disabling panic:\n");
		mdss_debug_set_panic_state(mdata, false);
		mdata->has_panic_ctrl = false;
		} else {
		/* Enable panic signal for all active pipes */
		pr_debug("Enabling panic:\n");
		mdata->has_panic_ctrl = true;
		mdss_debug_set_panic_state(mdata, true);
		}

		return count;
		}

		static const struct file_operations mdss_perf_panic_enable = {
		.open = simple_open,
		.read = mdss_debug_perf_panic_read,
		.write = mdss_debug_perf_panic_write,
		};

		static int mdss_debugfs_cleanup(struct mdss_debug_data *mdd)
		{
		struct mdss_debug_base base, tmp;
		@@ -456,6 +564,9 @@ static int mdss_debugfs_perf_init(struct mdss_debug_data *mdd,
		debugfs_create_u64("min_bus_vote", 0644, mdd->perf,
		(u64 *)&mdata->perf_tune.min_bus_vote);

		debugfs_create_file("disable_panic", 0644, mdd->perf,
		(struct mdss_data_type *)mdata, &mdss_perf_panic_enable);

		debugfs_create_file("ab_factor", 0644, mdd->perf,
		&mdata->ab_factor, &mdss_factor_fops);