1 files changed, 69 insertions, 225 deletions

diff --git a/drivers/gpu/drm/msm/dp/dp_debug.c b/drivers/gpu/drm/msm/dp/dp_debug.c
index 2f6247e80e9d..da4323556ef3 100644
--- a/drivers/gpu/drm/msm/dp/dp_debug.c
+++ b/drivers/gpu/drm/msm/dp/dp_debug.c
@@ -24,240 +24,108 @@ struct dp_debug_private {
 	struct dp_usbpd *usbpd;
 	struct dp_link *link;
 	struct dp_panel *panel;
-	struct drm_connector **connector;
+	struct drm_connector *connector;
 	struct device *dev;
 	struct drm_device *drm_dev;
 
 	struct dp_debug dp_debug;
 };
 
-static int dp_debug_check_buffer_overflow(int rc, int *max_size, int *len)
-{
-	if (rc >= *max_size) {
-		DRM_ERROR("buffer overflow\n");
-		return -EINVAL;
-	}
-	*len += rc;
-	*max_size = SZ_4K - *len;
-
-	return 0;
-}
-
-static ssize_t dp_debug_read_info(struct file *file, char __user *user_buff,
-		size_t count, loff_t *ppos)
+static int dp_debug_show(struct seq_file *seq, void *p)
 {
-	struct dp_debug_private *debug = file->private_data;
-	char *buf;
-	u32 len = 0, rc = 0;
+	struct dp_debug_private *debug = seq->private;
 	u64 lclk = 0;
-	u32 max_size = SZ_4K;
 	u32 link_params_rate;
-	struct drm_display_mode *drm_mode;
+	const struct drm_display_mode *drm_mode;
 
 	if (!debug)
 		return -ENODEV;
 
-	if (*ppos)
-		return 0;
-
-	buf = kzalloc(SZ_4K, GFP_KERNEL);
-	if (!buf)
-		return -ENOMEM;
-
 	drm_mode = &debug->panel->dp_mode.drm_mode;
 
-	rc = snprintf(buf + len, max_size, "\tname = %s\n", DEBUG_NAME);
-	if (dp_debug_check_buffer_overflow(rc, &max_size, &len))
-		goto error;
-
-	rc = snprintf(buf + len, max_size,
-			"\tdp_panel\n\t\tmax_pclk_khz = %d\n",
+	seq_printf(seq, "\tname = %s\n", DEBUG_NAME);
+	seq_printf(seq, "\tdp_panel\n\t\tmax_pclk_khz = %d\n",
 			debug->panel->max_pclk_khz);
-	if (dp_debug_check_buffer_overflow(rc, &max_size, &len))
-		goto error;
-
-	rc = snprintf(buf + len, max_size,
-			"\tdrm_dp_link\n\t\trate = %u\n",
+	seq_printf(seq, "\tdrm_dp_link\n\t\trate = %u\n",
 			debug->panel->link_info.rate);
-	if (dp_debug_check_buffer_overflow(rc, &max_size, &len))
-		goto error;
-
-	rc = snprintf(buf + len, max_size,
-			 "\t\tnum_lanes = %u\n",
+	seq_printf(seq, "\t\tnum_lanes = %u\n",
 			debug->panel->link_info.num_lanes);
-	if (dp_debug_check_buffer_overflow(rc, &max_size, &len))
-		goto error;
-
-	rc = snprintf(buf + len, max_size,
-			"\t\tcapabilities = %lu\n",
+	seq_printf(seq, "\t\tcapabilities = %lu\n",
 			debug->panel->link_info.capabilities);
-	if (dp_debug_check_buffer_overflow(rc, &max_size, &len))
-		goto error;
-
-	rc = snprintf(buf + len, max_size,
-			"\tdp_panel_info:\n\t\tactive = %dx%d\n",
+	seq_printf(seq, "\tdp_panel_info:\n\t\tactive = %dx%d\n",
 			drm_mode->hdisplay,
 			drm_mode->vdisplay);
-	if (dp_debug_check_buffer_overflow(rc, &max_size, &len))
-		goto error;
-
-	rc = snprintf(buf + len, max_size,
-			"\t\tback_porch = %dx%d\n",
+	seq_printf(seq, "\t\tback_porch = %dx%d\n",
 			drm_mode->htotal - drm_mode->hsync_end,
 			drm_mode->vtotal - drm_mode->vsync_end);
-	if (dp_debug_check_buffer_overflow(rc, &max_size, &len))
-		goto error;
-
-	rc = snprintf(buf + len, max_size,
-			"\t\tfront_porch = %dx%d\n",
+	seq_printf(seq, "\t\tfront_porch = %dx%d\n",
 			drm_mode->hsync_start - drm_mode->hdisplay,
 			drm_mode->vsync_start - drm_mode->vdisplay);
-	if (dp_debug_check_buffer_overflow(rc, &max_size, &len))
-		goto error;
-
-	rc = snprintf(buf + len, max_size,
-			"\t\tsync_width = %dx%d\n",
+	seq_printf(seq, "\t\tsync_width = %dx%d\n",
 			drm_mode->hsync_end - drm_mode->hsync_start,
 			drm_mode->vsync_end - drm_mode->vsync_start);
-	if (dp_debug_check_buffer_overflow(rc, &max_size, &len))
-		goto error;
-
-	rc = snprintf(buf + len, max_size,
-			"\t\tactive_low = %dx%d\n",
+	seq_printf(seq, "\t\tactive_low = %dx%d\n",
 			debug->panel->dp_mode.h_active_low,
 			debug->panel->dp_mode.v_active_low);
-	if (dp_debug_check_buffer_overflow(rc, &max_size, &len))
-		goto error;
-
-	rc = snprintf(buf + len, max_size,
-			"\t\th_skew = %d\n",
+	seq_printf(seq, "\t\th_skew = %d\n",
 			drm_mode->hskew);
-	if (dp_debug_check_buffer_overflow(rc, &max_size, &len))
-		goto error;
-
-	rc = snprintf(buf + len, max_size,
-			"\t\trefresh rate = %d\n",
+	seq_printf(seq, "\t\trefresh rate = %d\n",
 			drm_mode_vrefresh(drm_mode));
-	if (dp_debug_check_buffer_overflow(rc, &max_size, &len))
-		goto error;
-
-	rc = snprintf(buf + len, max_size,
-			"\t\tpixel clock khz = %d\n",
+	seq_printf(seq, "\t\tpixel clock khz = %d\n",
 			drm_mode->clock);
-	if (dp_debug_check_buffer_overflow(rc, &max_size, &len))
-		goto error;
-
-	rc = snprintf(buf + len, max_size,
-			"\t\tbpp = %d\n",
+	seq_printf(seq, "\t\tbpp = %d\n",
 			debug->panel->dp_mode.bpp);
-	if (dp_debug_check_buffer_overflow(rc, &max_size, &len))
-		goto error;
 
 	/* Link Information */
-	rc = snprintf(buf + len, max_size,
-			"\tdp_link:\n\t\ttest_requested = %d\n",
+	seq_printf(seq, "\tdp_link:\n\t\ttest_requested = %d\n",
 			debug->link->sink_request);
-	if (dp_debug_check_buffer_overflow(rc, &max_size, &len))
-		goto error;
-
-	rc = snprintf(buf + len, max_size,
-			"\t\tnum_lanes = %d\n",
+	seq_printf(seq, "\t\tnum_lanes = %d\n",
 			debug->link->link_params.num_lanes);
-	if (dp_debug_check_buffer_overflow(rc, &max_size, &len))
-		goto error;
-
 	link_params_rate = debug->link->link_params.rate;
-	rc = snprintf(buf + len, max_size,
-			"\t\tbw_code = %d\n",
+	seq_printf(seq, "\t\tbw_code = %d\n",
 			drm_dp_link_rate_to_bw_code(link_params_rate));
-	if (dp_debug_check_buffer_overflow(rc, &max_size, &len))
-		goto error;
-
 	lclk = debug->link->link_params.rate * 1000;
-	rc = snprintf(buf + len, max_size,
-			"\t\tlclk = %lld\n", lclk);
-	if (dp_debug_check_buffer_overflow(rc, &max_size, &len))
-		goto error;
-
-	rc = snprintf(buf + len, max_size,
-			"\t\tv_level = %d\n",
+	seq_printf(seq, "\t\tlclk = %lld\n", lclk);
+	seq_printf(seq, "\t\tv_level = %d\n",
 			debug->link->phy_params.v_level);
-	if (dp_debug_check_buffer_overflow(rc, &max_size, &len))
-		goto error;
-
-	rc = snprintf(buf + len, max_size,
-			"\t\tp_level = %d\n",
+	seq_printf(seq, "\t\tp_level = %d\n",
 			debug->link->phy_params.p_level);
-	if (dp_debug_check_buffer_overflow(rc, &max_size, &len))
-		goto error;
-
-	if (copy_to_user(user_buff, buf, len))
-		goto error;
-
-	*ppos += len;
 
-	kfree(buf);
-	return len;
- error:
-	kfree(buf);
-	return -EINVAL;
+	return 0;
 }
+DEFINE_SHOW_ATTRIBUTE(dp_debug);
 
 static int dp_test_data_show(struct seq_file *m, void *data)
 {
-	struct drm_device *dev;
-	struct dp_debug_private *debug;
-	struct drm_connector *connector;
-	struct drm_connector_list_iter conn_iter;
+	const struct dp_debug_private *debug = m->private;
+	const struct drm_connector *connector = debug->connector;
 	u32 bpc;
 
-	debug = m->private;
-	dev = debug->drm_dev;
-	drm_connector_list_iter_begin(dev, &conn_iter);
-	drm_for_each_connector_iter(connector, &conn_iter) {
-
-		if (connector->connector_type !=
-			DRM_MODE_CONNECTOR_DisplayPort)
-			continue;
-
-		if (connector->status == connector_status_connected) {
-			bpc = debug->link->test_video.test_bit_depth;
-			seq_printf(m, "hdisplay: %d\n",
-					debug->link->test_video.test_h_width);
-			seq_printf(m, "vdisplay: %d\n",
-					debug->link->test_video.test_v_height);
-			seq_printf(m, "bpc: %u\n",
-					dp_link_bit_depth_to_bpc(bpc));
-		} else
-			seq_puts(m, "0");
+	if (connector->status == connector_status_connected) {
+		bpc = debug->link->test_video.test_bit_depth;
+		seq_printf(m, "hdisplay: %d\n",
+				debug->link->test_video.test_h_width);
+		seq_printf(m, "vdisplay: %d\n",
+				debug->link->test_video.test_v_height);
+		seq_printf(m, "bpc: %u\n",
+				dp_link_bit_depth_to_bpc(bpc));
+	} else {
+		seq_puts(m, "0");
 	}
 
-	drm_connector_list_iter_end(&conn_iter);
-
 	return 0;
 }
 DEFINE_SHOW_ATTRIBUTE(dp_test_data);
 
 static int dp_test_type_show(struct seq_file *m, void *data)
 {
-	struct dp_debug_private *debug = m->private;
-	struct drm_device *dev = debug->drm_dev;
-	struct drm_connector *connector;
-	struct drm_connector_list_iter conn_iter;
+	const struct dp_debug_private *debug = m->private;
+	const struct drm_connector *connector = debug->connector;
 
-	drm_connector_list_iter_begin(dev, &conn_iter);
-	drm_for_each_connector_iter(connector, &conn_iter) {
-
-		if (connector->connector_type !=
-			DRM_MODE_CONNECTOR_DisplayPort)
-			continue;
-
-		if (connector->status == connector_status_connected)
-			seq_printf(m, "%02x", DP_TEST_LINK_VIDEO_PATTERN);
-		else
-			seq_puts(m, "0");
-	}
-	drm_connector_list_iter_end(&conn_iter);
+	if (connector->status == connector_status_connected)
+		seq_printf(m, "%02x", DP_TEST_LINK_VIDEO_PATTERN);
+	else
+		seq_puts(m, "0");
 
 	return 0;
 }
@@ -269,14 +137,12 @@ static ssize_t dp_test_active_write(struct file *file,
 {
 	char *input_buffer;
 	int status = 0;
-	struct dp_debug_private *debug;
-	struct drm_device *dev;
-	struct drm_connector *connector;
-	struct drm_connector_list_iter conn_iter;
+	const struct dp_debug_private *debug;
+	const struct drm_connector *connector;
 	int val = 0;
 
 	debug = ((struct seq_file *)file->private_data)->private;
-	dev = debug->drm_dev;
+	connector = debug->connector;
 
 	if (len == 0)
 		return 0;
@@ -287,30 +153,22 @@ static ssize_t dp_test_active_write(struct file *file,
 
 	DRM_DEBUG_DRIVER("Copied %d bytes from user\n", (unsigned int)len);
 
-	drm_connector_list_iter_begin(dev, &conn_iter);
-	drm_for_each_connector_iter(connector, &conn_iter) {
-		if (connector->connector_type !=
-			DRM_MODE_CONNECTOR_DisplayPort)
-			continue;
-
-		if (connector->status == connector_status_connected) {
-			status = kstrtoint(input_buffer, 10, &val);
-			if (status < 0)
-				break;
-			DRM_DEBUG_DRIVER("Got %d for test active\n", val);
-			/* To prevent erroneous activation of the compliance
-			 * testing code, only accept an actual value of 1 here
-			 */
-			if (val == 1)
-				debug->panel->video_test = true;
-			else
-				debug->panel->video_test = false;
+	if (connector->status == connector_status_connected) {
+		status = kstrtoint(input_buffer, 10, &val);
+		if (status < 0) {
+			kfree(input_buffer);
+			return status;
 		}
+		DRM_DEBUG_DRIVER("Got %d for test active\n", val);
+		/* To prevent erroneous activation of the compliance
+		 * testing code, only accept an actual value of 1 here
+		 */
+		if (val == 1)
+			debug->panel->video_test = true;
+		else
+			debug->panel->video_test = false;
 	}
-	drm_connector_list_iter_end(&conn_iter);
 	kfree(input_buffer);
-	if (status < 0)
-		return status;
 
 	*offp += len;
 	return len;
@@ -319,25 +177,16 @@ static ssize_t dp_test_active_write(struct file *file,
 static int dp_test_active_show(struct seq_file *m, void *data)
 {
 	struct dp_debug_private *debug = m->private;
-	struct drm_device *dev = debug->drm_dev;
-	struct drm_connector *connector;
-	struct drm_connector_list_iter conn_iter;
-
-	drm_connector_list_iter_begin(dev, &conn_iter);
-	drm_for_each_connector_iter(connector, &conn_iter) {
-		if (connector->connector_type !=
-			DRM_MODE_CONNECTOR_DisplayPort)
-			continue;
-
-		if (connector->status == connector_status_connected) {
-			if (debug->panel->video_test)
-				seq_puts(m, "1");
-			else
-				seq_puts(m, "0");
-		} else
+	struct drm_connector *connector = debug->connector;
+
+	if (connector->status == connector_status_connected) {
+		if (debug->panel->video_test)
+			seq_puts(m, "1");
+		else
 			seq_puts(m, "0");
+	} else {
+		seq_puts(m, "0");
 	}
-	drm_connector_list_iter_end(&conn_iter);
 
 	return 0;
 }
@@ -349,11 +198,6 @@ static int dp_test_active_open(struct inode *inode,
 			inode->i_private);
 }
 
-static const struct file_operations dp_debug_fops = {
-	.open = simple_open,
-	.read = dp_debug_read_info,
-};
-
 static const struct file_operations test_active_fops = {
 	.owner = THIS_MODULE,
 	.open = dp_test_active_open,
@@ -391,7 +235,7 @@ static int dp_debug_init(struct dp_debug *dp_debug, struct drm_minor *minor)
 
 struct dp_debug *dp_debug_get(struct device *dev, struct dp_panel *panel,
 		struct dp_usbpd *usbpd, struct dp_link *link,
-		struct drm_connector **connector, struct drm_minor *minor)
+		struct drm_connector *connector, struct drm_minor *minor)
 {
 	int rc = 0;
 	struct dp_debug_private *debug;