linux-kernel - [PATCH 1/2] drm/mipi-dsi: add mipi_dsi_shutdown_peripheral

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20260109154157.33592-2-avinal.xlvii@gmail.com>
Date: Fri,  9 Jan 2026 21:11:56 +0530
From: Avinal Kumar <avinal.xlvii@...il.com>
To: dri-devel@...ts.freedesktop.org
Cc: linux-kernel@...r.kernel.org,
	neil.armstrong@...aro.org,
	maarten.lankhorst@...ux.intel.com,
	mripard@...nel.org,
	tzimmermann@...e.de,
	airlied@...il.com,
	simona@...ll.ch
Subject: [PATCH 1/2] drm/mipi-dsi: add mipi_dsi_shutdown_peripheral_multi

Add mipi_dsi_shutdown_peripheral_multi function and mark
mipi_dsi_shutdown_peripheral fucntion as deprecated.

Signed-off-by: Avinal Kumar <avinal.xlvii@...il.com>
---
 drivers/gpu/drm/drm_mipi_dsi.c | 28 ++++++++++++++++++++++++++++
 include/drm/drm_mipi_dsi.h     |  1 +
 2 files changed, 29 insertions(+)

diff --git a/drivers/gpu/drm/drm_mipi_dsi.c b/drivers/gpu/drm/drm_mipi_dsi.c
index a712e177b350..2fed50172a44 100644
--- a/drivers/gpu/drm/drm_mipi_dsi.c
+++ b/drivers/gpu/drm/drm_mipi_dsi.c
@@ -587,6 +587,9 @@ EXPORT_SYMBOL(mipi_dsi_create_packet);
  * mipi_dsi_shutdown_peripheral() - sends a Shutdown Peripheral command
  * @dsi: DSI peripheral device
  *
+ * This function is deprecated. Use mipi_dsi_shutdown_peripheral_multi()
+ * instead.
+ *
  * Return: 0 on success or a negative error code on failure.
  */
 int mipi_dsi_shutdown_peripheral(struct mipi_dsi_device *dsi)
@@ -1980,6 +1983,31 @@ void mipi_dsi_dcs_set_tear_scanline_multi(struct mipi_dsi_multi_context *ctx,
 }
 EXPORT_SYMBOL(mipi_dsi_dcs_set_tear_scanline_multi);
 
+/**
+ * mipi_dsi_shutdown_peripheral_multi() - sends a Shutdown Peripheral command
+ * @ctx: Context for multiple DSI transactions
+ *
+ * Like mipi_dsi_shutdown_peripheral() but deals with errors in a way that
+ * makes it convienient to make seeral calls in a row.
+ */
+void mipi_dsi_shutdown_peripheral_multi(struct mipi_dsi_multi_context *ctx)
+{
+	struct mipi_dsi_device *dsi = ctx->dsi;
+	struct device *dev = &dsi->dev;
+	int ret;
+
+	if (ctx->accum_err)
+		return;
+
+	ret = mipi_dsi_shutdown_peripheral(dsi);
+	if (ret < 0) {
+		ctx->accum_err = ret;
+		dev_err(dev, "Failed to shutdown peripheral: %d\n",
+			ctx->accum_err);
+	}
+}
+EXPORT_SYMBOL(mipi_dsi_shutdown_peripheral_multi);
+
 static int mipi_dsi_drv_probe(struct device *dev)
 {
 	struct mipi_dsi_driver *drv = to_mipi_dsi_driver(dev->driver);
diff --git a/include/drm/drm_mipi_dsi.h b/include/drm/drm_mipi_dsi.h
index 3aba7b380c8d..19ccdf5eeb5f 100644
--- a/include/drm/drm_mipi_dsi.h
+++ b/include/drm/drm_mipi_dsi.h
@@ -389,6 +389,7 @@ void mipi_dsi_dcs_set_page_address_multi(struct mipi_dsi_multi_context *ctx,
 void mipi_dsi_dcs_set_tear_scanline_multi(struct mipi_dsi_multi_context *ctx,
 					  u16 scanline);
 void mipi_dsi_dcs_set_tear_off_multi(struct mipi_dsi_multi_context *ctx);
+void mipi_dsi_shutdown_peripheral_multi(struct mipi_dsi_multi_context *ctx);
 
 /**
  * mipi_dsi_generic_write_seq_multi - transmit data using a generic write packet
-- 
2.52.0