4.19-stable patches

added patches:
	drm-bridge-analogix_dp-properly-handle-zero-sized-aux-transactions.patch
	drm-mgag200-set-ddc-timeout-in-milliseconds.patch

diff --git a/queue-4.19/drm-bridge-analogix_dp-properly-handle-zero-sized-aux-transactions.patch b/queue-4.19/drm-bridge-analogix_dp-properly-handle-zero-sized-aux-transactions.patch
new file mode 100644 (file)
index 0000000..ab99730
--- /dev/null
+++ b/queue-4.19/drm-bridge-analogix_dp-properly-handle-zero-sized-aux-transactions.patch
@@ -0,0 +1,58 @@
+From e82290a2e0e8ec5e836ecad1ca025021b3855c2d Mon Sep 17 00:00:00 2001
+From: Lucas Stach <l.stach@pengutronix.de>
+Date: Mon, 18 Mar 2024 21:39:23 +0100
+Subject: drm/bridge: analogix_dp: properly handle zero sized AUX transactions
+
+From: Lucas Stach <l.stach@pengutronix.de>
+
+commit e82290a2e0e8ec5e836ecad1ca025021b3855c2d upstream.
+
+Address only transactions without any data are valid and should not
+be flagged as short transactions. Simply return the message size when
+no transaction errors occured.
+
+CC: stable@vger.kernel.org
+Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
+Reviewed-by: Robert Foss <rfoss@kernel.org>
+Signed-off-by: Robert Foss <rfoss@kernel.org>
+Link: https://patchwork.freedesktop.org/patch/msgid/20240318203925.2837689-1-l.stach@pengutronix.de
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+---
+ drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c |    5 +----
+ 1 file changed, 1 insertion(+), 4 deletions(-)
+
+--- a/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c
++++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c
+@@ -1109,7 +1109,6 @@ ssize_t analogix_dp_transfer(struct anal
+       u32 status_reg;
+       u8 *buffer = msg->buffer;
+       unsigned int i;
+-      int num_transferred = 0;
+       int ret;
+ 
+       /* Buffer size of AUX CH is 16 bytes */
+@@ -1161,7 +1160,6 @@ ssize_t analogix_dp_transfer(struct anal
+                       reg = buffer[i];
+                       writel(reg, dp->reg_base + ANALOGIX_DP_BUF_DATA_0 +
+                              4 * i);
+-                      num_transferred++;
+               }
+       }
+ 
+@@ -1209,7 +1207,6 @@ ssize_t analogix_dp_transfer(struct anal
+                       reg = readl(dp->reg_base + ANALOGIX_DP_BUF_DATA_0 +
+                                   4 * i);
+                       buffer[i] = (unsigned char)reg;
+-                      num_transferred++;
+               }
+       }
+ 
+@@ -1226,7 +1223,7 @@ ssize_t analogix_dp_transfer(struct anal
+                (msg->request & ~DP_AUX_I2C_MOT) == DP_AUX_NATIVE_READ)
+               msg->reply = DP_AUX_NATIVE_REPLY_ACK;
+ 
+-      return num_transferred > 0 ? num_transferred : -EBUSY;
++      return msg->size;
+ 
+ aux_error:
+       /* if aux err happen, reset aux */

diff --git a/queue-4.19/drm-mgag200-set-ddc-timeout-in-milliseconds.patch b/queue-4.19/drm-mgag200-set-ddc-timeout-in-milliseconds.patch
new file mode 100644 (file)
index 0000000..30c701d
--- /dev/null
+++ b/queue-4.19/drm-mgag200-set-ddc-timeout-in-milliseconds.patch
@@ -0,0 +1,41 @@
+From ecde5db1598aecab54cc392282c15114f526f05f Mon Sep 17 00:00:00 2001
+From: Thomas Zimmermann <tzimmermann@suse.de>
+Date: Mon, 13 May 2024 14:51:06 +0200
+Subject: drm/mgag200: Set DDC timeout in milliseconds
+
+From: Thomas Zimmermann <tzimmermann@suse.de>
+
+commit ecde5db1598aecab54cc392282c15114f526f05f upstream.
+
+Compute the i2c timeout in jiffies from a value in milliseconds. The
+original values of 2 jiffies equals 2 milliseconds if HZ has been
+configured to a value of 1000. This corresponds to 2.2 milliseconds
+used by most other DRM drivers. Update mgag200 accordingly.
+
+Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
+Reviewed-by: Jocelyn Falempe <jfalempe@redhat.com>
+Fixes: 414c45310625 ("mgag200: initial g200se driver (v2)")
+Cc: Dave Airlie <airlied@redhat.com>
+Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
+Cc: Maxime Ripard <mripard@kernel.org>
+Cc: Thomas Zimmermann <tzimmermann@suse.de>
+Cc: Jocelyn Falempe <jfalempe@redhat.com>
+Cc: dri-devel@lists.freedesktop.org
+Cc: <stable@vger.kernel.org> # v3.5+
+Link: https://patchwork.freedesktop.org/patch/msgid/20240513125620.6337-2-tzimmermann@suse.de
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+---
+ drivers/gpu/drm/mgag200/mgag200_i2c.c |    2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+--- a/drivers/gpu/drm/mgag200/mgag200_i2c.c
++++ b/drivers/gpu/drm/mgag200/mgag200_i2c.c
+@@ -133,7 +133,7 @@ struct mga_i2c_chan *mgag200_i2c_create(
+       i2c->adapter.algo_data = &i2c->bit;
+ 
+       i2c->bit.udelay = 10;
+-      i2c->bit.timeout = 2;
++      i2c->bit.timeout = usecs_to_jiffies(2200);
+       i2c->bit.data = i2c;
+       i2c->bit.setsda         = mga_gpio_setsda;
+       i2c->bit.setscl         = mga_gpio_setscl;

diff --git a/queue-4.19/series b/queue-4.19/series
index 13bfb535b2a918952677102883b81129ce503dfc..3721221cda99b9482441e0d11c129efe26768926 100644 (file)
--- a/queue-4.19/series
+++ b/queue-4.19/series
@@ -183,3 +183,5 @@ power-supply-axp288_charger-fix-constant_charge_voltage-writes.patch
 power-supply-axp288_charger-round-constant_charge_voltage-writes-down.patch
 tracing-fix-overflow-in-get_free_elt.patch
 x86-mtrr-check-if-fixed-mtrrs-exist-before-saving-them.patch
+drm-bridge-analogix_dp-properly-handle-zero-sized-aux-transactions.patch
+drm-mgag200-set-ddc-timeout-in-milliseconds.patch