drm/amd/display: Try RGB before YCbCr 4:4:4 in stream validationgrafted

amdgpu_dm_create_validate_stream_for_sink() walks encoding_order[] and
uses the first encoding that validates. YCbCr 4:4:4 is listed before
RGB, so an HDMI sink that advertises 4:4:4 gets YCbCr 4:4:4 whenever the
"color format" property is left at AUTO, even though RGB fits the same
link.

That contradicts the documented AUTO behaviour for HDMI in enum
drm_connector_color_format (RGB, falling back to YCbCr 4:2:0 only when
the bandwidth is not available or the mode is 4:2:0-only), which the
amdgpu implementation of the property also describes. It also leaves
the "Broadcast RGB" property without effect on such sinks, since the
quantization range it selects only applies to RGB output.

Try RGB first. The mask still holds every encoding the sink supports,
so a mode that cannot carry RGB falls back exactly as before.

For reference, v7.2 picked RGB here unless YCbCr 4:4:4 was forced
through debugfs, while earlier kernels picked YCbCr 4:4:4 for any HDMI
sink that advertised it.

Fixes: 0b0ff65d3ca1 ("drm/amd/display: Refactor stream validation")
Suggested-by: Adolfo Rodrigues <adolfotregosa@gmail.com>
Assisted-by: Claude Code:claude-fable-5-1
Signed-off-by: Adrian Betschart <adrian.betschart@cinemaone.ch>
Reviewed-by: Fangzhi Zuo <jerry.zuo@amd.com>
Tested-by: Adolfo Rodrigues <adolfotregosa@gmail.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit 7de432bc753133764dc40d37f9388da56de251e7)

1 files changed, 127 insertions, 0 deletions

diff --git a/drivers/message/fusion/mptlan.h b/drivers/message/fusion/mptlan.h
new file mode 100644
index 000000000..40b34f670
--- /dev/null
+++ b/drivers/message/fusion/mptlan.h
@@ -0,0 +1,127 @@
+/*
+ *  linux/drivers/message/fusion/mptlan.h
+ *      IP Over Fibre Channel device driver.
+ *      For use with LSI Fibre Channel PCI chip/adapters
+ *      running LSI Fusion MPT (Message Passing Technology) firmware.
+ *
+ *  Copyright (c) 2000-2008 LSI Corporation
+ *  (mailto:DL-MPTFusionLinux@lsi.com)
+ *
+ */
+/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
+/*
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; version 2 of the License.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    NO WARRANTY
+    THE PROGRAM IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OR
+    CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED INCLUDING, WITHOUT
+    LIMITATION, ANY WARRANTIES OR CONDITIONS OF TITLE, NON-INFRINGEMENT,
+    MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Each Recipient is
+    solely responsible for determining the appropriateness of using and
+    distributing the Program and assumes all risks associated with its
+    exercise of rights under this Agreement, including but not limited to
+    the risks and costs of program errors, damage to or loss of data,
+    programs or equipment, and unavailability or interruption of operations.
+
+    DISCLAIMER OF LIABILITY
+    NEITHER RECIPIENT NOR ANY CONTRIBUTORS SHALL HAVE ANY LIABILITY FOR ANY
+    DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+    DAMAGES (INCLUDING WITHOUT LIMITATION LOST PROFITS), HOWEVER CAUSED AND
+    ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
+    TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
+    USE OR DISTRIBUTION OF THE PROGRAM OR THE EXERCISE OF ANY RIGHTS GRANTED
+    HEREUNDER, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+*/
+/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
+
+/* mptlan.h */
+
+#ifndef LINUX_MPTLAN_H_INCLUDED
+#define LINUX_MPTLAN_H_INCLUDED
+/*****************************************************************************/
+
+#include <linux/module.h>
+#include <linux/netdevice.h>
+#include <linux/errno.h>
+// #include <linux/etherdevice.h>
+#include <linux/fcdevice.h>
+// #include <linux/fddidevice.h>
+#include <linux/skbuff.h>
+#include <linux/if_arp.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/printk.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <linux/workqueue.h>
+#include <linux/delay.h>
+
+#include <linux/uaccess.h>
+#include <asm/io.h>
+
+    /* Override mptbase.h by pre-defining these! */
+#define MODULEAUTHOR	"LSI Corporation"
+
+#include "mptbase.h"
+
+/*****************************************************************************/
+#define LANAME		"Fusion MPT LAN driver"
+#define LANVER		MPT_LINUX_VERSION_COMMON
+
+#ifdef MODULE
+MODULE_AUTHOR(MODULEAUTHOR);
+MODULE_DESCRIPTION(LANAME);
+#endif
+/*****************************************************************************/
+
+#define MPT_LAN_MAX_BUCKETS_OUT 256
+#define MPT_LAN_BUCKET_THRESH	18 /* 9 buckets in one message */
+#define MPT_LAN_BUCKETS_REMAIN_MISMATCH_THRESH 10
+#define MPT_LAN_RX_COPYBREAK	200
+#define MPT_LAN_TX_TIMEOUT	(1*HZ)
+#define MPT_TX_MAX_OUT_LIM      127
+
+#define MPT_LAN_MIN_MTU		96		/* RFC2625 */
+#define MPT_LAN_MAX_MTU		65280		/* RFC2625 */
+#define MPT_LAN_MTU             13312		/* Max perf range + lower mem
+						   usage than 16128 */
+
+#define MPT_LAN_NAA_RFC2625     0x1
+#define MPT_LAN_NAA_QLOGIC      0x2
+
+/* MPT LAN Reset and Suspend Resource Flags Defines */
+
+#define MPT_LAN_RESOURCE_FLAG_RETURN_POSTED_BUCKETS    0x01
+#define MPT_LAN_RESOURCE_FLAG_RETURN_PEND_TRANSMITS    0x02
+
+/*****************************************************************************/
+#ifdef MPT_LAN_IO_DEBUG
+#define dioprintk(x)  printk x
+#else
+#define dioprintk(x)  no_printk x
+#endif
+
+#ifdef MPT_LAN_DEBUG
+#define dlprintk(x)  printk x
+#else
+#define dlprintk(x)  no_printk x
+#endif
+
+#define NETDEV_TO_LANPRIV_PTR(d)	((struct mpt_lan_priv *)netdev_priv(d))
+#define NETDEV_PTR_TO_IOC_NAME_s(d)	(NETDEV_TO_LANPRIV_PTR(d)->mpt_dev->name)
+#define IOC_AND_NETDEV_NAMES_s_s(d)	NETDEV_PTR_TO_IOC_NAME_s(d), (d)->name
+
+/*****************************************************************************/
+#endif
+