commit a4c19b0032900982b4e8ae85791f4dbd498457a8
author Delphine CC Chiu <Delphine_CC_Chiu@wiwynn.com> Wed Mar 01 13:15:45 2023 +0800
committer DelphineCCChiu <Delphine_CC_Chiu@wiwynn.com> Mon Apr 24 01:14:51 2023 +0000
tree fd267315e568bb55d68b617fc101b4ae0325e9c5
parent 65a66543d3ef4f5e68b3fd3c6b66e4238a164eaf

Support OCP debug card postcode display

Description:
 - Meson option postcode display path is supported
 - Support OCP debug card postcode display

Example of test process:
   1. Set postcode-display-path as /sys/bus/i2c/devices/12-
      000f/postcode-display-slot in project layer
   2. Press OCP debug card uart button to the host to check
   3. Host power on
   4. The postcode should start displaying on the OCP debug card screen
      with user-readable string representation for those codes
Note:
 - The postcode-display-path was setting by CLD driver, which
   will though CPLD setting ocp-debug card
   (link: https://lore.kernel.org/lkml/20230117094425.19004-1-Delphine_CC_Chiu@Wiwynn.com/)

Signed-off-by: Delphine CC Chiu <Delphine_CC_Chiu@wiwynn.com>
Change-Id: I915c0ec29d763b8933835a9fdc8881648ca95d24

meson.build

diff --git a/meson.build b/meson.build
index 5a078f8..0a42309 100644
--- a/meson.build
+++ b/meson.build
@@ -15,6 +15,7 @@
 conf_data = configuration_data()
 conf_data.set_quoted('DBUS_OBJECT_NAME', '/xyz/openbmc_project/State/Boot/PostCode')
 conf_data.set_quoted('DBUS_INTF_NAME','xyz.openbmc_project.State.Boot.PostCode')
+conf_data.set_quoted('POSTCODE_DISPLAY_PATH', get_option('postcode-display-path'))
 conf_data.set('MAX_BOOT_CYCLE_COUNT',get_option('max-boot-cycle-count'))
 conf_data.set('MAX_POST_CODE_SIZE_PER_CYCLE',get_option('max-post-code-size-per-cycle'))
 

meson_options.txt

diff --git a/meson_options.txt b/meson_options.txt
index d877b97..763b30f 100644
--- a/meson_options.txt
+++ b/meson_options.txt
@@ -1,3 +1,4 @@
 option('max-boot-cycle-count', type:'integer', min:1, max: 100, description: 'Maximum boot cycles for which the post codes should be persisted', value:100)
 option('bios-post-code-log', type:'feature',description:'bios post code log',value:'disabled')
 option('max-post-code-size-per-cycle', type:'integer', min:64, max: 1024, description: 'Maximum post code file size per cycle', value:512)
+option('postcode-display-path', type:'string', description:'The sys path for postcode display on debug card')

src/post_code.cpp

diff --git a/src/post_code.cpp b/src/post_code.cpp
index 327e29e..ddabf30 100644
--- a/src/post_code.cpp
+++ b/src/post_code.cpp
@@ -112,6 +112,17 @@
         timer->start(std::chrono::microseconds(timeoutMicroSeconds));
     }
 
+    if (strlen(POSTCODE_DISPLAY_PATH) > 0)
+    {
+        std::string postCodeDisplayPath = POSTCODE_DISPLAY_PATH +
+                                          std::to_string(node);
+
+        std::ofstream postCodeDisplayFile(postCodeDisplayPath);
+        postCodeDisplayFile << "0x" << std::setfill('0') << std::setw(2)
+                            << std::hex << std::get<0>(code);
+        postCodeDisplayFile.close();
+    }
+
 #ifdef ENABLE_BIOS_POST_CODE_LOG
     uint64_t usTimeOffset = tsUS - firstPostCodeUsSinceEpoch;
     std::ostringstream hexCode;