[S] Change in coreboot[main]: soc/intel/pantherlake: Refactor FSP log level control

[Subrata Banik (Code Review)]

Subrata Banik has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/85934?usp=email )

Change subject: soc/intel/pantherlake: Refactor FSP log level control
......................................................................

soc/intel/pantherlake: Refactor FSP log level control

Refactor the FSP log level control by introducing a helper function
`fsp_set_debug_level()` to set the serial and MRC debug levels.

This change improves code readability and maintainability by separating
the log level setting logic from the main control flow. It also adds a
check to ensure the configured log levels are valid.

Change-Id: I6efd6a0ea006b4013dce1c8849b7dbbd4ea5e1dc
Signed-off-by: Subrata Banik 
---
M src/soc/intel/pantherlake/romstage/fsp_params.c
1 file changed, 22 insertions(+), 9 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/34/85934/1

diff --git a/src/soc/intel/pantherlake/romstage/fsp_params.c b/src/soc/intel/pantherlake/romstage/fsp_params.c
index 57954e0..d2724fe 100644
--- a/src/soc/intel/pantherlake/romstage/fsp_params.c
+++ b/src/soc/intel/pantherlake/romstage/fsp_params.c
@@ -296,6 +296,15 @@
    	fill_fspm_params[i](m_cfg, config);
 }

+static void fsp_set_debug_level(FSP_M_CONFIG *m_cfg,
+	 enum fsp_log_level fsp_pcd_log_level, enum fsp_log_level fsp_mrc_log_level)
+{
+	/* Set Serial debug message level */
+	m_cfg->PcdSerialDebugLevel = fsp_pcd_log_level;
+	/* Set MRC debug level */
+	m_cfg->SerialDebugMrcLevel = fsp_mrc_log_level;
+}
+
 static void fsp_control_log_level(FSPM_UPD *mupd, bool is_enabled)
 {
    FSP_M_CONFIG *m_cfg = &mupd->FspmConfig;
@@ -303,17 +312,21 @@

if (is_enabled) {
    	enum fsp_log_level log_level = fsp_map_console_log_level();
-		arch_upd->FspEventHandler = (uintptr_t)((FSP_EVENT_HANDLER *)fsp_debug_event_handler);
-		/* Set Serial debug message level */
-		m_cfg->PcdSerialDebugLevel = log_level;
-		/* Set MRC debug level */
-		m_cfg->SerialDebugMrcLevel = log_level;
+		fsp_set_debug_level(m_cfg, log_level, log_level);
    } else {
-		/* Disable Serial debug message */
-		m_cfg->PcdSerialDebugLevel = 0;
-		/* Disable MRC debug message */
-		m_cfg->SerialDebugMrcLevel = 0;
+		/* Disable Serial/MRC debug message */
+		fsp_set_debug_level(m_cfg, 0, 0);
    }
+
+	if ((m_cfg->PcdSerialDebugLevel > FSP_LOG_LEVEL_VERBOSE) ||
+		 (m_cfg->SerialDebugMrcLevel > FSP_LOG_LEVEL_VERBOSE)) {
+		 printk(BIOS_ERR, "Invalid FSP log level\n");
+		 return;
+	}
+
+	/* Set Event Handler if log-level is non-zero */
+	if (m_cfg->PcdSerialDebugLevel || m_cfg->SerialDebugMrcLevel)
+		arch_upd->FspEventHandler = (uintptr_t)((FSP_EVENT_HANDLER *)fsp_debug_event_handler);
 }

static void fill_fsp_event_handler(FSPM_UPD *mupd)