[coreboot-gerrit] Change in coreboot[master]: drivers/intel/gma/edid: Measure execution time of EDID read function

[Paul Menzel (Code Review)]

Paul Menzel has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/38646 )

Change subject: drivers/intel/gma/edid: Measure execution time of EDID read function
......................................................................

drivers/intel/gma/edid: Measure execution time of EDID read function

Getting more data, it might turn out, that storing the EDID data in CBFS
might save some time.

Change-Id: I4c3672ef85bfc2d206620e689626573e04a0f63b
Signed-off-by: Paul Menzel 
---
M src/drivers/intel/gma/edid.c
1 file changed, 5 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/46/38646/1

diff --git a/src/drivers/intel/gma/edid.c b/src/drivers/intel/gma/edid.c
index 7e6c840..6885f98 100644
--- a/src/drivers/intel/gma/edid.c
+++ b/src/drivers/intel/gma/edid.c
@@ -15,6 +15,7 @@
 #include <device/mmio.h>
 #include <console/console.h>
 #include <delay.h>
+#include <timer.h>

#include "i915_reg.h"
 #include "edid.h"
@@ -66,10 +67,12 @@
 void intel_gmbus_read_edid(u8 *mmio, u8 bus, u8 slave, u8 *edid, u32 edid_size)
 {
    unsigned int i;
+	struct stopwatch sw;

slave &= 0x7f;
    edid_size &= 0x1fc;

+	stopwatch_init(&sw);
    wait_rdy(mmio);
    /* 100 KHz, hold 0ns,  */
    write32(GMBUS0_ADDR, bus);
@@ -107,4 +110,6 @@
    	if ((i & 0xf) == 0xf)
    		printk (BIOS_SPEW, "\n");
    }
+	printk(BIOS_DEBUG, "%s finished in %lu msecs\n", __func__,
+			stopwatch_duration_msecs(&sw));
 }