From: Andrey Smirnov <andrew.smirnov@gmail.com>
To: barebox@lists.infradead.org
Cc: Andrey Smirnov <andrew.smirnov@gmail.com>
Subject: [PATCH v2] ARM: i.MX8MQ: Add code to report HDMI/eDP firmware version
Date: Tue, 12 Feb 2019 17:09:07 -0800 [thread overview]
Message-ID: <20190213010907.20429-1-andrew.smirnov@gmail.com> (raw)
Port code found in cdn_dp_load_firmware() in Linux kernel to check if
HDMI firmware is running and, if so, report its version.
Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
---
Changes since [v1]:
- Added CPU type check to prevent execution on non-i.MX8MQ SoCs.
- Changes messages to say "HDP" instead of "HDMI", to clarify that
the check covers both HDMI _and_ eDP firmware.
[v1] http://lists.infradead.org/pipermail/barebox/2019-February/037059.html
arch/arm/mach-imx/imx8mq.c | 40 ++++++++++++++++++++++++++++++++++++++
1 file changed, 40 insertions(+)
diff --git a/arch/arm/mach-imx/imx8mq.c b/arch/arm/mach-imx/imx8mq.c
index 4d00da5f0..d887092ce 100644
--- a/arch/arm/mach-imx/imx8mq.c
+++ b/arch/arm/mach-imx/imx8mq.c
@@ -21,6 +21,7 @@
#include <mach/imx8mq.h>
#include <mach/reset-reason.h>
+#include <linux/iopoll.h>
#include <linux/arm-smccc.h>
#define FSL_SIP_BUILDINFO 0xC2000003
@@ -81,3 +82,42 @@ int imx8mq_init(void)
return 0;
}
+
+#define KEEP_ALIVE 0x18
+#define VER_L 0x1c
+#define VER_H 0x20
+#define VER_LIB_L_ADDR 0x24
+#define VER_LIB_H_ADDR 0x28
+#define FW_ALIVE_TIMEOUT_US 100000
+
+static int imx8mq_report_hdmi_firmware(void)
+{
+ void __iomem *hdmi = IOMEM(MX8MQ_HDMI_CTRL_BASE_ADDR);
+ u16 ver_lib, ver;
+ u32 reg;
+ int ret;
+
+ if (!cpu_is_mx8mq())
+ return 0;
+
+ /* check the keep alive register to make sure fw working */
+ ret = readl_poll_timeout(hdmi + KEEP_ALIVE,
+ reg, reg, FW_ALIVE_TIMEOUT_US);
+ if (ret < 0) {
+ pr_info("HDP firmware is not running\n");
+ return 0;
+ }
+
+ ver = readl(hdmi + VER_H) & 0xff;
+ ver <<= 8;
+ ver |= readl(hdmi + VER_L) & 0xff;
+
+ ver_lib = readl(hdmi + VER_LIB_H_ADDR) & 0xff;
+ ver_lib <<= 8;
+ ver_lib |= readl(hdmi + VER_LIB_L_ADDR) & 0xff;
+
+ pr_info("HDP firmware ver: %d ver_lib: %d\n", ver, ver_lib);
+
+ return 0;
+}
+console_initcall(imx8mq_report_hdmi_firmware);
--
2.20.1
_______________________________________________
barebox mailing list
barebox@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/barebox
next reply other threads:[~2019-02-13 1:09 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-13 1:09 Andrey Smirnov [this message]
2019-02-18 8:56 ` Sascha Hauer
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20190213010907.20429-1-andrew.smirnov@gmail.com \
--to=andrew.smirnov@gmail.com \
--cc=barebox@lists.infradead.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox