From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mail-pl1-x644.google.com ([2607:f8b0:4864:20::644]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1gtj3D-0005zO-7D for barebox@lists.infradead.org; Wed, 13 Feb 2019 01:09:25 +0000 Received: by mail-pl1-x644.google.com with SMTP id s1so316342plp.9 for ; Tue, 12 Feb 2019 17:09:22 -0800 (PST) From: Andrey Smirnov Date: Tue, 12 Feb 2019 17:09:07 -0800 Message-Id: <20190213010907.20429-1-andrew.smirnov@gmail.com> MIME-Version: 1.0 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "barebox" Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: [PATCH v2] ARM: i.MX8MQ: Add code to report HDMI/eDP firmware version To: barebox@lists.infradead.org Cc: Andrey Smirnov 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 --- 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 #include +#include #include #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