[PATCH] i.MX28: Shut down the LCD controller to avoid bootrom sampling bug

[PATCH] i.MX28: Shut down the LCD controller to avoid bootrom sampling bug

[Marek Vasut]

From: Marek Vasut <marek.vasut@gmail.com>

Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
Cc: Chen Peter-B29397 <B29397@freescale.com>
Cc: Detlev Zundel <dzu@denx.de>
Cc: Fabio Estevam <festevam@gmail.com>
Cc: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Cc: Li Frank-B20596 <B20596@freescale.com>
Cc: Lin Tony-B19295 <B19295@freescale.com>
Cc: Linux FBDEV <linux-fbdev@vger.kernel.org>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Shawn Guo <shawn.guo@freescale.com>
Cc: Shawn Guo <shawn.guo@linaro.org>
Cc: Stefano Babic <sbabic@denx.de>
Cc: Subodh Nijsure <snijsure@grid-net.com>
Cc: Tony Lin <tony.lin@freescale.com>
Cc: Wolfgang Denk <wd@denx.de>
Acked-by: Wolfram Sang <w.sang@pengutronix.de>
---
 drivers/video/mxsfb.c |   13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/drivers/video/mxsfb.c b/drivers/video/mxsfb.c
index 4a89f88..a265356 100644
--- a/drivers/video/mxsfb.c
+++ b/drivers/video/mxsfb.c
@@ -880,6 +880,18 @@ static int __devexit mxsfb_remove(struct platform_device *pdev)
 	return 0;
 }
 
+void mxsfb_shutdown(struct platform_device *pdev)
+{
+	struct fb_info *fb_info = platform_get_drvdata(pdev);
+	struct mxsfb_info *host = to_imxfb_host(fb_info);
+
+	/*
+	 * Force stop the LCD controller as keeping it running during reboot
+	 * might interfere with the BootROM's boot mode pads sampling.
+	 */
+	writel(CTRL_RUN, host->base + LCDC_CTRL + REG_CLR);
+}
+
 static struct platform_device_id mxsfb_devtype[] = {
 	{
 		.name = "imx23-fb",
@@ -896,6 +908,7 @@ MODULE_DEVICE_TABLE(platform, mxsfb_devtype);
 static struct platform_driver mxsfb_driver = {
 	.probe = mxsfb_probe,
 	.remove = __devexit_p(mxsfb_remove),
+	.shutdown = mxsfb_shutdown,
 	.id_table = mxsfb_devtype,
 	.driver = {
 		   .name = DRIVER_NAME,
-- 
1.7.9.5

[PATCH] i.MX28: Shut down the LCD controller to avoid bootrom sampling bug

[Marek Vasut]

From: Marek Vasut <marek.vasut@gmail.com>

Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
Cc: Chen Peter-B29397 <B29397@freescale.com>
Cc: Detlev Zundel <dzu@denx.de>
Cc: Fabio Estevam <festevam@gmail.com>
Cc: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Cc: Li Frank-B20596 <B20596@freescale.com>
Cc: Lin Tony-B19295 <B19295@freescale.com>
Cc: Linux FBDEV <linux-fbdev@vger.kernel.org>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Shawn Guo <shawn.guo@freescale.com>
Cc: Shawn Guo <shawn.guo@linaro.org>
Cc: Stefano Babic <sbabic@denx.de>
Cc: Subodh Nijsure <snijsure@grid-net.com>
Cc: Tony Lin <tony.lin@freescale.com>
Cc: Wolfgang Denk <wd@denx.de>
Acked-by: Wolfram Sang <w.sang@pengutronix.de>
---
 drivers/video/mxsfb.c |   13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/drivers/video/mxsfb.c b/drivers/video/mxsfb.c
index 4a89f88..a265356 100644
--- a/drivers/video/mxsfb.c
+++ b/drivers/video/mxsfb.c
@@ -880,6 +880,18 @@ static int __devexit mxsfb_remove(struct platform_device *pdev)
 	return 0;
 }
 
+void mxsfb_shutdown(struct platform_device *pdev)
+{
+	struct fb_info *fb_info = platform_get_drvdata(pdev);
+	struct mxsfb_info *host = to_imxfb_host(fb_info);
+
+	/*
+	 * Force stop the LCD controller as keeping it running during reboot
+	 * might interfere with the BootROM's boot mode pads sampling.
+	 */
+	writel(CTRL_RUN, host->base + LCDC_CTRL + REG_CLR);
+}
+
 static struct platform_device_id mxsfb_devtype[] = {
 	{
 		.name = "imx23-fb",
@@ -896,6 +908,7 @@ MODULE_DEVICE_TABLE(platform, mxsfb_devtype);
 static struct platform_driver mxsfb_driver = {
 	.probe = mxsfb_probe,
 	.remove = __devexit_p(mxsfb_remove),
+	.shutdown = mxsfb_shutdown,
 	.id_table = mxsfb_devtype,
 	.driver = {
 		   .name = DRIVER_NAME,
-- 
1.7.9.5

Re: [PATCH] i.MX28: Shut down the LCD controller to avoid bootrom sampling bug

[Wolfgang Denk]

Dear Marek,

In message <1334695011-8188-1-git-send-email-marex@denx.de> you wrote:
> From: Marek Vasut <marek.vasut@gmail.com>
> 
> Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
> Cc: Chen Peter-B29397 <B29397@freescale.com>
> Cc: Detlev Zundel <dzu@denx.de>
> Cc: Fabio Estevam <festevam@gmail.com>
> Cc: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
> Cc: Li Frank-B20596 <B20596@freescale.com>
> Cc: Lin Tony-B19295 <B19295@freescale.com>
> Cc: Linux FBDEV <linux-fbdev@vger.kernel.org>
> Cc: Sascha Hauer <s.hauer@pengutronix.de>
> Cc: Shawn Guo <shawn.guo@freescale.com>
> Cc: Shawn Guo <shawn.guo@linaro.org>
> Cc: Stefano Babic <sbabic@denx.de>
> Cc: Subodh Nijsure <snijsure@grid-net.com>
> Cc: Tony Lin <tony.lin@freescale.com>
> Cc: Wolfgang Denk <wd@denx.de>
> Acked-by: Wolfram Sang <w.sang@pengutronix.de>
> ---
>  drivers/video/mxsfb.c |   13 +++++++++++++
>  1 file changed, 13 insertions(+)

Acked-by: Wolfgang Denk <wd@denx.de>
Tested-by: Wolfgang Denk <wd@denx.de>


Best regards,

Wolfgang Denk

-- 
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd@denx.de
A dog always bit deepest on the veterinary hand.
                                    - Terry Pratchett, _Wyrd Sisters_

[PATCH] i.MX28: Shut down the LCD controller to avoid bootrom sampling bug

[Wolfgang Denk]

Dear Marek,

In message <1334695011-8188-1-git-send-email-marex@denx.de> you wrote:
> From: Marek Vasut <marek.vasut@gmail.com>
> 
> Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
> Cc: Chen Peter-B29397 <B29397@freescale.com>
> Cc: Detlev Zundel <dzu@denx.de>
> Cc: Fabio Estevam <festevam@gmail.com>
> Cc: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
> Cc: Li Frank-B20596 <B20596@freescale.com>
> Cc: Lin Tony-B19295 <B19295@freescale.com>
> Cc: Linux FBDEV <linux-fbdev@vger.kernel.org>
> Cc: Sascha Hauer <s.hauer@pengutronix.de>
> Cc: Shawn Guo <shawn.guo@freescale.com>
> Cc: Shawn Guo <shawn.guo@linaro.org>
> Cc: Stefano Babic <sbabic@denx.de>
> Cc: Subodh Nijsure <snijsure@grid-net.com>
> Cc: Tony Lin <tony.lin@freescale.com>
> Cc: Wolfgang Denk <wd@denx.de>
> Acked-by: Wolfram Sang <w.sang@pengutronix.de>
> ---
>  drivers/video/mxsfb.c |   13 +++++++++++++
>  1 file changed, 13 insertions(+)

Acked-by: Wolfgang Denk <wd@denx.de>
Tested-by: Wolfgang Denk <wd@denx.de>


Best regards,

Wolfgang Denk

-- 
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
A dog always bit deepest on the veterinary hand.
                                    - Terry Pratchett, _Wyrd Sisters_

Re: [PATCH] i.MX28: Shut down the LCD controller to avoid bootrom sampling bug

[Florian Tobias Schandinat]

Hi,

On 04/17/2012 08:36 PM, Marek Vasut wrote:
> From: Marek Vasut <marek.vasut@gmail.com>

please write a commit message that describes the bug you want to fix and
why/how your patch fixes it.


Thanks,

Florian Tobias Schandinat

> Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
> Cc: Chen Peter-B29397 <B29397@freescale.com>
> Cc: Detlev Zundel <dzu@denx.de>
> Cc: Fabio Estevam <festevam@gmail.com>
> Cc: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
> Cc: Li Frank-B20596 <B20596@freescale.com>
> Cc: Lin Tony-B19295 <B19295@freescale.com>
> Cc: Linux FBDEV <linux-fbdev@vger.kernel.org>
> Cc: Sascha Hauer <s.hauer@pengutronix.de>
> Cc: Shawn Guo <shawn.guo@freescale.com>
> Cc: Shawn Guo <shawn.guo@linaro.org>
> Cc: Stefano Babic <sbabic@denx.de>
> Cc: Subodh Nijsure <snijsure@grid-net.com>
> Cc: Tony Lin <tony.lin@freescale.com>
> Cc: Wolfgang Denk <wd@denx.de>
> Acked-by: Wolfram Sang <w.sang@pengutronix.de>
> ---
>  drivers/video/mxsfb.c |   13 +++++++++++++
>  1 file changed, 13 insertions(+)
> 
> diff --git a/drivers/video/mxsfb.c b/drivers/video/mxsfb.c
> index 4a89f88..a265356 100644
> --- a/drivers/video/mxsfb.c
> +++ b/drivers/video/mxsfb.c
> @@ -880,6 +880,18 @@ static int __devexit mxsfb_remove(struct platform_device *pdev)
>  	return 0;
>  }
>  
> +void mxsfb_shutdown(struct platform_device *pdev)
> +{
> +	struct fb_info *fb_info = platform_get_drvdata(pdev);
> +	struct mxsfb_info *host = to_imxfb_host(fb_info);
> +
> +	/*
> +	 * Force stop the LCD controller as keeping it running during reboot
> +	 * might interfere with the BootROM's boot mode pads sampling.
> +	 */
> +	writel(CTRL_RUN, host->base + LCDC_CTRL + REG_CLR);
> +}
> +
>  static struct platform_device_id mxsfb_devtype[] = {
>  	{
>  		.name = "imx23-fb",
> @@ -896,6 +908,7 @@ MODULE_DEVICE_TABLE(platform, mxsfb_devtype);
>  static struct platform_driver mxsfb_driver = {
>  	.probe = mxsfb_probe,
>  	.remove = __devexit_p(mxsfb_remove),
> +	.shutdown = mxsfb_shutdown,
>  	.id_table = mxsfb_devtype,
>  	.driver = {
>  		   .name = DRIVER_NAME,

[PATCH] i.MX28: Shut down the LCD controller to avoid bootrom sampling bug

[Florian Tobias Schandinat]

Hi,

On 04/17/2012 08:36 PM, Marek Vasut wrote:
> From: Marek Vasut <marek.vasut@gmail.com>

please write a commit message that describes the bug you want to fix and
why/how your patch fixes it.


Thanks,

Florian Tobias Schandinat

> Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
> Cc: Chen Peter-B29397 <B29397@freescale.com>
> Cc: Detlev Zundel <dzu@denx.de>
> Cc: Fabio Estevam <festevam@gmail.com>
> Cc: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
> Cc: Li Frank-B20596 <B20596@freescale.com>
> Cc: Lin Tony-B19295 <B19295@freescale.com>
> Cc: Linux FBDEV <linux-fbdev@vger.kernel.org>
> Cc: Sascha Hauer <s.hauer@pengutronix.de>
> Cc: Shawn Guo <shawn.guo@freescale.com>
> Cc: Shawn Guo <shawn.guo@linaro.org>
> Cc: Stefano Babic <sbabic@denx.de>
> Cc: Subodh Nijsure <snijsure@grid-net.com>
> Cc: Tony Lin <tony.lin@freescale.com>
> Cc: Wolfgang Denk <wd@denx.de>
> Acked-by: Wolfram Sang <w.sang@pengutronix.de>
> ---
>  drivers/video/mxsfb.c |   13 +++++++++++++
>  1 file changed, 13 insertions(+)
> 
> diff --git a/drivers/video/mxsfb.c b/drivers/video/mxsfb.c
> index 4a89f88..a265356 100644
> --- a/drivers/video/mxsfb.c
> +++ b/drivers/video/mxsfb.c
> @@ -880,6 +880,18 @@ static int __devexit mxsfb_remove(struct platform_device *pdev)
>  	return 0;
>  }
>  
> +void mxsfb_shutdown(struct platform_device *pdev)
> +{
> +	struct fb_info *fb_info = platform_get_drvdata(pdev);
> +	struct mxsfb_info *host = to_imxfb_host(fb_info);
> +
> +	/*
> +	 * Force stop the LCD controller as keeping it running during reboot
> +	 * might interfere with the BootROM's boot mode pads sampling.
> +	 */
> +	writel(CTRL_RUN, host->base + LCDC_CTRL + REG_CLR);
> +}
> +
>  static struct platform_device_id mxsfb_devtype[] = {
>  	{
>  		.name = "imx23-fb",
> @@ -896,6 +908,7 @@ MODULE_DEVICE_TABLE(platform, mxsfb_devtype);
>  static struct platform_driver mxsfb_driver = {
>  	.probe = mxsfb_probe,
>  	.remove = __devexit_p(mxsfb_remove),
> +	.shutdown = mxsfb_shutdown,
>  	.id_table = mxsfb_devtype,
>  	.driver = {
>  		   .name = DRIVER_NAME,

[PATCH] i.MX28: Shut down the LCD controller to avoid BootROM sampling bug

[Marek Vasut]

From: Marek Vasut <marek.vasut@gmail.com>

If there's some traffic on the LCD controller pads, the BootROM has trouble with
sampling the bootmode from these pads when the system is restarted from Linux.
The BootROM usually ends in a loop.

Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
Cc: Chen Peter-B29397 <B29397@freescale.com>
Cc: Detlev Zundel <dzu@denx.de>
Cc: Fabio Estevam <festevam@gmail.com>
Cc: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Cc: Li Frank-B20596 <B20596@freescale.com>
Cc: Lin Tony-B19295 <B19295@freescale.com>
Cc: Linux FBDEV <linux-fbdev@vger.kernel.org>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Shawn Guo <shawn.guo@freescale.com>
Cc: Shawn Guo <shawn.guo@linaro.org>
Cc: Stefano Babic <sbabic@denx.de>
Cc: Subodh Nijsure <snijsure@grid-net.com>
Cc: Tony Lin <tony.lin@freescale.com>
Cc: Wolfgang Denk <wd@denx.de>
Acked-by: Wolfram Sang <w.sang@pengutronix.de>
Acked-by: Wolfgang Denk <wd@denx.de>
Tested-by: Wolfgang Denk <wd@denx.de>
---
 drivers/video/mxsfb.c |   13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/drivers/video/mxsfb.c b/drivers/video/mxsfb.c
index 4a89f88..a265356 100644
--- a/drivers/video/mxsfb.c
+++ b/drivers/video/mxsfb.c
@@ -880,6 +880,18 @@ static int __devexit mxsfb_remove(struct platform_device *pdev)
 	return 0;
 }
 
+void mxsfb_shutdown(struct platform_device *pdev)
+{
+	struct fb_info *fb_info = platform_get_drvdata(pdev);
+	struct mxsfb_info *host = to_imxfb_host(fb_info);
+
+	/*
+	 * Force stop the LCD controller as keeping it running during reboot
+	 * might interfere with the BootROM's boot mode pads sampling.
+	 */
+	writel(CTRL_RUN, host->base + LCDC_CTRL + REG_CLR);
+}
+
 static struct platform_device_id mxsfb_devtype[] = {
 	{
 		.name = "imx23-fb",
@@ -896,6 +908,7 @@ MODULE_DEVICE_TABLE(platform, mxsfb_devtype);
 static struct platform_driver mxsfb_driver = {
 	.probe = mxsfb_probe,
 	.remove = __devexit_p(mxsfb_remove),
+	.shutdown = mxsfb_shutdown,
 	.id_table = mxsfb_devtype,
 	.driver = {
 		   .name = DRIVER_NAME,
-- 
1.7.9.5

[PATCH] i.MX28: Shut down the LCD controller to avoid BootROM sampling bug

[Marek Vasut]

From: Marek Vasut <marek.vasut@gmail.com>

If there's some traffic on the LCD controller pads, the BootROM has trouble with
sampling the bootmode from these pads when the system is restarted from Linux.
The BootROM usually ends in a loop.

Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
Cc: Chen Peter-B29397 <B29397@freescale.com>
Cc: Detlev Zundel <dzu@denx.de>
Cc: Fabio Estevam <festevam@gmail.com>
Cc: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Cc: Li Frank-B20596 <B20596@freescale.com>
Cc: Lin Tony-B19295 <B19295@freescale.com>
Cc: Linux FBDEV <linux-fbdev@vger.kernel.org>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Shawn Guo <shawn.guo@freescale.com>
Cc: Shawn Guo <shawn.guo@linaro.org>
Cc: Stefano Babic <sbabic@denx.de>
Cc: Subodh Nijsure <snijsure@grid-net.com>
Cc: Tony Lin <tony.lin@freescale.com>
Cc: Wolfgang Denk <wd@denx.de>
Acked-by: Wolfram Sang <w.sang@pengutronix.de>
Acked-by: Wolfgang Denk <wd@denx.de>
Tested-by: Wolfgang Denk <wd@denx.de>
---
 drivers/video/mxsfb.c |   13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/drivers/video/mxsfb.c b/drivers/video/mxsfb.c
index 4a89f88..a265356 100644
--- a/drivers/video/mxsfb.c
+++ b/drivers/video/mxsfb.c
@@ -880,6 +880,18 @@ static int __devexit mxsfb_remove(struct platform_device *pdev)
 	return 0;
 }
 
+void mxsfb_shutdown(struct platform_device *pdev)
+{
+	struct fb_info *fb_info = platform_get_drvdata(pdev);
+	struct mxsfb_info *host = to_imxfb_host(fb_info);
+
+	/*
+	 * Force stop the LCD controller as keeping it running during reboot
+	 * might interfere with the BootROM's boot mode pads sampling.
+	 */
+	writel(CTRL_RUN, host->base + LCDC_CTRL + REG_CLR);
+}
+
 static struct platform_device_id mxsfb_devtype[] = {
 	{
 		.name = "imx23-fb",
@@ -896,6 +908,7 @@ MODULE_DEVICE_TABLE(platform, mxsfb_devtype);
 static struct platform_driver mxsfb_driver = {
 	.probe = mxsfb_probe,
 	.remove = __devexit_p(mxsfb_remove),
+	.shutdown = mxsfb_shutdown,
 	.id_table = mxsfb_devtype,
 	.driver = {
 		   .name = DRIVER_NAME,
-- 
1.7.9.5

Re: [PATCH] i.MX28: Shut down the LCD controller to avoid BootROM sampling bug

[Shawn Guo]

On Wed, Apr 18, 2012 at 06:48:00PM +0200, Marek Vasut wrote:
...
> +void mxsfb_shutdown(struct platform_device *pdev)

static?

Otherwise,

Acked-by: Shawn Guo <shawn.guo@linaro.org>

> +{
> +	struct fb_info *fb_info = platform_get_drvdata(pdev);
> +	struct mxsfb_info *host = to_imxfb_host(fb_info);
> +
> +	/*
> +	 * Force stop the LCD controller as keeping it running during reboot
> +	 * might interfere with the BootROM's boot mode pads sampling.
> +	 */
> +	writel(CTRL_RUN, host->base + LCDC_CTRL + REG_CLR);
> +}
> +
>  static struct platform_device_id mxsfb_devtype[] = {
>  	{
>  		.name = "imx23-fb",
> @@ -896,6 +908,7 @@ MODULE_DEVICE_TABLE(platform, mxsfb_devtype);
>  static struct platform_driver mxsfb_driver = {
>  	.probe = mxsfb_probe,
>  	.remove = __devexit_p(mxsfb_remove),
> +	.shutdown = mxsfb_shutdown,
>  	.id_table = mxsfb_devtype,
>  	.driver = {
>  		   .name = DRIVER_NAME,
> -- 
> 1.7.9.5
> 

[PATCH] i.MX28: Shut down the LCD controller to avoid BootROM sampling bug

[Shawn Guo]

On Wed, Apr 18, 2012 at 06:48:00PM +0200, Marek Vasut wrote:
...
> +void mxsfb_shutdown(struct platform_device *pdev)

static?

Otherwise,

Acked-by: Shawn Guo <shawn.guo@linaro.org>

> +{
> +	struct fb_info *fb_info = platform_get_drvdata(pdev);
> +	struct mxsfb_info *host = to_imxfb_host(fb_info);
> +
> +	/*
> +	 * Force stop the LCD controller as keeping it running during reboot
> +	 * might interfere with the BootROM's boot mode pads sampling.
> +	 */
> +	writel(CTRL_RUN, host->base + LCDC_CTRL + REG_CLR);
> +}
> +
>  static struct platform_device_id mxsfb_devtype[] = {
>  	{
>  		.name = "imx23-fb",
> @@ -896,6 +908,7 @@ MODULE_DEVICE_TABLE(platform, mxsfb_devtype);
>  static struct platform_driver mxsfb_driver = {
>  	.probe = mxsfb_probe,
>  	.remove = __devexit_p(mxsfb_remove),
> +	.shutdown = mxsfb_shutdown,
>  	.id_table = mxsfb_devtype,
>  	.driver = {
>  		   .name = DRIVER_NAME,
> -- 
> 1.7.9.5
> 

[PATCH V2] i.MX28: Shut down the LCD controller to avoid BootROM sampling bug

[Marek Vasut]

From: Marek Vasut <marek.vasut@gmail.com>

If there's some traffic on the LCD controller pads, the BootROM has trouble with
sampling the bootmode from these pads. The BootROM usually ends in a loop.

Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
Cc: Chen Peter-B29397 <B29397@freescale.com>
Cc: Detlev Zundel <dzu@denx.de>
Cc: Fabio Estevam <festevam@gmail.com>
Cc: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Cc: Li Frank-B20596 <B20596@freescale.com>
Cc: Lin Tony-B19295 <B19295@freescale.com>
Cc: Linux FBDEV <linux-fbdev@vger.kernel.org>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Shawn Guo <shawn.guo@freescale.com>
Cc: Shawn Guo <shawn.guo@linaro.org>
Cc: Stefano Babic <sbabic@denx.de>
Cc: Subodh Nijsure <snijsure@grid-net.com>
Cc: Tony Lin <tony.lin@freescale.com>
Cc: Wolfgang Denk <wd@denx.de>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Acked-by: Wolfgang Denk <wd@denx.de>
Acked-by: Wolfram Sang <w.sang@pengutronix.de>
Tested-by: Wolfgang Denk <wd@denx.de>
---
 drivers/video/mxsfb.c |   13 +++++++++++++
 1 file changed, 13 insertions(+)

V2: Make shutdown() call static

diff --git a/drivers/video/mxsfb.c b/drivers/video/mxsfb.c
index 4a89f88..dcf29bf 100644
--- a/drivers/video/mxsfb.c
+++ b/drivers/video/mxsfb.c
@@ -880,6 +880,18 @@ static int __devexit mxsfb_remove(struct platform_device *pdev)
 	return 0;
 }
 
+static void mxsfb_shutdown(struct platform_device *pdev)
+{
+	struct fb_info *fb_info = platform_get_drvdata(pdev);
+	struct mxsfb_info *host = to_imxfb_host(fb_info);
+
+	/*
+	 * Force stop the LCD controller as keeping it running during reboot
+	 * might interfere with the BootROM's boot mode pads sampling.
+	 */
+	writel(CTRL_RUN, host->base + LCDC_CTRL + REG_CLR);
+}
+
 static struct platform_device_id mxsfb_devtype[] = {
 	{
 		.name = "imx23-fb",
@@ -896,6 +908,7 @@ MODULE_DEVICE_TABLE(platform, mxsfb_devtype);
 static struct platform_driver mxsfb_driver = {
 	.probe = mxsfb_probe,
 	.remove = __devexit_p(mxsfb_remove),
+	.shutdown = mxsfb_shutdown,
 	.id_table = mxsfb_devtype,
 	.driver = {
 		   .name = DRIVER_NAME,
-- 
1.7.9.5

[PATCH V2] i.MX28: Shut down the LCD controller to avoid BootROM sampling bug

[Marek Vasut]

From: Marek Vasut <marek.vasut@gmail.com>

If there's some traffic on the LCD controller pads, the BootROM has trouble with
sampling the bootmode from these pads. The BootROM usually ends in a loop.

Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
Cc: Chen Peter-B29397 <B29397@freescale.com>
Cc: Detlev Zundel <dzu@denx.de>
Cc: Fabio Estevam <festevam@gmail.com>
Cc: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Cc: Li Frank-B20596 <B20596@freescale.com>
Cc: Lin Tony-B19295 <B19295@freescale.com>
Cc: Linux FBDEV <linux-fbdev@vger.kernel.org>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Shawn Guo <shawn.guo@freescale.com>
Cc: Shawn Guo <shawn.guo@linaro.org>
Cc: Stefano Babic <sbabic@denx.de>
Cc: Subodh Nijsure <snijsure@grid-net.com>
Cc: Tony Lin <tony.lin@freescale.com>
Cc: Wolfgang Denk <wd@denx.de>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Acked-by: Wolfgang Denk <wd@denx.de>
Acked-by: Wolfram Sang <w.sang@pengutronix.de>
Tested-by: Wolfgang Denk <wd@denx.de>
---
 drivers/video/mxsfb.c |   13 +++++++++++++
 1 file changed, 13 insertions(+)

V2: Make shutdown() call static

diff --git a/drivers/video/mxsfb.c b/drivers/video/mxsfb.c
index 4a89f88..dcf29bf 100644
--- a/drivers/video/mxsfb.c
+++ b/drivers/video/mxsfb.c
@@ -880,6 +880,18 @@ static int __devexit mxsfb_remove(struct platform_device *pdev)
 	return 0;
 }
 
+static void mxsfb_shutdown(struct platform_device *pdev)
+{
+	struct fb_info *fb_info = platform_get_drvdata(pdev);
+	struct mxsfb_info *host = to_imxfb_host(fb_info);
+
+	/*
+	 * Force stop the LCD controller as keeping it running during reboot
+	 * might interfere with the BootROM's boot mode pads sampling.
+	 */
+	writel(CTRL_RUN, host->base + LCDC_CTRL + REG_CLR);
+}
+
 static struct platform_device_id mxsfb_devtype[] = {
 	{
 		.name = "imx23-fb",
@@ -896,6 +908,7 @@ MODULE_DEVICE_TABLE(platform, mxsfb_devtype);
 static struct platform_driver mxsfb_driver = {
 	.probe = mxsfb_probe,
 	.remove = __devexit_p(mxsfb_remove),
+	.shutdown = mxsfb_shutdown,
 	.id_table = mxsfb_devtype,
 	.driver = {
 		   .name = DRIVER_NAME,
-- 
1.7.9.5

Re: [PATCH V2] i.MX28: Shut down the LCD controller to avoid BootROM sampling bug

[Florian Tobias Schandinat]

On 04/19/2012 06:31 PM, Marek Vasut wrote:
> From: Marek Vasut <marek.vasut@gmail.com>
> 
> If there's some traffic on the LCD controller pads, the BootROM has trouble with
> sampling the bootmode from these pads. The BootROM usually ends in a loop.
> 
> Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
> Cc: Chen Peter-B29397 <B29397@freescale.com>
> Cc: Detlev Zundel <dzu@denx.de>
> Cc: Fabio Estevam <festevam@gmail.com>
> Cc: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
> Cc: Li Frank-B20596 <B20596@freescale.com>
> Cc: Lin Tony-B19295 <B19295@freescale.com>
> Cc: Linux FBDEV <linux-fbdev@vger.kernel.org>
> Cc: Sascha Hauer <s.hauer@pengutronix.de>
> Cc: Shawn Guo <shawn.guo@freescale.com>
> Cc: Shawn Guo <shawn.guo@linaro.org>
> Cc: Stefano Babic <sbabic@denx.de>
> Cc: Subodh Nijsure <snijsure@grid-net.com>
> Cc: Tony Lin <tony.lin@freescale.com>
> Cc: Wolfgang Denk <wd@denx.de>
> Acked-by: Shawn Guo <shawn.guo@linaro.org>
> Acked-by: Wolfgang Denk <wd@denx.de>
> Acked-by: Wolfram Sang <w.sang@pengutronix.de>
> Tested-by: Wolfgang Denk <wd@denx.de>

Applied.


Thanks,

Florian Tobias Schandinat

> ---
>  drivers/video/mxsfb.c |   13 +++++++++++++
>  1 file changed, 13 insertions(+)
> 
> V2: Make shutdown() call static
> 
> diff --git a/drivers/video/mxsfb.c b/drivers/video/mxsfb.c
> index 4a89f88..dcf29bf 100644
> --- a/drivers/video/mxsfb.c
> +++ b/drivers/video/mxsfb.c
> @@ -880,6 +880,18 @@ static int __devexit mxsfb_remove(struct platform_device *pdev)
>  	return 0;
>  }
>  
> +static void mxsfb_shutdown(struct platform_device *pdev)
> +{
> +	struct fb_info *fb_info = platform_get_drvdata(pdev);
> +	struct mxsfb_info *host = to_imxfb_host(fb_info);
> +
> +	/*
> +	 * Force stop the LCD controller as keeping it running during reboot
> +	 * might interfere with the BootROM's boot mode pads sampling.
> +	 */
> +	writel(CTRL_RUN, host->base + LCDC_CTRL + REG_CLR);
> +}
> +
>  static struct platform_device_id mxsfb_devtype[] = {
>  	{
>  		.name = "imx23-fb",
> @@ -896,6 +908,7 @@ MODULE_DEVICE_TABLE(platform, mxsfb_devtype);
>  static struct platform_driver mxsfb_driver = {
>  	.probe = mxsfb_probe,
>  	.remove = __devexit_p(mxsfb_remove),
> +	.shutdown = mxsfb_shutdown,
>  	.id_table = mxsfb_devtype,
>  	.driver = {
>  		   .name = DRIVER_NAME,

[PATCH V2] i.MX28: Shut down the LCD controller to avoid BootROM sampling bug

[Florian Tobias Schandinat]

On 04/19/2012 06:31 PM, Marek Vasut wrote:
> From: Marek Vasut <marek.vasut@gmail.com>
> 
> If there's some traffic on the LCD controller pads, the BootROM has trouble with
> sampling the bootmode from these pads. The BootROM usually ends in a loop.
> 
> Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
> Cc: Chen Peter-B29397 <B29397@freescale.com>
> Cc: Detlev Zundel <dzu@denx.de>
> Cc: Fabio Estevam <festevam@gmail.com>
> Cc: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
> Cc: Li Frank-B20596 <B20596@freescale.com>
> Cc: Lin Tony-B19295 <B19295@freescale.com>
> Cc: Linux FBDEV <linux-fbdev@vger.kernel.org>
> Cc: Sascha Hauer <s.hauer@pengutronix.de>
> Cc: Shawn Guo <shawn.guo@freescale.com>
> Cc: Shawn Guo <shawn.guo@linaro.org>
> Cc: Stefano Babic <sbabic@denx.de>
> Cc: Subodh Nijsure <snijsure@grid-net.com>
> Cc: Tony Lin <tony.lin@freescale.com>
> Cc: Wolfgang Denk <wd@denx.de>
> Acked-by: Shawn Guo <shawn.guo@linaro.org>
> Acked-by: Wolfgang Denk <wd@denx.de>
> Acked-by: Wolfram Sang <w.sang@pengutronix.de>
> Tested-by: Wolfgang Denk <wd@denx.de>

Applied.


Thanks,

Florian Tobias Schandinat

> ---
>  drivers/video/mxsfb.c |   13 +++++++++++++
>  1 file changed, 13 insertions(+)
> 
> V2: Make shutdown() call static
> 
> diff --git a/drivers/video/mxsfb.c b/drivers/video/mxsfb.c
> index 4a89f88..dcf29bf 100644
> --- a/drivers/video/mxsfb.c
> +++ b/drivers/video/mxsfb.c
> @@ -880,6 +880,18 @@ static int __devexit mxsfb_remove(struct platform_device *pdev)
>  	return 0;
>  }
>  
> +static void mxsfb_shutdown(struct platform_device *pdev)
> +{
> +	struct fb_info *fb_info = platform_get_drvdata(pdev);
> +	struct mxsfb_info *host = to_imxfb_host(fb_info);
> +
> +	/*
> +	 * Force stop the LCD controller as keeping it running during reboot
> +	 * might interfere with the BootROM's boot mode pads sampling.
> +	 */
> +	writel(CTRL_RUN, host->base + LCDC_CTRL + REG_CLR);
> +}
> +
>  static struct platform_device_id mxsfb_devtype[] = {
>  	{
>  		.name = "imx23-fb",
> @@ -896,6 +908,7 @@ MODULE_DEVICE_TABLE(platform, mxsfb_devtype);
>  static struct platform_driver mxsfb_driver = {
>  	.probe = mxsfb_probe,
>  	.remove = __devexit_p(mxsfb_remove),
> +	.shutdown = mxsfb_shutdown,
>  	.id_table = mxsfb_devtype,
>  	.driver = {
>  		   .name = DRIVER_NAME,

[PATCH] i.MX28: Shut down the LCD controller to avoid bootrom sampling bug

[Marek Vasut]

Dear Wolfram Sang,

> > > Quite a CC list, but you forgot the main ones:
> > Do you have a trimmed-down version of the list of mxs-related people
> > possibly?
> 
> I usually CC Shawn, alkml and the driver authors and lists. There is
> nothing wrong with having more, you just happen to miss the crucial
> ones here. 'scripts/get_maintainers.pl' may also be helpful.

A'ight, time for a resend.

> 
> > > FRAMEBUFFER LAYER
> > > M:      Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
> > > L:      linux-fbdev at vger.kernel.org
> > > 
> > > Patch itself looks good
> > 
> > Who's applying this? The fbdev people or imx tree?
> 
> It is in drivers/video, so it should go via fbdev.

Right, thanks!

Best regards,
Marek Vasut

[PATCH] i.MX28: Shut down the LCD controller to avoid bootrom sampling bug

[Wolfram Sang]

> > Quite a CC list, but you forgot the main ones:
> 
> Do you have a trimmed-down version of the list of mxs-related people possibly?

I usually CC Shawn, alkml and the driver authors and lists. There is
nothing wrong with having more, you just happen to miss the crucial
ones here. 'scripts/get_maintainers.pl' may also be helpful.

> > 
> > FRAMEBUFFER LAYER
> > M:      Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
> > L:      linux-fbdev at vger.kernel.org
> > 
> > Patch itself looks good
> 
> Who's applying this? The fbdev people or imx tree?

It is in drivers/video, so it should go via fbdev.

-- 
Pengutronix e.K.                           | Wolfram Sang                |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |
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[PATCH] i.MX28: Shut down the LCD controller to avoid bootrom sampling bug

[Marek Vasut]

Dear Sergei Shtylyov,

> Hello.
> 
> On 04/17/2012 07:07 PM, Marek Vasut wrote:
> > From: Marek Vasut<marek.vasut@gmail.com>
> > 
> > Signed-off-by: Marek Vasut<marek.vasut@gmail.com>
> > Cc: Chen Peter-B29397<B29397@freescale.com>
> > Cc: Detlev Zundel<dzu@denx.de>
> > Cc: Fabio Estevam<festevam@gmail.com>
> > Cc: Li Frank-B20596<B20596@freescale.com>
> > Cc: Lin Tony-B19295<B19295@freescale.com>
> > Cc: Linux USB<linux-usb@vger.kernel.org>
> > Cc: Sascha Hauer<s.hauer@pengutronix.de>
> > Cc: Shawn Guo<shawn.guo@freescale.com>
> > Cc: Shawn Guo<shawn.guo@linaro.org>
> > Cc: Stefano Babic<sbabic@denx.de>
> > Cc: Subodh Nijsure<snijsure@grid-net.com>
> > Cc: Tony Lin<tony.lin@freescale.com>
> > Cc: Wolfgang Denk<wd@denx.de>
> > ---
> > 
> >   drivers/video/mxsfb.c |   13 +++++++++++++
> >   1 file changed, 13 insertions(+)
> 
>     Why post this to linux-usb?

Copy-paste mistake

> 
> WBR, Sergei

Best regards,
Marek Vasut

[PATCH] i.MX28: Shut down the LCD controller to avoid bootrom sampling bug

[Marek Vasut]

Dear Wolfram Sang,

> On Tue, Apr 17, 2012 at 05:07:41PM +0200, Marek Vasut wrote:
> > From: Marek Vasut <marek.vasut@gmail.com>
> > 
> > Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
> > Cc: Chen Peter-B29397 <B29397@freescale.com>
> > Cc: Detlev Zundel <dzu@denx.de>
> > Cc: Fabio Estevam <festevam@gmail.com>
> > Cc: Li Frank-B20596 <B20596@freescale.com>
> > Cc: Lin Tony-B19295 <B19295@freescale.com>
> > Cc: Linux USB <linux-usb@vger.kernel.org>
> > Cc: Sascha Hauer <s.hauer@pengutronix.de>
> > Cc: Shawn Guo <shawn.guo@freescale.com>
> > Cc: Shawn Guo <shawn.guo@linaro.org>
> > Cc: Stefano Babic <sbabic@denx.de>
> > Cc: Subodh Nijsure <snijsure@grid-net.com>
> > Cc: Tony Lin <tony.lin@freescale.com>
> > Cc: Wolfgang Denk <wd@denx.de>
> 
> Quite a CC list, but you forgot the main ones:

Do you have a trimmed-down version of the list of mxs-related people possibly?

> 
> FRAMEBUFFER LAYER
> M:      Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
> L:      linux-fbdev at vger.kernel.org
> 
> Patch itself looks good

Who's applying this? The fbdev people or imx tree?

> 
> Acked-by: Wolfram Sang <w.sang@pengutronix.de>

Best regards,
Marek Vasut

[PATCH] i.MX28: Shut down the LCD controller to avoid bootrom sampling bug

[Wolfram Sang]

On Tue, Apr 17, 2012 at 05:07:41PM +0200, Marek Vasut wrote:
> From: Marek Vasut <marek.vasut@gmail.com>
> 
> Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
> Cc: Chen Peter-B29397 <B29397@freescale.com>
> Cc: Detlev Zundel <dzu@denx.de>
> Cc: Fabio Estevam <festevam@gmail.com>
> Cc: Li Frank-B20596 <B20596@freescale.com>
> Cc: Lin Tony-B19295 <B19295@freescale.com>
> Cc: Linux USB <linux-usb@vger.kernel.org>
> Cc: Sascha Hauer <s.hauer@pengutronix.de>
> Cc: Shawn Guo <shawn.guo@freescale.com>
> Cc: Shawn Guo <shawn.guo@linaro.org>
> Cc: Stefano Babic <sbabic@denx.de>
> Cc: Subodh Nijsure <snijsure@grid-net.com>
> Cc: Tony Lin <tony.lin@freescale.com>
> Cc: Wolfgang Denk <wd@denx.de>

Quite a CC list, but you forgot the main ones:

FRAMEBUFFER LAYER
M:      Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
L:      linux-fbdev at vger.kernel.org

Patch itself looks good

Acked-by: Wolfram Sang <w.sang@pengutronix.de>

-- 
Pengutronix e.K.                           | Wolfram Sang                |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |
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[PATCH] i.MX28: Shut down the LCD controller to avoid bootrom sampling bug

[Sergei Shtylyov]

Hello.

On 04/17/2012 07:07 PM, Marek Vasut wrote:

> From: Marek Vasut<marek.vasut@gmail.com>

> Signed-off-by: Marek Vasut<marek.vasut@gmail.com>
> Cc: Chen Peter-B29397<B29397@freescale.com>
> Cc: Detlev Zundel<dzu@denx.de>
> Cc: Fabio Estevam<festevam@gmail.com>
> Cc: Li Frank-B20596<B20596@freescale.com>
> Cc: Lin Tony-B19295<B19295@freescale.com>
> Cc: Linux USB<linux-usb@vger.kernel.org>
> Cc: Sascha Hauer<s.hauer@pengutronix.de>
> Cc: Shawn Guo<shawn.guo@freescale.com>
> Cc: Shawn Guo<shawn.guo@linaro.org>
> Cc: Stefano Babic<sbabic@denx.de>
> Cc: Subodh Nijsure<snijsure@grid-net.com>
> Cc: Tony Lin<tony.lin@freescale.com>
> Cc: Wolfgang Denk<wd@denx.de>
> ---
>   drivers/video/mxsfb.c |   13 +++++++++++++
>   1 file changed, 13 insertions(+)

    Why post this to linux-usb?

WBR, Sergei

[PATCH] i.MX28: Shut down the LCD controller to avoid bootrom sampling bug

[Marek Vasut]

From: Marek Vasut <marek.vasut@gmail.com>

Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
Cc: Chen Peter-B29397 <B29397@freescale.com>
Cc: Detlev Zundel <dzu@denx.de>
Cc: Fabio Estevam <festevam@gmail.com>
Cc: Li Frank-B20596 <B20596@freescale.com>
Cc: Lin Tony-B19295 <B19295@freescale.com>
Cc: Linux USB <linux-usb@vger.kernel.org>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Shawn Guo <shawn.guo@freescale.com>
Cc: Shawn Guo <shawn.guo@linaro.org>
Cc: Stefano Babic <sbabic@denx.de>
Cc: Subodh Nijsure <snijsure@grid-net.com>
Cc: Tony Lin <tony.lin@freescale.com>
Cc: Wolfgang Denk <wd@denx.de>
---
 drivers/video/mxsfb.c |   13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/drivers/video/mxsfb.c b/drivers/video/mxsfb.c
index 4a89f88..a265356 100644
--- a/drivers/video/mxsfb.c
+++ b/drivers/video/mxsfb.c
@@ -880,6 +880,18 @@ static int __devexit mxsfb_remove(struct platform_device *pdev)
 	return 0;
 }
 
+void mxsfb_shutdown(struct platform_device *pdev)
+{
+	struct fb_info *fb_info = platform_get_drvdata(pdev);
+	struct mxsfb_info *host = to_imxfb_host(fb_info);
+
+	/*
+	 * Force stop the LCD controller as keeping it running during reboot
+	 * might interfere with the BootROM's boot mode pads sampling.
+	 */
+	writel(CTRL_RUN, host->base + LCDC_CTRL + REG_CLR);
+}
+
 static struct platform_device_id mxsfb_devtype[] = {
 	{
 		.name = "imx23-fb",
@@ -896,6 +908,7 @@ MODULE_DEVICE_TABLE(platform, mxsfb_devtype);
 static struct platform_driver mxsfb_driver = {
 	.probe = mxsfb_probe,
 	.remove = __devexit_p(mxsfb_remove),
+	.shutdown = mxsfb_shutdown,
 	.id_table = mxsfb_devtype,
 	.driver = {
 		   .name = DRIVER_NAME,
-- 
1.7.9.5