| Message ID | 1310387754-23033-1-git-send-email-laurent.pinchart@ideasonboard.com (mailing list archive) |
|---|---|
| State | Not Applicable |
| Headers | show |
On Mon, 11 Jul 2011, Laurent Pinchart wrote: > Resuming from runtime PM restores all LCDC registers. If the dot clock > is off at that time display panning information will be corrupted. > > Turn the dot clock on before resuming from runtime PM. Similarly, > turn the clock off after suspending the LCDC. > > Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> > Cc: Magnus Damm <magnus.damm@gmail.com> > Cc: Damian Hobson-Garcia <dhobsong@igel.co.jp> (testing would have been a bit easier, if prerequisites had been specified in the patch;)) Tested-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Thanks Guennadi > --- > drivers/video/sh_mobile_lcdcfb.c | 6 +++--- > 1 files changed, 3 insertions(+), 3 deletions(-) > > This patch should fix the LCDC panning issue caused by runtime suspend. It > applies on top of Rafael J. Wysocki's pm-domains branch and Damian > Hobson-Garcia's MERAM patches. > > diff --git a/drivers/video/sh_mobile_lcdcfb.c b/drivers/video/sh_mobile_lcdcfb.c > index 48a40e3..e9b80bc 100644 > --- a/drivers/video/sh_mobile_lcdcfb.c > +++ b/drivers/video/sh_mobile_lcdcfb.c > @@ -256,9 +256,9 @@ struct sh_mobile_lcdc_sys_bus_ops sh_mobile_lcdc_sys_bus_ops = { > static void sh_mobile_lcdc_clk_on(struct sh_mobile_lcdc_priv *priv) > { > if (atomic_inc_and_test(&priv->hw_usecnt)) { > - pm_runtime_get_sync(priv->dev); > if (priv->dot_clk) > clk_enable(priv->dot_clk); > + pm_runtime_get_sync(priv->dev); > if (priv->meram_dev && priv->meram_dev->pdev) > pm_runtime_get_sync(&priv->meram_dev->pdev->dev); > } > @@ -267,11 +267,11 @@ static void sh_mobile_lcdc_clk_on(struct sh_mobile_lcdc_priv *priv) > static void sh_mobile_lcdc_clk_off(struct sh_mobile_lcdc_priv *priv) > { > if (atomic_sub_return(1, &priv->hw_usecnt) == -1) { > - if (priv->dot_clk) > - clk_disable(priv->dot_clk); > if (priv->meram_dev && priv->meram_dev->pdev) > pm_runtime_put_sync(&priv->meram_dev->pdev->dev); > pm_runtime_put(priv->dev); > + if (priv->dot_clk) > + clk_disable(priv->dot_clk); > } > } > > -- > Regards, > > Laurent Pinchart > > -- > To unsubscribe from this list: send the line "unsubscribe linux-sh" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > --- Guennadi Liakhovetski, Ph.D. Freelance Open-Source Software Developer http://www.open-technology.de/ -- To unsubscribe from this list: send the line "unsubscribe linux-sh" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On Tuesday 12 July 2011 11:33:09 Guennadi Liakhovetski wrote: > On Mon, 11 Jul 2011, Laurent Pinchart wrote: > > Resuming from runtime PM restores all LCDC registers. If the dot clock > > is off at that time display panning information will be corrupted. > > > > Turn the dot clock on before resuming from runtime PM. Similarly, > > turn the clock off after suspending the LCDC. > > > > Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> > > Cc: Magnus Damm <magnus.damm@gmail.com> > > Cc: Damian Hobson-Garcia <dhobsong@igel.co.jp> > > (testing would have been a bit easier, if prerequisites had been specified > in the patch;)) They're specified a couple of lines down ;-) > Tested-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Thank you. > > --- > > > > drivers/video/sh_mobile_lcdcfb.c | 6 +++--- > > 1 files changed, 3 insertions(+), 3 deletions(-) > > > > This patch should fix the LCDC panning issue caused by runtime suspend. > > It applies on top of Rafael J. Wysocki's pm-domains branch and Damian > > Hobson-Garcia's MERAM patches. > > > > diff --git a/drivers/video/sh_mobile_lcdcfb.c > > b/drivers/video/sh_mobile_lcdcfb.c index 48a40e3..e9b80bc 100644 > > --- a/drivers/video/sh_mobile_lcdcfb.c > > +++ b/drivers/video/sh_mobile_lcdcfb.c > > @@ -256,9 +256,9 @@ struct sh_mobile_lcdc_sys_bus_ops > > sh_mobile_lcdc_sys_bus_ops = { > > > > static void sh_mobile_lcdc_clk_on(struct sh_mobile_lcdc_priv *priv) > > { > > > > if (atomic_inc_and_test(&priv->hw_usecnt)) { > > > > - pm_runtime_get_sync(priv->dev); > > > > if (priv->dot_clk) > > > > clk_enable(priv->dot_clk); > > > > + pm_runtime_get_sync(priv->dev); > > > > if (priv->meram_dev && priv->meram_dev->pdev) > > > > pm_runtime_get_sync(&priv->meram_dev->pdev->dev); > > > > } > > > > @@ -267,11 +267,11 @@ static void sh_mobile_lcdc_clk_on(struct > > sh_mobile_lcdc_priv *priv) > > > > static void sh_mobile_lcdc_clk_off(struct sh_mobile_lcdc_priv *priv) > > { > > > > if (atomic_sub_return(1, &priv->hw_usecnt) == -1) { > > > > - if (priv->dot_clk) > > - clk_disable(priv->dot_clk); > > > > if (priv->meram_dev && priv->meram_dev->pdev) > > > > pm_runtime_put_sync(&priv->meram_dev->pdev->dev); > > > > pm_runtime_put(priv->dev); > > > > + if (priv->dot_clk) > > + clk_disable(priv->dot_clk); > > > > } > > > > }
On Tue, Jul 12, 2011 at 11:37:57AM +0200, Laurent Pinchart wrote: > On Tuesday 12 July 2011 11:33:09 Guennadi Liakhovetski wrote: > > On Mon, 11 Jul 2011, Laurent Pinchart wrote: > > > Resuming from runtime PM restores all LCDC registers. If the dot clock > > > is off at that time display panning information will be corrupted. > > > > > > Turn the dot clock on before resuming from runtime PM. Similarly, > > > turn the clock off after suspending the LCDC. > > > > > > Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> > > > Cc: Magnus Damm <magnus.damm@gmail.com> > > > Cc: Damian Hobson-Garcia <dhobsong@igel.co.jp> > > > > (testing would have been a bit easier, if prerequisites had been specified > > in the patch;)) > > They're specified a couple of lines down ;-) > > > Tested-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> > > Thank you. > Folded in on top of the rest of the MERAM changes, thanks. -- To unsubscribe from this list: send the line "unsubscribe linux-sh" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/video/sh_mobile_lcdcfb.c b/drivers/video/sh_mobile_lcdcfb.c index 48a40e3..e9b80bc 100644 --- a/drivers/video/sh_mobile_lcdcfb.c +++ b/drivers/video/sh_mobile_lcdcfb.c @@ -256,9 +256,9 @@ struct sh_mobile_lcdc_sys_bus_ops sh_mobile_lcdc_sys_bus_ops = { static void sh_mobile_lcdc_clk_on(struct sh_mobile_lcdc_priv *priv) { if (atomic_inc_and_test(&priv->hw_usecnt)) { - pm_runtime_get_sync(priv->dev); if (priv->dot_clk) clk_enable(priv->dot_clk); + pm_runtime_get_sync(priv->dev); if (priv->meram_dev && priv->meram_dev->pdev) pm_runtime_get_sync(&priv->meram_dev->pdev->dev); } @@ -267,11 +267,11 @@ static void sh_mobile_lcdc_clk_on(struct sh_mobile_lcdc_priv *priv) static void sh_mobile_lcdc_clk_off(struct sh_mobile_lcdc_priv *priv) { if (atomic_sub_return(1, &priv->hw_usecnt) == -1) { - if (priv->dot_clk) - clk_disable(priv->dot_clk); if (priv->meram_dev && priv->meram_dev->pdev) pm_runtime_put_sync(&priv->meram_dev->pdev->dev); pm_runtime_put(priv->dev); + if (priv->dot_clk) + clk_disable(priv->dot_clk); } }
Resuming from runtime PM restores all LCDC registers. If the dot clock is off at that time display panning information will be corrupted. Turn the dot clock on before resuming from runtime PM. Similarly, turn the clock off after suspending the LCDC. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Cc: Magnus Damm <magnus.damm@gmail.com> Cc: Damian Hobson-Garcia <dhobsong@igel.co.jp> --- drivers/video/sh_mobile_lcdcfb.c | 6 +++--- 1 files changed, 3 insertions(+), 3 deletions(-) This patch should fix the LCDC panning issue caused by runtime suspend. It applies on top of Rafael J. Wysocki's pm-domains branch and Damian Hobson-Garcia's MERAM patches.