diff mbox

drm/i915: Don't overclock on Haswell

Message ID 1364085991-20495-1-git-send-email-ben@bwidawsk.net (mailing list archive)
State New, archived
Headers show

Commit Message

Ben Widawsky March 24, 2013, 12:46 a.m. UTC
HSW doesn't overclock the same way as IVB or SNB. I do not know about
VLV, so I've kept that off as well. I'm still working on getting the doc
updates to explain how we overclock on Haswell.

Cc: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
---
 drivers/gpu/drm/i915/intel_pm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Comments

Jesse Barnes March 25, 2013, 2:36 p.m. UTC | #1
On Sat, 23 Mar 2013 17:46:31 -0700
Ben Widawsky <ben@bwidawsk.net> wrote:

> HSW doesn't overclock the same way as IVB or SNB. I do not know about
> VLV, so I've kept that off as well. I'm still working on getting the doc
> updates to explain how we overclock on Haswell.
> 
> Cc: Jesse Barnes <jbarnes@virtuousgeek.org>
> Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
> ---
>  drivers/gpu/drm/i915/intel_pm.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
> index ce3db2c..9c11dd9 100644
> --- a/drivers/gpu/drm/i915/intel_pm.c
> +++ b/drivers/gpu/drm/i915/intel_pm.c
> @@ -2628,7 +2628,7 @@ static void gen6_enable_rps(struct drm_device *dev)
>  		   (IS_HASWELL(dev) ? GEN7_RP_DOWN_IDLE_AVG : GEN6_RP_DOWN_IDLE_CONT));
>  
>  	ret = sandybridge_pcode_write(dev_priv, GEN6_PCODE_WRITE_MIN_FREQ_TABLE, 0);
> -	if (!ret) {
> +	if (!ret && IS_GEN6(dev) || IS_IVYBRIDGE(dev)) {
>  		pcu_mbox = 0;
>  		ret = sandybridge_pcode_read(dev_priv, GEN6_READ_OC_PARAMS, &pcu_mbox);
>  		if (!ret && (pcu_mbox & (1<<31))) { /* OC supported */

This won't affect VLV, since I have a new rps enable function in my
latest set.  But it looks fine.

Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Daniel Vetter March 25, 2013, 3:38 p.m. UTC | #2
On Mon, Mar 25, 2013 at 07:36:51AM -0700, Jesse Barnes wrote:
> On Sat, 23 Mar 2013 17:46:31 -0700
> Ben Widawsky <ben@bwidawsk.net> wrote:
> 
> > HSW doesn't overclock the same way as IVB or SNB. I do not know about
> > VLV, so I've kept that off as well. I'm still working on getting the doc
> > updates to explain how we overclock on Haswell.
> > 
> > Cc: Jesse Barnes <jbarnes@virtuousgeek.org>
> > Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
> > ---
> >  drivers/gpu/drm/i915/intel_pm.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> > 
> > diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
> > index ce3db2c..9c11dd9 100644
> > --- a/drivers/gpu/drm/i915/intel_pm.c
> > +++ b/drivers/gpu/drm/i915/intel_pm.c
> > @@ -2628,7 +2628,7 @@ static void gen6_enable_rps(struct drm_device *dev)
> >  		   (IS_HASWELL(dev) ? GEN7_RP_DOWN_IDLE_AVG : GEN6_RP_DOWN_IDLE_CONT));
> >  
> >  	ret = sandybridge_pcode_write(dev_priv, GEN6_PCODE_WRITE_MIN_FREQ_TABLE, 0);
> > -	if (!ret) {
> > +	if (!ret && IS_GEN6(dev) || IS_IVYBRIDGE(dev)) {
> >  		pcu_mbox = 0;
> >  		ret = sandybridge_pcode_read(dev_priv, GEN6_READ_OC_PARAMS, &pcu_mbox);
> >  		if (!ret && (pcu_mbox & (1<<31))) { /* OC supported */
> 
> This won't affect VLV, since I have a new rps enable function in my
> latest set.  But it looks fine.
> 
> Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Queued for -next, thanks for the patch.
-Daniel
diff mbox

Patch

diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index ce3db2c..9c11dd9 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -2628,7 +2628,7 @@  static void gen6_enable_rps(struct drm_device *dev)
 		   (IS_HASWELL(dev) ? GEN7_RP_DOWN_IDLE_AVG : GEN6_RP_DOWN_IDLE_CONT));
 
 	ret = sandybridge_pcode_write(dev_priv, GEN6_PCODE_WRITE_MIN_FREQ_TABLE, 0);
-	if (!ret) {
+	if (!ret && IS_GEN6(dev) || IS_IVYBRIDGE(dev)) {
 		pcu_mbox = 0;
 		ret = sandybridge_pcode_read(dev_priv, GEN6_READ_OC_PARAMS, &pcu_mbox);
 		if (!ret && (pcu_mbox & (1<<31))) { /* OC supported */