diff mbox series

[11/13] drm/i915: Fix readout for cnl DPLL kdiv==3

Message ID 20190207173230.22368-11-ville.syrjala@linux.intel.com (mailing list archive)
State New, archived
Headers show
Series [01/13] drm/i915: Don't pass crtc to intel_find_shared_dpll() | expand

Commit Message

Ville Syrjälä Feb. 7, 2019, 5:32 p.m. UTC
From: Ville Syrjälä <ville.syrjala@linux.intel.com>

The readout code thinks that kdiv of 3 is 4. Fix it.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
---
 drivers/gpu/drm/i915/i915_reg.h  | 2 +-
 drivers/gpu/drm/i915/intel_ddi.c | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

Comments

Lucas De Marchi Feb. 7, 2019, 10:48 p.m. UTC | #1
On Thu, Feb 7, 2019 at 9:33 AM Ville Syrjala
<ville.syrjala@linux.intel.com> wrote:
>
> From: Ville Syrjälä <ville.syrjala@linux.intel.com>
>
> The readout code thinks that kdiv of 3 is 4. Fix it.
>
> Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
> ---
>  drivers/gpu/drm/i915/i915_reg.h  | 2 +-
>  drivers/gpu/drm/i915/intel_ddi.c | 4 ++--
>  2 files changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
> index 638a586469f9..f8c15148927a 100644
> --- a/drivers/gpu/drm/i915/i915_reg.h
> +++ b/drivers/gpu/drm/i915/i915_reg.h
> @@ -9741,7 +9741,7 @@ enum skl_power_gate {
>  #define  DPLL_CFGCR1_KDIV(x)           ((x) << 6)
>  #define  DPLL_CFGCR1_KDIV_1            (1 << 6)
>  #define  DPLL_CFGCR1_KDIV_2            (2 << 6)
> -#define  DPLL_CFGCR1_KDIV_4            (4 << 6)
> +#define  DPLL_CFGCR1_KDIV_3            (4 << 6)
>  #define  DPLL_CFGCR1_PDIV_MASK         (0xf << 2)
>  #define  DPLL_CFGCR1_PDIV_SHIFT                (2)
>  #define  DPLL_CFGCR1_PDIV(x)           ((x) << 2)
> diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
> index ca705546a0ab..fd192baf93b2 100644
> --- a/drivers/gpu/drm/i915/intel_ddi.c
> +++ b/drivers/gpu/drm/i915/intel_ddi.c
> @@ -1349,8 +1349,8 @@ int cnl_calc_wrpll_link(struct drm_i915_private *dev_priv,
>         case DPLL_CFGCR1_KDIV_2:
>                 p2 = 2;
>                 break;
> -       case DPLL_CFGCR1_KDIV_4:
> -               p2 = 4;
> +       case DPLL_CFGCR1_KDIV_3:
> +               p2 = 3;

confusing in the spec because kdiv 3 has the value 4. And no idea why
we call it p2
rather than kdiv, that IMO whould make more sense.

Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>

Lucas De Marchi

>                 break;
>         }
>
> --
> 2.19.2
>
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> Intel-gfx mailing list
> Intel-gfx@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/intel-gfx
diff mbox series

Patch

diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 638a586469f9..f8c15148927a 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -9741,7 +9741,7 @@  enum skl_power_gate {
 #define  DPLL_CFGCR1_KDIV(x)		((x) << 6)
 #define  DPLL_CFGCR1_KDIV_1		(1 << 6)
 #define  DPLL_CFGCR1_KDIV_2		(2 << 6)
-#define  DPLL_CFGCR1_KDIV_4		(4 << 6)
+#define  DPLL_CFGCR1_KDIV_3		(4 << 6)
 #define  DPLL_CFGCR1_PDIV_MASK		(0xf << 2)
 #define  DPLL_CFGCR1_PDIV_SHIFT		(2)
 #define  DPLL_CFGCR1_PDIV(x)		((x) << 2)
diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
index ca705546a0ab..fd192baf93b2 100644
--- a/drivers/gpu/drm/i915/intel_ddi.c
+++ b/drivers/gpu/drm/i915/intel_ddi.c
@@ -1349,8 +1349,8 @@  int cnl_calc_wrpll_link(struct drm_i915_private *dev_priv,
 	case DPLL_CFGCR1_KDIV_2:
 		p2 = 2;
 		break;
-	case DPLL_CFGCR1_KDIV_4:
-		p2 = 4;
+	case DPLL_CFGCR1_KDIV_3:
+		p2 = 3;
 		break;
 	}