From: Anusha Srivatsa <anusha.srivatsa@intel.com>
Date: Thu, 11 Jan 2018 16:00:06 -0200
Subject: drm/i915/icp: Get/set proper Raw clock frequency on ICP
Git-commit: 4ef99abd07ef3ceb014b4359ec4a977d7ae8a8f9
Patch-mainline: v4.17-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166
Add register definitions for setting the rawclock.
Set the numerator,denominator and divider values.
v2: Simplify the commit message. Simplify the math.
Add register bits for numerator. (Paulo)
v3 (from Paulo): coding style bikesheds.
Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Anusha Srivatsa <anusha.srivatsa@intel.com>
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180111180010.24357-5-paulo.r.zanoni@intel.com
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
drivers/gpu/drm/i915/i915_reg.h | 2 ++
drivers/gpu/drm/i915/intel_cdclk.c | 29 +++++++++++++++++++++++++++--
2 files changed, 29 insertions(+), 2 deletions(-)
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -7351,6 +7351,8 @@ enum {
#define CNP_RAWCLK_DIV(div) ((div) << 16)
#define CNP_RAWCLK_FRAC_MASK (0xf << 26)
#define CNP_RAWCLK_FRAC(frac) ((frac) << 26)
+#define ICP_RAWCLK_DEN(den) ((den) << 26)
+#define ICP_RAWCLK_NUM(num) ((num) << 11)
#define PCH_DPLL_TMR_CFG _MMIO(0xc6208)
--- a/drivers/gpu/drm/i915/intel_cdclk.c
+++ b/drivers/gpu/drm/i915/intel_cdclk.c
@@ -2355,6 +2355,30 @@ static int cnp_rawclk(struct drm_i915_pr
return divider + fraction;
}
+static int icp_rawclk(struct drm_i915_private *dev_priv)
+{
+ u32 rawclk;
+ int divider, numerator, denominator, frequency;
+
+ if (I915_READ(SFUSE_STRAP) & SFUSE_STRAP_RAW_FREQUENCY) {
+ frequency = 24000;
+ divider = 23;
+ numerator = 0;
+ denominator = 0;
+ } else {
+ frequency = 19200;
+ divider = 18;
+ numerator = 1;
+ denominator = 4;
+ }
+
+ rawclk = CNP_RAWCLK_DIV(divider) | ICP_RAWCLK_NUM(numerator) |
+ ICP_RAWCLK_DEN(denominator);
+
+ I915_WRITE(PCH_RAWCLK_FREQ, rawclk);
+ return frequency;
+}
+
static int pch_rawclk(struct drm_i915_private *dev_priv)
{
return (I915_READ(PCH_RAWCLK_FREQ) & RAWCLK_FREQ_MASK) * 1000;
@@ -2402,8 +2426,9 @@ static int g4x_hrawclk(struct drm_i915_p
*/
void intel_update_rawclk(struct drm_i915_private *dev_priv)
{
-
- if (HAS_PCH_CNP(dev_priv))
+ if (HAS_PCH_ICP(dev_priv))
+ dev_priv->rawclk_freq = icp_rawclk(dev_priv);
+ else if (HAS_PCH_CNP(dev_priv))
dev_priv->rawclk_freq = cnp_rawclk(dev_priv);
else if (HAS_PCH_SPLIT(dev_priv))
dev_priv->rawclk_freq = pch_rawclk(dev_priv);