Geminilake has the same register layout, reference clock and programming
sequence as broxton. The difference is that it doesn't support the 1.5
divider and has different ratios, but a lot of code can be shared
between the two platforms.
v2: Rebase (s/broxton/bxt).
v3: Fix vco calculation in glk_de_pll_vco().
Signed-off-by: Ander Conselvan de Oliveira
<ander.conselvan.de.olive...@intel.com>
---
drivers/gpu/drm/i915/intel_display.c | 73 ++++++++++++++++++++++++++++++++----
1 file changed, 65 insertions(+), 8 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_display.c
b/drivers/gpu/drm/i915/intel_display.c
index 4069a6e..62cc390 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -124,6 +124,7 @@ static void ironlake_pfit_enable(struct intel_crtc *crtc);
static void intel_modeset_setup_hw_state(struct drm_device *dev);
static void intel_pre_disable_primary_noatomic(struct drm_crtc *crtc);
static int ilk_max_pixel_rate(struct drm_atomic_state *state);
+static int glk_calc_cdclk(int max_pixclk);
static int bxt_calc_cdclk(int max_pixclk);
struct intel_limit {
@@ -5866,6 +5867,8 @@ static void intel_update_max_cdclk(struct
drm_i915_private *dev_priv)
max_cdclk = 308571;
dev_priv->max_cdclk_freq = skl_calc_cdclk(max_cdclk, vco);
+ } else if (IS_GEMINILAKE(dev_priv)) {
+ dev_priv->max_cdclk_freq = 316800;
} else if (IS_BROXTON(dev_priv)) {
dev_priv->max_cdclk_freq = 624000;
} else if (IS_BROADWELL(dev_priv)) {
@@ -5953,6 +5956,26 @@ static int bxt_de_pll_vco(struct drm_i915_private
*dev_priv, int cdclk)
return dev_priv->cdclk_pll.ref * ratio;
}
+static int glk_de_pll_vco(struct drm_i915_private *dev_priv, int cdclk)
+{
+ int ratio;
+
+ if (cdclk == dev_priv->cdclk_pll.ref)
+ return 0;
+
+ switch (cdclk) {
+ default:
+ MISSING_CASE(cdclk);
+ case 79200:
+ case 158400:
+ case 316800:
+ ratio = 33;
+ break;
+ }
+
+ return dev_priv->cdclk_pll.ref * ratio;
+}
+
static void bxt_de_pll_disable(struct drm_i915_private *dev_priv)
{
I915_WRITE(BXT_DE_PLL_ENABLE, 0);
@@ -5994,7 +6017,10 @@ static void bxt_set_cdclk(struct drm_i915_private
*dev_priv, int cdclk)
u32 val, divider;
int vco, ret;
- vco = bxt_de_pll_vco(dev_priv, cdclk);
+ if (IS_GEMINILAKE(dev_priv))
+ vco = glk_de_pll_vco(dev_priv, cdclk);
+ else
+ vco = bxt_de_pll_vco(dev_priv, cdclk);
DRM_DEBUG_DRIVER("Changing CDCLK to %d kHz (VCO %d kHz)\n", cdclk, vco);
@@ -6007,6 +6033,7 @@ static void bxt_set_cdclk(struct drm_i915_private
*dev_priv, int cdclk)
divider = BXT_CDCLK_CD2X_DIV_SEL_2;
break;
case 3:
+ WARN(IS_GEMINILAKE(dev_priv), "Unsupported divider\n");
divider = BXT_CDCLK_CD2X_DIV_SEL_1_5;
break;
case 2:
@@ -6116,6 +6143,8 @@ static void bxt_sanitize_cdclk(struct drm_i915_private
*dev_priv)
void bxt_init_cdclk(struct drm_i915_private *dev_priv)
{
+ int cdclk;
+
bxt_sanitize_cdclk(dev_priv);
if (dev_priv->cdclk_freq != 0 && dev_priv->cdclk_pll.vco != 0)
@@ -6126,7 +6155,12 @@ void bxt_init_cdclk(struct drm_i915_private *dev_priv)
* - The initial CDCLK needs to be read from VBT.
* Need to make this change after VBT has changes for BXT.
*/
- bxt_set_cdclk(dev_priv, bxt_calc_cdclk(0));
+ if (IS_GEMINILAKE(dev_priv))
+ cdclk = glk_calc_cdclk(0);
+ else
+ cdclk = bxt_calc_cdclk(0);
+
+ bxt_set_cdclk(dev_priv, cdclk);
}
void bxt_uninit_cdclk(struct drm_i915_private *dev_priv)
@@ -6552,6 +6586,16 @@ static int valleyview_calc_cdclk(struct drm_i915_private
*dev_priv,
return 200000;
}
+static int glk_calc_cdclk(int max_pixclk)
+{
+ if (max_pixclk > 158400)
+ return 316800;
+ else if (max_pixclk > 79200)
+ return 158400;
+ else
+ return 79200;
+}
+
static int bxt_calc_cdclk(int max_pixclk)
{
if (max_pixclk > 576000)
@@ -6614,15 +6658,27 @@ static int valleyview_modeset_calc_cdclk(struct
drm_atomic_state *state)
static int bxt_modeset_calc_cdclk(struct drm_atomic_state *state)
{
+ struct drm_i915_private *dev_priv = to_i915(state->dev);
int max_pixclk = ilk_max_pixel_rate(state);
struct intel_atomic_state *intel_state =
to_intel_atomic_state(state);
+ int cdclk;
- intel_state->cdclk = intel_state->dev_cdclk =
- bxt_calc_cdclk(max_pixclk);
+ if (IS_GEMINILAKE(dev_priv))
+ cdclk = glk_calc_cdclk(max_pixclk);
+ else
+ cdclk = bxt_calc_cdclk(max_pixclk);
- if (!intel_state->active_crtcs)
- intel_state->dev_cdclk = bxt_calc_cdclk(0);
+ intel_state->cdclk = intel_state->dev_cdclk = cdclk;
+
+ if (!intel_state->active_crtcs) {
+ if (IS_GEMINILAKE(dev_priv))
+ cdclk = glk_calc_cdclk(0);
+ else
+ cdclk = bxt_calc_cdclk(0);
+
+ intel_state->dev_cdclk = cdclk;
+ }
return 0;
}
@@ -7324,6 +7380,7 @@ static int broxton_get_display_clock_speed(struct
drm_i915_private *dev_priv)
div = 2;
break;
case BXT_CDCLK_CD2X_DIV_SEL_1_5:
+ WARN(IS_GEMINILAKE(dev_priv), "Unsupported divider\n");
div = 3;
break;
case BXT_CDCLK_CD2X_DIV_SEL_2:
@@ -16022,7 +16079,7 @@ void intel_init_display_hooks(struct drm_i915_private
*dev_priv)
if (IS_SKYLAKE(dev_priv) || IS_KABYLAKE(dev_priv))
dev_priv->display.get_display_clock_speed =
skylake_get_display_clock_speed;
- else if (IS_BROXTON(dev_priv))
+ else if (IS_GEN9_LP(dev_priv))
dev_priv->display.get_display_clock_speed =
broxton_get_display_clock_speed;
else if (IS_BROADWELL(dev_priv))
@@ -16095,7 +16152,7 @@ void intel_init_display_hooks(struct drm_i915_private
*dev_priv)
valleyview_modeset_commit_cdclk;
dev_priv->display.modeset_calc_cdclk =
valleyview_modeset_calc_cdclk;
- } else if (IS_BROXTON(dev_priv)) {
+ } else if (IS_GEN9_LP(dev_priv)) {
dev_priv->display.modeset_commit_cdclk =
bxt_modeset_commit_cdclk;
dev_priv->display.modeset_calc_cdclk =
--
2.5.5
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