[PATCH 2/5] drm/i915/bxt: add missing DDI PLL registers to the state checking

Imre Deak
2015-06-18T14:27:26Z

Although we have a fixed setting for the PLL9 and EBB4 registers, it
still makes sense to check them together with the rest of PLL registers.

While at it also remove a redundant comment about 10 bit clock enabling.

Signed-off-by: Imre Deak <imre.deak@intel.com>
---
drivers/gpu/drm/i915/i915_drv.h | 3 ++-
drivers/gpu/drm/i915/i915_reg.h | 3 ++-
drivers/gpu/drm/i915/intel_ddi.c | 16 +++++++++++++---
drivers/gpu/drm/i915/intel_display.c | 6 ++++--
4 files changed, 21 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 491ef0c..bf235ff 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -366,7 +366,8 @@ struct intel_dpll_hw_state {
uint32_t cfgcr1, cfgcr2;

/* bxt */
- uint32_t ebb0, pll0, pll1, pll2, pll3, pll6, pll8, pll10, pcsdw12;
+ uint32_t ebb0, ebb4, pll0, pll1, pll2, pll3, pll6, pll8, pll9, pll10,
+ pcsdw12;
};

struct intel_shared_dpll_config {
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 4bbc85a..bba0691 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -1207,7 +1207,8 @@ enum skl_disp_power_wells {
/* PORT_PLL_8_A */
#define PORT_PLL_TARGET_CNT_MASK 0x3FF
/* PORT_PLL_9_A */
-#define PORT_PLL_LOCK_THRESHOLD_MASK 0xe
+#define PORT_PLL_LOCK_THRESHOLD_SHIFT 1
+#define PORT_PLL_LOCK_THRESHOLD_MASK (0x7 << PORT_PLL_LOCK_THRESHOLD_SHIFT)
/* PORT_PLL_10_A */
#define PORT_PLL_DCO_AMP_OVR_EN_H (1<<27)
#define PORT_PLL_DCO_AMP_MASK 0x3c00
diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
index bdc5677..ca970ba 100644
--- a/drivers/gpu/drm/i915/intel_ddi.c
+++ b/drivers/gpu/drm/i915/intel_ddi.c
@@ -1476,11 +1476,15 @@ bxt_ddi_pll_select(struct intel_crtc *intel_crtc,

crtc_state->dpll_hw_state.pll8 = targ_cnt;

+ crtc_state->dpll_hw_state.pll9 = 5 << PORT_PLL_LOCK_THRESHOLD_SHIFT;
+
if (dcoampovr_en_h)
crtc_state->dpll_hw_state.pll10 = PORT_PLL_DCO_AMP_OVR_EN_H;

crtc_state->dpll_hw_state.pll10 |= PORT_PLL_DCO_AMP(dco_amp);

+ crtc_state->dpll_hw_state.ebb4 = PORT_PLL_10BIT_CLK_ENABLE;
+
crtc_state->dpll_hw_state.pcsdw12 =
LANESTAGGER_STRAP_OVRD | lanestagger;

@@ -2414,7 +2418,7 @@ static void bxt_ddi_pll_enable(struct drm_i915_private *dev_priv,

temp = I915_READ(BXT_PORT_PLL(port, 9));
temp &= ~PORT_PLL_LOCK_THRESHOLD_MASK;
- temp |= (5 << 1);
+ temp |= pll->config.hw_state.pll9;
I915_WRITE(BXT_PORT_PLL(port, 9), temp);

temp = I915_READ(BXT_PORT_PLL(port, 10));
@@ -2427,8 +2431,8 @@ static void bxt_ddi_pll_enable(struct drm_i915_private *dev_priv,
temp = I915_READ(BXT_PORT_PLL_EBB_4(port));
temp |= PORT_PLL_RECALIBRATE;
I915_WRITE(BXT_PORT_PLL_EBB_4(port), temp);
- /* Enable 10 bit clock */
- temp |= PORT_PLL_10BIT_CLK_ENABLE;
+ temp &= ~PORT_PLL_10BIT_CLK_ENABLE;
+ temp |= pll->config.hw_state.ebb4;
I915_WRITE(BXT_PORT_PLL_EBB_4(port), temp);

/* Enable PLL */
@@ -2481,6 +2485,9 @@ static bool bxt_ddi_pll_get_hw_state(struct drm_i915_private *dev_priv,
hw_state->ebb0 = I915_READ(BXT_PORT_PLL_EBB_0(port));
hw_state->ebb0 &= PORT_PLL_P1_MASK | PORT_PLL_P2_MASK;

+ hw_state->ebb4 = I915_READ(BXT_PORT_PLL_EBB_4(port));
+ hw_state->ebb4 &= PORT_PLL_10BIT_CLK_ENABLE;
+
hw_state->pll0 = I915_READ(BXT_PORT_PLL(port, 0));
hw_state->pll0 &= PORT_PLL_M2_MASK;

@@ -2501,6 +2508,9 @@ static bool bxt_ddi_pll_get_hw_state(struct drm_i915_private *dev_priv,
hw_state->pll8 = I915_READ(BXT_PORT_PLL(port, 8));
hw_state->pll8 &= PORT_PLL_TARGET_CNT_MASK;

+ hw_state->pll9 = I915_READ(BXT_PORT_PLL(port, 9));
+ hw_state->pll9 &= PORT_PLL_LOCK_THRESHOLD_MASK;
+
hw_state->pll10 = I915_READ(BXT_PORT_PLL(port, 10));
hw_state->pll10 &= PORT_PLL_DCO_AMP_OVR_EN_H |
PORT_PLL_DCO_AMP_MASK;
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 9149410..6f79680 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -11905,17 +11905,19 @@ static void intel_dump_pipe_config(struct intel_crtc *crtc,
DRM_DEBUG_KMS("double wide: %i\n", pipe_config->double_wide);

if (IS_BROXTON(dev)) {
- DRM_DEBUG_KMS("ddi_pll_sel: %u; dpll_hw_state: ebb0: 0x%x, "
+ DRM_DEBUG_KMS("ddi_pll_sel: %u; dpll_hw_state: ebb0: 0x%x, ebb4: 0x%x,"
"pll0: 0x%x, pll1: 0x%x, pll2: 0x%x, pll3: 0x%x, "
- "pll6: 0x%x, pll8: 0x%x, pcsdw12: 0x%x\n",
+ "pll6: 0x%x, pll8: 0x%x, pll9: 0x%x, pcsdw12: 0x%x\n",
pipe_config->ddi_pll_sel,
pipe_config->dpll_hw_state.ebb0,
+ pipe_config->dpll_hw_state.ebb4,
pipe_config->dpll_hw_state.pll0,
pipe_config->dpll_hw_state.pll1,
pipe_config->dpll_hw_state.pll2,
pipe_config->dpll_hw_state.pll3,
pipe_config->dpll_hw_state.pll6,
pipe_config->dpll_hw_state.pll8,
+ pipe_config->dpll_hw_state.pll9,
pipe_config->dpll_hw_state.pcsdw12);
} else if (IS_SKYLAKE(dev)) {
DRM_DEBUG_KMS("ddi_pll_sel: %u; dpll_hw_state: "
--
2.1.4