[Intel-gfx] [PATCH v3 08/15] drm/i915: Use intel_de_rmw() for DDI clock routing
Ville Syrjala
ville.syrjala at linux.intel.com
Fri Feb 5 21:46:27 UTC 2021
From: Ville Syrjälä <ville.syrjala at linux.intel.com>
The DDI clock routing programming is riddled with shared
registers, forcing us to do a lot of RMW. Switch over to
intel_de_rmw() to make that a bit less obnoxious.
Reviewed-by: Lucas De Marchi <lucas.demarchi at intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
---
drivers/gpu/drm/i915/display/intel_ddi.c | 77 +++++++++---------------
1 file changed, 28 insertions(+), 49 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c b/drivers/gpu/drm/i915/display/intel_ddi.c
index d6f94a1e320e..0cb20163fb1f 100644
--- a/drivers/gpu/drm/i915/display/intel_ddi.c
+++ b/drivers/gpu/drm/i915/display/intel_ddi.c
@@ -1603,7 +1603,6 @@ static void dg1_ddi_enable_clock(struct intel_encoder *encoder,
struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
struct intel_shared_dpll *pll = crtc_state->shared_dpll;
enum phy phy = intel_port_to_phy(dev_priv, encoder->port);
- u32 val;
/*
* If we fail this, something went very wrong: first 2 PLLs should be
@@ -1616,17 +1615,12 @@ static void dg1_ddi_enable_clock(struct intel_encoder *encoder,
mutex_lock(&dev_priv->dpll.lock);
- val = intel_de_read(dev_priv, DG1_DPCLKA_CFGCR0(phy));
- drm_WARN_ON(&dev_priv->drm,
- (val & DG1_DPCLKA_CFGCR0_DDI_CLK_OFF(phy)) == 0);
+ intel_de_rmw(dev_priv, DG1_DPCLKA_CFGCR0(phy),
+ DG1_DPCLKA_CFGCR0_DDI_CLK_SEL_MASK(phy),
+ DG1_DPCLKA_CFGCR0_DDI_CLK_SEL(pll->info->id, phy));
- val &= ~DG1_DPCLKA_CFGCR0_DDI_CLK_SEL_MASK(phy);
- val |= DG1_DPCLKA_CFGCR0_DDI_CLK_SEL(pll->info->id, phy);
- intel_de_write(dev_priv, DG1_DPCLKA_CFGCR0(phy), val);
- intel_de_posting_read(dev_priv, DG1_DPCLKA_CFGCR0(phy));
-
- val &= ~DG1_DPCLKA_CFGCR0_DDI_CLK_OFF(phy);
- intel_de_write(dev_priv, DG1_DPCLKA_CFGCR0(phy), val);
+ intel_de_rmw(dev_priv, DG1_DPCLKA_CFGCR0(phy),
+ DG1_DPCLKA_CFGCR0_DDI_CLK_OFF(phy), 0);
mutex_unlock(&dev_priv->dpll.lock);
}
@@ -1638,8 +1632,8 @@ static void dg1_ddi_disable_clock(struct intel_encoder *encoder)
mutex_lock(&dev_priv->dpll.lock);
- intel_de_rmw(dev_priv, DG1_DPCLKA_CFGCR0(phy), 0,
- DG1_DPCLKA_CFGCR0_DDI_CLK_OFF(phy));
+ intel_de_rmw(dev_priv, DG1_DPCLKA_CFGCR0(phy),
+ 0, DG1_DPCLKA_CFGCR0_DDI_CLK_OFF(phy));
mutex_unlock(&dev_priv->dpll.lock);
}
@@ -1650,7 +1644,7 @@ static void icl_ddi_combo_enable_clock(struct intel_encoder *encoder,
struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
struct intel_shared_dpll *pll = crtc_state->shared_dpll;
enum phy phy = intel_port_to_phy(dev_priv, encoder->port);
- u32 val, mask, sel;
+ u32 mask, sel;
i915_reg_t reg;
if (IS_ALDERLAKE_S(dev_priv)) {
@@ -1669,10 +1663,6 @@ static void icl_ddi_combo_enable_clock(struct intel_encoder *encoder,
mutex_lock(&dev_priv->dpll.lock);
- val = intel_de_read(dev_priv, reg);
- drm_WARN_ON(&dev_priv->drm,
- (val & icl_dpclka_cfgcr0_clk_off(dev_priv, phy)) == 0);
-
/*
* Even though this register references DDIs, note that we
* want to pass the PHY rather than the port (DDI). For
@@ -1683,13 +1673,10 @@ static void icl_ddi_combo_enable_clock(struct intel_encoder *encoder,
* Clock Select chooses the PLL for both DDIA and DDID and
* drives port A in all cases."
*/
- val &= ~mask;
- val |= sel;
- intel_de_write(dev_priv, reg, val);
- intel_de_posting_read(dev_priv, reg);
+ intel_de_rmw(dev_priv, reg, mask, sel);
- val &= ~icl_dpclka_cfgcr0_clk_off(dev_priv, phy);
- intel_de_write(dev_priv, reg, val);
+ intel_de_rmw(dev_priv, reg,
+ icl_dpclka_cfgcr0_clk_off(dev_priv, phy), 0);
mutex_unlock(&dev_priv->dpll.lock);
}
@@ -1698,7 +1685,6 @@ static void icl_ddi_combo_disable_clock(struct intel_encoder *encoder)
{
struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
enum phy phy = intel_port_to_phy(dev_priv, encoder->port);
- u32 val;
i915_reg_t reg;
mutex_lock(&dev_priv->dpll.lock);
@@ -1708,10 +1694,10 @@ static void icl_ddi_combo_disable_clock(struct intel_encoder *encoder)
else
reg = ICL_DPCLKA_CFGCR0;
- val = intel_de_read(dev_priv, reg);
- val |= icl_dpclka_cfgcr0_clk_off(dev_priv, phy);
+ mutex_lock(&dev_priv->dpll.lock);
- intel_de_write(dev_priv, reg, val);
+ intel_de_rmw(dev_priv, reg,
+ 0, icl_dpclka_cfgcr0_clk_off(dev_priv, phy));
mutex_unlock(&dev_priv->dpll.lock);
}
@@ -1916,25 +1902,22 @@ static void cnl_ddi_enable_clock(struct intel_encoder *encoder,
struct drm_i915_private *i915 = to_i915(encoder->base.dev);
const struct intel_shared_dpll *pll = crtc_state->shared_dpll;
enum port port = encoder->port;
- u32 val;
if (drm_WARN_ON(&i915->drm, !pll))
return;
mutex_lock(&i915->dpll.lock);
- val = intel_de_read(i915, DPCLKA_CFGCR0);
- val &= ~DPCLKA_CFGCR0_DDI_CLK_SEL_MASK(port);
- val |= DPCLKA_CFGCR0_DDI_CLK_SEL(pll->info->id, port);
- intel_de_write(i915, DPCLKA_CFGCR0, val);
+ intel_de_rmw(i915, DPCLKA_CFGCR0,
+ DPCLKA_CFGCR0_DDI_CLK_SEL_MASK(port),
+ DPCLKA_CFGCR0_DDI_CLK_SEL(pll->info->id, port));
/*
* "This step and the step before must be
* done with separate register writes."
*/
- val = intel_de_read(i915, DPCLKA_CFGCR0);
- val &= ~DPCLKA_CFGCR0_DDI_CLK_OFF(port);
- intel_de_write(i915, DPCLKA_CFGCR0, val);
+ intel_de_rmw(i915, DPCLKA_CFGCR0,
+ DPCLKA_CFGCR0_DDI_CLK_OFF(port), 0);
mutex_unlock(&i915->dpll.lock);
}
@@ -1944,8 +1927,8 @@ static void cnl_ddi_disable_clock(struct intel_encoder *encoder)
struct drm_i915_private *i915 = to_i915(encoder->base.dev);
enum port port = encoder->port;
- intel_de_write(i915, DPCLKA_CFGCR0,
- intel_de_read(i915, DPCLKA_CFGCR0) | DPCLKA_CFGCR0_DDI_CLK_OFF(port));
+ intel_de_rmw(i915, DPCLKA_CFGCR0,
+ 0, DPCLKA_CFGCR0_DDI_CLK_OFF(port));
}
static void skl_ddi_enable_clock(struct intel_encoder *encoder,
@@ -1954,21 +1937,17 @@ static void skl_ddi_enable_clock(struct intel_encoder *encoder,
struct drm_i915_private *i915 = to_i915(encoder->base.dev);
const struct intel_shared_dpll *pll = crtc_state->shared_dpll;
enum port port = encoder->port;
- u32 val;
if (drm_WARN_ON(&i915->drm, !pll))
return;
mutex_lock(&i915->dpll.lock);
- val = intel_de_read(i915, DPLL_CTRL2);
-
- val &= ~(DPLL_CTRL2_DDI_CLK_OFF(port) |
- DPLL_CTRL2_DDI_CLK_SEL_MASK(port));
- val |= (DPLL_CTRL2_DDI_CLK_SEL(pll->info->id, port) |
- DPLL_CTRL2_DDI_SEL_OVERRIDE(port));
-
- intel_de_write(i915, DPLL_CTRL2, val);
+ intel_de_rmw(i915, DPLL_CTRL2,
+ DPLL_CTRL2_DDI_CLK_OFF(port) |
+ DPLL_CTRL2_DDI_CLK_SEL_MASK(port),
+ DPLL_CTRL2_DDI_CLK_SEL(pll->info->id, port) |
+ DPLL_CTRL2_DDI_SEL_OVERRIDE(port));
mutex_unlock(&i915->dpll.lock);
}
@@ -1978,8 +1957,8 @@ static void skl_ddi_disable_clock(struct intel_encoder *encoder)
struct drm_i915_private *i915 = to_i915(encoder->base.dev);
enum port port = encoder->port;
- intel_de_write(i915, DPLL_CTRL2,
- intel_de_read(i915, DPLL_CTRL2) | DPLL_CTRL2_DDI_CLK_OFF(port));
+ intel_de_rmw(i915, DPLL_CTRL2,
+ 0, DPLL_CTRL2_DDI_CLK_OFF(port));
}
void hsw_ddi_enable_clock(struct intel_encoder *encoder,
--
2.26.2
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