[Intel-gfx] [PATCH v2 16/19] drm/i915: Remove the per-plaform IIR HPD masking

[Ville Syrjälä]

On Fri, Oct 23, 2020 at 12:29:37PM -0700, Lucas De Marchi wrote:
> On Fri, Oct 23, 2020 at 04:34:17PM +0300, Ville Syrjälä wrote:
> >From: Ville Syrjälä <ville.syrjala at linux.intel.com>
> >
> >We no longer unmask all HPD irqs, so we can drop the ugly per-platform
> >HPD IIR masking. IMR will prevent unsupported bits from appearing in
> >IIR.
> >
> >Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
> 
> this patch should come after
> "drm/i915: Enable hpd logic only for ports that are present"

The order should not matter. We already mask out all unwanted bits
from IIR via IMR, so whether or not the HPD level is visible in ISR
for some unused pin is irrelevant.

> 
> >---
> > drivers/gpu/drm/i915/i915_irq.c | 21 ++-------------------
> > drivers/gpu/drm/i915/i915_reg.h | 10 ++--------
> > 2 files changed, 4 insertions(+), 27 deletions(-)
> >
> >diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
> >index be69c129dd5a..447a52f7701d 100644
> >--- a/drivers/gpu/drm/i915/i915_irq.c
> >+++ b/drivers/gpu/drm/i915/i915_irq.c
> >@@ -1883,27 +1883,10 @@ static void cpt_irq_handler(struct drm_i915_private *dev_priv, u32 pch_iir)
> >
> > static void icp_irq_handler(struct drm_i915_private *dev_priv, u32 pch_iir)
> > {
> >-	u32 ddi_hotplug_trigger, tc_hotplug_trigger;
> >+	u32 ddi_hotplug_trigger = pch_iir & SDE_DDI_MASK_ICP;
> >+	u32 tc_hotplug_trigger = pch_iir & SDE_TC_MASK_ICP;
> > 	u32 pin_mask = 0, long_mask = 0;
> >
> >-	if (HAS_PCH_TGP(dev_priv)) {
> >-		ddi_hotplug_trigger = pch_iir & SDE_DDI_MASK_TGP;
> >-		tc_hotplug_trigger = pch_iir & SDE_TC_MASK_TGP;
> >-	} else if (HAS_PCH_JSP(dev_priv)) {
> >-		ddi_hotplug_trigger = pch_iir & SDE_DDI_MASK_TGP;
> >-		tc_hotplug_trigger = 0;
> >-	} else if (HAS_PCH_MCC(dev_priv)) {
> >-		ddi_hotplug_trigger = pch_iir & SDE_DDI_MASK_ICP;
> >-		tc_hotplug_trigger = pch_iir & SDE_TC_HOTPLUG_ICP(HPD_PORT_TC1);
> >-	} else {
> >-		drm_WARN(&dev_priv->drm, !HAS_PCH_ICP(dev_priv),
> >-			 "Unrecognized PCH type 0x%x\n",
> >-			 INTEL_PCH_TYPE(dev_priv));
> >-
> >-		ddi_hotplug_trigger = pch_iir & SDE_DDI_MASK_ICP;
> >-		tc_hotplug_trigger = pch_iir & SDE_TC_MASK_ICP;
> >-	}
> >-
> > 	if (ddi_hotplug_trigger) {
> > 		u32 dig_hotplug_reg;
> >
> >diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
> >index 8f26ab69b366..f15914fbe7c3 100644
> >--- a/drivers/gpu/drm/i915/i915_reg.h
> >+++ b/drivers/gpu/drm/i915/i915_reg.h
> >@@ -8351,16 +8351,10 @@ enum {
> > #define SDE_GMBUS_ICP			(1 << 23)
> > #define SDE_TC_HOTPLUG_ICP(hpd_pin)	REG_BIT(24 + _HPD_PIN_TC(hpd_pin))
> > #define SDE_DDI_HOTPLUG_ICP(hpd_pin)	REG_BIT(16 + _HPD_PIN_DDI(hpd_pin))
> >-#define SDE_DDI_MASK_ICP		(SDE_DDI_HOTPLUG_ICP(HPD_PORT_B) | \
> >-					 SDE_DDI_HOTPLUG_ICP(HPD_PORT_A))
> >-#define SDE_TC_MASK_ICP			(SDE_TC_HOTPLUG_ICP(HPD_PORT_TC4) | \
> >-					 SDE_TC_HOTPLUG_ICP(HPD_PORT_TC3) | \
> >-					 SDE_TC_HOTPLUG_ICP(HPD_PORT_TC2) | \
> >-					 SDE_TC_HOTPLUG_ICP(HPD_PORT_TC1))
> >-#define SDE_DDI_MASK_TGP		(SDE_DDI_HOTPLUG_ICP(HPD_PORT_C) | \
> >+#define SDE_DDI_MASK_ICP		(SDE_DDI_HOTPLUG_ICP(HPD_PORT_C) | \
> > 					 SDE_DDI_HOTPLUG_ICP(HPD_PORT_B) | \
> > 					 SDE_DDI_HOTPLUG_ICP(HPD_PORT_A))
> 
> and here is the opportunity to rename this to SDE_DDI_HOTPLUG_MASK_ICP
> or in a separate patch.
> 
> with the patch reorder,
> 
> 
> Reviewed-by: Lucas De Marchi <lucas.demarchi at intel.com>
> 
> Lucas De Marchi
> 
> >-#define SDE_TC_MASK_TGP			(SDE_TC_HOTPLUG_ICP(HPD_PORT_TC6) | \
> >+#define SDE_TC_MASK_ICP			(SDE_TC_HOTPLUG_ICP(HPD_PORT_TC6) | \
> > 					 SDE_TC_HOTPLUG_ICP(HPD_PORT_TC5) | \
> > 					 SDE_TC_HOTPLUG_ICP(HPD_PORT_TC4) | \
> > 					 SDE_TC_HOTPLUG_ICP(HPD_PORT_TC3) | \
> >-- 
> >2.26.2
> >
> >_______________________________________________
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> >Intel-gfx at lists.freedesktop.org
> >https://lists.freedesktop.org/mailman/listinfo/intel-gfx

-- 
Ville Syrjälä
Intel