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drm/i915/icp: Add Interrupt Support 

This patch addresses Interrupts from south display engine (SDE).

ICP has two registers - SHOTPLUG_CTL_DDI and SHOTPLUG_CTL_TC.
Introduce these registers and their intended values.

Introduce icp_irq_handler().

The icp_irq_postinstall() takes care of
enabling all PCH interrupt sources, to unmask
them as needed with SDEIMR, as is done
done by ibx_irq_pre_postinstall() for earlier platforms.
We do not need to explicitly call the ibx_irq_pre_postinstall().

Also, while changing these,
s/CPT/PPT/CPT-CNP comment.

v2:
- remove redundant register defines.(Lucas)
- Change register names to be more consistent with
previous platforms (Lucas)

v3:
-Reorder bit defines to a more appropriate location.
 Change the comments. Confirm in the commit message that
 icp_irq_postinstall() need not go to
 ibx_irq_pre_postinstall() and ibx_irq_postinstall()
 as in earlier platforms. (Paulo)

Cc: Lucas De Marchi <lucas.de.marchi@gmail.com>
Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Cc: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Cc: Ville Syrjala <ville.syrjala@linux.intel.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Anusha Srivatsa <anusha.srivatsa@intel.com>
[Paulo: coding style bikesheds and rebases].
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1530046343-30649-1-git-send-email-anusha.srivatsa@intel.com
This commit is contained in:
Anusha Srivatsa 2018-06-26 13:52:23 -07:00 committed by Paulo Zanoni
parent a61b47f672
commit 3160422251
2 changed files with 172 additions and 3 deletions
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134
drivers/gpu/drm/i915/i915_irq.c
View File

@ -122,6 +122,15 @@ static const u32 hpd_gen11[HPD_NUM_PINS] = {
[HPD_PORT_F] = GEN11_TC4_HOTPLUG | GEN11_TBT4_HOTPLUG
};
static const u32 hpd_icp[HPD_NUM_PINS] = {
[HPD_PORT_A] = SDE_DDIA_HOTPLUG_ICP,
[HPD_PORT_B] = SDE_DDIB_HOTPLUG_ICP,
[HPD_PORT_C] = SDE_TC1_HOTPLUG_ICP,
[HPD_PORT_D] = SDE_TC2_HOTPLUG_ICP,
[HPD_PORT_E] = SDE_TC3_HOTPLUG_ICP,
[HPD_PORT_F] = SDE_TC4_HOTPLUG_ICP
};
/* IIR can theoretically queue up two events. Be paranoid. */
#define GEN8_IRQ_RESET_NDX(type, which) do { \
I915_WRITE(GEN8_##type##_IMR(which), 0xffffffff); \
@ -1586,6 +1595,34 @@ static bool bxt_port_hotplug_long_detect(enum port port, u32 val)
}
}
static bool icp_ddi_port_hotplug_long_detect(enum port port, u32 val)
{
switch (port) {
case PORT_A:
return val & ICP_DDIA_HPD_LONG_DETECT;
case PORT_B:
return val & ICP_DDIB_HPD_LONG_DETECT;
default:
return false;
}
}
static bool icp_tc_port_hotplug_long_detect(enum port port, u32 val)
{
switch (port) {
case PORT_C:
return val & ICP_TC_HPD_LONG_DETECT(PORT_TC1);
case PORT_D:
return val & ICP_TC_HPD_LONG_DETECT(PORT_TC2);
case PORT_E:
return val & ICP_TC_HPD_LONG_DETECT(PORT_TC3);
case PORT_F:
return val & ICP_TC_HPD_LONG_DETECT(PORT_TC4);
default:
return false;
}
}
static bool spt_port_hotplug2_long_detect(enum port port, u32 val)
{
switch (port) {
@ -2385,6 +2422,43 @@ static void cpt_irq_handler(struct drm_i915_private *dev_priv, u32 pch_iir)
cpt_serr_int_handler(dev_priv);
}
static void icp_irq_handler(struct drm_i915_private *dev_priv, u32 pch_iir)
{
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 (ddi_hotplug_trigger) {
u32 dig_hotplug_reg;
dig_hotplug_reg = I915_READ(SHOTPLUG_CTL_DDI);
I915_WRITE(SHOTPLUG_CTL_DDI, dig_hotplug_reg);
intel_get_hpd_pins(dev_priv, &pin_mask, &long_mask,
ddi_hotplug_trigger,
dig_hotplug_reg, hpd_icp,
icp_ddi_port_hotplug_long_detect);
}
if (tc_hotplug_trigger) {
u32 dig_hotplug_reg;
dig_hotplug_reg = I915_READ(SHOTPLUG_CTL_TC);
I915_WRITE(SHOTPLUG_CTL_TC, dig_hotplug_reg);
intel_get_hpd_pins(dev_priv, &pin_mask, &long_mask,
tc_hotplug_trigger,
dig_hotplug_reg, hpd_icp,
icp_tc_port_hotplug_long_detect);
}
if (pin_mask)
intel_hpd_irq_handler(dev_priv, pin_mask, long_mask);
if (pch_iir & SDE_GMBUS_ICP)
gmbus_irq_handler(dev_priv);
}
static void spt_irq_handler(struct drm_i915_private *dev_priv, u32 pch_iir)
{
u32 hotplug_trigger = pch_iir & SDE_HOTPLUG_MASK_SPT &
@ -2804,8 +2878,11 @@ gen8_de_irq_handler(struct drm_i915_private *dev_priv, u32 master_ctl)
I915_WRITE(SDEIIR, iir);
ret = IRQ_HANDLED;
if (HAS_PCH_SPT(dev_priv) || HAS_PCH_KBP(dev_priv) ||
HAS_PCH_CNP(dev_priv))
if (HAS_PCH_ICP(dev_priv))
icp_irq_handler(dev_priv, iir);
else if (HAS_PCH_SPT(dev_priv) ||
HAS_PCH_KBP(dev_priv) ||
HAS_PCH_CNP(dev_priv))
spt_irq_handler(dev_priv, iir);
else
cpt_irq_handler(dev_priv, iir);
@ -3584,6 +3661,9 @@ static void gen11_irq_reset(struct drm_device *dev)
GEN3_IRQ_RESET(GEN11_DE_HPD_);
GEN3_IRQ_RESET(GEN11_GU_MISC_);
GEN3_IRQ_RESET(GEN8_PCU_);
if (HAS_PCH_ICP(dev_priv))
GEN3_IRQ_RESET(SDE);
}
void gen8_irq_power_well_post_enable(struct drm_i915_private *dev_priv,
@ -3700,6 +3780,35 @@ static void ibx_hpd_irq_setup(struct drm_i915_private *dev_priv)
ibx_hpd_detection_setup(dev_priv);
}
static void icp_hpd_detection_setup(struct drm_i915_private *dev_priv)
{
u32 hotplug;
hotplug = I915_READ(SHOTPLUG_CTL_DDI);
hotplug |= ICP_DDIA_HPD_ENABLE |
ICP_DDIB_HPD_ENABLE;
I915_WRITE(SHOTPLUG_CTL_DDI, hotplug);
hotplug = I915_READ(SHOTPLUG_CTL_TC);
hotplug |= ICP_TC_HPD_ENABLE(PORT_TC1) |
ICP_TC_HPD_ENABLE(PORT_TC2) |
ICP_TC_HPD_ENABLE(PORT_TC3) |
ICP_TC_HPD_ENABLE(PORT_TC4);
I915_WRITE(SHOTPLUG_CTL_TC, hotplug);
}
static void icp_hpd_irq_setup(struct drm_i915_private *dev_priv)
{
u32 hotplug_irqs, enabled_irqs;
hotplug_irqs = SDE_DDI_MASK_ICP | SDE_TC_MASK_ICP;
enabled_irqs = intel_hpd_enabled_irqs(dev_priv, hpd_icp);
ibx_display_interrupt_update(dev_priv, hotplug_irqs, enabled_irqs);
icp_hpd_detection_setup(dev_priv);
}
static void gen11_hpd_detection_setup(struct drm_i915_private *dev_priv)
{
u32 hotplug;
@ -3733,6 +3842,9 @@ static void gen11_hpd_irq_setup(struct drm_i915_private *dev_priv)
POSTING_READ(GEN11_DE_HPD_IMR);
gen11_hpd_detection_setup(dev_priv);
if (HAS_PCH_ICP(dev_priv))
icp_hpd_irq_setup(dev_priv);
}
static void spt_hpd_detection_setup(struct drm_i915_private *dev_priv)
@ -4168,11 +4280,29 @@ static void gen11_gt_irq_postinstall(struct drm_i915_private *dev_priv)
I915_WRITE(GEN11_GPM_WGBOXPERF_INTR_MASK, ~0);
}
static void icp_irq_postinstall(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = to_i915(dev);
u32 mask = SDE_GMBUS_ICP;
WARN_ON(I915_READ(SDEIER) != 0);
I915_WRITE(SDEIER, 0xffffffff);
POSTING_READ(SDEIER);
gen3_assert_iir_is_zero(dev_priv, SDEIIR);
I915_WRITE(SDEIMR, ~mask);
icp_hpd_detection_setup(dev_priv);
}
static int gen11_irq_postinstall(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
u32 gu_misc_masked = GEN11_GU_MISC_GSE;
if (HAS_PCH_ICP(dev_priv))
icp_irq_postinstall(dev);
gen11_gt_irq_postinstall(dev_priv);
gen8_de_irq_postinstall(dev_priv);

41
drivers/gpu/drm/i915/i915_reg.h
View File

@ -7462,7 +7462,7 @@ enum {
#define SDE_TRANSA_FIFO_UNDER (1 << 0)
#define SDE_TRANS_MASK (0x3f)
/* south display engine interrupt: CPT/PPT */
/* south display engine interrupt: CPT - CNP */
#define SDE_AUDIO_POWER_D_CPT (1 << 31)
#define SDE_AUDIO_POWER_C_CPT (1 << 30)
#define SDE_AUDIO_POWER_B_CPT (1 << 29)
@ -7510,6 +7510,21 @@ enum {
SDE_FDI_RXB_CPT | \
SDE_FDI_RXA_CPT)
/* south display engine interrupt: ICP */
#define SDE_TC4_HOTPLUG_ICP (1 << 27)
#define SDE_TC3_HOTPLUG_ICP (1 << 26)
#define SDE_TC2_HOTPLUG_ICP (1 << 25)
#define SDE_TC1_HOTPLUG_ICP (1 << 24)
#define SDE_GMBUS_ICP (1 << 23)
#define SDE_DDIB_HOTPLUG_ICP (1 << 17)
#define SDE_DDIA_HOTPLUG_ICP (1 << 16)
#define SDE_DDI_MASK_ICP (SDE_DDIB_HOTPLUG_ICP | \
SDE_DDIA_HOTPLUG_ICP)
#define SDE_TC_MASK_ICP (SDE_TC4_HOTPLUG_ICP | \
SDE_TC3_HOTPLUG_ICP | \
SDE_TC2_HOTPLUG_ICP | \
SDE_TC1_HOTPLUG_ICP)
#define SDEISR _MMIO(0xc4000)
#define SDEIMR _MMIO(0xc4004)
#define SDEIIR _MMIO(0xc4008)
@ -7570,6 +7585,30 @@ enum {
#define PORTE_HOTPLUG_SHORT_DETECT (1 << 0)
#define PORTE_HOTPLUG_LONG_DETECT (2 << 0)
/* This register is a reuse of PCH_PORT_HOTPLUG register. The
* functionality covered in PCH_PORT_HOTPLUG is split into
* SHOTPLUG_CTL_DDI and SHOTPLUG_CTL_TC.
*/
#define SHOTPLUG_CTL_DDI _MMIO(0xc4030)
#define ICP_DDIB_HPD_ENABLE (1 << 7)
#define ICP_DDIB_HPD_STATUS_MASK (3 << 4)
#define ICP_DDIB_HPD_NO_DETECT (0 << 4)
#define ICP_DDIB_HPD_SHORT_DETECT (1 << 4)
#define ICP_DDIB_HPD_LONG_DETECT (2 << 4)
#define ICP_DDIB_HPD_SHORT_LONG_DETECT (3 << 4)
#define ICP_DDIA_HPD_ENABLE (1 << 3)
#define ICP_DDIA_HPD_STATUS_MASK (3 << 0)
#define ICP_DDIA_HPD_NO_DETECT (0 << 0)
#define ICP_DDIA_HPD_SHORT_DETECT (1 << 0)
#define ICP_DDIA_HPD_LONG_DETECT (2 << 0)
#define ICP_DDIA_HPD_SHORT_LONG_DETECT (3 << 0)
#define SHOTPLUG_CTL_TC _MMIO(0xc4034)
#define ICP_TC_HPD_ENABLE(tc_port) (8 << (tc_port) * 4)
#define ICP_TC_HPD_LONG_DETECT(tc_port) (2 << (tc_port) * 4)
#define ICP_TC_HPD_SHORT_DETECT(tc_port) (1 << (tc_port) * 4)
#define PCH_GPIOA _MMIO(0xc5010)
#define PCH_GPIOB _MMIO(0xc5014)
#define PCH_GPIOC _MMIO(0xc5018)