[Intel-gfx] [PATCH 2/2] drm/i915/skl: Adding DDI_E power well domain

[Zhang, Xiong Y]

Sorry, but I don't get how this enables power_well_2 as well. I just see it enabling ddi A/E as the other.

Maybe Paulo or Imre are the best one to review this.

On Thu, Aug 13, 2015 at 2:54 AM Xiong Zhang <xiong.y.zhang at intel.com<mailto:xiong.y.zhang at intel.com>> wrote:
From B spec, DDI_E port belong to PowerWell 2, but
DDI_E share the powerwell_req/staus register bit with
DDI_A which belong to DDI_A_E_POWER_WELL.

In order to communicate with the connector on DDI-E, both
DDI_A_E_POWER_WELL and POWER_WELL_2 must be enabled.

Currently intel_dp_power_get(DDI_E) only enable
DDI_A_E_POWER_WELL, this patch will not only enable
DDI_a_E_POWER_WELL but also enable POWER_WELL_2.

This patch also fix the DDI-E hotplug function.

Signed-off-by: Xiong Zhang <xiong.y.zhang at intel.com<mailto:xiong.y.zhang at intel.com>>
---
 drivers/gpu/drm/i915/i915_debugfs.c     | 2 ++
 drivers/gpu/drm/i915/i915_drv.h         | 1 +
 drivers/gpu/drm/i915/intel_display.c    | 3 ++-
 drivers/gpu/drm/i915/intel_runtime_pm.c | 2 ++
 4 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 86734be..5523b6e 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -2564,6 +2564,8 @@ static const char *power_domain_str(enum intel_display_power_domain domain)
                return "PORT_DDI_D_2_LANES";
        case POWER_DOMAIN_PORT_DDI_D_4_LANES:
                return "PORT_DDI_D_4_LANES";
+       case POWER_DOMAIN_PORT_DDI_E_2_LANES:
+               return "PORT_DDI_E_2_LANES";
        case POWER_DOMAIN_PORT_DSI:
                return "PORT_DSI";
        case POWER_DOMAIN_PORT_CRT:
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index b157865..ee71f90 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -182,6 +182,7 @@ enum intel_display_power_domain {
        POWER_DOMAIN_PORT_DDI_C_4_LANES,
        POWER_DOMAIN_PORT_DDI_D_2_LANES,
        POWER_DOMAIN_PORT_DDI_D_4_LANES,
+       POWER_DOMAIN_PORT_DDI_E_2_LANES,
        POWER_DOMAIN_PORT_DSI,
        POWER_DOMAIN_PORT_CRT,
        POWER_DOMAIN_PORT_OTHER,
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 801187c..ccd3f0b 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -5150,7 +5150,6 @@ static enum intel_display_power_domain port_to_power_domain(enum port port)
 {
        switch (port) {
        case PORT_A:
-       case PORT_E:
                return POWER_DOMAIN_PORT_DDI_A_4_LANES;
        case PORT_B:
                return POWER_DOMAIN_PORT_DDI_B_4_LANES;
@@ -5158,6 +5157,8 @@ static enum intel_display_power_domain port_to_power_domain(enum port port)
                return POWER_DOMAIN_PORT_DDI_C_4_LANES;
        case PORT_D:
                return POWER_DOMAIN_PORT_DDI_D_4_LANES;
+       case PORT_E:
+               return POWER_DOMAIN_PORT_DDI_E_2_LANES;
        default:
                WARN_ON_ONCE(1);
                return POWER_DOMAIN_PORT_OTHER;
diff --git a/drivers/gpu/drm/i915/intel_runtime_pm.c b/drivers/gpu/drm/i915/intel_runtime_pm.c
index 821644d..af7fdb3 100644
--- a/drivers/gpu/drm/i915/intel_runtime_pm.c
+++ b/drivers/gpu/drm/i915/intel_runtime_pm.c
@@ -297,6 +297,7 @@ static void hsw_set_power_well(struct drm_i915_private *dev_priv,
        BIT(POWER_DOMAIN_PORT_DDI_C_4_LANES) |          \
        BIT(POWER_DOMAIN_PORT_DDI_D_2_LANES) |          \
        BIT(POWER_DOMAIN_PORT_DDI_D_4_LANES) |          \
+       BIT(POWER_DOMAIN_PORT_DDI_E_2_LANES)
[Zhang, Xiong Y] this line put DDI_E_2_LANES into SKL_DISPLAY_POWERWELL_2_POWER_DOMAINS, but the git format-patch doesn’t show
#define SKL_DISPLAY_POWERWELL_2_POWER_DOMAINS. So it isn’t easy to review this.
|          \
        BIT(POWER_DOMAIN_AUX_B) |                       \
        BIT(POWER_DOMAIN_AUX_C) |                       \
        BIT(POWER_DOMAIN_AUX_D) |                       \
@@ -316,6 +317,7 @@ static void hsw_set_power_well(struct drm_i915_private *dev_priv,
 #define SKL_DISPLAY_DDI_A_E_POWER_DOMAINS (            \
        BIT(POWER_DOMAIN_PORT_DDI_A_2_LANES) |          \
        BIT(POWER_DOMAIN_PORT_DDI_A_4_LANES) |          \
+       BIT(POWER_DOMAIN_PORT_DDI_E_2_LANES) |          \
        BIT(POWER_DOMAIN_INIT))
 #define SKL_DISPLAY_DDI_B_POWER_DOMAINS (              \
        BIT(POWER_DOMAIN_PORT_DDI_B_2_LANES) |          \
--
2.1.4

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