[PATCH 2/8] drm/i915: Add enum aux_ch and clean up the aux init to use it

Ville Syrjala
2018-02-22T18:10:41Z

From: Ville Syrjälä <ville.syrjala@linux.intel.com>

Since we no longer have a 1:1 correspondence between ports and AUX
channels, let's give AUX channels their own enum. Makes it easier
to tell the apples from the oranges, and we get rid of the
port E AUX power domain FIXME since we now derive the power domain
from the actual AUX CH.

v2: Rebase due to AUX F
v3: Split out the power domain fix (Rodrigo)

Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com> #v2
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> #v2
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
---
drivers/gpu/drm/i915/i915_reg.h | 8 +-
drivers/gpu/drm/i915/intel_display.h | 11 ++
drivers/gpu/drm/i915/intel_dp.c | 236 +++++++++++++++++------------------
drivers/gpu/drm/i915/intel_drv.h | 1 +
4 files changed, 131 insertions(+), 125 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 8c12ee2f89a9..eea5b2c537d4 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -5354,8 +5354,8 @@ enum {
#define _DPF_AUX_CH_DATA4 (dev_priv->info.display_mmio_offset + 0x64520)
#define _DPF_AUX_CH_DATA5 (dev_priv->info.display_mmio_offset + 0x64524)

-#define DP_AUX_CH_CTL(port) _MMIO_PORT(port, _DPA_AUX_CH_CTL, _DPB_AUX_CH_CTL)
-#define DP_AUX_CH_DATA(port, i) _MMIO(_PORT(port, _DPA_AUX_CH_DATA1, _DPB_AUX_CH_DATA1) + (i) * 4) /* 5 registers */
+#define DP_AUX_CH_CTL(aux_ch) _MMIO_PORT(aux_ch, _DPA_AUX_CH_CTL, _DPB_AUX_CH_CTL)
+#define DP_AUX_CH_DATA(aux_ch, i) _MMIO(_PORT(aux_ch, _DPA_AUX_CH_DATA1, _DPB_AUX_CH_DATA1) + (i) * 4) /* 5 registers */

#define DP_AUX_CH_CTL_SEND_BUSY (1 << 31)
#define DP_AUX_CH_CTL_DONE (1 << 30)
@@ -7882,8 +7882,8 @@ enum {
#define _PCH_DPD_AUX_CH_DATA4 0xe4320
#define _PCH_DPD_AUX_CH_DATA5 0xe4324

-#define PCH_DP_AUX_CH_CTL(port) _MMIO_PORT((port) - PORT_B, _PCH_DPB_AUX_CH_CTL, _PCH_DPC_AUX_CH_CTL)
-#define PCH_DP_AUX_CH_DATA(port, i) _MMIO(_PORT((port) - PORT_B, _PCH_DPB_AUX_CH_DATA1, _PCH_DPC_AUX_CH_DATA1) + (i) * 4) /* 5 registers */
+#define PCH_DP_AUX_CH_CTL(aux_ch) _MMIO_PORT((aux_ch) - AUX_CH_B, _PCH_DPB_AUX_CH_CTL, _PCH_DPC_AUX_CH_CTL)
+#define PCH_DP_AUX_CH_DATA(aux_ch, i) _MMIO(_PORT((aux_ch) - AUX_CH_B, _PCH_DPB_AUX_CH_DATA1, _PCH_DPC_AUX_CH_DATA1) + (i) * 4) /* 5 registers */

/* CPT */
#define PORT_TRANS_A_SEL_CPT 0
diff --git a/drivers/gpu/drm/i915/intel_display.h b/drivers/gpu/drm/i915/intel_display.h
index c4042e342f50..f5733a2576e7 100644
--- a/drivers/gpu/drm/i915/intel_display.h
+++ b/drivers/gpu/drm/i915/intel_display.h
@@ -139,6 +139,17 @@ enum dpio_phy {

#define I915_NUM_PHYS_VLV 2

+enum aux_ch {
+ AUX_CH_A,
+ AUX_CH_B,
+ AUX_CH_C,
+ AUX_CH_D,
+ _AUX_CH_E, /* does not exist */
+ AUX_CH_F,
+};
+
+#define aux_ch_name(a) ((a) + 'A')
+
enum intel_display_power_domain {
POWER_DOMAIN_PIPE_A,
POWER_DOMAIN_PIPE_B,
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index af1ee5e97d17..eeb8a026fd08 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -1331,171 +1331,194 @@ intel_dp_aux_transfer(struct drm_dp_aux *aux, struct drm_dp_aux_msg *msg)
return ret;
}

-static enum port intel_aux_port(struct drm_i915_private *dev_priv,
- enum port port)
+static enum aux_ch intel_aux_ch(struct intel_dp *intel_dp)
{
+ struct intel_encoder *encoder = &dp_to_dig_port(intel_dp)->base;
+ struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
+ enum port port = encoder->port;
const struct ddi_vbt_port_info *info =
&dev_priv->vbt.ddi_port_info[port];
- enum port aux_port;
+ enum aux_ch aux_ch;

if (!info->alternate_aux_channel) {
+ aux_ch = (enum aux_ch) port;
+
DRM_DEBUG_KMS("using AUX %c for port %c (platform default)\n",
- port_name(port), port_name(port));
- return port;
+ aux_ch_name(aux_ch), port_name(port));
+ return aux_ch;
}

switch (info->alternate_aux_channel) {
case DP_AUX_A:
- aux_port = PORT_A;
+ aux_ch = AUX_CH_A;
break;
case DP_AUX_B:
- aux_port = PORT_B;
+ aux_ch = AUX_CH_B;
break;
case DP_AUX_C:
- aux_port = PORT_C;
+ aux_ch = AUX_CH_C;
break;
case DP_AUX_D:
- aux_port = PORT_D;
+ aux_ch = AUX_CH_D;
break;
case DP_AUX_F:
- aux_port = PORT_F;
+ aux_ch = AUX_CH_F;
break;
default:
MISSING_CASE(info->alternate_aux_channel);
- aux_port = PORT_A;
+ aux_ch = AUX_CH_A;
break;
}

DRM_DEBUG_KMS("using AUX %c for port %c (VBT)\n",
- port_name(aux_port), port_name(port));
+ aux_ch_name(aux_ch), port_name(port));

- return aux_port;
+ return aux_ch;
+}
+
+static enum intel_display_power_domain
+intel_aux_power_domain(struct intel_dp *intel_dp)
+{
+ switch (intel_dp->aux_ch) {
+ case AUX_CH_A:
+ return POWER_DOMAIN_AUX_A;
+ case AUX_CH_B:
+ return POWER_DOMAIN_AUX_B;
+ case AUX_CH_C:
+ return POWER_DOMAIN_AUX_C;
+ case AUX_CH_D:
+ return POWER_DOMAIN_AUX_D;
+ case AUX_CH_F:
+ return POWER_DOMAIN_AUX_F;
+ default:
+ MISSING_CASE(intel_dp->aux_ch);
+ return POWER_DOMAIN_AUX_A;
+ }
}

static i915_reg_t g4x_aux_ctl_reg(struct drm_i915_private *dev_priv,
- enum port port)
+ enum aux_ch aux_ch)
{
- switch (port) {
- case PORT_B:
- case PORT_C:
- case PORT_D:
- return DP_AUX_CH_CTL(port);
+ switch (aux_ch) {
+ case AUX_CH_B:
+ case AUX_CH_C:
+ case AUX_CH_D:
+ return DP_AUX_CH_CTL(aux_ch);
default:
- MISSING_CASE(port);
- return DP_AUX_CH_CTL(PORT_B);
+ MISSING_CASE(aux_ch);
+ return DP_AUX_CH_CTL(AUX_CH_B);
}
}

static i915_reg_t g4x_aux_data_reg(struct drm_i915_private *dev_priv,
- enum port port, int index)
+ enum aux_ch aux_ch, int index)
{
- switch (port) {
- case PORT_B:
- case PORT_C:
- case PORT_D:
- return DP_AUX_CH_DATA(port, index);
+ switch (aux_ch) {
+ case AUX_CH_B:
+ case AUX_CH_C:
+ case AUX_CH_D:
+ return DP_AUX_CH_DATA(aux_ch, index);
default:
- MISSING_CASE(port);
- return DP_AUX_CH_DATA(PORT_B, index);
+ MISSING_CASE(aux_ch);
+ return DP_AUX_CH_DATA(AUX_CH_B, index);
}
}

static i915_reg_t ilk_aux_ctl_reg(struct drm_i915_private *dev_priv,
- enum port port)
-{
- switch (port) {
- case PORT_A:
- return DP_AUX_CH_CTL(port);
- case PORT_B:
- case PORT_C:
- case PORT_D:
- return PCH_DP_AUX_CH_CTL(port);
+ enum aux_ch aux_ch)
+{
+ switch (aux_ch) {
+ case AUX_CH_A:
+ return DP_AUX_CH_CTL(aux_ch);
+ case AUX_CH_B:
+ case AUX_CH_C:
+ case AUX_CH_D:
+ return PCH_DP_AUX_CH_CTL(aux_ch);
default:
- MISSING_CASE(port);
- return DP_AUX_CH_CTL(PORT_A);
+ MISSING_CASE(aux_ch);
+ return DP_AUX_CH_CTL(AUX_CH_A);
}
}

static i915_reg_t ilk_aux_data_reg(struct drm_i915_private *dev_priv,
- enum port port, int index)
-{
- switch (port) {
- case PORT_A:
- return DP_AUX_CH_DATA(port, index);
- case PORT_B:
- case PORT_C:
- case PORT_D:
- return PCH_DP_AUX_CH_DATA(port, index);
+ enum aux_ch aux_ch, int index)
+{
+ switch (aux_ch) {
+ case AUX_CH_A:
+ return DP_AUX_CH_DATA(aux_ch, index);
+ case AUX_CH_B:
+ case AUX_CH_C:
+ case AUX_CH_D:
+ return PCH_DP_AUX_CH_DATA(aux_ch, index);
default:
- MISSING_CASE(port);
- return DP_AUX_CH_DATA(PORT_A, index);
+ MISSING_CASE(aux_ch);
+ return DP_AUX_CH_DATA(AUX_CH_A, index);
}
}

static i915_reg_t skl_aux_ctl_reg(struct drm_i915_private *dev_priv,
- enum port port)
-{
- switch (port) {
- case PORT_A:
- case PORT_B:
- case PORT_C:
- case PORT_D:
- case PORT_F:
- return DP_AUX_CH_CTL(port);
+ enum aux_ch aux_ch)
+{
+ switch (aux_ch) {
+ case AUX_CH_A:
+ case AUX_CH_B:
+ case AUX_CH_C:
+ case AUX_CH_D:
+ case AUX_CH_F:
+ return DP_AUX_CH_CTL(aux_ch);
default:
- MISSING_CASE(port);
- return DP_AUX_CH_CTL(PORT_A);
+ MISSING_CASE(aux_ch);
+ return DP_AUX_CH_CTL(AUX_CH_A);
}
}

static i915_reg_t skl_aux_data_reg(struct drm_i915_private *dev_priv,
- enum port port, int index)
-{
- switch (port) {
- case PORT_A:
- case PORT_B:
- case PORT_C:
- case PORT_D:
- case PORT_F:
- return DP_AUX_CH_DATA(port, index);
+ enum aux_ch aux_ch, int index)
+{
+ switch (aux_ch) {
+ case AUX_CH_A:
+ case AUX_CH_B:
+ case AUX_CH_C:
+ case AUX_CH_D:
+ case AUX_CH_F:
+ return DP_AUX_CH_DATA(aux_ch, index);
default:
- MISSING_CASE(port);
- return DP_AUX_CH_DATA(PORT_A, index);
+ MISSING_CASE(aux_ch);
+ return DP_AUX_CH_DATA(AUX_CH_A, index);
}
}

static i915_reg_t intel_aux_ctl_reg(struct drm_i915_private *dev_priv,
- enum port port)
+ enum aux_ch aux_ch)
{
if (INTEL_GEN(dev_priv) >= 9)
- return skl_aux_ctl_reg(dev_priv, port);
+ return skl_aux_ctl_reg(dev_priv, aux_ch);
else if (HAS_PCH_SPLIT(dev_priv))
- return ilk_aux_ctl_reg(dev_priv, port);
+ return ilk_aux_ctl_reg(dev_priv, aux_ch);
else
- return g4x_aux_ctl_reg(dev_priv, port);
+ return g4x_aux_ctl_reg(dev_priv, aux_ch);
}

static i915_reg_t intel_aux_data_reg(struct drm_i915_private *dev_priv,
- enum port port, int index)
+ enum aux_ch aux_ch, int index)
{
if (INTEL_GEN(dev_priv) >= 9)
- return skl_aux_data_reg(dev_priv, port, index);
+ return skl_aux_data_reg(dev_priv, aux_ch, index);
else if (HAS_PCH_SPLIT(dev_priv))
- return ilk_aux_data_reg(dev_priv, port, index);
+ return ilk_aux_data_reg(dev_priv, aux_ch, index);
else
- return g4x_aux_data_reg(dev_priv, port, index);
+ return g4x_aux_data_reg(dev_priv, aux_ch, index);
}

static void intel_aux_reg_init(struct intel_dp *intel_dp)
{
struct drm_i915_private *dev_priv = to_i915(intel_dp_to_dev(intel_dp));
- enum port port = intel_aux_port(dev_priv,
- dp_to_dig_port(intel_dp)->base.port);
+ enum aux_ch aux_ch = intel_dp->aux_ch;
int i;

- intel_dp->aux_ch_ctl_reg = intel_aux_ctl_reg(dev_priv, port);
+ intel_dp->aux_ch_ctl_reg = intel_aux_ctl_reg(dev_priv, aux_ch);
for (i = 0; i < ARRAY_SIZE(intel_dp->aux_ch_data_reg); i++)
- intel_dp->aux_ch_data_reg[i] = intel_aux_data_reg(dev_priv, port, i);
+ intel_dp->aux_ch_data_reg[i] = intel_aux_data_reg(dev_priv, aux_ch, i);
}

static void
@@ -1507,14 +1530,17 @@ intel_dp_aux_fini(struct intel_dp *intel_dp)
static void
intel_dp_aux_init(struct intel_dp *intel_dp)
{
- struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
- enum port port = intel_dig_port->base.port;
+ struct intel_encoder *encoder = &dp_to_dig_port(intel_dp)->base;
+
+ intel_dp->aux_ch = intel_aux_ch(intel_dp);
+ intel_dp->aux_power_domain = intel_aux_power_domain(intel_dp);

intel_aux_reg_init(intel_dp);
drm_dp_aux_init(&intel_dp->aux);

/* Failure to allocate our preferred name is not critical */
- intel_dp->aux.name = kasprintf(GFP_KERNEL, "DPDDC-%c", port_name(port));
+ intel_dp->aux.name = kasprintf(GFP_KERNEL, "DPDDC-%c",
+ port_name(encoder->port));
intel_dp->aux.transfer = intel_dp_aux_transfer;
}

@@ -6266,38 +6292,6 @@ static bool intel_edp_init_connector(struct intel_dp *intel_dp,
return false;
}

-/* Set up the hotplug pin and aux power domain. */
-static void
-intel_dp_init_connector_port_info(struct intel_digital_port *intel_dig_port)
-{
- struct intel_encoder *encoder = &intel_dig_port->base;
- struct intel_dp *intel_dp = &intel_dig_port->dp;
- struct intel_encoder *intel_encoder = &intel_dig_port->base;
- struct drm_i915_private *dev_priv = to_i915(intel_encoder->base.dev);
-
- encoder->hpd_pin = intel_hpd_pin_default(dev_priv, encoder->port);
-
- switch (intel_aux_port(dev_priv, encoder->port)) {
- case PORT_A:
- intel_dp->aux_power_domain = POWER_DOMAIN_AUX_A;
- break;
- case PORT_B:
- intel_dp->aux_power_domain = POWER_DOMAIN_AUX_B;
- break;
- case PORT_C:
- intel_dp->aux_power_domain = POWER_DOMAIN_AUX_C;
- break;
- case PORT_D:
- intel_dp->aux_power_domain = POWER_DOMAIN_AUX_D;
- break;
- case PORT_F:
- intel_dp->aux_power_domain = POWER_DOMAIN_AUX_F;
- break;
- default:
- MISSING_CASE(encoder->port);
- }
-}
-
static void intel_dp_modeset_retry_work_fn(struct work_struct *work)
{
struct intel_connector *intel_connector;
@@ -6403,7 +6397,7 @@ intel_dp_init_connector(struct intel_digital_port *intel_dig_port,
connector->interlace_allowed = true;
connector->doublescan_allowed = 0;

- intel_dp_init_connector_port_info(intel_dig_port);
+ intel_encoder->hpd_pin = intel_hpd_pin_default(dev_priv, port);

intel_dp_aux_init(intel_dp);

diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 1535bfb7ea40..1908bbcc585a 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -1053,6 +1053,7 @@ struct intel_dp {
bool detect_done;
bool channel_eq_status;
bool reset_link_params;
+ enum aux_ch aux_ch;
uint8_t dpcd[DP_RECEIVER_CAP_SIZE];
uint8_t psr_dpcd[EDP_PSR_RECEIVER_CAP_SIZE];
uint8_t downstream_ports[DP_MAX_DOWNSTREAM_PORTS];
--
2.13.6