[alsa-devel] [Intel-gfx] [PATCH v3 2/4] drm/i915: Add reverse mapping between port and intel_encoder
Takashi Iwai
tiwai at suse.de
Tue Dec 8 18:42:09 CET 2015
On Mon, 07 Dec 2015 10:41:51 +0100,
Takashi Iwai wrote:
>
> On Mon, 07 Dec 2015 09:44:45 +0100,
> Daniel Vetter wrote:
> >
> > On Fri, Dec 04, 2015 at 06:12:47PM +0100, Takashi Iwai wrote:
> > > This patch adds a reverse mapping from a digital port number to
> > > intel_encoder object containing the corresponding intel_digital_port.
> > > It simplifies the query of the encoder a lot.
> > >
> > > Signed-off-by: Takashi Iwai <tiwai at suse.de>
> > > ---
> > > v2->v3:
> > > * Squashed previously two cleanup patches to a single patch
> > >
> > > drivers/gpu/drm/i915/i915_drv.h | 2 ++
> > > drivers/gpu/drm/i915/intel_audio.c | 39 +++++++++++---------------------------
> > > drivers/gpu/drm/i915/intel_ddi.c | 1 +
> > > drivers/gpu/drm/i915/intel_dp.c | 1 +
> > > drivers/gpu/drm/i915/intel_hdmi.c | 2 ++
> > > 5 files changed, 17 insertions(+), 28 deletions(-)
> > >
> > > diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
> > > index 15c6dc0b4f37..9dbc143cac27 100644
> > > --- a/drivers/gpu/drm/i915/i915_drv.h
> > > +++ b/drivers/gpu/drm/i915/i915_drv.h
> > > @@ -1944,6 +1944,8 @@ struct drm_i915_private {
> > > /* perform PHY state sanity checks? */
> > > bool chv_phy_assert[2];
> > >
> > > + struct intel_encoder *dig_port_map[I915_MAX_PORTS];
> > > +
> > > /*
> > > * NOTE: This is the dri1/ums dungeon, don't add stuff here. Your patch
> > > * will be rejected. Instead look for a better place.
> > > diff --git a/drivers/gpu/drm/i915/intel_audio.c b/drivers/gpu/drm/i915/intel_audio.c
> > > index eeac9f763110..05f08b445dd6 100644
> > > --- a/drivers/gpu/drm/i915/intel_audio.c
> > > +++ b/drivers/gpu/drm/i915/intel_audio.c
> > > @@ -636,13 +636,11 @@ static int i915_audio_component_sync_audio_rate(struct device *dev,
> > > int port, int rate)
> > > {
> > > struct drm_i915_private *dev_priv = dev_to_i915(dev);
> > > - struct drm_device *drm_dev = dev_priv->dev;
> > > struct intel_encoder *intel_encoder;
> > > - struct intel_digital_port *intel_dig_port;
> > > struct intel_crtc *crtc;
> > > struct drm_display_mode *mode;
> > > struct i915_audio_component *acomp = dev_priv->audio_component;
> > > - enum pipe pipe = -1;
> > > + enum pipe pipe = INVALID_PIPE;
> > > u32 tmp;
> > > int n;
> > >
> > > @@ -655,21 +653,12 @@ static int i915_audio_component_sync_audio_rate(struct device *dev,
> > >
> > > mutex_lock(&dev_priv->av_mutex);
> > > /* 1. get the pipe */
> > > - for_each_intel_encoder(drm_dev, intel_encoder) {
> > > - if (intel_encoder->type != INTEL_OUTPUT_HDMI)
> > > - continue;
> > > - intel_dig_port = enc_to_dig_port(&intel_encoder->base);
> > > - if (port == intel_dig_port->port) {
> > > - crtc = to_intel_crtc(intel_encoder->base.crtc);
> > > - if (!crtc) {
> > > - DRM_DEBUG_KMS("%s: crtc is NULL\n", __func__);
> > > - continue;
> > > - }
> > > - pipe = crtc->pipe;
> > > - break;
> > > - }
> > > + intel_encoder = dev_priv->dig_port_map[port];
> > > + if (intel_encoder && intel_encoder->type == INTEL_OUTPUT_HDMI &&
> >
> > Is it really legit to call these functions with a port for which we don't
> > have an encoder? WARN_ON(!encoder) here and in the other places?
>
> Currently there are little checks in the caller side. So I guess only
> a few of them deserve WARN_ON(). The empty encoder and empty crtc
> would be good with WARN_ON(), as the port is supposed to be real.
> The HDMI check may be silent as is.
>
> > Or would
> > that require some function for snd-hda to inquire i915 which ports are
> > enabled (which we probably should have to avoid registering audio ports
> > that aren't there)?
> >
> > Otherwise lgtm.
>
> OK, I'll add WARN_ON() to them.
It turned out that the encoder might be NULL for MST, as currently
it's not set properly yet. So WARN_ON() will splat too much
unnecessarily.
Though, I rewrote a bit about the check and give a bit more messages.
Below is the revised patch. So far, I have only this change, so I
hesitate to resubmit the whole patchset. If a full patchset is
still preferred, let me know.
thanks,
Takashi
-- 8< --
From: Takashi Iwai <tiwai at suse.de>
Subject: [PATCH v4] drm/i915: Add reverse mapping between port and intel_encoder
This patch adds a reverse mapping from a digital port number to
intel_encoder object containing the corresponding intel_digital_port.
It simplifies the query of the encoder a lot.
Signed-off-by: Takashi Iwai <tiwai at suse.de>
---
v3->v4: add a bit more verbose check for NULL encoder, etc.
drivers/gpu/drm/i915/i915_drv.h | 2 ++
drivers/gpu/drm/i915/intel_audio.c | 57 +++++++++++++++-----------------------
drivers/gpu/drm/i915/intel_ddi.c | 1 +
drivers/gpu/drm/i915/intel_dp.c | 1 +
drivers/gpu/drm/i915/intel_hdmi.c | 2 ++
5 files changed, 28 insertions(+), 35 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 15c6dc0b4f37..9dbc143cac27 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -1944,6 +1944,8 @@ struct drm_i915_private {
/* perform PHY state sanity checks? */
bool chv_phy_assert[2];
+ struct intel_encoder *dig_port_map[I915_MAX_PORTS];
+
/*
* NOTE: This is the dri1/ums dungeon, don't add stuff here. Your patch
* will be rejected. Instead look for a better place.
diff --git a/drivers/gpu/drm/i915/intel_audio.c b/drivers/gpu/drm/i915/intel_audio.c
index eeac9f763110..6380b2400448 100644
--- a/drivers/gpu/drm/i915/intel_audio.c
+++ b/drivers/gpu/drm/i915/intel_audio.c
@@ -636,15 +636,14 @@ static int i915_audio_component_sync_audio_rate(struct device *dev,
int port, int rate)
{
struct drm_i915_private *dev_priv = dev_to_i915(dev);
- struct drm_device *drm_dev = dev_priv->dev;
struct intel_encoder *intel_encoder;
- struct intel_digital_port *intel_dig_port;
struct intel_crtc *crtc;
struct drm_display_mode *mode;
struct i915_audio_component *acomp = dev_priv->audio_component;
- enum pipe pipe = -1;
+ enum pipe pipe = INVALID_PIPE;
u32 tmp;
int n;
+ int err = 0;
/* HSW, BDW, SKL, KBL need this fix */
if (!IS_SKYLAKE(dev_priv) &&
@@ -655,26 +654,21 @@ static int i915_audio_component_sync_audio_rate(struct device *dev,
mutex_lock(&dev_priv->av_mutex);
/* 1. get the pipe */
- for_each_intel_encoder(drm_dev, intel_encoder) {
- if (intel_encoder->type != INTEL_OUTPUT_HDMI)
- continue;
- intel_dig_port = enc_to_dig_port(&intel_encoder->base);
- if (port == intel_dig_port->port) {
- crtc = to_intel_crtc(intel_encoder->base.crtc);
- if (!crtc) {
- DRM_DEBUG_KMS("%s: crtc is NULL\n", __func__);
- continue;
- }
- pipe = crtc->pipe;
- break;
- }
+ intel_encoder = dev_priv->dig_port_map[port];
+ if (!intel_encoder || !intel_encoder->base.crtc ||
+ intel_encoder->type != INTEL_OUTPUT_HDMI) {
+ DRM_DEBUG_KMS("no valid port %c\n", port_name(port));
+ err = -ENODEV;
+ goto unlock;
}
-
+ crtc = to_intel_crtc(intel_encoder->base.crtc);
+ pipe = crtc->pipe;
if (pipe == INVALID_PIPE) {
DRM_DEBUG_KMS("no pipe for the port %c\n", port_name(port));
- mutex_unlock(&dev_priv->av_mutex);
- return -ENODEV;
+ err = -ENODEV;
+ goto unlock;
}
+
DRM_DEBUG_KMS("pipe %c connects port %c\n",
pipe_name(pipe), port_name(port));
mode = &crtc->config->base.adjusted_mode;
@@ -687,8 +681,7 @@ static int i915_audio_component_sync_audio_rate(struct device *dev,
tmp = I915_READ(HSW_AUD_CFG(pipe));
tmp &= ~AUD_CONFIG_N_PROG_ENABLE;
I915_WRITE(HSW_AUD_CFG(pipe), tmp);
- mutex_unlock(&dev_priv->av_mutex);
- return 0;
+ goto unlock;
}
n = audio_config_get_n(mode, rate);
@@ -698,8 +691,7 @@ static int i915_audio_component_sync_audio_rate(struct device *dev,
tmp = I915_READ(HSW_AUD_CFG(pipe));
tmp &= ~AUD_CONFIG_N_PROG_ENABLE;
I915_WRITE(HSW_AUD_CFG(pipe), tmp);
- mutex_unlock(&dev_priv->av_mutex);
- return 0;
+ goto unlock;
}
/* 3. set the N/CTS/M */
@@ -707,8 +699,9 @@ static int i915_audio_component_sync_audio_rate(struct device *dev,
tmp = audio_config_setup_n_reg(n, tmp);
I915_WRITE(HSW_AUD_CFG(pipe), tmp);
+ unlock:
mutex_unlock(&dev_priv->av_mutex);
- return 0;
+ return err;
}
static int i915_audio_component_get_eld(struct device *dev, int port,
@@ -716,27 +709,21 @@ static int i915_audio_component_get_eld(struct device *dev, int port,
unsigned char *buf, int max_bytes)
{
struct drm_i915_private *dev_priv = dev_to_i915(dev);
- struct drm_device *drm_dev = dev_priv->dev;
struct intel_encoder *intel_encoder;
struct intel_digital_port *intel_dig_port;
const u8 *eld;
int ret = -EINVAL;
mutex_lock(&dev_priv->av_mutex);
- for_each_intel_encoder(drm_dev, intel_encoder) {
- if (intel_encoder->type != INTEL_OUTPUT_DISPLAYPORT &&
- intel_encoder->type != INTEL_OUTPUT_HDMI)
- continue;
+ intel_encoder = dev_priv->dig_port_map[port];
+ if (intel_encoder) {
+ ret = 0;
intel_dig_port = enc_to_dig_port(&intel_encoder->base);
- if (port == intel_dig_port->port) {
- ret = 0;
- *enabled = intel_dig_port->audio_connector != NULL;
- if (!*enabled)
- break;
+ *enabled = intel_dig_port->audio_connector != NULL;
+ if (*enabled) {
eld = intel_dig_port->audio_connector->eld;
ret = drm_eld_size(eld);
memcpy(buf, eld, min(max_bytes, ret));
- break;
}
}
diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
index 76ce7c2960b6..59deb0d85533 100644
--- a/drivers/gpu/drm/i915/intel_ddi.c
+++ b/drivers/gpu/drm/i915/intel_ddi.c
@@ -3295,6 +3295,7 @@ void intel_ddi_init(struct drm_device *dev, enum port port)
intel_encoder->get_config = intel_ddi_get_config;
intel_dig_port->port = port;
+ dev_priv->dig_port_map[port] = intel_encoder;
intel_dig_port->saved_port_bits = I915_READ(DDI_BUF_CTL(port)) &
(DDI_BUF_PORT_REVERSAL |
DDI_A_4_LANES);
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index e1ceff7ab265..e1456ead5c53 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -6003,6 +6003,7 @@ intel_dp_init(struct drm_device *dev,
}
intel_dig_port->port = port;
+ dev_priv->dig_port_map[port] = intel_encoder;
intel_dig_port->dp.output_reg = output_reg;
intel_encoder->type = INTEL_OUTPUT_DISPLAYPORT;
diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c
index bdd462e7c690..c046017be786 100644
--- a/drivers/gpu/drm/i915/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/intel_hdmi.c
@@ -2148,6 +2148,7 @@ void intel_hdmi_init_connector(struct intel_digital_port *intel_dig_port,
void intel_hdmi_init(struct drm_device *dev,
i915_reg_t hdmi_reg, enum port port)
{
+ struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_digital_port *intel_dig_port;
struct intel_encoder *intel_encoder;
struct intel_connector *intel_connector;
@@ -2216,6 +2217,7 @@ void intel_hdmi_init(struct drm_device *dev,
intel_encoder->cloneable |= 1 << INTEL_OUTPUT_HDMI;
intel_dig_port->port = port;
+ dev_priv->dig_port_map[port] = intel_encoder;
intel_dig_port->hdmi.hdmi_reg = hdmi_reg;
intel_dig_port->dp.output_reg = INVALID_MMIO_REG;
--
2.6.3
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