[Intel-gfx] [PATCH v3 2/4] drm/i915: Add reverse mapping between port and intel_encoder
Daniel Vetter
daniel at ffwll.ch
Thu Dec 10 02:06:43 PST 2015
On Thu, Dec 10, 2015 at 10:47:50AM +0100, Takashi Iwai wrote:
> On Thu, 10 Dec 2015 10:38:14 +0100,
> Daniel Vetter wrote:
> >
> > On Tue, Dec 08, 2015 at 06:42:09PM +0100, Takashi Iwai wrote:
> > > 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.
> >
> > Imo this note about mst should be in the commit message. lgtm otherwise.
>
> OK, I'll update the changelog.
>
> > Do you plan to prep a topic branch with all the patches that we could pull
> > into both snd and drm-intel trees?
>
> Yes, currently test/hdmi-jack branch contains these based on drm-next
> and some sound updates.
>
> > Note that for 4.5 features drm-intel closes next week, so not that much
> > time left.
>
> Yeah, I'd like to merge this stuff soonishly, too.
Great. When it's all ready can you pls send me a pull req?
Thanks, Daniel
>
>
> thanks,
>
> Takashi
>
> > -Daniel
> >
> > >
> > >
> > > 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
> > >
> >
> > --
> > Daniel Vetter
> > Software Engineer, Intel Corporation
> > http://blog.ffwll.ch
> >
--
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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