[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 01:38:14 PST 2015
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.
Do you plan to prep a topic branch with all the patches that we could pull
into both snd and drm-intel trees?
Note that for 4.5 features drm-intel closes next week, so not that much
time left.
-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
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