Re: [PATCH 13/18] drm/i915: Precompute HDMI infoframes

Daniel Vetter
2018-09-24T15:58:30Z

On Thu, Sep 20, 2018 at 09:51:40PM +0300, Ville Syrjala wrote:
> From: Ville Syrjälä <ville.syrjala@linux.intel.com>
>
> Store the infoframes in the crtc state and precompute them in
> .compute_config(). While precomputing we'll also fill out the
> inforames.enable bitmask appropriately.
>
> Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
> ---
> drivers/gpu/drm/i915/intel_ddi.c | 1 +
> drivers/gpu/drm/i915/intel_drv.h | 5 +
> drivers/gpu/drm/i915/intel_hdmi.c | 249 +++++++++++++++++++++++++++-----------
> 3 files changed, 187 insertions(+), 68 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
> index 19fef88e680e..5f3bd536d261 100644
> --- a/drivers/gpu/drm/i915/intel_ddi.c
> +++ b/drivers/gpu/drm/i915/intel_ddi.c
> @@ -3391,6 +3391,7 @@ void intel_ddi_get_config(struct intel_encoder *encoder,
> intel_dig_port = enc_to_dig_port(&encoder->base);
>
> pipe_config->infoframes.enable |=
> + intel_hdmi_infoframe_enable(HDMI_PACKET_TYPE_NULL) |

Misplaced hunk? Assuming I'm reading this correctly, this will give you a
0. Not exactly sure what's going on here ... I guess I'm not following why
we care about TYPE_NULL, and why we have to reconstruct it here?

I thought TYPE_NULL is equivalent to state->has_hdmi_sink? Comment
(unfortunately not yet kerneldoc) even explains that ...

Maybe just nuke all the TYPE_NULL tracking here, perhaps with the g4x
(except for g4x itself, because it's shared there) decoder to also take
DIP_ENABLE into account for has_hdmi_sink.

Or update the comment in intel_crtc_state.

Otherwise lgtm, thought admittedly I did clean over the details a bit,
trusting CI and gcc to catch the small stuff :-)

Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch> with the TYPE_NULL
story somehow figured out.
-Daniel

> intel_hdmi_infoframes_enabled(encoder, pipe_config);
>
> if (pipe_config->infoframes.enable)
> diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
> index 50c0c049ee15..357624a6bfe2 100644
> --- a/drivers/gpu/drm/i915/intel_drv.h
> +++ b/drivers/gpu/drm/i915/intel_drv.h
> @@ -895,6 +895,10 @@ struct intel_crtc_state {
>
> struct {
> u32 enable;
> + u32 gcp;
> + union hdmi_infoframe avi;
> + union hdmi_infoframe spd;
> + union hdmi_infoframe hdmi;
> } infoframes;
>
> /* HDMI scrambling status */
> @@ -1862,6 +1866,7 @@ void intel_dp_dual_mode_set_tmds_output(struct intel_hdmi *hdmi, bool enable);
> void intel_infoframe_init(struct intel_digital_port *intel_dig_port);
> u32 intel_hdmi_infoframes_enabled(struct intel_encoder *encoder,
> const struct intel_crtc_state *crtc_state);
> +u32 intel_hdmi_infoframe_enable(unsigned int type);
>
>
> /* intel_lvds.c */
> diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c
> index 98a44084324c..491001fc0fad 100644
> --- a/drivers/gpu/drm/i915/intel_hdmi.c
> +++ b/drivers/gpu/drm/i915/intel_hdmi.c
> @@ -446,6 +446,18 @@ static const u8 infoframe_type_to_idx[] = {
> HDMI_INFOFRAME_TYPE_VENDOR,
> };
>
> +u32 intel_hdmi_infoframe_enable(unsigned int type)
> +{
> + int i;
> +
> + for (i = 0; i < ARRAY_SIZE(infoframe_type_to_idx); i++) {
> + if (infoframe_type_to_idx[i] == type)
> + return BIT(i);
> + }
> +
> + return 0;
> +}
> +
> u32 intel_hdmi_infoframes_enabled(struct intel_encoder *encoder,
> const struct intel_crtc_state *crtc_state)
> {
> @@ -491,15 +503,23 @@ u32 intel_hdmi_infoframes_enabled(struct intel_encoder *encoder,
> */
> static void intel_write_infoframe(struct intel_encoder *encoder,
> const struct intel_crtc_state *crtc_state,
> - union hdmi_infoframe *frame)
> + enum hdmi_infoframe_type type,
> + const union hdmi_infoframe *frame)
> {
> struct intel_digital_port *intel_dig_port = enc_to_dig_port(&encoder->base);
> u8 buffer[VIDEO_DIP_DATA_SIZE];
> ssize_t len;
>
> + if ((crtc_state->infoframes.enable &
> + intel_hdmi_infoframe_enable(type)) == 0)
> + return;
> +
> + if (WARN_ON(frame->any.type != type))
> + return;
> +
> /* see comment above for the reason for this offset */
> - len = hdmi_infoframe_pack(frame, buffer + 1, sizeof(buffer) - 1);
> - if (len < 0)
> + len = hdmi_infoframe_pack_only(frame, buffer + 1, sizeof(buffer) - 1);
> + if (WARN_ON(len < 0))
> return;
>
> /* Insert the 'hole' (see big comment above) at position 3 */
> @@ -507,85 +527,111 @@ static void intel_write_infoframe(struct intel_encoder *encoder,
> buffer[3] = 0;
> len++;
>
> - intel_dig_port->write_infoframe(encoder,
> - crtc_state,
> - frame->any.type, buffer, len);
> + intel_dig_port->write_infoframe(encoder, crtc_state, type, buffer, len);
> }
>
> -static void intel_hdmi_set_avi_infoframe(struct intel_encoder *encoder,
> - const struct intel_crtc_state *crtc_state,
> - const struct drm_connector_state *conn_state)
> +static bool
> +intel_hdmi_compute_avi_infoframe(struct intel_encoder *encoder,
> + struct intel_crtc_state *crtc_state,
> + struct drm_connector_state *conn_state)
> {
> struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(&encoder->base);
> + struct hdmi_avi_infoframe *frame = &crtc_state->infoframes.avi.avi;
> + bool is_hdmi2_sink = conn_state->connector->display_info.hdmi.scdc.supported;
> const struct drm_display_mode *adjusted_mode =
> &crtc_state->base.adjusted_mode;
> - struct drm_connector *connector = &intel_hdmi->attached_connector->base;
> - bool is_hdmi2_sink = connector->display_info.hdmi.scdc.supported;
> - union hdmi_infoframe frame;
> int ret;
>
> - ret = drm_hdmi_avi_infoframe_from_display_mode(&frame.avi,
> + if (!crtc_state->has_infoframe)
> + return true;
> +
> + crtc_state->infoframes.enable |=
> + intel_hdmi_infoframe_enable(HDMI_INFOFRAME_TYPE_AVI);
> +
> + ret = drm_hdmi_avi_infoframe_from_display_mode(frame,
> adjusted_mode,
> is_hdmi2_sink);
> - if (ret < 0) {
> - DRM_ERROR("couldn't fill AVI infoframe\n");
> - return;
> - }
> + if (ret)
> + return false;
>
> if (crtc_state->ycbcr420)
> - frame.avi.colorspace = HDMI_COLORSPACE_YUV420;
> + frame->colorspace = HDMI_COLORSPACE_YUV420;
> else
> - frame.avi.colorspace = HDMI_COLORSPACE_RGB;
> + frame->colorspace = HDMI_COLORSPACE_RGB;
>
> - drm_hdmi_avi_infoframe_quant_range(&frame.avi, adjusted_mode,
> + drm_hdmi_avi_infoframe_quant_range(frame, adjusted_mode,
> crtc_state->limited_color_range ?
> HDMI_QUANTIZATION_RANGE_LIMITED :
> HDMI_QUANTIZATION_RANGE_FULL,
> intel_hdmi->rgb_quant_range_selectable,
> is_hdmi2_sink);
>
> - drm_hdmi_avi_infoframe_content_type(&frame.avi,
> - conn_state);
> + drm_hdmi_avi_infoframe_content_type(frame, conn_state);
>
> /* TODO: handle pixel repetition for YCBCR420 outputs */
> - intel_write_infoframe(encoder, crtc_state,
> - &frame);
> +
> + ret = hdmi_avi_infoframe_check(frame);
> + if (WARN_ON(ret))
> + return false;
> +
> + return true;
> }
>
> -static void intel_hdmi_set_spd_infoframe(struct intel_encoder *encoder,
> - const struct intel_crtc_state *crtc_state)
> +static bool
> +intel_hdmi_compute_spd_infoframe(struct intel_encoder *encoder,
> + struct intel_crtc_state *crtc_state,
> + struct drm_connector_state *conn_state)
> {
> - union hdmi_infoframe frame;
> + struct hdmi_spd_infoframe *frame = &crtc_state->infoframes.spd.spd;
> int ret;
>
> - ret = hdmi_spd_infoframe_init(&frame.spd, "Intel", "Integrated gfx");
> - if (ret < 0) {
> - DRM_ERROR("couldn't fill SPD infoframe\n");
> - return;
> - }
> + if (!crtc_state->has_infoframe)
> + return true;
>
> - frame.spd.sdi = HDMI_SPD_SDI_PC;
> + crtc_state->infoframes.enable |=
> + intel_hdmi_infoframe_enable(HDMI_INFOFRAME_TYPE_SPD);
>
> - intel_write_infoframe(encoder, crtc_state,
> - &frame);
> + ret = hdmi_spd_infoframe_init(frame, "Intel", "Integrated gfx");
> + if (WARN_ON(ret))
> + return false;
> +
> + frame->sdi = HDMI_SPD_SDI_PC;
> +
> + ret = hdmi_spd_infoframe_check(frame);
> + if (WARN_ON(ret))
> + return false;
> +
> + return true;
> }
>
> -static void
> -intel_hdmi_set_hdmi_infoframe(struct intel_encoder *encoder,
> - const struct intel_crtc_state *crtc_state,
> - const struct drm_connector_state *conn_state)
> -{
> - union hdmi_infoframe frame;
> +static bool
> +intel_hdmi_compute_hdmi_infoframe(struct intel_encoder *encoder,
> + struct intel_crtc_state *crtc_state,
> + struct drm_connector_state *conn_state)
> +{
> + struct hdmi_vendor_infoframe *frame =
> + &crtc_state->infoframes.hdmi.vendor.hdmi;
> + const struct drm_display_info *info =
> + &conn_state->connector->display_info;
> int ret;
>
> - ret = drm_hdmi_vendor_infoframe_from_display_mode(&frame.vendor.hdmi,
> + if (!crtc_state->has_infoframe || !info->has_hdmi_infoframe)
> + return true;
> +
> + crtc_state->infoframes.enable |=
> + intel_hdmi_infoframe_enable(HDMI_INFOFRAME_TYPE_VENDOR);
> +
> + ret = drm_hdmi_vendor_infoframe_from_display_mode(frame,
> conn_state->connector,
> &crtc_state->base.adjusted_mode);
> - if (ret < 0)
> - return;
> + if (WARN_ON(ret))
> + return false;
>
> - intel_write_infoframe(encoder, crtc_state,
> - &frame);
> + ret = hdmi_vendor_infoframe_check(frame);
> + if (WARN_ON(ret))
> + return false;
> +
> + return true;
> }
>
> static void g4x_set_infoframes(struct intel_encoder *encoder,
> @@ -645,9 +691,15 @@ static void g4x_set_infoframes(struct intel_encoder *encoder,
> I915_WRITE(reg, val);
> POSTING_READ(reg);
>
> - intel_hdmi_set_avi_infoframe(encoder, crtc_state, conn_state);
> - intel_hdmi_set_spd_infoframe(encoder, crtc_state);
> - intel_hdmi_set_hdmi_infoframe(encoder, crtc_state, conn_state);
> + intel_write_infoframe(encoder, crtc_state,
> + HDMI_INFOFRAME_TYPE_AVI,
> + &crtc_state->infoframes.avi);
> + intel_write_infoframe(encoder, crtc_state,
> + HDMI_INFOFRAME_TYPE_SPD,
> + &crtc_state->infoframes.spd);
> + intel_write_infoframe(encoder, crtc_state,
> + HDMI_INFOFRAME_TYPE_VENDOR,
> + &crtc_state->infoframes.hdmi);
> }
>
> static bool hdmi_sink_is_deep_color(const struct drm_connector_state *conn_state)
> @@ -713,7 +765,10 @@ static bool intel_hdmi_set_gcp_infoframe(struct intel_encoder *encoder,
> struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
> struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
> i915_reg_t reg;
> - u32 val = 0;
> +
> + if ((crtc_state->infoframes.enable &
> + intel_hdmi_infoframe_enable(HDMI_PACKET_TYPE_GENERAL_CONTROL)) == 0)
> + return false;
>
> if (HAS_DDI(dev_priv))
> reg = HSW_TVIDEO_DIP_GCP(crtc_state->cpu_transcoder);
> @@ -724,18 +779,31 @@ static bool intel_hdmi_set_gcp_infoframe(struct intel_encoder *encoder,
> else
> return false;
>
> + I915_WRITE(reg, crtc_state->infoframes.gcp);
> +
> + return true;
> +}
> +
> +static void intel_hdmi_compute_gcp_infoframe(struct intel_encoder *encoder,
> + struct intel_crtc_state *crtc_state,
> + struct drm_connector_state *conn_state)
> +{
> + struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
> +
> + if (IS_G4X(dev_priv) || !crtc_state->has_infoframe)
> + return;
> +
> + crtc_state->infoframes.enable |=
> + intel_hdmi_infoframe_enable(HDMI_PACKET_TYPE_GENERAL_CONTROL);
> +
> /* Indicate color depth whenever the sink supports deep color */
> if (hdmi_sink_is_deep_color(conn_state))
> - val |= GCP_COLOR_INDICATION;
> + crtc_state->infoframes.gcp |= GCP_COLOR_INDICATION;
>
> /* Enable default_phase whenever the display mode is suitably aligned */
> if (gcp_default_phase_possible(crtc_state->pipe_bpp,
> &crtc_state->base.adjusted_mode))
> - val |= GCP_DEFAULT_PHASE_ENABLE;
> -
> - I915_WRITE(reg, val);
> -
> - return val != 0;
> + crtc_state->infoframes.gcp |= GCP_DEFAULT_PHASE_ENABLE;
> }
>
> static void ibx_set_infoframes(struct intel_encoder *encoder,
> @@ -786,9 +854,15 @@ static void ibx_set_infoframes(struct intel_encoder *encoder,
> I915_WRITE(reg, val);
> POSTING_READ(reg);
>
> - intel_hdmi_set_avi_infoframe(encoder, crtc_state, conn_state);
> - intel_hdmi_set_spd_infoframe(encoder, crtc_state);
> - intel_hdmi_set_hdmi_infoframe(encoder, crtc_state, conn_state);
> + intel_write_infoframe(encoder, crtc_state,
> + HDMI_INFOFRAME_TYPE_AVI,
> + &crtc_state->infoframes.avi);
> + intel_write_infoframe(encoder, crtc_state,
> + HDMI_INFOFRAME_TYPE_SPD,
> + &crtc_state->infoframes.spd);
> + intel_write_infoframe(encoder, crtc_state,
> + HDMI_INFOFRAME_TYPE_VENDOR,
> + &crtc_state->infoframes.hdmi);
> }
>
> static void cpt_set_infoframes(struct intel_encoder *encoder,
> @@ -829,9 +903,15 @@ static void cpt_set_infoframes(struct intel_encoder *encoder,
> I915_WRITE(reg, val);
> POSTING_READ(reg);
>
> - intel_hdmi_set_avi_infoframe(encoder, crtc_state, conn_state);
> - intel_hdmi_set_spd_infoframe(encoder, crtc_state);
> - intel_hdmi_set_hdmi_infoframe(encoder, crtc_state, conn_state);
> + intel_write_infoframe(encoder, crtc_state,
> + HDMI_INFOFRAME_TYPE_AVI,
> + &crtc_state->infoframes.avi);
> + intel_write_infoframe(encoder, crtc_state,
> + HDMI_INFOFRAME_TYPE_SPD,
> + &crtc_state->infoframes.spd);
> + intel_write_infoframe(encoder, crtc_state,
> + HDMI_INFOFRAME_TYPE_VENDOR,
> + &crtc_state->infoframes.hdmi);
> }
>
> static void vlv_set_infoframes(struct intel_encoder *encoder,
> @@ -881,9 +961,15 @@ static void vlv_set_infoframes(struct intel_encoder *encoder,
> I915_WRITE(reg, val);
> POSTING_READ(reg);
>
> - intel_hdmi_set_avi_infoframe(encoder, crtc_state, conn_state);
> - intel_hdmi_set_spd_infoframe(encoder, crtc_state);
> - intel_hdmi_set_hdmi_infoframe(encoder, crtc_state, conn_state);
> + intel_write_infoframe(encoder, crtc_state,
> + HDMI_INFOFRAME_TYPE_AVI,
> + &crtc_state->infoframes.avi);
> + intel_write_infoframe(encoder, crtc_state,
> + HDMI_INFOFRAME_TYPE_SPD,
> + &crtc_state->infoframes.spd);
> + intel_write_infoframe(encoder, crtc_state,
> + HDMI_INFOFRAME_TYPE_VENDOR,
> + &crtc_state->infoframes.hdmi);
> }
>
> static void hsw_set_infoframes(struct intel_encoder *encoder,
> @@ -914,9 +1000,15 @@ static void hsw_set_infoframes(struct intel_encoder *encoder,
> I915_WRITE(reg, val);
> POSTING_READ(reg);
>
> - intel_hdmi_set_avi_infoframe(encoder, crtc_state, conn_state);
> - intel_hdmi_set_spd_infoframe(encoder, crtc_state);
> - intel_hdmi_set_hdmi_infoframe(encoder, crtc_state, conn_state);
> + intel_write_infoframe(encoder, crtc_state,
> + HDMI_INFOFRAME_TYPE_AVI,
> + &crtc_state->infoframes.avi);
> + intel_write_infoframe(encoder, crtc_state,
> + HDMI_INFOFRAME_TYPE_SPD,
> + &crtc_state->infoframes.spd);
> + intel_write_infoframe(encoder, crtc_state,
> + HDMI_INFOFRAME_TYPE_VENDOR,
> + &crtc_state->infoframes.hdmi);
> }
>
> void intel_dp_dual_mode_set_tmds_output(struct intel_hdmi *hdmi, bool enable)
> @@ -1851,6 +1943,27 @@ bool intel_hdmi_compute_config(struct intel_encoder *encoder,
> }
> }
>
> + if (pipe_config->has_hdmi_sink)
> + pipe_config->infoframes.enable |=
> + intel_hdmi_infoframe_enable(HDMI_PACKET_TYPE_NULL);
> +
> + intel_hdmi_compute_gcp_infoframe(encoder, pipe_config, conn_state);
> +
> + if (!intel_hdmi_compute_avi_infoframe(encoder, pipe_config, conn_state)) {
> + DRM_DEBUG_KMS("bad AVI infoframe\n");
> + return false;
> + }
> +
> + if (!intel_hdmi_compute_spd_infoframe(encoder, pipe_config, conn_state)) {
> + DRM_DEBUG_KMS("bad SPD infoframe\n");
> + return false;
> + }
> +
> + if (!intel_hdmi_compute_hdmi_infoframe(encoder, pipe_config, conn_state)) {
> + DRM_DEBUG_KMS("bad HDMI infoframe\n");
> + return false;
> + }
> +
> return true;
> }
>
> --
> 2.16.4
>
> _______________________________________________
> Intel-gfx mailing list
> Intel-gfx@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/intel-gfx

--
Daniel Vetter
Software Engineer, Intel Corporation