On Mon, Aug 05, 2013 at 04:12:11PM +0300, Ville Syrjälä wrote:
> > static void intel_set_infoframe(struct drm_encoder *encoder,
> > - struct dip_infoframe *frame)
> > + union hdmi_infoframe *frame)
> > {
> > struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder);
> > + uint8_t buffer[DIP_BUFFER_SIZE];
> > + ssize_t len;
> > +
> > + memset(buffer, 0, sizeof(buffer));
>
> Could just zero initialize 'buffer' when declaring it. However
> hdmi_*_infoframe_pack() already contain a memset(), so we shouldn't even
> need to zero it here.
There was a good, admittedly well hidden, reason for this one. _pack()
only zeroes up to the size of the infoframe and _write_infoframe() makes
sure sure to write 0s dwords after the infoframe (rounded up to a
multiple of 4) for the checksum. Without it we're left with
4 - (infoframe_size % 4) bytes of garbage in the infoframe data.
The new series makes the hdmi _pack helpers zero the whole incoming
buffer instead, I think it makes sense.
--
Damien
>
> > +
> > + /* see comment above for the reason for this offset */
> > + len = hdmi_infoframe_pack(frame, buffer + 1, sizeof(buffer) - 1);
> > + if (len < 0)
> > + return;
> >
> > - intel_dip_infoframe_csum(frame);
> > - intel_hdmi->write_infoframe(encoder, frame->type, (uint8_t *)frame,
> > - DIP_HEADER_SIZE + frame->len);
> > + /* Insert the 'hole' (see big comment above) at position 3 */
> > + buffer[0] = buffer[1];
> > + buffer[1] = buffer[2];
> > + buffer[2] = buffer[3];
> > + buffer[3] = 0;
> > + len++;
> > +
> > + intel_hdmi->write_infoframe(encoder, frame->any.type, buffer, len);
> > }
> >
> > static void intel_hdmi_set_avi_infoframe(struct drm_encoder *encoder,
> > @@ -343,40 +384,45 @@ static void intel_hdmi_set_avi_infoframe(struct drm_encoder *encoder,
> > {
> > struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder);
> > struct intel_crtc *intel_crtc = to_intel_crtc(encoder->crtc);
> > - struct dip_infoframe avi_if = {
> > - .type = DIP_TYPE_AVI,
> > - .ver = DIP_VERSION_AVI,
> > - .len = DIP_LEN_AVI,
> > - };
> > + union hdmi_infoframe frame;
> > + int ret;
> > +
> > + ret = drm_hdmi_avi_infoframe_from_display_mode(&frame.avi,
> > + adjusted_mode);
> > + if (ret < 0) {
> > + DRM_ERROR("couldn't fill AVI infoframe\n");
> > + return;
> > + }
> >
> > if (adjusted_mode->flags & DRM_MODE_FLAG_DBLCLK)
> > - avi_if.body.avi.YQ_CN_PR |= DIP_AVI_PR_2;
> > + frame.avi.pixel_repeat = 1;
>
> Perhaps that should be part of drm_hdmi_avi_infoframe_from_display_mode()?
>
> >
> > if (intel_hdmi->rgb_quant_range_selectable) {
> > if (intel_crtc->config.limited_color_range)
> > - avi_if.body.avi.ITC_EC_Q_SC |= DIP_AVI_RGB_QUANT_RANGE_LIMITED;
> > + frame.avi.quantization_range =
> > + HDMI_QUANTIZATION_RANGE_LIMITED;
> > else
> > - avi_if.body.avi.ITC_EC_Q_SC |= DIP_AVI_RGB_QUANT_RANGE_FULL;
> > + frame.avi.quantization_range =
> > + HDMI_QUANTIZATION_RANGE_FULL;
> > }
> >
> > - avi_if.body.avi.VIC = drm_match_cea_mode(adjusted_mode);
> > -
> > - intel_set_infoframe(encoder, &avi_if);
> > + intel_set_infoframe(encoder, &frame);
> > }
> >
> > static void intel_hdmi_set_spd_infoframe(struct drm_encoder *encoder)
> > {
> > - struct dip_infoframe spd_if;
> > + union hdmi_infoframe frame;
> > + int ret;
> > +
> > + ret = hdmi_spd_infoframe_init(&frame.spd, "Intel", "Integrated gfx");
> > + if (ret < 0) {
> > + DRM_ERROR("couldn't fill SPD infoframe\n");
> > + return;
> > + }
> >
> > - memset(&spd_if, 0, sizeof(spd_if));
> > - spd_if.type = DIP_TYPE_SPD;
> > - spd_if.ver = DIP_VERSION_SPD;
> > - spd_if.len = DIP_LEN_SPD;
> > - strcpy(spd_if.body.spd.vn, "Intel");
> > - strcpy(spd_if.body.spd.pd, "Integrated gfx");
> > - spd_if.body.spd.sdi = DIP_SPD_PC;
> > + frame.spd.sdi = HDMI_SPD_SDI_PC;
> >
> > - intel_set_infoframe(encoder, &spd_if);
> > + intel_set_infoframe(encoder, &frame);
> > }
> >
> > static void g4x_set_infoframes(struct drm_encoder *encoder,
> > --
> > 1.8.3.1
> >
> > _______________________________________________
> > Intel-gfx mailing list
> > Intel-gfx@xxxxxxxxxxxxxxxxxxxxx
> > http://lists.freedesktop.org/mailman/listinfo/intel-gfx
>
> --
> Ville Syrjälä
> Intel OTC
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