On Thu, 12 Sep 2024, Thomas Zimmermann <tzimmerm...@suse.de> wrote: > Hi > > Am 11.09.24 um 20:06 schrieb Tejas Vipin: >> Replace drm_detect_hdmi_monitor() with drm_display_info.is_hdmi since >> monitor HDMI information is available after EDID is parsed. Additionally >> rewrite the code the code to have fewer indentation levels. > > The problem is that the entire logic is outdated. The content > of cdv_hdmi_detect() should go into cdv_hdmi_get_modes(), the detect_ctx > callback should be set to drm_connector_helper_detect_from_ddc() and > cdv_hdmi_detect() should be deleted. The result is that ->detect_ctx > will detect the presence of a display and ->get_modes will update EDID > and other properties.
I guess I didn't get the memo on this one. What's the problem with reading the EDID at detect? The subsequent drm_edid_connector_add_modes() called from .get_modes() does not need to read the EDID again. I think it should be fine to do incremental refactors like the patch at hand (modulo some issues I mention below). BR, Jani. > > Do you have a device for testing such a change? > > Best regards > Thomas > >> >> Signed-off-by: Tejas Vipin <tejasvipi...@gmail.com> >> --- >> Changes in v2: >> - Use drm_edid instead of edid >> >> Link to v1: >> https://lore.kernel.org/all/20240910051856.700210-1-tejasvipi...@gmail.com/ >> --- >> drivers/gpu/drm/gma500/cdv_intel_hdmi.c | 24 +++++++++++++----------- >> 1 file changed, 13 insertions(+), 11 deletions(-) >> >> diff --git a/drivers/gpu/drm/gma500/cdv_intel_hdmi.c >> b/drivers/gpu/drm/gma500/cdv_intel_hdmi.c >> index 2d95e0471291..701f8bbd5f2b 100644 >> --- a/drivers/gpu/drm/gma500/cdv_intel_hdmi.c >> +++ b/drivers/gpu/drm/gma500/cdv_intel_hdmi.c >> @@ -128,23 +128,25 @@ static enum drm_connector_status cdv_hdmi_detect( >> { >> struct gma_encoder *gma_encoder = gma_attached_encoder(connector); >> struct mid_intel_hdmi_priv *hdmi_priv = gma_encoder->dev_priv; >> - struct edid *edid = NULL; >> + const struct drm_edid *drm_edid; >> + int ret; >> enum drm_connector_status status = connector_status_disconnected; >> >> - edid = drm_get_edid(connector, connector->ddc); >> + drm_edid = drm_edid_read_ddc(connector, connector->ddc); Just drm_edid_read() is enough when you're using connector->ddc. >> + ret = drm_edid_connector_update(connector, drm_edid); >> >> hdmi_priv->has_hdmi_sink = false; >> hdmi_priv->has_hdmi_audio = false; >> - if (edid) { >> - if (edid->input & DRM_EDID_INPUT_DIGITAL) { >> - status = connector_status_connected; >> - hdmi_priv->has_hdmi_sink = >> - drm_detect_hdmi_monitor(edid); >> - hdmi_priv->has_hdmi_audio = >> - drm_detect_monitor_audio(edid); >> - } >> - kfree(edid); >> + if (ret) This error path leaks the EDID. >> + return status; >> + >> + if (drm_edid_is_digital(drm_edid)) { >> + status = connector_status_connected; >> + hdmi_priv->has_hdmi_sink = connector->display_info.is_hdmi; >> + hdmi_priv->has_hdmi_audio = connector->display_info.has_audio; >> } >> + drm_edid_free(drm_edid); >> + >> return status; >> } >> -- Jani Nikula, Intel
