The main goal of this series is the final patch in the series: to allow test code to reliably find out if we ended up hitting the "fallback" case of the generic edp-panel driver where we don't recognize a panel and choose to use super conservative timing. Version 1 of the patch actually landed but was quickly reverted since it was pointed out that it should have been done in debugfs, not sysfs. As discussed on IRC [1], we want this support to be under the "connector" directory of debugfs but there was no existing way to do that. Thus patch #2 in the series was born to try to plumb this through. It was asserted that it would be OK to rely on a fairly modern display pipeline for this plumbing and perhaps fail to populate the debugfs file if we're using older/deprecated pipelines. Patch #1 in the series was born because the bridge chip I was using was still using an older/deprecated pipeline. While this doesn't get us fully to a modern pipeline for ti-sn65dsi86 (it still doesn't move to "NO_CONNECTOR") it hopefully moves us in the right direction. This was tested on sc7180-trogdor devices with _both_ the ti-sn65dsi86 and the parade-ps8640 bridge chips (since some devices have one, some the other). The parade-ps8640 already uses supports "NO_CONNECTOR", luckily. [1] https://people.freedesktop.org/~cbrill/dri-log/?channel=dri-devel&date=2022-02-02 Changes in v2: - ("ti-sn65dsi86: Use drm_bridge_connector") new for v2. - ("drm: Plumb debugfs_init through to panels") new for v2. - Now using debugfs, not sysfs Douglas Anderson (3): drm/bridge: ti-sn65dsi86: Use drm_bridge_connector drm: Plumb debugfs_init through to panels drm/panel-edp: Allow querying the detected panel via debugfs drivers/gpu/drm/bridge/panel.c | 12 +++++ drivers/gpu/drm/bridge/ti-sn65dsi86.c | 72 +++++--------------------- drivers/gpu/drm/drm_bridge_connector.c | 15 ++++++ drivers/gpu/drm/drm_debugfs.c | 3 ++ drivers/gpu/drm/panel/panel-edp.c | 37 +++++++++++-- include/drm/drm_bridge.h | 7 +++ include/drm/drm_connector.h | 7 +++ include/drm/drm_panel.h | 8 +++ 8 files changed, 98 insertions(+), 63 deletions(-) -- 2.35.0.263.gb82422642f-goog
