[PATCH v10 20/69] drm/display: hdmi-state-helper: Add source TMDS rate validation
Cristian Ciocaltea <[email protected]> Fri, 31 Jul 2026 19:19:27 +0300
| Newsgroups | org.infradead.lists.linux-rockchip,dev.linux.lists.linux-sunxi,org.freedesktop.lists.dri-devel,org.infradead.lists.linux-arm-kernel,org.kernel.vger.linux-kernel |
|---|---|
| Message-ID | <[email protected]> |
Validate the computed TMDS character rate against connector->hdmi.max_tmds_char_rate, when provided by the driver/source. This gives HDMI connectors common support for rejecting modes whose TMDS character rate exceeds the source supported limit, while still allowing drivers with custom validation requirements to implement their own tmds_char_rate_valid() callback. Tested-by: Maud Spierings <[email protected]> Tested-by: Diederik de Haas <[email protected]> # NanoPC-T6 LTS, Rock 5B Signed-off-by: Cristian Ciocaltea <[email protected]> --- drivers/gpu/drm/display/drm_hdmi_state_helper.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/gpu/drm/display/drm_hdmi_state_helper.c b/drivers/gpu/drm/display/drm_hdmi_state_helper.c index ce17eeefc2da..92be6278ea44 100644 --- a/drivers/gpu/drm/display/drm_hdmi_state_helper.c +++ b/drivers/gpu/drm/display/drm_hdmi_state_helper.c @@ -560,6 +560,10 @@ hdmi_clock_valid(const struct drm_connector *connector, if (info->max_tmds_clock && clock > info->max_tmds_clock * 1000) return MODE_CLOCK_HIGH; + if (connector->hdmi.max_tmds_char_rate && + clock > connector->hdmi.max_tmds_char_rate) + return MODE_CLOCK_HIGH; + if (funcs && funcs->tmds_char_rate_valid) { enum drm_mode_status status; -- 2.55.0 _______________________________________________ Linux-rockchip mailing list [email protected] http://lists.infradead.org/mailman/listinfo/linux-rockchip