@@ -201,6 +201,8 @@ intel_dp_mode_valid(struct drm_connector *connector,
int max_rate, mode_rate, max_lanes, max_link_clock;
int max_dotclk = to_i915(connector->dev)->max_dotclk_freq;
+ max_dotclk = drm_dp_max_sink_dotclock(max_dotclk, &intel_dp->bd);
+
if (is_edp(intel_dp) && fixed_mode) {
if (mode->hdisplay > fixed_mode->hdisplay)
return MODE_PANEL;
@@ -4576,6 +4578,7 @@ intel_dp_hpd_pulse(struct intel_digital_port *intel_dig_port, bool long_hpd)
struct drm_i915_private *dev_priv = dev->dev_private;
enum intel_display_power_domain power_domain;
enum irqreturn ret = IRQ_NONE;
+ int err;
if (intel_dig_port->base.type != INTEL_OUTPUT_EDP &&
intel_dig_port->base.type != INTEL_OUTPUT_HDMI)
@@ -4600,6 +4603,10 @@ intel_dp_hpd_pulse(struct intel_digital_port *intel_dig_port, bool long_hpd)
power_domain = intel_display_port_aux_power_domain(intel_encoder);
intel_display_power_get(dev_priv, power_domain);
+ err = drm_dp_bd(&intel_dp->aux, &intel_dp->bd);
+ if (err < 0)
+ DRM_DEBUG_KMS("error reading DPCD[0x80] for DP branch device\n");
+
if (long_hpd) {
/* indicate that we need to restart link training */
intel_dp->train_set_valid = false;
Prep work to improve DP branch device handling. Filter out a mode that exceeds the max pixel rate setting for DP to VGA dongle. This is defined in DPCD register 0x81 if detailed cap info i.e. info field is 4 bytes long and it is available for DP downstream port. The register defines the pixel rate divided by 8 in MP/s. v2: DPCD read outs and computation moved to drm (Ville, Daniel) v3: Sink pixel rate computation moved to drm_dp_max_sink_dotclock() function (Daniel) Signed-off-by: Mika Kahola <mika.kahola@intel.com> --- drivers/gpu/drm/i915/intel_dp.c | 7 +++++++ 1 file changed, 7 insertions(+)