Attachment 123611 Details for Bug 95206 – add debugging output

[patch] add debugging output

0001-drm-radeon-add-debugging-output-for-bug-95206.patch (text/plain), 1.99 KB, created by Alex Deucher on 2016-05-10 20:36:47 UTC

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Creator: Alex Deucher

Created: 2016-05-10 20:36:47 UTC

Size: 1.99 KB

patch

obsolete

>From 73db8ff9b358f36cd4b34881d3688d931ed85449 Mon Sep 17 00:00:00 2001
>From: Alex Deucher <alexander.deucher@amd.com>
>Date: Tue, 10 May 2016 16:35:28 -0400
>Subject: [PATCH] drm/radeon: add debugging output for bug 95206
>
>Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
>---
> drivers/gpu/drm/radeon/atombios_dp.c | 13 ++++++++++++-
> 1 file changed, 12 insertions(+), 1 deletion(-)
>
>diff --git a/drivers/gpu/drm/radeon/atombios_dp.c b/drivers/gpu/drm/radeon/atombios_dp.c
>index afa9db1..0b50cf3 100644
>--- a/drivers/gpu/drm/radeon/atombios_dp.c
>+++ b/drivers/gpu/drm/radeon/atombios_dp.c
>@@ -315,6 +315,10 @@ int radeon_dp_get_dp_link_config(struct drm_connector *connector,
> 	unsigned max_lane_num = drm_dp_max_lane_count(dpcd);
> 	unsigned lane_num, i, max_pix_clock;
> 
>+
>+	DRM_INFO("pix_clock %u, max_link_rate %u, max_lane_num %u\n",
>+		 pix_clock, max_link_rate, max_lane_num);
>+
> 	if (radeon_connector_encoder_get_dp_bridge_encoder_id(connector) ==
> 	    ENCODER_OBJECT_ID_NUTMEG) {
> 		for (lane_num = 1; lane_num <= max_lane_num; lane_num <<= 1) {
>@@ -332,12 +336,14 @@ int radeon_dp_get_dp_link_config(struct drm_connector *connector,
> 				if (max_pix_clock >= pix_clock) {
> 					*dp_lanes = lane_num;
> 					*dp_rate = link_rates[i];
>+					DRM_INFO("selected %u lanes %u rate\n", *dp_lanes, *dp_rate);
> 					return 0;
> 				}
> 			}
> 		}
> 	}
> 
>+	DRM_INFO("radeon_dp_get_dp_link_config failed\n");
> 	return -EINVAL;
> }
> 
>@@ -492,12 +498,17 @@ int radeon_dp_mode_valid_helper(struct drm_connector *connector,
> 		return MODE_CLOCK_HIGH;
> 	dig_connector = radeon_connector->con_priv;
> 
>+	DRM_INFO("radeon_dp_mode_valid_helper: %ux%u %u\n",
>+		 mode->hdisplay, mode->vdisplay, mode->clock);
>+
> 	ret = radeon_dp_get_dp_link_config(connector, dig_connector->dpcd,
> 					   mode->clock,
> 					   &dp_lanes,
> 					   &dp_clock);
>-	if (ret)
>+	if (ret) {
>+		DRM_INFO("radeon_dp_get_dp_link_config %d\n", ret);
> 		return MODE_CLOCK_HIGH;
>+	}
> 
> 	if ((dp_clock == 540000) &&
> 	    (!radeon_connector_is_dp12_capable(connector)))
>-- 
>2.5.5
>

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Attachments on bug 95206: 123350 | 123351 | 123352 | 123611 | 123618 | 123629

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