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drm/i915/sdvo: Actually print the reason why the SDVO command failed

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It's much easier to figure out why the SDVO encoder refuses to cooperate
if we can see what status we got back.

v2: Zero initialize only the first character, not the whole buffer

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> #v1
Link: https://patchwork.freedesktop.org/patch/msgid/20190410170941.28142-1-ville.syrjala@linux.intel.com
This commit is contained in:
Ville Syrjälä
2019-04-10 20:09:41 +03:00
parent 7f668346e7
commit bca29283dc
1 changed files with 3 additions and 1 deletions
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4
drivers/gpu/drm/i915/intel_sdvo.c
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@@ -522,6 +522,7 @@ static bool intel_sdvo_read_response(struct intel_sdvo *intel_sdvo,
#define BUF_LEN 256
char buffer[BUF_LEN];
buffer[0] = '\0';
/*
* The documentation states that all commands will be
@@ -585,7 +586,8 @@ static bool intel_sdvo_read_response(struct intel_sdvo *intel_sdvo,
return true;
log_fail:
DRM_DEBUG_KMS("%s: R: ... failed\n", SDVO_NAME(intel_sdvo));
DRM_DEBUG_KMS("%s: R: ... failed %s\n",
SDVO_NAME(intel_sdvo), buffer);
return false;
}