From 84fcb46977e57bafba40bde32067bacc1e510f9c Mon Sep 17 00:00:00 2001 From: Daniel Vetter Date: Wed, 27 Nov 2013 16:03:01 +0100 Subject: [PATCH] drm/i915/sdvo: Fix up debug output to not split lines It leads to a big mess when stuff interleaves. Especially with the new patch I've submitted for the drm core to no longer artificially split up debug messages. v2: The size parameter to snprintf includes the terminating 0, but the return value does not. Adjust the logic accordingly. Spotted by Mika. Cc: Mika Kuoppala Reviewed-by: Mika Kuoppala Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/intel_sdvo.c | 55 +++++++++++++++++++++---------- 1 file changed, 37 insertions(+), 18 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_sdvo.c b/drivers/gpu/drm/i915/intel_sdvo.c index a583e8f718a7..e4f9918ab859 100644 --- a/drivers/gpu/drm/i915/intel_sdvo.c +++ b/drivers/gpu/drm/i915/intel_sdvo.c @@ -413,23 +413,34 @@ static const struct _sdvo_cmd_name { static void intel_sdvo_debug_write(struct intel_sdvo *intel_sdvo, u8 cmd, const void *args, int args_len) { - int i; + int i, pos = 0; +#define BUF_LEN 256 + char buffer[BUF_LEN]; + +#define BUF_PRINT(args...) \ + pos += snprintf(buffer + pos, max_t(int, BUF_LEN - pos, 0), args) + - DRM_DEBUG_KMS("%s: W: %02X ", - SDVO_NAME(intel_sdvo), cmd); - for (i = 0; i < args_len; i++) - DRM_LOG_KMS("%02X ", ((u8 *)args)[i]); - for (; i < 8; i++) - DRM_LOG_KMS(" "); + for (i = 0; i < args_len; i++) { + BUF_PRINT("%02X ", ((u8 *)args)[i]); + } + for (; i < 8; i++) { + BUF_PRINT(" "); + } for (i = 0; i < ARRAY_SIZE(sdvo_cmd_names); i++) { if (cmd == sdvo_cmd_names[i].cmd) { - DRM_LOG_KMS("(%s)", sdvo_cmd_names[i].name); + BUF_PRINT("(%s)", sdvo_cmd_names[i].name); break; } } - if (i == ARRAY_SIZE(sdvo_cmd_names)) - DRM_LOG_KMS("(%02X)", cmd); - DRM_LOG_KMS("\n"); + if (i == ARRAY_SIZE(sdvo_cmd_names)) { + BUF_PRINT("(%02X)", cmd); + } + BUG_ON(pos >= BUF_LEN - 1); +#undef BUF_PRINT +#undef BUF_LEN + + DRM_DEBUG_KMS("%s: W: %02X %s\n", SDVO_NAME(intel_sdvo), cmd, buffer); } static const char *cmd_status_names[] = { @@ -512,9 +523,10 @@ static bool intel_sdvo_read_response(struct intel_sdvo *intel_sdvo, { u8 retry = 15; /* 5 quick checks, followed by 10 long checks */ u8 status; - int i; + int i, pos = 0; +#define BUF_LEN 256 + char buffer[BUF_LEN]; - DRM_DEBUG_KMS("%s: R: ", SDVO_NAME(intel_sdvo)); /* * The documentation states that all commands will be @@ -551,10 +563,13 @@ static bool intel_sdvo_read_response(struct intel_sdvo *intel_sdvo, goto log_fail; } +#define BUF_PRINT(args...) \ + pos += snprintf(buffer + pos, max_t(int, BUF_LEN - pos, 0), args) + if (status <= SDVO_CMD_STATUS_SCALING_NOT_SUPP) - DRM_LOG_KMS("(%s)", cmd_status_names[status]); + BUF_PRINT("(%s)", cmd_status_names[status]); else - DRM_LOG_KMS("(??? %d)", status); + BUF_PRINT("(??? %d)", status); if (status != SDVO_CMD_STATUS_SUCCESS) goto log_fail; @@ -565,13 +580,17 @@ static bool intel_sdvo_read_response(struct intel_sdvo *intel_sdvo, SDVO_I2C_RETURN_0 + i, &((u8 *)response)[i])) goto log_fail; - DRM_LOG_KMS(" %02X", ((u8 *)response)[i]); + BUF_PRINT(" %02X", ((u8 *)response)[i]); } - DRM_LOG_KMS("\n"); + BUG_ON(pos >= BUF_LEN - 1); +#undef BUF_PRINT +#undef BUF_LEN + + DRM_DEBUG_KMS("%s: R: %s\n", SDVO_NAME(intel_sdvo), buffer); return true; log_fail: - DRM_LOG_KMS("... failed\n"); + DRM_DEBUG_KMS("%s: R: ... failed\n", SDVO_NAME(intel_sdvo)); return false; } -- 2.30.2