radv: Add startup debug option.

This adds a RADV_DEBUG=startup option to dump more info about
instance creation and device enumeration.

A common question end users have is why the direver is not loading
for them, and this has two common reasons:
1) They did not install the driver.
2) AMDGPU is not used for the card in the kernel.

This adds some info messages so we can easily get a some useful
output from end users.

Reviewed-by: Timothy Arceri <[email protected]>
Reviewed-by: Samuel Pitoiset <[email protected]>

1 files changed, 20 insertions, 0 deletions

diff --git a/src/amd/vulkan/radv_util.c b/src/amd/vulkan/radv_util.c
index 2af7da6c6cc..72bedc687d4 100644
--- a/src/amd/vulkan/radv_util.c
+++ b/src/amd/vulkan/radv_util.c
@@ -54,6 +54,26 @@ radv_loge_v(const char *format, va_list va)
 	fprintf(stderr, "\n");
 }
 
+/** Log an error message.  */
+void radv_printflike(1, 2)
+	radv_logi(const char *format, ...)
+{
+	va_list va;
+
+	va_start(va, format);
+	radv_logi_v(format, va);
+	va_end(va);
+}
+
+/** \see radv_logi() */
+void
+radv_logi_v(const char *format, va_list va)
+{
+	fprintf(stderr, "radv: info: ");
+	vfprintf(stderr, format, va);
+	fprintf(stderr, "\n");
+}
+
 void radv_printflike(3, 4)
 	__radv_finishme(const char *file, int line, const char *format, ...)
 {