From: Jani Nikula Date: Mon, 2 Jun 2014 13:58:30 +0000 (+0300) Subject: drm/i915: tell the user if both KMS and UMS are disabled X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=c9cd7b65db50175a5f1ff64bbad6d5affdad6aba;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git drm/i915: tell the user if both KMS and UMS are disabled If both KMS is disabled (by i915.modeset=0 or nomodeset parameters) and UMS is disabled (by CONFIG_DRM_I915_UMS=n, the default), the user might not be aware his setup is not supported. Inform the users (and, by extension, the poor i915 developers having to read their dmesgs in bug reports) why their graphics experience might be lacking. A similar message was added on the UMS path in commit e147accbd19f55489dabdcc4dc3551cc3e3f2553 Author: Jani Nikula Date: Thu Oct 10 15:25:37 2013 +0300 drm/i915: tell the user KMS is required for gen6+ but it won't be reached if CONFIG_DRM_I915_UMS=n since commit b30324adaf8d2e5950a602bde63030d15a61826f Author: Daniel Vetter Date: Wed Nov 13 22:11:25 2013 +0100 drm/i915: Deprecated UMS support v2: Use DRM_DEBUG_DRIVER. Signed-off-by: Jani Nikula Signed-off-by: Daniel Vetter --- diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c index 481d2a14cdc6..fa7138215b56 100644 --- a/drivers/gpu/drm/i915/i915_drv.c +++ b/drivers/gpu/drm/i915/i915_drv.c @@ -1583,6 +1583,7 @@ static int __init i915_init(void) driver.get_vblank_timestamp = NULL; #ifndef CONFIG_DRM_I915_UMS /* Silently fail loading to not upset userspace. */ + DRM_DEBUG_DRIVER("KMS and UMS disabled.\n"); return 0; #endif }