[PATCH] radeon: disallow glamor on pre-R600 asics

[Alex Deucher]

I'm not sure they can handle the shaders properly, especially
only older parts like r300.

This will avoid display corruption problems reported by people
using glamor on older asics by falling back to EXA if they try
and enable glamor.

Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
---
 src/radeon_glamor.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/radeon_glamor.c b/src/radeon_glamor.c
index d527900..7f00d5b 100644
--- a/src/radeon_glamor.c
+++ b/src/radeon_glamor.c
@@ -93,6 +93,12 @@ radeon_glamor_pre_init(ScrnInfoPtr scrn)
 	if (s && strcasecmp(s, "glamor") != 0)
 		return FALSE;
 
+	if (info->ChipFamily < CHIP_FAMILY_R600) {
+		xf86DrvMsg(scrn->scrnIndex, s ? X_ERROR : X_WARNING,
+			   "glamor requires R600 or newer GPU, disabling.\n");
+		return FALSE;
+	}
+
 	if (scrn->depth < 24) {
 		xf86DrvMsg(scrn->scrnIndex, s ? X_ERROR : X_WARNING,
 			   "glamor requires depth >= 24, disabling.\n");
-- 
1.8.3.1