[PATCH 1/1] UBUNTU: SAUCE: drm/i915: Allow frame buffers up to 4096x4096 on 915/945 class hardware

[Andy Whitcroft]

From: Keith Packard <keithp at keithp.com>

commit 5e4d6fa72619aeea271d2ad704757717b06e291a upstream

The 915 and 945 scanout engines can handle frame buffers up to 4096 pixels
wide. Pre-9xx hardware has an 8192 byte stride limit, and so we leave the
existing 2048 max in place.

I'm not sure why we limit the height to the same value; there's no intrinsic
hardware limit in the scanout engine.

BugLink: http://bugs.launchpad.net/bugs/351756

Signed-off-by: Keith Packard <keithp at keithp.com>
Signed-off-by: Eric Anholt <eric at anholt.net>
Signed-off-by: Andy Whitcroft <apw at canonical.com>
---
 drivers/gpu/drm/i915/intel_display.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 508838e..7b49809 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -3148,6 +3148,9 @@ void intel_modeset_init(struct drm_device *dev)
 	if (IS_I965G(dev)) {
 		dev->mode_config.max_width = 8192;
 		dev->mode_config.max_height = 8192;
+	} else if (IS_I9XX(dev)) {
+		dev->mode_config.max_width = 4096;
+		dev->mode_config.max_height = 4096;
 	} else {
 		dev->mode_config.max_width = 2048;
 		dev->mode_config.max_height = 2048;
-- 
1.6.3.rc3.199.g24398