7001-drm-i915-fbdev-Discard-BIOS-framebuffers-exceeding-h.patch

From 506daf9b9e8b62789a2b1ca73e22a80b345aad0a Mon Sep 17 00:00:00 2001
From: Aun-Ali Zaidi <admin@kodeit.net>
Date: Wed, 16 Sep 2020 18:31:10 -0500
Subject: [PATCH] drm/i915/fbdev: Discard BIOS framebuffers exceeding hardware
 supported size

On certain devices with high-DPI panels, the BIOS supplied framebuffer is larger
than what is physically supported by the panel, resulting in overscan. A previous
check introduced with edd586fe ("drm/i915: Discard BIOS framebuffers too small to
accommodate chosen mode"), handles the lower bound case. We extend that check
to include the upper bound case.

Signed-off-by: Aun-Ali Zaidi <admin@kodeit.net>
---
 drivers/gpu/drm/i915/display/intel_fbdev.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/display/intel_fbdev.c b/drivers/gpu/drm/i915/display/intel_fbdev.c
index 3bc804212a99..fc385d067d2f 100644
--- a/drivers/gpu/drm/i915/display/intel_fbdev.c
+++ b/drivers/gpu/drm/i915/display/intel_fbdev.c
@@ -182,8 +182,10 @@ static int intelfb_create(struct drm_fb_helper *helper,
 
 	if (intel_fb &&
 	    (sizes->fb_width > intel_fb->base.width ||
+	     sizes->fb_height > intel_fb->base.height) ||
+	    (sizes->fb_width < intel_fb->base.width ||
 	     sizes->fb_height > intel_fb->base.height)) {
-		DRM_DEBUG_KMS("BIOS fb too small (%dx%d), we require (%dx%d),"
+		DRM_DEBUG_KMS("BIOS fb invalid size (%dx%d), we require (%dx%d),"
 			      " releasing it\n",
 			      intel_fb->base.width, intel_fb->base.height,
 			      sizes->fb_width, sizes->fb_height);
-- 
2.28.0