[Intel-gfx] [PATCH - v2] drm/i915: Discard large BIOS framebuffers causing display corruption.

[Ashish Arora]

Hi Jani

Please review the patch and tell is something else is required.


________________________________
From: Ashish Arora <ashisharora.linux at outlook.com>
Sent: Friday, 7 January, 2022, 8:32 pm
To: jani.nikula at linux.intel.com; joonas.lahtinen at linux.intel.com; rodrigo.vivi at intel.com
Cc: intel-gfx at lists.freedesktop.org; Linux Kernel Mailing List
Subject: [PATCH - v2] drm/i915: Discard large BIOS framebuffers causing display corruption.

From: Ashish Arora <ashisharora.linux at outlook.com>

On certain 4k panels, the BIOS framebuffer is larger than what panel
requires causing display corruption. Introduce a check for the same.

Signed-off-by: Ashish Arora <ashisharora.linux at outlook.com>
---
 drivers/gpu/drm/i915/display/intel_fbdev.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_fbdev.c b/drivers/gpu/drm/i915/display/intel_fbdev.c
index adc3a81be..0a64184df 100644
--- a/drivers/gpu/drm/i915/display/intel_fbdev.c
+++ b/drivers/gpu/drm/i915/display/intel_fbdev.c
@@ -194,10 +194,10 @@ static int intelfb_create(struct drm_fb_helper *helper,
         int ret;

         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_dbg_kms(&dev_priv->drm,
-                           "BIOS fb too small (%dx%d), we require (%dx%d),"
+                           "BIOS fb not valid (%dx%d), we require (%dx%d),"
                             " releasing it\n",
                             intel_fb->base.width, intel_fb->base.height,
                             sizes->fb_width, sizes->fb_height);
--
2.25.1



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