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charset="UTF-8"; format=flowed Content-Transfer-Encoding: 8bit ++ Arun Hi Ville, On 3/16/2026 10:57 PM, B, Jeevan wrote: >> -----Original Message----- >> From: Ville Syrjälä >> Sent: Monday, March 16, 2026 8:15 PM >> To: B, Jeevan >> Cc:igt-dev@lists.freedesktop.org; Naladala, Ramanaidu >> >> Subject: Re: [PATCH i-g-t] tests/kms_cursor_legacy: Prefer tile4 modifier when >> supported >> >> On Mon, Mar 16, 2026 at 09:08:07AM +0530, Jeevan B wrote: >>> While creating the framebuffer, prefer tile4 when it is supported >>> instead of always using linear. Fall back to linear if tile4 is not >>> available. >> Why? > On Xe platforms, using the linear modifier takes longer to prepare and submit a flip compared to tiled modifiers. > On HRR panels, the available frame time is small, and this delay can cause flips to be submitted in the Evasion region, > leading to sequence mismatches. Adding some points: XE does not include memory optimizations for linear surfaces, which leads to higher processing time for linear buffers. Consequently, linear stress tests are intermittently failing. >>> Signed-off-by: Jeevan B >>> --- >>> tests/kms_cursor_legacy.c | 10 ++++++++-- >>> 1 file changed, 8 insertions(+), 2 deletions(-) >>> >>> diff --git a/tests/kms_cursor_legacy.c b/tests/kms_cursor_legacy.c >>> index 5399ef481..4c4e477a1 100644 >>> --- a/tests/kms_cursor_legacy.c >>> +++ b/tests/kms_cursor_legacy.c >>> @@ -367,15 +367,21 @@ static void set_fb_on_crtc(igt_display_t >>> *display, igt_crtc_t *crtc, { >>> drmModeModeInfoPtr mode; >>> igt_plane_t *primary; >>> + uint64_t modifier = DRM_FORMAT_MOD_LINEAR; >>> >>> igt_output_set_crtc(output, crtc); >>> mode = igt_output_get_mode(output); >>> >>> + primary = igt_output_get_plane_type(output, >> DRM_PLANE_TYPE_PRIMARY); >>> + >>> + if (igt_plane_has_format_mod(primary, DRM_FORMAT_XRGB8888, >>> + I915_FORMAT_MOD_4_TILED)) >>> + modifier = I915_FORMAT_MOD_4_TILED; >>> + >>> igt_create_pattern_fb(display->drm_fd, >>> mode->hdisplay, mode->vdisplay, >>> - DRM_FORMAT_XRGB8888, DRM_FORMAT_MOD_LINEAR, >> fb_info); >>> + DRM_FORMAT_XRGB8888, modifier, fb_info); >>> >>> - primary = igt_output_get_plane_type(output, >> DRM_PLANE_TYPE_PRIMARY); >>> igt_plane_set_fb(primary, fb_info); >>> } >>> >>> -- >>> 2.43.0 >> -- >> Ville Syrjälä >> Intel --------------b7KTD0oCI2wl4tVuduwmUxfe Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: 8bit

++ Arun

Hi Ville,

On 3/16/2026 10:57 PM, B, Jeevan wrote:
-----Original Message-----
From: Ville Syrjälä <ville.syrjala@linux.intel.com>
Sent: Monday, March 16, 2026 8:15 PM
To: B, Jeevan <jeevan.b@intel.com>
Cc: igt-dev@lists.freedesktop.org; Naladala, Ramanaidu
<ramanaidu.naladala@intel.com>
Subject: Re: [PATCH i-g-t] tests/kms_cursor_legacy: Prefer tile4 modifier when
supported

On Mon, Mar 16, 2026 at 09:08:07AM +0530, Jeevan B wrote:

While creating the framebuffer, prefer tile4 when it is supported
instead of always using linear. Fall back to linear if tile4 is not
available.

Why?

On Xe platforms, using the linear modifier takes longer to prepare and submit a flip compared to tiled modifiers. 
On HRR panels, the available frame time is small, and this delay can cause flips to be submitted in the Evasion region, 
leading to sequence mismatches.


Adding some points:

XE does not include memory optimizations for linear surfaces, which leads to higher processing time for linear buffers. Consequently, linear stress tests are intermittently failing.


      

        

        

          
Signed-off-by: Jeevan B <jeevan.b@intel.com>
---
 tests/kms_cursor_legacy.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/tests/kms_cursor_legacy.c b/tests/kms_cursor_legacy.c
index 5399ef481..4c4e477a1 100644
--- a/tests/kms_cursor_legacy.c
+++ b/tests/kms_cursor_legacy.c
@@ -367,15 +367,21 @@ static void set_fb_on_crtc(igt_display_t
*display, igt_crtc_t *crtc,  {
 	drmModeModeInfoPtr mode;
 	igt_plane_t *primary;
+	uint64_t modifier = DRM_FORMAT_MOD_LINEAR;

 	igt_output_set_crtc(output, crtc);
 	mode = igt_output_get_mode(output);

+	primary = igt_output_get_plane_type(output,


        

        
DRM_PLANE_TYPE_PRIMARY);


        

          
+
+	if (igt_plane_has_format_mod(primary, DRM_FORMAT_XRGB8888,
+				     I915_FORMAT_MOD_4_TILED))
+		modifier = I915_FORMAT_MOD_4_TILED;
+
 	igt_create_pattern_fb(display->drm_fd,
 		      mode->hdisplay, mode->vdisplay,
-		      DRM_FORMAT_XRGB8888, DRM_FORMAT_MOD_LINEAR,


        

        
fb_info);


        

          
+		      DRM_FORMAT_XRGB8888, modifier, fb_info);

-	primary = igt_output_get_plane_type(output,


        

        
DRM_PLANE_TYPE_PRIMARY);


        

          
 	igt_plane_set_fb(primary, fb_info);
 }

--
2.43.0


        

        
--
Ville Syrjälä
Intel


      

    

  


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