From e3ff5d6cdbd360cde9de3c5c06e5213cffb9dbeb Mon Sep 17 00:00:00 2001
From: Jose Maria Casanova Crespo <jmcasanova@igalia.com>
Date: Mon, 11 May 2026 21:47:37 +0200
Subject: [PATCH] v3dv: expose maxFragmentOutputAttachments as max_rts
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V3DV hardcoded maxFragmentOutputAttachments to 4, from
V3D 4.x when V3D_MAX_RENDER_TARGETS was 4. On V3D 7.x (RPi5)
V3D_MAX_RENDER_TARGETS is 8.

WebGPU's mandatory maxColorAttachments minimum is 8, and wgpu computes
max_color_attachments as min(maxColorAttachments,
maxFragmentOutputAttachments). With the previous value V3DV capped
WebGPU clients to 4 color attachments on RPi5.

Reviewed-by: Alejandro Piñeiro <apinheiro@igalia.com>
Reviewed-by: Iago Toral Quiroga <itoral@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/41600>
---
 src/broadcom/vulkan/v3dv_device.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/broadcom/vulkan/v3dv_device.c b/src/broadcom/vulkan/v3dv_device.c
index 416627d76ec..ac5a8b9d870 100644
--- a/src/broadcom/vulkan/v3dv_device.c
+++ b/src/broadcom/vulkan/v3dv_device.c
@@ -1014,7 +1014,7 @@ get_device_properties(const struct v3dv_physical_device *device,
 
       /* Fragment limits */
       .maxFragmentInputComponents               = max_varying_components,
-      .maxFragmentOutputAttachments             = 4,
+      .maxFragmentOutputAttachments             = max_rts,
       .maxFragmentDualSrcAttachments            = 1,
       .maxFragmentCombinedOutputResources       = max_rts +
                                                   MAX_STORAGE_BUFFERS +