Hello,

Maybe you can also review (with Reviewed-by tag) and rebase on this patch 
I've sent before. I don't know about any problem this fixes but what we 
have now is not entirely correct.

Regards,
BALATON Zoltan

---------- Forwarded message ----------
Date: Tue, 07 Oct 2025 21:54:35 +0200 (CEST)
From: BALATON Zoltan <balaton@eik.bme.hu>
To: qemu-devel@nongnu.org
Cc: Gerd Hoffmann <kraxel@redhat.com>, marcandre.lureau@redhat.com
Subject: [PATCH] ati-vga: Separate default control bit for source

The DP_GUI_MASTER_CNTL register has separate bits for src and dest but
we were only looking at the dest bit. Use the correct bit for source.

Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
---
  hw/display/ati_2d.c | 11 ++++++-----
  1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/hw/display/ati_2d.c b/hw/display/ati_2d.c
index 309bb5ccb6..e69b15b570 100644
--- a/hw/display/ati_2d.c
+++ b/hw/display/ati_2d.c
@@ -43,7 +43,8 @@ static int ati_bpp_from_datatype(ATIVGAState *s)
      }
  }

-#define DEFAULT_CNTL (s->regs.dp_gui_master_cntl & GMC_DST_PITCH_OFFSET_CNTL)
+#define DFLT_CNTL_SRC (s->regs.dp_gui_master_cntl & GMC_SRC_PITCH_OFFSET_CNTL)
+#define DFLT_CNTL_DST (s->regs.dp_gui_master_cntl & GMC_DST_PITCH_OFFSET_CNTL)

  void ati_2d_blt(ATIVGAState *s)
  {
@@ -63,12 +64,12 @@ void ati_2d_blt(ATIVGAState *s)
          qemu_log_mask(LOG_GUEST_ERROR, "Invalid bpp\n");
          return;
      }
-    int dst_stride = DEFAULT_CNTL ? s->regs.dst_pitch : s->regs.default_pitch;
+    int dst_stride = DFLT_CNTL_DST ? s->regs.dst_pitch : s->regs.default_pitch;
      if (!dst_stride) {
          qemu_log_mask(LOG_GUEST_ERROR, "Zero dest pitch\n");
          return;
      }
-    uint8_t *dst_bits = s->vga.vram_ptr + (DEFAULT_CNTL ?
+    uint8_t *dst_bits = s->vga.vram_ptr + (DFLT_CNTL_DST ?
                          s->regs.dst_offset : s->regs.default_offset);

      if (s->dev_id == PCI_DEVICE_ID_ATI_RAGE128_PF) {
@@ -97,13 +98,13 @@ void ati_2d_blt(ATIVGAState *s)
                         s->regs.src_x : s->regs.src_x + 1 - s->regs.dst_width);
          unsigned src_y = (s->regs.dp_cntl & DST_Y_TOP_TO_BOTTOM ?
                         s->regs.src_y : s->regs.src_y + 1 - s->regs.dst_height);
-        int src_stride = DEFAULT_CNTL ?
+        int src_stride = DFLT_CNTL_SRC ?
                           s->regs.src_pitch : s->regs.default_pitch;
          if (!src_stride) {
              qemu_log_mask(LOG_GUEST_ERROR, "Zero source pitch\n");
              return;
          }
-        uint8_t *src_bits = s->vga.vram_ptr + (DEFAULT_CNTL ?
+        uint8_t *src_bits = s->vga.vram_ptr + (DFLT_CNTL_SRC ?
                              s->regs.src_offset : s->regs.default_offset);

          if (s->dev_id == PCI_DEVICE_ID_ATI_RAGE128_PF) {
-- 
2.41.3