[PATCH 06/26] hw/display/apple-gfx: Removes dead/superfluous code

[Phil Dennis-Jordan]

This removes a few chunks of code that do nothing useful.

 * MAX_MRS was not used anywhere.
 * The MMIO offset switch block had only a default case.
 * Generating mip maps for the texture is a waste of time as the
   texture is only used for read-out to a system memory buffer.
 * The trace range callbacks are used only when the device is
   handled by the (2D-only) UEFI guest driver, not by the macOS
   guest driver, hence the lack of observed use in the vmapple
   machine which does not use UEFI. Making these no-ops could
   potentially be harmful, whereas leaving them unimplemented
   is explicitly supported according to the framework header
   docs.

Signed-off-by: Phil Dennis-Jordan <phil@philjordan.eu>
---
 hw/display/apple-gfx.m | 17 +----------------
 1 file changed, 1 insertion(+), 16 deletions(-)

diff --git a/hw/display/apple-gfx.m b/hw/display/apple-gfx.m
index 8b0459f969..b10c060d9a 100644
--- a/hw/display/apple-gfx.m
+++ b/hw/display/apple-gfx.m
@@ -28,8 +28,6 @@
 
 #define TYPE_APPLE_GFX          "apple-gfx"
 
-#define MAX_MRS 512
-
 static const PGDisplayCoord_t apple_gfx_modes[] = {
     { .x = 1440, .y = 1080 },
     { .x = 1280, .y = 1024 },
@@ -149,11 +147,7 @@ static uint64_t apple_gfx_read(void *opaque, hwaddr 
offset, unsigned size)
     AppleGFXState *s = opaque;
     uint64_t res = 0;
 
-    switch (offset) {
-    default:
-        res = [s->pgdev mmioReadAtOffset:offset];
-        break;
-    }
+    res = [s->pgdev mmioReadAtOffset:offset];
 
     trace_apple_gfx_read(offset, res);
 
@@ -248,7 +242,6 @@ static void apple_gfx_fb_update_display(void *opaque)
     }
 
     id<MTLBlitCommandEncoder> blitCommandEncoder = [mipmapCommandBuffer 
blitCommandEncoder];
-    [blitCommandEncoder generateMipmapsForTexture:s->texture];
     [blitCommandEncoder endEncoding];
     [mipmapCommandBuffer commit];
     [mipmapCommandBuffer waitUntilCompleted];
@@ -460,14 +453,6 @@ static void apple_gfx_realize(DeviceState *dev, Error 
**errp)
         }
     };
 
-    desc.addTraceRange = ^(PGPhysicalMemoryRange_t * _Nonnull range, 
PGTraceRangeHandler _Nonnull handler) {
-        /* Never saw this called. Return a bogus pointer so we catch access. */
-        return (PGTraceRange_t *)(void *)(uintptr_t)0x4242;
-    };
-
-    desc.removeTraceRange = ^(PGTraceRange_t * _Nonnull range) {
-        /* Never saw this called. Nothing to do. */
-    };
     s->pgdev = PGNewDeviceWithDescriptor(desc);
 
     [disp_desc init];
-- 
2.39.3 (Apple Git-146)