[Vk] Old Adreno driver workaround was buggy

Do not apply Adreno workarounds for the Turnip driver.

RenderSystems/Vulkan/src/OgreVulkanRenderSystem.cpp

@@ -752,7 +752,9 @@ namespace Ogre
         rsc->addShaderProfile( "glslvk" );
         rsc->addShaderProfile( "glsl" );
 
-        if( rsc->getVendor() == GPU_QUALCOMM )
+        // Turnip is the Mesa driver.
+        // These workarounds are for the proprietary driver.
+        if( rsc->getVendor() == GPU_QUALCOMM && rsc->getDeviceName().find( "Turnip" ) == String::npos )
         {
 #ifdef OGRE_VK_WORKAROUND_BAD_3D_BLIT
             Workarounds::mBad3DBlit = true;

RenderSystems/Vulkan/src/OgreVulkanTextureGpu.cpp

@@ -86,6 +86,12 @@ namespace Ogre
 
         const PixelFormatGpu finalPixelFormat = getWorkaroundedPixelFormat( mPixelFormat );
 
+        // Unfortunately this is necessary, which means the abstraction may leak to the user.
+        // The pixel format is used in PSO generation, which creates a lot of issues I'm not willing
+        // to fix just because one old driver is broken. Setting mPixelFormat here fixes all issues so
+        // far encountered with old Adreno drivers.
+        mPixelFormat = finalPixelFormat;
+
         VkImageCreateInfo imageInfo;
         makeVkStruct( imageInfo, VK_STRUCTURE_TYPE_IMAGE_CREATE_INFO );
         imageInfo.imageType = getVulkanTextureType();

RenderSystems/Vulkan/src/Vao/OgreVulkanVaoManager.cpp

@@ -122,7 +122,8 @@ namespace Ogre
 #ifdef OGRE_VK_WORKAROUND_ADRENO_UBO64K
         Workarounds::mAdrenoUbo64kLimitTriggered = false;
         Workarounds::mAdrenoUbo64kLimit = 0u;
-        if( renderSystem->getCapabilities()->getVendor() == GPU_QUALCOMM )
+        if( renderSystem->getCapabilities()->getVendor() == GPU_QUALCOMM &&
+            renderSystem->getCapabilities()->getDeviceName().find( "Turnip" ) == String::npos )
         {
             mConstBufferMaxSize =
                 std::min<size_t>( mConstBufferMaxSize, 64u * 1024u - mConstBufferAlignment );