freedreno+turnip: Add has_8bpp_ubwc

Newer a6xx devices seem to drop 8b/pixel UBWC support.

The turnip part was adapted from Jonathans patch on !10892

Signed-off-by: Rob Clark <robdclark@chromium.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/11790>

src/freedreno/common/freedreno_dev_info.h

@@ -94,6 +94,8 @@ struct fd_dev_info {
           */
          bool has_cp_reg_write;
 
+         bool has_8bpp_ubwc;
+
          struct {
             uint32_t RB_UNKNOWN_8E04_blit;
             uint32_t PC_UNKNOWN_9805;

src/freedreno/common/freedreno_devices.py

@@ -115,6 +115,7 @@ class A6xxGPUInfo(GPUInfo):
         # Things that earlier gens have and later gens remove, provide
         # defaults here and let them be overridden by sub-gen template:
         self.a6xx.has_cp_reg_write = True
+        self.a6xx.has_8bpp_ubwc = True
 
         for name, val in template.items():
             setattr(self.a6xx, name, val)

src/freedreno/vulkan/tu_formats.c

@@ -508,7 +508,7 @@ tu_GetPhysicalDeviceFormatProperties2(
 
       /* note: ubwc_possible() argument values to be ignored except for format */
       if (pFormatProperties->formatProperties.optimalTilingFeatures &&
-          ubwc_possible(format, VK_IMAGE_TYPE_2D, 0, 0, false, VK_SAMPLE_COUNT_1_BIT)) {
+          ubwc_possible(format, VK_IMAGE_TYPE_2D, 0, 0, physical_device->info, VK_SAMPLE_COUNT_1_BIT)) {
          vk_outarray_append(&out, mod_props) {
             mod_props->drmFormatModifier = DRM_FORMAT_MOD_QCOM_COMPRESSED;
             mod_props->drmFormatModifierPlaneCount = 1;
@@ -556,7 +556,7 @@ tu_get_image_format_properties(
             return VK_ERROR_FORMAT_NOT_SUPPORTED;
 
 
-         if (!ubwc_possible(info->format, info->type, info->usage, info->usage, physical_device->info->a6xx.has_z24uint_s8uint, sampleCounts))
+         if (!ubwc_possible(info->format, info->type, info->usage, info->usage, physical_device->info, sampleCounts))
             return VK_ERROR_FORMAT_NOT_SUPPORTED;
 
          format_feature_flags = format_props.optimalTilingFeatures;

src/freedreno/vulkan/tu_image.c

@@ -449,7 +449,7 @@ tu_image_view_init(struct tu_image_view *iview,
 
 bool
 ubwc_possible(VkFormat format, VkImageType type, VkImageUsageFlags usage,
-              VkImageUsageFlags stencil_usage, bool has_z24uint_s8uint,
+              VkImageUsageFlags stencil_usage, const struct fd_dev_info *info,
               VkSampleCountFlagBits samples)
 {
    /* no UBWC with compressed formats, E5B9G9R9, S8_UINT
@@ -460,6 +460,14 @@ ubwc_possible(VkFormat format, VkImageType type, VkImageUsageFlags usage,
        format == VK_FORMAT_S8_UINT)
       return false;
 
+   if (!info->a6xx.has_8bpp_ubwc &&
+       (format == VK_FORMAT_R8_UNORM ||
+        format == VK_FORMAT_R8_SNORM ||
+        format == VK_FORMAT_R8_UINT ||
+        format == VK_FORMAT_R8_SINT ||
+        format == VK_FORMAT_R8_SRGB))
+      return false;
+
    if (type == VK_IMAGE_TYPE_3D) {
       tu_finishme("UBWC with 3D textures");
       return false;
@@ -488,12 +496,12 @@ ubwc_possible(VkFormat format, VkImageType type, VkImageUsageFlags usage,
     * Additionally, the special AS_R8G8B8A8 format is broken without UBWC,
     * so we have to fallback to 8_8_8_8_UNORM when UBWC is disabled
     */
-   if (!has_z24uint_s8uint &&
+   if (!info->a6xx.has_z24uint_s8uint &&
        format == VK_FORMAT_D24_UNORM_S8_UINT &&
        (stencil_usage & (VK_IMAGE_USAGE_SAMPLED_BIT | VK_IMAGE_USAGE_INPUT_ATTACHMENT_BIT)))
       return false;
 
-   if (!has_z24uint_s8uint && samples > VK_SAMPLE_COUNT_1_BIT)
+   if (!info->a6xx.has_z24uint_s8uint && samples > VK_SAMPLE_COUNT_1_BIT)
       return false;
 
    return true;
@@ -609,7 +617,7 @@ tu_CreateImage(VkDevice _device,
 
    if (!ubwc_possible(image->vk_format, pCreateInfo->imageType, pCreateInfo->usage,
                       stencil_usage_info ? stencil_usage_info->stencilUsage : pCreateInfo->usage,
-                      device->physical_device->info->a6xx.has_z24uint_s8uint, pCreateInfo->samples))
+                      device->physical_device->info, pCreateInfo->samples))
       ubwc_enabled = false;
 
    /* expect UBWC enabled if we asked for it */

src/freedreno/vulkan/tu_private.h

@@ -1468,8 +1468,8 @@ tu_image_view_init(struct tu_image_view *iview,
                    bool limited_z24s8);
 
 bool
-ubwc_possible(VkFormat format, VkImageType type, VkImageUsageFlags usage, VkImageUsageFlags stencil_usage, bool limited_z24s8,
-              VkSampleCountFlagBits samples);
+ubwc_possible(VkFormat format, VkImageType type, VkImageUsageFlags usage, VkImageUsageFlags stencil_usage,
+              const struct fd_dev_info *info, VkSampleCountFlagBits samples);
 
 struct tu_buffer_view
 {

src/gallium/drivers/freedreno/a6xx/fd6_resource.c

@@ -39,6 +39,8 @@
 static bool
 ok_ubwc_format(struct pipe_screen *pscreen, enum pipe_format pfmt)
 {
+   const struct fd_dev_info *info = fd_screen(pscreen)->info;
+
    switch (pfmt) {
    case PIPE_FORMAT_X24S8_UINT:
    case PIPE_FORMAT_Z24_UNORM_S8_UINT:
@@ -47,7 +49,7 @@ ok_ubwc_format(struct pipe_screen *pscreen, enum pipe_format pfmt)
        * fd_resource_uncompress() at the point of stencil sampling because
        * that itself uses stencil sampling in the fd_blitter_blit path.
        */
-      return fd_screen(pscreen)->info->a6xx.has_z24uint_s8uint;
+      return info->a6xx.has_z24uint_s8uint;
 
    case PIPE_FORMAT_R8_G8B8_420_UNORM:
       return true;
@@ -81,10 +83,11 @@ ok_ubwc_format(struct pipe_screen *pscreen, enum pipe_format pfmt)
    case FMT6_8_8_SINT:
    case FMT6_8_8_UINT:
    case FMT6_8_8_UNORM:
-   case FMT6_8_UNORM:
    case FMT6_Z24_UNORM_S8_UINT:
    case FMT6_Z24_UNORM_S8_UINT_AS_R8G8B8A8:
       return true;
+   case FMT6_8_UNORM:
+      return info->a6xx.has_8bpp_ubwc;
    default:
       return false;
    }