panfrost: Add ETC1/ETC2 texture formats

Acked-by: Daniel Stone <daniels@collabora.com>
Reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3414>

src/gallium/drivers/panfrost/pan_format.c

@@ -217,6 +217,29 @@ panfrost_find_format(const struct util_format_description *desc) {
         case PIPE_FORMAT_R9G9B9E5_FLOAT:
                 return MALI_R9F_G9F_B9F_E5F;
 
+        case PIPE_FORMAT_ETC1_RGB8:
+        case PIPE_FORMAT_ETC2_RGB8:
+        case PIPE_FORMAT_ETC2_SRGB8:
+                return MALI_ETC2_RGB8;
+
+        case PIPE_FORMAT_ETC2_RGB8A1:
+        case PIPE_FORMAT_ETC2_SRGB8A1:
+                return MALI_ETC2_RGB8A1;
+
+        case PIPE_FORMAT_ETC2_RGBA8:
+        case PIPE_FORMAT_ETC2_SRGBA8:
+                return MALI_ETC2_RGBA8;
+
+        case PIPE_FORMAT_ETC2_R11_UNORM:
+                return MALI_ETC2_R11_UNORM;
+        case PIPE_FORMAT_ETC2_R11_SNORM:
+                return MALI_ETC2_R11_SNORM;
+
+        case PIPE_FORMAT_ETC2_RG11_UNORM:
+                return MALI_ETC2_RG11_UNORM;
+        case PIPE_FORMAT_ETC2_RG11_SNORM:
+                return MALI_ETC2_RG11_SNORM;
+
         default:
                 /* Fallthrough to default */
                 break;

src/gallium/drivers/panfrost/pan_resource.c

@@ -315,6 +315,9 @@ panfrost_setup_slices(struct panfrost_resource *pres, size_t *bo_size)
                 /* Compute the would-be stride */
                 unsigned stride = bytes_per_pixel * effective_width;
 
+                if (util_format_is_compressed(res->format))
+                        stride /= 4;
+
                 /* ..but cache-line align it for performance */
                 if (can_align_stride && pres->layout == PAN_LINEAR)
                         stride = ALIGN_POT(stride, 64);

src/gallium/drivers/panfrost/pan_screen.c

@@ -459,10 +459,14 @@ panfrost_is_format_supported( struct pipe_screen *screen,
         if (scanout && renderable && !util_format_is_rgba8_variant(format_desc))
                 return false;
 
-        if (format_desc->layout != UTIL_FORMAT_LAYOUT_PLAIN &&
+        switch (format_desc->layout) {
-            format_desc->layout != UTIL_FORMAT_LAYOUT_OTHER) {
+                case UTIL_FORMAT_LAYOUT_PLAIN:
-                /* Compressed formats not yet hooked up. */
+                case UTIL_FORMAT_LAYOUT_OTHER:
-                return false;
+                        break;
+                case UTIL_FORMAT_LAYOUT_ETC:
+                        return true;
+                default:
+                        return false;
         }
 
         /* Internally, formats that are depth/stencil renderable are limited.

src/panfrost/include/panfrost-job.h

@@ -229,6 +229,9 @@ struct mali_channel_swizzle {
 
 /* The top 3 bits specify how the bits of each component are interpreted. */
 
+/* e.g. ETC2_RGB8 */
+#define MALI_FORMAT_COMPRESSED (0 << 5)
+
 /* e.g. R11F_G11F_B10F */
 #define MALI_FORMAT_SPECIAL (2 << 5)
 
@@ -273,6 +276,14 @@ struct mali_channel_swizzle {
 #define MALI_CHANNEL_FLOAT 7
 
 enum mali_format {
+	MALI_ETC2_RGB8       = MALI_FORMAT_COMPRESSED | 0x1,
+	MALI_ETC2_R11_UNORM  = MALI_FORMAT_COMPRESSED | 0x2,
+	MALI_ETC2_RGBA8      = MALI_FORMAT_COMPRESSED | 0x3,
+	MALI_ETC2_RG11_UNORM = MALI_FORMAT_COMPRESSED | 0x4,
+	MALI_ETC2_R11_SNORM  = MALI_FORMAT_COMPRESSED | 0x11,
+	MALI_ETC2_RG11_SNORM = MALI_FORMAT_COMPRESSED | 0x12,
+	MALI_ETC2_RGB8A1     = MALI_FORMAT_COMPRESSED | 0x13,
+
 	MALI_RGB565         = MALI_FORMAT_SPECIAL | 0x0,
 	MALI_RGB5_A1_UNORM  = MALI_FORMAT_SPECIAL | 0x2,
 	MALI_RGB10_A2_UNORM = MALI_FORMAT_SPECIAL | 0x3,