panfrost: Move format translation to root
Since PIPE formats are now shared across Mesa we can do this, and the
routines themselves are good enough code that I'm happy to move them
here. We'll use them momentarily.
Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3858>
diff --git a/src/panfrost/encoder/pan_format.c b/src/panfrost/encoder/pan_format.c
new file mode 100644
index 0000000..8025307
--- /dev/null
+++ b/src/panfrost/encoder/pan_format.c
@@ -0,0 +1,282 @@
+/*
+ * Copyright (C) 2019 Collabora, Ltd.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ * Authors:
+ * Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
+ */
+
+#include <stdio.h>
+#include "panfrost-job.h"
+#include "pan_texture.h"
+
+static unsigned
+panfrost_translate_channel_width(unsigned size)
+{
+ switch (size) {
+ case 4:
+ return MALI_CHANNEL_4;
+ case 8:
+ return MALI_CHANNEL_8;
+ case 16:
+ return MALI_CHANNEL_16;
+ case 32:
+ return MALI_CHANNEL_32;
+ default:
+ unreachable("Invalid format width\n");
+ }
+}
+
+static unsigned
+panfrost_translate_channel_type(unsigned type, unsigned size, bool norm)
+{
+ switch (type) {
+ case UTIL_FORMAT_TYPE_UNSIGNED:
+ return norm ? MALI_FORMAT_UNORM : MALI_FORMAT_UINT;
+
+ case UTIL_FORMAT_TYPE_SIGNED:
+ return norm ? MALI_FORMAT_SNORM : MALI_FORMAT_SINT;
+
+ case UTIL_FORMAT_TYPE_FLOAT:
+ /* fp16 -- SINT, fp32 -- UNORM ... gotta use those bits */
+
+ if (size == 16)
+ return MALI_FORMAT_SINT;
+ else if (size == 32)
+ return MALI_FORMAT_UNORM;
+ else
+ unreachable("Invalid float size");
+
+ default:
+ unreachable("Invalid type");
+ }
+}
+
+/* Constructs a mali_format satisfying the specified Gallium format
+ * description */
+
+enum mali_format
+panfrost_find_format(const struct util_format_description *desc)
+{
+ /* Find first non-VOID channel */
+ struct util_format_channel_description chan = desc->channel[0];
+
+ for (unsigned c = 0; c < 4; ++c)
+ {
+ if (desc->channel[c].type == UTIL_FORMAT_TYPE_VOID)
+ continue;
+
+ chan = desc->channel[c];
+ break;
+ }
+
+ /* Check for special formats */
+ switch (desc->format)
+ {
+ case PIPE_FORMAT_NV12:
+ return MALI_NV12;
+
+ case PIPE_FORMAT_R10G10B10X2_UNORM:
+ case PIPE_FORMAT_B10G10R10X2_UNORM:
+ case PIPE_FORMAT_R10G10B10A2_UNORM:
+ case PIPE_FORMAT_B10G10R10A2_UNORM:
+ return MALI_RGB10_A2_UNORM;
+
+ case PIPE_FORMAT_R10G10B10X2_SNORM:
+ case PIPE_FORMAT_R10G10B10A2_SNORM:
+ case PIPE_FORMAT_B10G10R10A2_SNORM:
+ return MALI_RGB10_A2_SNORM;
+
+ case PIPE_FORMAT_R10G10B10A2_UINT:
+ case PIPE_FORMAT_B10G10R10A2_UINT:
+ case PIPE_FORMAT_R10G10B10A2_USCALED:
+ case PIPE_FORMAT_B10G10R10A2_USCALED:
+ return MALI_RGB10_A2UI;
+
+ case PIPE_FORMAT_R10G10B10A2_SSCALED:
+ case PIPE_FORMAT_B10G10R10A2_SSCALED:
+ return MALI_RGB10_A2I;
+
+ case PIPE_FORMAT_Z32_UNORM:
+ return MALI_Z32_UNORM;
+
+ case PIPE_FORMAT_Z24X8_UNORM:
+ case PIPE_FORMAT_Z24_UNORM_S8_UINT:
+ /* Midgard has no dedicated samplers for Z24S8 and Z24X8
+ * formats, and the GPU expects the depth to be encoded in an
+ * IEEE 32-bit float. Turn all Z24_UNORM variants into R32UI
+ * and let the shader do the conversion using bfe+fmul
+ * instructions.
+ */
+ return MALI_R32UI;
+
+ case PIPE_FORMAT_Z32_FLOAT_S8X24_UINT:
+ /* Z32F = R32F to the hardware */
+ return MALI_R32F;
+
+ case PIPE_FORMAT_B5G6R5_UNORM:
+ return MALI_RGB565;
+
+ case PIPE_FORMAT_B5G5R5A1_UNORM:
+ return MALI_RGB5_A1_UNORM;
+
+ case PIPE_FORMAT_A1B5G5R5_UNORM:
+ case PIPE_FORMAT_X1B5G5R5_UNORM:
+ /* Not supported - this is backwards from OpenGL! */
+ assert(0);
+ break;
+
+ case PIPE_FORMAT_R32_FIXED:
+ return MALI_R32_FIXED;
+ case PIPE_FORMAT_R32G32_FIXED:
+ return MALI_RG32_FIXED;
+ case PIPE_FORMAT_R32G32B32_FIXED:
+ return MALI_RGB32_FIXED;
+ case PIPE_FORMAT_R32G32B32A32_FIXED:
+ return MALI_RGBA32_FIXED;
+
+ case PIPE_FORMAT_R11G11B10_FLOAT:
+ return MALI_R11F_G11F_B10F;
+ 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;
+ }
+
+ if (desc->layout == UTIL_FORMAT_LAYOUT_ASTC) {
+ if (desc->colorspace == UTIL_FORMAT_COLORSPACE_SRGB)
+ return MALI_ASTC_SRGB_SUPP;
+ else
+ return MALI_ASTC_HDR_SUPP;
+ }
+
+ /* Formats must match in channel count */
+ assert(desc->nr_channels >= 1 && desc->nr_channels <= 4);
+ unsigned format = MALI_NR_CHANNELS(desc->nr_channels);
+
+ switch (chan.type)
+ {
+ case UTIL_FORMAT_TYPE_UNSIGNED:
+ case UTIL_FORMAT_TYPE_SIGNED:
+ case UTIL_FORMAT_TYPE_FIXED:
+ /* Channel width */
+ format |= panfrost_translate_channel_width(chan.size);
+
+ /* Channel type */
+ format |= panfrost_translate_channel_type(chan.type, chan.size, chan.normalized);
+ break;
+
+ case UTIL_FORMAT_TYPE_FLOAT:
+ /* Float formats use a special width and encode width
+ * with type mixed */
+
+ format |= MALI_CHANNEL_FLOAT;
+ format |= panfrost_translate_channel_type(chan.type, chan.size, chan.normalized);
+ break;
+
+ default:
+ printf("%s\n", util_format_name(desc->format));
+ unreachable("Invalid format type");
+ }
+
+ return (enum mali_format) format;
+}
+
+/* Is a format encoded like Z24S8 and therefore compatible for render? */
+
+bool
+panfrost_is_z24s8_variant(enum pipe_format fmt)
+{
+ switch (fmt) {
+ case PIPE_FORMAT_Z24_UNORM_S8_UINT:
+ case PIPE_FORMAT_Z24X8_UNORM:
+ return true;
+ default:
+ return false;
+ }
+}
+
+/* Translate a PIPE swizzle quad to a 12-bit Mali swizzle code. PIPE
+ * swizzles line up with Mali swizzles for the XYZW01, but PIPE swizzles have
+ * an additional "NONE" field that we have to mask out to zero. Additionally,
+ * PIPE swizzles are sparse but Mali swizzles are packed */
+
+unsigned
+panfrost_translate_swizzle_4(const unsigned char swizzle[4])
+{
+ unsigned out = 0;
+
+ for (unsigned i = 0; i < 4; ++i) {
+ unsigned translated = (swizzle[i] > PIPE_SWIZZLE_1) ? PIPE_SWIZZLE_0 : swizzle[i];
+ out |= (translated << (3*i));
+ }
+
+ return out;
+}
+
+void
+panfrost_invert_swizzle(const unsigned char *in, unsigned char *out)
+{
+ /* First, default to all zeroes to prevent uninitialized junk */
+
+ for (unsigned c = 0; c < 4; ++c)
+ out[c] = PIPE_SWIZZLE_0;
+
+ /* Now "do" what the swizzle says */
+
+ for (unsigned c = 0; c < 4; ++c) {
+ unsigned char i = in[c];
+
+ /* Who cares? */
+ assert(PIPE_SWIZZLE_X == 0);
+ if (i > PIPE_SWIZZLE_W)
+ continue;
+
+ /* Invert */
+ unsigned idx = i - PIPE_SWIZZLE_X;
+ out[idx] = PIPE_SWIZZLE_X + c;
+ }
+}