[Mesa-dev] [PATCH 02/42] panfrost/mfbd: Include codes for float framebuffers

[Alyssa Rosenzweig]

We see the hardware doesn't actually support float framebuffers in the
native sense -- rather, it just allows higher bpp framebuffers and lets
a blend shader / additional clear_color fields sort out the formats.
This will be.. interesting.

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig at collabora.com>
---
 src/gallium/drivers/panfrost/pan_mfbd.c | 29 ++++++++++++++++++++++++-
 1 file changed, 28 insertions(+), 1 deletion(-)

diff --git a/src/gallium/drivers/panfrost/pan_mfbd.c b/src/gallium/drivers/panfrost/pan_mfbd.c
index b435d20b758..72f938713b1 100644
--- a/src/gallium/drivers/panfrost/pan_mfbd.c
+++ b/src/gallium/drivers/panfrost/pan_mfbd.c
@@ -81,14 +81,41 @@ panfrost_mfbd_format(struct pipe_surface *surf)
 
         /* Set flags for alternative formats */
 
+        bool float_16 =
+                surf->format == PIPE_FORMAT_R16_FLOAT;
+
+        bool float_32 =
+                surf->format == PIPE_FORMAT_R11G11B10_FLOAT ||
+                surf->format == PIPE_FORMAT_R32_FLOAT ||
+                surf->format == PIPE_FORMAT_R16G16_FLOAT;
+
+        bool float_64 =
+                surf->format == PIPE_FORMAT_R32G32_FLOAT ||
+                surf->format == PIPE_FORMAT_R16G16B16A16_FLOAT;
+
+        bool float_128 =
+                surf->format == PIPE_FORMAT_R32G32B32A32_FLOAT;
+
         if (surf->format == PIPE_FORMAT_B5G6R5_UNORM) {
                 fmt.unk1 = 0x14000000;
                 fmt.nr_channels = MALI_POSITIVE(2);
                 fmt.unk3 |= 0x1;
-        } else if (surf->format == PIPE_FORMAT_R11G11B10_FLOAT) {
+        } else if (float_32) {
                 fmt.unk1 = 0x88000000;
                 fmt.unk3 = 0x0;
                 fmt.nr_channels = MALI_POSITIVE(4);
+        } else if (float_16) {
+                fmt.unk1 = 0x84000000;
+                fmt.unk3 = 0x0;
+                fmt.nr_channels = MALI_POSITIVE(2);
+        } else if (float_64) {
+                fmt.unk1 = 0x8c000000;
+                fmt.unk3 = 0x1;
+                fmt.nr_channels = MALI_POSITIVE(2);
+        } else if (float_128) {
+                fmt.unk1 = 0x90000000;
+                fmt.unk3 = 0x1;
+                fmt.nr_channels = MALI_POSITIVE(4);
         }
 
         return fmt;
-- 
2.20.1