[PATCH 4/4] etnaviv: add support for snorm textures

[Christian Gmeiner]

Based on a patch from Wladimir J. van der Laan and untested due
to lack of hardware. Binary blob emits those formats if GPU supports
HALTI1 (faked with ibvivhook).

Signed-off-by: Christian Gmeiner <christian.gmeiner at gmail.com>
---
 src/gallium/drivers/etnaviv/etnaviv_format.c | 7 ++++---
 src/gallium/drivers/etnaviv/etnaviv_screen.c | 8 ++++++--
 2 files changed, 10 insertions(+), 5 deletions(-)

diff --git a/src/gallium/drivers/etnaviv/etnaviv_format.c b/src/gallium/drivers/etnaviv/etnaviv_format.c
index c9a8ce2..47f80ac 100644
--- a/src/gallium/drivers/etnaviv/etnaviv_format.c
+++ b/src/gallium/drivers/etnaviv/etnaviv_format.c
@@ -91,7 +91,7 @@ struct etna_format {
 static struct etna_format formats[PIPE_FORMAT_COUNT] = {
    /* 8-bit */
    V_(R8_UNORM,   UNSIGNED_BYTE, NONE),
-   V_(R8_SNORM,   BYTE,          NONE),
+   VT(R8_SNORM,   BYTE,          EXT_R8_SNORM | EXT_FORMAT, SWIZ(X, 0, 0, 1), NONE),
    V_(R8_UINT,    UNSIGNED_BYTE, NONE),
    V_(R8_SINT,    BYTE,          NONE),
    V_(R8_USCALED, UNSIGNED_BYTE, NONE),
@@ -121,7 +121,7 @@ static struct etna_format formats[PIPE_FORMAT_COUNT] = {
    _T(B5G5R5X1_UNORM, X1R5G5B5, SWIZ(X, Y, Z, W), X1R5G5B5),
 
    VT(R8G8_UNORM,   UNSIGNED_BYTE,  EXT_G8R8 | EXT_FORMAT, SWIZ(X, Y, 0, 1), NONE),
-   V_(R8G8_SNORM,   BYTE,           NONE),
+   VT(R8G8_SNORM,   BYTE,           EXT_G8R8_SNORM | EXT_FORMAT, SWIZ(X, Y, 0, 1), NONE),
    V_(R8G8_UINT,    UNSIGNED_BYTE,  NONE),
    V_(R8G8_SINT,    BYTE,           NONE),
    V_(R8G8_USCALED, UNSIGNED_BYTE,  NONE),
@@ -156,8 +156,9 @@ static struct etna_format formats[PIPE_FORMAT_COUNT] = {
    V_(A8B8G8R8_UNORM,   UNSIGNED_BYTE, NONE),
 
    V_(R8G8B8A8_UNORM,   UNSIGNED_BYTE, A8B8G8R8),
-   V_(R8G8B8A8_SNORM,   BYTE,          A8B8G8R8),
+   VT(R8G8B8A8_SNORM,   BYTE,          EXT_A8B8G8R8_SNORM | EXT_FORMAT, SWIZ(X, Y, Z, 1), NONE),
    _T(R8G8B8X8_UNORM,   X8B8G8R8,      SWIZ(X, Y, Z, W), X8B8G8R8),
+   _T(R8G8B8X8_SNORM,   EXT_X8B8G8R8_SNORM | EXT_FORMAT, SWIZ(X, Y, Z, W), NONE),
    V_(R8G8B8A8_UINT,    UNSIGNED_BYTE, A8B8G8R8),
    V_(R8G8B8A8_SINT,    BYTE,          A8B8G8R8),
    V_(R8G8B8A8_USCALED, UNSIGNED_BYTE, A8B8G8R8),
diff --git a/src/gallium/drivers/etnaviv/etnaviv_screen.c b/src/gallium/drivers/etnaviv/etnaviv_screen.c
index e310c16..c7c4c95 100644
--- a/src/gallium/drivers/etnaviv/etnaviv_screen.c
+++ b/src/gallium/drivers/etnaviv/etnaviv_screen.c
@@ -459,7 +459,8 @@ etna_screen_get_timestamp(struct pipe_screen *pscreen)
 }
 
 static bool
-gpu_supports_texure_format(struct etna_screen *screen, uint32_t fmt)
+gpu_supports_texure_format(struct etna_screen *screen, uint32_t fmt,
+                           enum pipe_format format)
 {
    if (fmt == TEXTURE_FORMAT_ETC1)
       return VIV_FEATURE(screen, chipFeatures, ETC1_TEXTURE_COMPRESSION);
@@ -470,6 +471,9 @@ gpu_supports_texure_format(struct etna_screen *screen, uint32_t fmt)
    if (fmt & EXT_FORMAT)
       return VIV_FEATURE(screen, chipMinorFeatures1, HALTI0);
 
+   if (util_format_is_snorm(format))
+      return VIV_FEATURE(screen, chipMinorFeatures2, HALTI1);
+
    return true;
 }
 
@@ -514,7 +518,7 @@ etna_screen_is_format_supported(struct pipe_screen *pscreen,
    if (usage & PIPE_BIND_SAMPLER_VIEW) {
       uint32_t fmt = translate_texture_format(format);
 
-      if (!gpu_supports_texure_format(screen, fmt))
+      if (!gpu_supports_texure_format(screen, fmt, format))
          fmt = ETNA_NO_MATCH;
 
       if (sample_count < 2 && fmt != ETNA_NO_MATCH)
-- 
2.9.4