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

[Lucas Stach]

Am Mittwoch, den 21.06.2017, 22:36 +0200 schrieb 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).

This patch causes piglit regressions on i.MX6QP. For example the
fbo-blend-color test is going from some broken subtests to a complete
failure. I'm not sure if it's a failure on the on the test or Mesa side,
the etnaviv pipe driver seems to handle things correctly.

Given how close we are to the 17.2 branchpoint we need either a
volunteer to look into this (I don't have the time currently) or we
should revert this patch and try again after 17.2.

Regards,
Lucas
> 
> 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)