isl/formats: R8G8B8_UNORM_SRGB isn't supported on HSW

On Haswell, the format works but it doesn't properly do an sRGB decode.
It appears to act identically to R8G8B8_UNORM.  Only Vulkan uses this
format so this only affects Vulkan on HSW.

Cc: mesa-stable@lists.freedesktop.org
Reviewed-by: Eric Engestrom <eric@engestrom.ch>

diff --git a/src/intel/isl/isl_format.c b/src/intel/isl/isl_format.c
index b429e77..9847f23 100644 (file)
--- a/src/intel/isl/isl_format.c
+++ b/src/intel/isl/isl_format.c
@@ -294,7 +294,11 @@ static const struct surface_format_info format_info[] = {
    SF( 70,  70,   x,   x,   x,   x,   x,   x,   x,   x,   x,   x,   BC7_UNORM_SRGB)
    SF( 70,  70,   x,   x,   x,   x,   x,   x,   x,   x,   x,   x,   BC6H_UF16)
    SF(  x,   x,   x,   x,   x,   x,   x,   x,   x,   x,   x,   x,   PLANAR_420_8)
-   SF( 75,  75,   x,   x,   x,   x,   x,   x,   x,   x,   x,   x,   R8G8B8_UNORM_SRGB)
+   /* The format enum for R8G8B8_UNORM_SRGB first shows up in the HSW PRM but
+    * empirical testing indicates that it doesn't actually sRGB decode and
+    * acts identical to R8G8B8_UNORM.  It does work on gen8+.
+    */
+   SF( 80,  80,   x,   x,   x,   x,   x,   x,   x,   x,   x,   x,   R8G8B8_UNORM_SRGB)
    SF( 80,  80,   x,   x,   x,   x,   x,   x,   x,   x,   x,   x,   ETC1_RGB8)
    SF( 80,  80,   x,   x,   x,   x,   x,   x,   x,   x,   x,   x,   ETC2_RGB8)
    SF( 80,  80,   x,   x,   x,   x,   x,   x,   x,   x,   x,   x,   EAC_R11)