panfrost: Identify 4-bit channel texture formats

Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>

src/gallium/drivers/panfrost/include/panfrost-job.h

@@ -294,6 +294,8 @@ struct mali_channel_swizzle {
  * bits mean.
  */
 
+#define MALI_CHANNEL_4 2
+
 #define MALI_CHANNEL_8 3
 
 #define MALI_CHANNEL_16 4
@@ -367,6 +369,7 @@ enum mali_format {
 	MALI_RGB16_UNORM  = MALI_FORMAT_UNORM | MALI_NR_CHANNELS(3) | MALI_CHANNEL_16,
 	MALI_RGB32_UNORM  = MALI_FORMAT_UNORM | MALI_NR_CHANNELS(3) | MALI_CHANNEL_32,
 	MALI_RGB32F = MALI_FORMAT_UNORM | MALI_NR_CHANNELS(3) | MALI_CHANNEL_FLOAT,
+	MALI_RGBA4_UNORM  = MALI_FORMAT_UNORM | MALI_NR_CHANNELS(4) | MALI_CHANNEL_4,
 	MALI_RGBA8_UNORM  = MALI_FORMAT_UNORM | MALI_NR_CHANNELS(4) | MALI_CHANNEL_8,
 	MALI_RGBA16_UNORM = MALI_FORMAT_UNORM | MALI_NR_CHANNELS(4) | MALI_CHANNEL_16,
 	MALI_RGBA32_UNORM = MALI_FORMAT_UNORM | MALI_NR_CHANNELS(4) | MALI_CHANNEL_32,

src/gallium/drivers/panfrost/pan_format.c

@@ -91,6 +91,8 @@ static unsigned
 panfrost_translate_channel_width(unsigned size)
 {
         switch (size) {
+                case 4:
+                        return MALI_CHANNEL_4;
                 case 8:
                         return MALI_CHANNEL_8;
                 case 16:

src/gallium/drivers/panfrost/pan_pretty_print.c

@@ -90,6 +90,7 @@ char *pandecode_format_name(enum mali_format format)
 	DEFINE_CASE(RGB16_UNORM);
 	DEFINE_CASE(RGB32_UNORM);
 	DEFINE_CASE(RGB32F);
+	DEFINE_CASE(RGBA4_UNORM);
 	DEFINE_CASE(RGBA8_UNORM);
 	DEFINE_CASE(RGBA16_UNORM);
 	DEFINE_CASE(RGBA32_UNORM);