4 files changed, 105 insertions, 17 deletions

diff --git a/drivers/gpu/drm/radeon/atombios_crtc.c b/drivers/gpu/drm/radeon/atombios_crtc.c
index 26c12a3fe430..9758f9170fce 100644
--- a/drivers/gpu/drm/radeon/atombios_crtc.c
+++ b/drivers/gpu/drm/radeon/atombios_crtc.c
@@ -1136,6 +1136,7 @@ static int dce4_crtc_do_set_base(struct drm_crtc *crtc,
         u32 fb_swap = EVERGREEN_GRPH_ENDIAN_SWAP(EVERGREEN_GRPH_ENDIAN_NONE);
         u32 tmp, viewport_w, viewport_h;
         int r;
+        bool bypass_lut = false;
 
         /* no fb bound */
         if (!atomic && !crtc->primary->fb) {
@@ -1174,33 +1175,73 @@ static int dce4_crtc_do_set_base(struct drm_crtc *crtc,
         radeon_bo_get_tiling_flags(rbo, &tiling_flags, NULL);
         radeon_bo_unreserve(rbo);
 
-        switch (target_fb->bits_per_pixel) {
-        case 8:
+        switch (target_fb->pixel_format) {
+        case DRM_FORMAT_C8:
                 fb_format = (EVERGREEN_GRPH_DEPTH(EVERGREEN_GRPH_DEPTH_8BPP) |
                              EVERGREEN_GRPH_FORMAT(EVERGREEN_GRPH_FORMAT_INDEXED));
                 break;
-        case 15:
+        case DRM_FORMAT_XRGB4444:
+        case DRM_FORMAT_ARGB4444:
+                fb_format = (EVERGREEN_GRPH_DEPTH(EVERGREEN_GRPH_DEPTH_16BPP) |
+                             EVERGREEN_GRPH_FORMAT(EVERGREEN_GRPH_FORMAT_ARGB4444));
+#ifdef __BIG_ENDIAN
+                fb_swap = EVERGREEN_GRPH_ENDIAN_SWAP(EVERGREEN_GRPH_ENDIAN_8IN16);
+#endif
+                break;
+        case DRM_FORMAT_XRGB1555:
+        case DRM_FORMAT_ARGB1555:
                 fb_format = (EVERGREEN_GRPH_DEPTH(EVERGREEN_GRPH_DEPTH_16BPP) |
                              EVERGREEN_GRPH_FORMAT(EVERGREEN_GRPH_FORMAT_ARGB1555));
+#ifdef __BIG_ENDIAN
+                fb_swap = EVERGREEN_GRPH_ENDIAN_SWAP(EVERGREEN_GRPH_ENDIAN_8IN16);
+#endif
+                break;
+        case DRM_FORMAT_BGRX5551:
+        case DRM_FORMAT_BGRA5551:
+                fb_format = (EVERGREEN_GRPH_DEPTH(EVERGREEN_GRPH_DEPTH_16BPP) |
+                             EVERGREEN_GRPH_FORMAT(EVERGREEN_GRPH_FORMAT_BGRA5551));
+#ifdef __BIG_ENDIAN
+                fb_swap = EVERGREEN_GRPH_ENDIAN_SWAP(EVERGREEN_GRPH_ENDIAN_8IN16);
+#endif
                 break;
-        case 16:
+        case DRM_FORMAT_RGB565:
                 fb_format = (EVERGREEN_GRPH_DEPTH(EVERGREEN_GRPH_DEPTH_16BPP) |
                              EVERGREEN_GRPH_FORMAT(EVERGREEN_GRPH_FORMAT_ARGB565));
 #ifdef __BIG_ENDIAN
                 fb_swap = EVERGREEN_GRPH_ENDIAN_SWAP(EVERGREEN_GRPH_ENDIAN_8IN16);
 #endif
                 break;
-        case 24:
-        case 32:
+        case DRM_FORMAT_XRGB8888:
+        case DRM_FORMAT_ARGB8888:
                 fb_format = (EVERGREEN_GRPH_DEPTH(EVERGREEN_GRPH_DEPTH_32BPP) |
                              EVERGREEN_GRPH_FORMAT(EVERGREEN_GRPH_FORMAT_ARGB8888));
 #ifdef __BIG_ENDIAN
                 fb_swap = EVERGREEN_GRPH_ENDIAN_SWAP(EVERGREEN_GRPH_ENDIAN_8IN32);
 #endif
                 break;
+        case DRM_FORMAT_XRGB2101010:
+        case DRM_FORMAT_ARGB2101010:
+                fb_format = (EVERGREEN_GRPH_DEPTH(EVERGREEN_GRPH_DEPTH_32BPP) |
+                             EVERGREEN_GRPH_FORMAT(EVERGREEN_GRPH_FORMAT_ARGB2101010));
+#ifdef __BIG_ENDIAN
+                fb_swap = EVERGREEN_GRPH_ENDIAN_SWAP(EVERGREEN_GRPH_ENDIAN_8IN32);
+#endif
+                /* Greater 8 bpc fb needs to bypass hw-lut to retain precision */
+                bypass_lut = true;
+                break;
+        case DRM_FORMAT_BGRX1010102:
+        case DRM_FORMAT_BGRA1010102:
+                fb_format = (EVERGREEN_GRPH_DEPTH(EVERGREEN_GRPH_DEPTH_32BPP) |
+                             EVERGREEN_GRPH_FORMAT(EVERGREEN_GRPH_FORMAT_BGRA1010102));
+#ifdef __BIG_ENDIAN
+                fb_swap = EVERGREEN_GRPH_ENDIAN_SWAP(EVERGREEN_GRPH_ENDIAN_8IN32);
+#endif
+                /* Greater 8 bpc fb needs to bypass hw-lut to retain precision */
+                bypass_lut = true;
+                break;
         default:
-                DRM_ERROR("Unsupported screen depth %d\n",
-                          target_fb->bits_per_pixel);
+                DRM_ERROR("Unsupported screen format %s\n",
+                          drm_get_format_name(target_fb->pixel_format));
                 return -EINVAL;
         }
 
@@ -1329,6 +1370,18 @@ static int dce4_crtc_do_set_base(struct drm_crtc *crtc,
         WREG32(EVERGREEN_GRPH_CONTROL + radeon_crtc->crtc_offset, fb_format);
         WREG32(EVERGREEN_GRPH_SWAP_CONTROL + radeon_crtc->crtc_offset, fb_swap);
 
+        /*
+         * The LUT only has 256 slots for indexing by a 8 bpc fb. Bypass the LUT
+         * for > 8 bpc scanout to avoid truncation of fb indices to 8 msb's, to
+         * retain the full precision throughout the pipeline.
+         */
+        WREG32_P(EVERGREEN_GRPH_LUT_10BIT_BYPASS_CONTROL + radeon_crtc->crtc_offset,
+                 (bypass_lut ? EVERGREEN_LUT_10BIT_BYPASS_EN : 0),
+                 ~EVERGREEN_LUT_10BIT_BYPASS_EN);
+
+        if (bypass_lut)
+                DRM_DEBUG_KMS("Bypassing hardware LUT due to 10 bit fb scanout.\n");
+
         WREG32(EVERGREEN_GRPH_SURFACE_OFFSET_X + radeon_crtc->crtc_offset, 0);
         WREG32(EVERGREEN_GRPH_SURFACE_OFFSET_Y + radeon_crtc->crtc_offset, 0);
         WREG32(EVERGREEN_GRPH_X_START + radeon_crtc->crtc_offset, 0);
@@ -1396,6 +1449,7 @@ static int avivo_crtc_do_set_base(struct drm_crtc *crtc,
         u32 fb_swap = R600_D1GRPH_SWAP_ENDIAN_NONE;
         u32 tmp, viewport_w, viewport_h;
         int r;
+        bool bypass_lut = false;
 
         /* no fb bound */
         if (!atomic && !crtc->primary->fb) {
@@ -1433,18 +1487,30 @@ static int avivo_crtc_do_set_base(struct drm_crtc *crtc,
         radeon_bo_get_tiling_flags(rbo, &tiling_flags, NULL);
         radeon_bo_unreserve(rbo);
 
-        switch (target_fb->bits_per_pixel) {
-        case 8:
+        switch (target_fb->pixel_format) {
+        case DRM_FORMAT_C8:
                 fb_format =
                     AVIVO_D1GRPH_CONTROL_DEPTH_8BPP |
                     AVIVO_D1GRPH_CONTROL_8BPP_INDEXED;
                 break;
-        case 15:
+        case DRM_FORMAT_XRGB4444:
+        case DRM_FORMAT_ARGB4444:
+                fb_format =
+                    AVIVO_D1GRPH_CONTROL_DEPTH_16BPP |
+                    AVIVO_D1GRPH_CONTROL_16BPP_ARGB4444;
+#ifdef __BIG_ENDIAN
+                fb_swap = R600_D1GRPH_SWAP_ENDIAN_16BIT;
+#endif
+                break;
+        case DRM_FORMAT_XRGB1555:
                 fb_format =
                     AVIVO_D1GRPH_CONTROL_DEPTH_16BPP |
                     AVIVO_D1GRPH_CONTROL_16BPP_ARGB1555;
+#ifdef __BIG_ENDIAN
+                fb_swap = R600_D1GRPH_SWAP_ENDIAN_16BIT;
+#endif
                 break;
-        case 16:
+        case DRM_FORMAT_RGB565:
                 fb_format =
                     AVIVO_D1GRPH_CONTROL_DEPTH_16BPP |