drm/i915: ValleyView watermark support

Add support for ValleyView watermark handling.

v2: remove unused reg & bit definitions (Ben)

Acked-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index a8d218c..7ce595f 100644 (file)
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -1043,6 +1043,9 @@
 #define RAMCLK_GATE_D          0x6210          /* CRL only */
 #define DEUC                   0x6214          /* CRL only */
 
+#define FW_BLC_SELF_VLV                0x6500
+#define  FW_CSPWRDWNEN         (1<<15)
+
 /*
  * Palette regs
  */
@@ -2495,6 +2498,7 @@
 #define I915_FIFO_LINE_SIZE    64
 #define I830_FIFO_LINE_SIZE    32
 
+#define VALLEYVIEW_FIFO_SIZE   255
 #define G4X_FIFO_SIZE          127
 #define I965_FIFO_SIZE         512
 #define I945_FIFO_SIZE         127
@@ -2502,6 +2506,7 @@
 #define I855GM_FIFO_SIZE       127 /* In cachelines */
 #define I830_FIFO_SIZE         95
 
+#define VALLEYVIEW_MAX_WM      0xff
 #define G4X_MAX_WM             0x3f
 #define I915_MAX_WM            0x3f
 
@@ -2516,6 +2521,7 @@
 #define PINEVIEW_CURSOR_DFT_WM 0
 #define PINEVIEW_CURSOR_GUARD_WM       5
 
+#define VALLEYVIEW_CURSOR_MAX_WM 64
 #define I965_CURSOR_FIFO       64
 #define I965_CURSOR_MAX_WM     32
 #define I965_CURSOR_DFT_WM     8

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index fedded7..453d444 100644 (file)
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -3636,6 +3636,20 @@ static const struct intel_watermark_params g4x_cursor_wm_info = {
        2,
        G4X_FIFO_LINE_SIZE,
 };
+static const struct intel_watermark_params valleyview_wm_info = {
+       VALLEYVIEW_FIFO_SIZE,
+       VALLEYVIEW_MAX_WM,
+       VALLEYVIEW_MAX_WM,
+       2,
+       G4X_FIFO_LINE_SIZE,
+};
+static const struct intel_watermark_params valleyview_cursor_wm_info = {
+       I965_CURSOR_FIFO,
+       VALLEYVIEW_CURSOR_MAX_WM,
+       I965_CURSOR_DFT_WM,
+       2,
+       G4X_FIFO_LINE_SIZE,
+};
 static const struct intel_watermark_params i965_cursor_wm_info = {
        I965_CURSOR_FIFO,
        I965_CURSOR_MAX_WM,
@@ -4160,6 +4174,55 @@ static bool g4x_compute_srwm(struct drm_device *dev,
 
 #define single_plane_enabled(mask) is_power_of_2(mask)
 
+static void valleyview_update_wm(struct drm_device *dev)
+{
+       static const int sr_latency_ns = 12000;
+       struct drm_i915_private *dev_priv = dev->dev_private;
+       int planea_wm, planeb_wm, cursora_wm, cursorb_wm;
+       int plane_sr, cursor_sr;
+       unsigned int enabled = 0;
+
+       if (g4x_compute_wm0(dev, 0,
+                           &valleyview_wm_info, latency_ns,
+                           &valleyview_cursor_wm_info, latency_ns,
+                           &planea_wm, &cursora_wm))
+               enabled |= 1;
+
+       if (g4x_compute_wm0(dev, 1,
+                           &valleyview_wm_info, latency_ns,
+                           &valleyview_cursor_wm_info, latency_ns,
+                           &planeb_wm, &cursorb_wm))
+               enabled |= 2;
+
+       plane_sr = cursor_sr = 0;
+       if (single_plane_enabled(enabled) &&
+           g4x_compute_srwm(dev, ffs(enabled) - 1,
+                            sr_latency_ns,
+                            &valleyview_wm_info,
+                            &valleyview_cursor_wm_info,
+                            &plane_sr, &cursor_sr))
+               I915_WRITE(FW_BLC_SELF_VLV, FW_CSPWRDWNEN);
+       else
+               I915_WRITE(FW_BLC_SELF_VLV,
+                          I915_READ(FW_BLC_SELF_VLV) & ~FW_CSPWRDWNEN);
+
+       DRM_DEBUG_KMS("Setting FIFO watermarks - A: plane=%d, cursor=%d, B: plane=%d, cursor=%d, SR: plane=%d, cursor=%d\n",
+                     planea_wm, cursora_wm,
+                     planeb_wm, cursorb_wm,
+                     plane_sr, cursor_sr);
+
+       I915_WRITE(DSPFW1,
+                  (plane_sr << DSPFW_SR_SHIFT) |
+                  (cursorb_wm << DSPFW_CURSORB_SHIFT) |
+                  (planeb_wm << DSPFW_PLANEB_SHIFT) |
+                  planea_wm);
+       I915_WRITE(DSPFW2,
+                  (I915_READ(DSPFW2) & DSPFW_CURSORA_MASK) |
+                  (cursora_wm << DSPFW_CURSORA_SHIFT));
+       I915_WRITE(DSPFW3,
+                  (I915_READ(DSPFW3) | (cursor_sr << DSPFW_CURSOR_SR_SHIFT)));
+}
+
 static void g4x_update_wm(struct drm_device *dev)
 {
        static const int sr_latency_ns = 12000;
@@ -9019,6 +9082,8 @@ static void intel_init_display(struct drm_device *dev)
                        dev_priv->display.write_eld = ironlake_write_eld;
                } else
                        dev_priv->display.update_wm = NULL;
+       } else if (IS_VALLEYVIEW(dev)) {
+               dev_priv->display.update_wm = valleyview_update_wm;
        } else if (IS_PINEVIEW(dev)) {
                if (!intel_get_cxsr_latency(IS_PINEVIEW_G(dev),
                                            dev_priv->is_ddr3,