drm/i915: Constify some watermark data

hsw_pipe_wm_parameters and hsw_wm_maximums typically are read only. Make
them const.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 77dfd14..3dd2fd8 100644 (file)
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -2205,7 +2205,7 @@ struct intel_wm_config {
  * For both WM_PIPE and WM_LP.
  * mem_value must be in 0.1us units.
  */
-static uint32_t ilk_compute_pri_wm(struct hsw_pipe_wm_parameters *params,
+static uint32_t ilk_compute_pri_wm(const struct hsw_pipe_wm_parameters *params,
                                   uint32_t mem_value,
                                   bool is_lp)
 {
@@ -2234,7 +2234,7 @@ static uint32_t ilk_compute_pri_wm(struct hsw_pipe_wm_parameters *params,
  * For both WM_PIPE and WM_LP.
  * mem_value must be in 0.1us units.
  */
-static uint32_t ilk_compute_spr_wm(struct hsw_pipe_wm_parameters *params,
+static uint32_t ilk_compute_spr_wm(const struct hsw_pipe_wm_parameters *params,
                                   uint32_t mem_value)
 {
        uint32_t method1, method2;
@@ -2257,7 +2257,7 @@ static uint32_t ilk_compute_spr_wm(struct hsw_pipe_wm_parameters *params,
  * For both WM_PIPE and WM_LP.
  * mem_value must be in 0.1us units.
  */
-static uint32_t ilk_compute_cur_wm(struct hsw_pipe_wm_parameters *params,
+static uint32_t ilk_compute_cur_wm(const struct hsw_pipe_wm_parameters *params,
                                   uint32_t mem_value)
 {
        if (!params->active || !params->cur.enabled)
@@ -2271,7 +2271,7 @@ static uint32_t ilk_compute_cur_wm(struct hsw_pipe_wm_parameters *params,
 }
 
 /* Only for WM_LP. */
-static uint32_t ilk_compute_fbc_wm(struct hsw_pipe_wm_parameters *params,
+static uint32_t ilk_compute_fbc_wm(const struct hsw_pipe_wm_parameters *params,
                                   uint32_t pri_val)
 {
        if (!params->active || !params->pri.enabled)
@@ -2422,7 +2422,7 @@ static bool ilk_check_wm(int level,
 
 static void ilk_compute_wm_level(struct drm_i915_private *dev_priv,
                                 int level,
-                                struct hsw_pipe_wm_parameters *p,
+                                const struct hsw_pipe_wm_parameters *p,
                                 struct intel_wm_level *result)
 {
        uint16_t pri_latency = dev_priv->wm.pri_latency[level];
@@ -2444,8 +2444,8 @@ static void ilk_compute_wm_level(struct drm_i915_private *dev_priv,
 }
 
 static bool hsw_compute_lp_wm(struct drm_i915_private *dev_priv,
-                             int level, struct hsw_wm_maximums *max,
-                             struct hsw_pipe_wm_parameters *params,
+                             int level, const struct hsw_wm_maximums *max,
+                             const struct hsw_pipe_wm_parameters *params,
                              struct intel_wm_level *result)
 {
        enum pipe pipe;
@@ -2465,7 +2465,7 @@ static bool hsw_compute_lp_wm(struct drm_i915_private *dev_priv,
 
 static uint32_t hsw_compute_wm_pipe(struct drm_i915_private *dev_priv,
                                    enum pipe pipe,
-                                   struct hsw_pipe_wm_parameters *params)
+                                   const struct hsw_pipe_wm_parameters *params)
 {
        uint32_t pri_val, cur_val, spr_val;
        /* WM0 latency values stored in 0.1us units */
@@ -2673,8 +2673,8 @@ static void hsw_compute_wm_parameters(struct drm_device *dev,
 }
 
 static void hsw_compute_wm_results(struct drm_device *dev,
-                                  struct hsw_pipe_wm_parameters *params,
-                                  struct hsw_wm_maximums *lp_maximums,
+                                  const struct hsw_pipe_wm_parameters *params,
+                                  const struct hsw_wm_maximums *lp_maximums,
                                   struct hsw_wm_values *results)
 {
        struct drm_i915_private *dev_priv = dev->dev_private;