drm/i915: Always use INTEL_INFO() to access the device_info structure

If we make sure that all the dev_priv->info usages are wrapped by
INTEL_INFO(), we can easily modify the ->info field to be structure and
not a pointer while keeping the const protection in the INTEL_INFO()
macro.

v2: Rebased onto latest drm-nightly

Suggested-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

4 files changed, 29 insertions, 20 deletions

diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index a8a069f97c56..9b77be074e26 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -1014,7 +1014,8 @@ static int __wait_seqno(struct intel_ring_buffer *ring, u32 seqno,
                         struct timespec *timeout,
                         struct drm_i915_file_private *file_priv)
 {
-        drm_i915_private_t *dev_priv = ring->dev->dev_private;
+        struct drm_device *dev = ring->dev;
+        drm_i915_private_t *dev_priv = dev->dev_private;
         const bool irq_test_in_progress =
                 ACCESS_ONCE(dev_priv->gpu_error.test_irq_rings) & intel_ring_flag(ring);
         struct timespec before, now;
@@ -1029,7 +1030,7 @@ static int __wait_seqno(struct intel_ring_buffer *ring, u32 seqno,
 
         timeout_expire = timeout ? jiffies + timespec_to_jiffies_timeout(timeout) : 0;
 
-        if (dev_priv->info->gen >= 6 && can_wait_boost(file_priv)) {
+        if (INTEL_INFO(dev)->gen >= 6 && can_wait_boost(file_priv)) {
                 gen6_rps_boost(dev_priv);
                 if (file_priv)
                         mod_delayed_work(dev_priv->wq,
diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index 8f579bc3b26d..d4defd86b27c 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -2276,7 +2276,7 @@ static int i915_enable_vblank(struct drm_device *dev, int pipe)
                                      PIPE_VBLANK_INTERRUPT_ENABLE);
 
         /* maintain vblank delivery even in deep C-states */
-        if (dev_priv->info->gen == 3)
+        if (INTEL_INFO(dev)->gen == 3)
                 I915_WRITE(INSTPM, _MASKED_BIT_DISABLE(INSTPM_AGPBUSY_DIS));
         spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
 
@@ -2341,7 +2341,7 @@ static void i915_disable_vblank(struct drm_device *dev, int pipe)
         unsigned long irqflags;
 
         spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
-        if (dev_priv->info->gen == 3)
+        if (INTEL_INFO(dev)->gen == 3)
                 I915_WRITE(INSTPM, _MASKED_BIT_ENABLE(INSTPM_AGPBUSY_DIS));
 
         i915_disable_pipestat(dev_priv, pipe,
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 4d4a0d912b8e..1ad59d73e7d6 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -1030,7 +1030,7 @@ static void assert_fdi_tx_pll_enabled(struct drm_i915_private *dev_priv,
         u32 val;
 
         /* ILK FDI PLL is always enabled */
-        if (dev_priv->info->gen == 5)
+        if (INTEL_INFO(dev_priv->dev)->gen == 5)
                 return;
 
         /* On Haswell, DDI ports are responsible for the FDI PLL setup */
@@ -1443,7 +1443,7 @@ static void i9xx_enable_pll(struct intel_crtc *crtc)
         assert_pipe_disabled(dev_priv, crtc->pipe);
 
         /* No really, not for ILK+ */
-        BUG_ON(dev_priv->info->gen >= 5);
+        BUG_ON(INTEL_INFO(dev)->gen >= 5);
 
         /* PLL is protected by panel, make sure we can write it */
         if (IS_MOBILE(dev) && !IS_I830(dev))
@@ -1549,11 +1549,12 @@ void vlv_wait_port_ready(struct drm_i915_private *dev_priv,
  */
 static void ironlake_enable_shared_dpll(struct intel_crtc *crtc)
 {
-        struct drm_i915_private *dev_priv = crtc->base.dev->dev_private;
+        struct drm_device *dev = crtc->base.dev;
+        struct drm_i915_private *dev_priv = dev->dev_private;
         struct intel_shared_dpll *pll = intel_crtc_to_shared_dpll(crtc);
 
         /* PCH PLLs only available on ILK, SNB and IVB */
-        BUG_ON(dev_priv->info->gen < 5);
+        BUG_ON(INTEL_INFO(dev)->gen < 5);
         if (WARN_ON(pll == NULL))
                 return;
 
@@ -1578,11 +1579,12 @@ static void ironlake_enable_shared_dpll(struct intel_crtc *crtc)
 
 static void intel_disable_shared_dpll(struct intel_crtc *crtc)
 {
-        struct drm_i915_private *dev_priv = crtc->base.dev->dev_private;
+        struct drm_device *dev = crtc->base.dev;
+        struct drm_i915_private *dev_priv = dev->dev_private;
         struct intel_shared_dpll *pll = intel_crtc_to_shared_dpll(crtc);
 
         /* PCH only available on ILK+ */
-        BUG_ON(dev_priv->info->gen < 5);
+        BUG_ON(INTEL_INFO(dev)->gen < 5);
         if (WARN_ON(pll == NULL))
                return;
 
@@ -1617,7 +1619,7 @@ static void ironlake_enable_pch_transcoder(struct drm_i915_private *dev_priv,
         uint32_t reg, val, pipeconf_val;
 
         /* PCH only available on ILK+ */
-        BUG_ON(dev_priv->info->gen < 5);
+        BUG_ON(INTEL_INFO(dev)->gen < 5);
 
         /* Make sure PCH DPLL is enabled */
         assert_shared_dpll_enabled(dev_priv,
@@ -1670,7 +1672,7 @@ static void lpt_enable_pch_transcoder(struct drm_i915_private *dev_priv,
         u32 val, pipeconf_val;
 
         /* PCH only available on ILK+ */
-        BUG_ON(dev_priv->info->gen < 5);
+        BUG_ON(INTEL_INFO(dev_priv->dev)->gen < 5);
 
         /* FDI must be feeding us bits for PCH ports */
         assert_fdi_tx_enabled(dev_priv, (enum pipe) cpu_transcoder);
@@ -1851,7 +1853,8 @@ static void intel_disable_pipe(struct drm_i915_private *dev_priv,
 void intel_flush_primary_plane(struct drm_i915_private *dev_priv,
                                enum plane plane)
 {
-        u32 reg = dev_priv->info->gen >= 4 ? DSPSURF(plane) : DSPADDR(plane);
+        struct drm_device *dev = dev_priv->dev;
+        u32 reg = INTEL_INFO(dev)->gen >= 4 ? DSPSURF(plane) : DSPADDR(plane);
 
         I915_WRITE(reg, I915_READ(reg));
         POSTING_READ(reg);
@@ -7577,7 +7580,7 @@ static int intel_crtc_cursor_set(struct drm_crtc *crtc,
 
         /* we only need to pin inside GTT if cursor is non-phy */
         mutex_lock(&dev->struct_mutex);
-        if (!dev_priv->info->cursor_needs_physical) {
+        if (!INTEL_INFO(dev)->cursor_needs_physical) {
                 unsigned alignment;
 
                 if (obj->tiling_mode) {
@@ -7625,7 +7628,7 @@ static int intel_crtc_cursor_set(struct drm_crtc *crtc,
 
  finish:
         if (intel_crtc->cursor_bo) {
-                if (dev_priv->info->cursor_needs_physical) {
+                if (INTEL_INFO(dev)->cursor_needs_physical) {
                         if (intel_crtc->cursor_bo != obj)
                                 i915_gem_detach_phys_object(dev, intel_crtc->cursor_bo);
                 } else
@@ -8220,7 +8223,7 @@ void intel_mark_idle(struct drm_device *dev)
                 intel_decrease_pllclock(crtc);
         }
 
-        if (dev_priv->info->gen >= 6)
+        if (INTEL_INFO(dev)->gen >= 6)
                 gen6_rps_idle(dev->dev_private);
 }
 
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 0ed4df2c5c95..af45c2768da3 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -3903,9 +3903,10 @@ static unsigned long __i915_chipset_val(struct drm_i915_private *dev_priv)
 
 unsigned long i915_chipset_val(struct drm_i915_private *dev_priv)
 {
+        struct drm_device *dev = dev_priv->dev;
         unsigned long val;
 
-        if (dev_priv->info->gen != 5)
+        if (INTEL_INFO(dev)->gen != 5)
                 return 0;
 
         spin_lock_irq(&mchdev_lock);
@@ -3934,6 +3935,7 @@ unsigned long i915_mch_val(struct drm_i915_private *dev_priv)
 
 static u16 pvid_to_extvid(struct drm_i915_private *dev_priv, u8 pxvid)
 {
+        struct drm_device *dev = dev_priv->dev;
         static const struct v_table {
                 u16 vd; /* in .1 mil */
                 u16 vm; /* in .1 mil */
@@ -4067,7 +4069,7 @@ static u16 pvid_to_extvid(struct drm_i915_private *dev_priv, u8 pxvid)
                 { 16000, 14875, },
                 { 16125, 15000, },
         };
-        if (dev_priv->info->is_mobile)
+        if (INTEL_INFO(dev)->is_mobile)
                 return v_table[pxvid].vm;
         else
                 return v_table[pxvid].vd;
@@ -4110,7 +4112,9 @@ static void __i915_update_gfx_val(struct drm_i915_private *dev_priv)
 
 void i915_update_gfx_val(struct drm_i915_private *dev_priv)
 {
-        if (dev_priv->info->gen != 5)
+        struct drm_device *dev = dev_priv->dev;
+
+        if (INTEL_INFO(dev)->gen != 5)
                 return;
 
         spin_lock_irq(&mchdev_lock);
@@ -4159,9 +4163,10 @@ static unsigned long __i915_gfx_val(struct drm_i915_private *dev_priv)
 
 unsigned long i915_gfx_val(struct drm_i915_private *dev_priv)
 {
+        struct drm_device *dev = dev_priv->dev;
         unsigned long val;
 
-        if (dev_priv->info->gen != 5)
+        if (INTEL_INFO(dev)->gen != 5)
                 return 0;
 
         spin_lock_irq(&mchdev_lock);