drm/radeon/kms: use defined constants for crtc/hpd count instead of hard-coded value 6

radeon_driver_irq_preinstall_kms and radeon_driver_irq_uninstall_kms
hard code the loop to 6 which happens to be the current maximum
number of crtcs and hpd pins; if one day an ASIC with more crtcs
(or hpd pins) comes out, this is a trouble waiting to happen.

introduce constants for maximum CRTC count, maximum HPD pins count
and maximum HDMI blocks count (per FIXME in radeon_irq structure)
and correct the loops in radeon_driver_irq_preinstall_kms and
radeon_driver_irq_uninstall_kms

v2: take care of goofs pointed out by Alex Deucher

Signed-off-by: Ilija Hadzic <ihadzic@research.bell-labs.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

2 files changed, 16 insertions, 15 deletions

diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h
index 3a78f8666fa7..00f6dc4973a9 100644
--- a/drivers/gpu/drm/radeon/radeon.h
+++ b/drivers/gpu/drm/radeon/radeon.h
@@ -437,25 +437,26 @@ union radeon_irq_stat_regs {
         struct evergreen_irq_stat_regs evergreen;
 };
 
+#define RADEON_MAX_HPD_PINS 6
+#define RADEON_MAX_CRTCS 6
+#define RADEON_MAX_HDMI_BLOCKS 2
+
 struct radeon_irq {
         bool            installed;
         bool            sw_int;
-        /* FIXME: use a define max crtc rather than hardcode it */
-        bool            crtc_vblank_int[6];
-        bool            pflip[6];
+        bool            crtc_vblank_int[RADEON_MAX_CRTCS];
+        bool            pflip[RADEON_MAX_CRTCS];
         wait_queue_head_t       vblank_queue;
-        /* FIXME: use defines for max hpd/dacs */
-        bool            hpd[6];
+        bool            hpd[RADEON_MAX_HPD_PINS];
         bool            gui_idle;
         bool            gui_idle_acked;
         wait_queue_head_t       idle_queue;
-        /* FIXME: use defines for max HDMI blocks */
-        bool            hdmi[2];
+        bool            hdmi[RADEON_MAX_HDMI_BLOCKS];
         spinlock_t sw_lock;
         int sw_refcount;
         union radeon_irq_stat_regs stat_regs;
-        spinlock_t pflip_lock[6];
-        int pflip_refcount[6];
+        spinlock_t pflip_lock[RADEON_MAX_CRTCS];
+        int pflip_refcount[RADEON_MAX_CRTCS];
 };
 
 int radeon_irq_kms_init(struct radeon_device *rdev);
diff --git a/drivers/gpu/drm/radeon/radeon_irq_kms.c b/drivers/gpu/drm/radeon/radeon_irq_kms.c
index 9ec830c77af0..93da85515cd2 100644
--- a/drivers/gpu/drm/radeon/radeon_irq_kms.c
+++ b/drivers/gpu/drm/radeon/radeon_irq_kms.c
@@ -67,10 +67,10 @@ void radeon_driver_irq_preinstall_kms(struct drm_device *dev)
         /* Disable *all* interrupts */
         rdev->irq.sw_int = false;
         rdev->irq.gui_idle = false;
-        for (i = 0; i < rdev->num_crtc; i++)
-                rdev->irq.crtc_vblank_int[i] = false;
-        for (i = 0; i < 6; i++) {
+        for (i = 0; i < RADEON_MAX_HPD_PINS; i++)
                 rdev->irq.hpd[i] = false;
+        for (i = 0; i < RADEON_MAX_CRTCS; i++) {
+                rdev->irq.crtc_vblank_int[i] = false;
                 rdev->irq.pflip[i] = false;
         }
         radeon_irq_set(rdev);
@@ -99,10 +99,10 @@ void radeon_driver_irq_uninstall_kms(struct drm_device *dev)
         /* Disable *all* interrupts */
         rdev->irq.sw_int = false;
         rdev->irq.gui_idle = false;
-        for (i = 0; i < rdev->num_crtc; i++)
-                rdev->irq.crtc_vblank_int[i] = false;
-        for (i = 0; i < 6; i++) {
+        for (i = 0; i < RADEON_MAX_HPD_PINS; i++)
                 rdev->irq.hpd[i] = false;
+        for (i = 0; i < RADEON_MAX_CRTCS; i++) {
+                rdev->irq.crtc_vblank_int[i] = false;
                 rdev->irq.pflip[i] = false;
         }
         radeon_irq_set(rdev);