drm/radeon/kms: HDMI irq support

Implements irq support for HDMI audio output. Now the polling timer
is only enabled if irq support isn't available.

Signed-off-by: Christian König <deathsimple@vodafone.de>
Signed-off-by: Dave Airlie <airlied@redhat.com>

5 files changed, 112 insertions, 56 deletions

diff --git a/drivers/gpu/drm/radeon/r600.c b/drivers/gpu/drm/radeon/r600.c
index c325cb121059..2ec423c3f3f8 100644
--- a/drivers/gpu/drm/radeon/r600.c
+++ b/drivers/gpu/drm/radeon/r600.c
@@ -2527,6 +2527,7 @@ int r600_irq_set(struct radeon_device *rdev)
         u32 cp_int_cntl = CNTX_BUSY_INT_ENABLE | CNTX_EMPTY_INT_ENABLE;
         u32 mode_int = 0;
         u32 hpd1, hpd2, hpd3, hpd4 = 0, hpd5 = 0, hpd6 = 0;
+        u32 hdmi1, hdmi2;
 
         if (!rdev->irq.installed) {
                 WARN(1, "Can't enable IRQ/MSI because no handler is installed.\n");
@@ -2540,7 +2541,9 @@ int r600_irq_set(struct radeon_device *rdev)
                 return 0;
         }
 
+        hdmi1 = RREG32(R600_HDMI_BLOCK1 + R600_HDMI_CNTL) & ~R600_HDMI_INT_EN;
         if (ASIC_IS_DCE3(rdev)) {
+                hdmi2 = RREG32(R600_HDMI_BLOCK3 + R600_HDMI_CNTL) & ~R600_HDMI_INT_EN;
                 hpd1 = RREG32(DC_HPD1_INT_CONTROL) & ~DC_HPDx_INT_EN;
                 hpd2 = RREG32(DC_HPD2_INT_CONTROL) & ~DC_HPDx_INT_EN;
                 hpd3 = RREG32(DC_HPD3_INT_CONTROL) & ~DC_HPDx_INT_EN;
@@ -2550,6 +2553,7 @@ int r600_irq_set(struct radeon_device *rdev)
                         hpd6 = RREG32(DC_HPD6_INT_CONTROL) & ~DC_HPDx_INT_EN;
                 }
         } else {
+                hdmi2 = RREG32(R600_HDMI_BLOCK2 + R600_HDMI_CNTL) & ~R600_HDMI_INT_EN;
                 hpd1 = RREG32(DC_HOT_PLUG_DETECT1_INT_CONTROL) & ~DC_HPDx_INT_EN;
                 hpd2 = RREG32(DC_HOT_PLUG_DETECT2_INT_CONTROL) & ~DC_HPDx_INT_EN;
                 hpd3 = RREG32(DC_HOT_PLUG_DETECT3_INT_CONTROL) & ~DC_HPDx_INT_EN;
@@ -2591,10 +2595,20 @@ int r600_irq_set(struct radeon_device *rdev)
                 DRM_DEBUG("r600_irq_set: hpd 6\n");
                 hpd6 |= DC_HPDx_INT_EN;
         }
+        if (rdev->irq.hdmi[0]) {
+                DRM_DEBUG("r600_irq_set: hdmi 1\n");
+                hdmi1 |= R600_HDMI_INT_EN;
+        }
+        if (rdev->irq.hdmi[1]) {
+                DRM_DEBUG("r600_irq_set: hdmi 2\n");
+                hdmi2 |= R600_HDMI_INT_EN;
+        }
 
         WREG32(CP_INT_CNTL, cp_int_cntl);
         WREG32(DxMODE_INT_MASK, mode_int);
+        WREG32(R600_HDMI_BLOCK1 + R600_HDMI_CNTL, hdmi1);
         if (ASIC_IS_DCE3(rdev)) {
+                WREG32(R600_HDMI_BLOCK3 + R600_HDMI_CNTL, hdmi2);
                 WREG32(DC_HPD1_INT_CONTROL, hpd1);
                 WREG32(DC_HPD2_INT_CONTROL, hpd2);
                 WREG32(DC_HPD3_INT_CONTROL, hpd3);
@@ -2604,6 +2618,7 @@ int r600_irq_set(struct radeon_device *rdev)
                         WREG32(DC_HPD6_INT_CONTROL, hpd6);
                 }
         } else {
+                WREG32(R600_HDMI_BLOCK2 + R600_HDMI_CNTL, hdmi2);
                 WREG32(DC_HOT_PLUG_DETECT1_INT_CONTROL, hpd1);
                 WREG32(DC_HOT_PLUG_DETECT2_INT_CONTROL, hpd2);
                 WREG32(DC_HOT_PLUG_DETECT3_INT_CONTROL, hpd3);
@@ -2687,6 +2702,18 @@ static inline void r600_irq_ack(struct radeon_device *rdev,
                         WREG32(DC_HPD6_INT_CONTROL, tmp);
                 }
         }
+        if (RREG32(R600_HDMI_BLOCK1 + R600_HDMI_STATUS) & R600_HDMI_INT_PENDING) {
+                WREG32_P(R600_HDMI_BLOCK1 + R600_HDMI_CNTL, R600_HDMI_INT_ACK, ~R600_HDMI_INT_ACK);
+        }
+        if (ASIC_IS_DCE3(rdev)) {
+                if (RREG32(R600_HDMI_BLOCK3 + R600_HDMI_STATUS) & R600_HDMI_INT_PENDING) {
+                        WREG32_P(R600_HDMI_BLOCK3 + R600_HDMI_CNTL, R600_HDMI_INT_ACK, ~R600_HDMI_INT_ACK);
+                }
+        } else {
+                if (RREG32(R600_HDMI_BLOCK2 + R600_HDMI_STATUS) & R600_HDMI_INT_PENDING) {
+                        WREG32_P(R600_HDMI_BLOCK2 + R600_HDMI_CNTL, R600_HDMI_INT_ACK, ~R600_HDMI_INT_ACK);
+                }
+        }
 }
 
 void r600_irq_disable(struct radeon_device *rdev)
@@ -2740,6 +2767,8 @@ static inline u32 r600_get_ih_wptr(struct radeon_device *rdev)
  *     19         1  FP Hot plug detection B
  *     19         2  DAC A auto-detection
  *     19         3  DAC B auto-detection
+ *     21         4  HDMI block A
+ *     21         5  HDMI block B
  *    176         -  CP_INT RB
  *    177         -  CP_INT IB1
  *    178         -  CP_INT IB2
@@ -2879,6 +2908,10 @@ restart_ih:
                                 break;
                         }
                         break;
+                case 21: /* HDMI */
+                        DRM_DEBUG("IH: HDMI: 0x%x\n", src_data);
+                        r600_audio_schedule_polling(rdev);
+                        break;
                 case 176: /* CP_INT in ring buffer */
                 case 177: /* CP_INT in IB1 */
                 case 178: /* CP_INT in IB2 */
diff --git a/drivers/gpu/drm/radeon/r600_audio.c b/drivers/gpu/drm/radeon/r600_audio.c
index ed8d3989f172..2b26553c352c 100644
--- a/drivers/gpu/drm/radeon/r600_audio.c
+++ b/drivers/gpu/drm/radeon/r600_audio.c
@@ -104,6 +104,15 @@ uint8_t r600_audio_category_code(struct radeon_device *rdev)
 }
 
 /*
+ * schedule next audio update event
+ */
+void r600_audio_schedule_polling(struct radeon_device *rdev)
+{
+        mod_timer(&rdev->audio_timer,
+                jiffies + msecs_to_jiffies(AUDIO_TIMER_INTERVALL));
+}
+
+/*
  * update all hdmi interfaces with current audio parameters
  */
 static void r600_audio_update_hdmi(unsigned long param)
@@ -136,16 +145,12 @@ static void r600_audio_update_hdmi(unsigned long param)
 
         list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
                 struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
-                if (radeon_encoder->audio_polling_active) {
-                        still_going = 1;
-                        if (changes || r600_hdmi_buffer_status_changed(encoder))
-                                r600_hdmi_update_audio_settings(encoder);
-                }
+                still_going |= radeon_encoder->audio_polling_active;
+                if (changes || r600_hdmi_buffer_status_changed(encoder))
+                        r600_hdmi_update_audio_settings(encoder);
         }
 
-        if(still_going)
-                mod_timer(&rdev->audio_timer,
-                        jiffies + msecs_to_jiffies(AUDIO_TIMER_INTERVALL));
+        if(still_going) r600_audio_schedule_polling(rdev);
 }
 
 /*
diff --git a/drivers/gpu/drm/radeon/r600_hdmi.c b/drivers/gpu/drm/radeon/r600_hdmi.c
index d014472d0d3f..40b1aca6d1f4 100644
--- a/drivers/gpu/drm/radeon/r600_hdmi.c
+++ b/drivers/gpu/drm/radeon/r600_hdmi.c
@@ -290,17 +290,15 @@ void r600_hdmi_audio_workaround(struct drm_encoder *encoder)
         if (!offset)
                 return;
 
-        if (r600_hdmi_is_audio_buffer_filled(encoder)) {
-                /* disable audio workaround and start delivering of audio frames */
-                WREG32_P(offset+R600_HDMI_CNTL, 0x00000001, ~0x00001001);
+        if (!radeon_encoder->hdmi_audio_workaround ||
+                r600_hdmi_is_audio_buffer_filled(encoder)) {
 
-        } else if (radeon_encoder->hdmi_audio_workaround) {
-                /* enable audio workaround and start delivering of audio frames */
-                WREG32_P(offset+R600_HDMI_CNTL, 0x00001001, ~0x00001001);
+                /* disable audio workaround */
+                WREG32_P(offset+R600_HDMI_CNTL, 0x00000001, ~0x00001001);
 
         } else {
-                /* disable audio workaround and stop delivering of audio frames */
-                WREG32_P(offset+R600_HDMI_CNTL, 0x00000000, ~0x00001001);
+                /* enable audio workaround */
+                WREG32_P(offset+R600_HDMI_CNTL, 0x00001001, ~0x00001001);
         }
 }
 
@@ -345,9 +343,6 @@ void r600_hdmi_setmode(struct drm_encoder *encoder, struct drm_display_mode *mod
 
         /* audio packets per line, does anyone know how to calc this ? */
         WREG32_P(offset+R600_HDMI_CNTL, 0x00040000, ~0x001F0000);
-
-        /* update? reset? don't realy know */
-        WREG32_P(offset+R600_HDMI_CNTL, 0x14000000, ~0x14000000);
 }
 
 /*
@@ -416,9 +411,6 @@ void r600_hdmi_update_audio_settings(struct drm_encoder *encoder)
         r600_hdmi_audioinfoframe(encoder, channels-1, 0, 0, 0, 0, 0, 0, 0);
 
         r600_hdmi_audio_workaround(encoder);
-
-        /* update? reset? don't realy know */
-        WREG32_P(offset+R600_HDMI_CNTL, 0x04000000, ~0x04000000);
 }
 
 static int r600_hdmi_find_free_block(struct drm_device *dev)
@@ -487,6 +479,7 @@ void r600_hdmi_enable(struct drm_encoder *encoder)
         struct drm_device *dev = encoder->dev;
         struct radeon_device *rdev = dev->dev_private;
         struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
+        uint32_t offset;
 
         if (ASIC_IS_DCE4(rdev))
                 return;
@@ -500,10 +493,10 @@ void r600_hdmi_enable(struct drm_encoder *encoder)
                 }
         }
 
+        offset = radeon_encoder->hdmi_offset;
         if (ASIC_IS_DCE32(rdev) && !ASIC_IS_DCE4(rdev)) {
                 WREG32_P(radeon_encoder->hdmi_config_offset + 0x4, 0x1, ~0x1);
         } else if (rdev->family >= CHIP_R600 && !ASIC_IS_DCE3(rdev)) {
-                int offset = radeon_encoder->hdmi_offset;
                 switch (radeon_encoder->encoder_id) {
                 case ENCODER_OBJECT_ID_INTERNAL_KLDSCP_TMDS1:
                         WREG32_P(AVIVO_TMDSA_CNTL, 0x4, ~0x4);
@@ -519,7 +512,20 @@ void r600_hdmi_enable(struct drm_encoder *encoder)
                 }
         }
 
-        r600_audio_enable_polling(encoder);
+        if (rdev->irq.installed
+            && rdev->family != CHIP_RS600
+            && rdev->family != CHIP_RS690
+            && rdev->family != CHIP_RS740) {
+
+                /* if irq is available use it */
+                rdev->irq.hdmi[offset == R600_HDMI_BLOCK1 ? 0 : 1] = true;
+                radeon_irq_set(rdev);
+
+                r600_audio_disable_polling(encoder);
+        } else {
+                /* if not fallback to polling */
+                r600_audio_enable_polling(encoder);
+        }
 
         DRM_DEBUG("Enabling HDMI interface @ 0x%04X for encoder 0x%x\n",
                 radeon_encoder->hdmi_offset, radeon_encoder->encoder_id);
@@ -533,24 +539,30 @@ void r600_hdmi_disable(struct drm_encoder *encoder)
         struct drm_device *dev = encoder->dev;
         struct radeon_device *rdev = dev->dev_private;
         struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
+        uint8_t offset;
 
         if (ASIC_IS_DCE4(rdev))
                 return;
 
-        if (!radeon_encoder->hdmi_offset) {
+        offset = radeon_encoder->hdmi_offset;
+        if (!offset) {
                 dev_err(rdev->dev, "Disabling not enabled HDMI\n");
                 return;
         }
 
-        r600_audio_disable_polling(encoder);
-
         DRM_DEBUG("Disabling HDMI interface @ 0x%04X for encoder 0x%x\n",
-                radeon_encoder->hdmi_offset, radeon_encoder->encoder_id);
+                offset, radeon_encoder->encoder_id);
+
+        /* disable irq */
+        rdev->irq.hdmi[offset == R600_HDMI_BLOCK1 ? 0 : 1] = false;
+        radeon_irq_set(rdev);
+
+        /* disable polling */
+        r600_audio_disable_polling(encoder);
 
         if (ASIC_IS_DCE32(rdev) && !ASIC_IS_DCE4(rdev)) {
                 WREG32_P(radeon_encoder->hdmi_config_offset + 0x4, 0, ~0x1);
         } else if (rdev->family >= CHIP_R600 && !ASIC_IS_DCE3(rdev)) {
-                int offset = radeon_encoder->hdmi_offset;
                 switch (radeon_encoder->encoder_id) {
                 case ENCODER_OBJECT_ID_INTERNAL_KLDSCP_TMDS1:
                         WREG32_P(AVIVO_TMDSA_CNTL, 0, ~0x4);
diff --git a/drivers/gpu/drm/radeon/r600_reg.h b/drivers/gpu/drm/radeon/r600_reg.h
index 7b1d22370f6e..d84612ae47e0 100644
--- a/drivers/gpu/drm/radeon/r600_reg.h
+++ b/drivers/gpu/drm/radeon/r600_reg.h
@@ -157,33 +157,36 @@
 #define R600_HDMI_BLOCK3                  0x7800
 
 /* HDMI registers */
-#define R600_HDMI_ENABLE           0x00
-#define R600_HDMI_STATUS           0x04
-#define R600_HDMI_CNTL             0x08
-#define R600_HDMI_UNKNOWN_0        0x0C
-#define R600_HDMI_AUDIOCNTL        0x10
-#define R600_HDMI_VIDEOCNTL        0x14
-#define R600_HDMI_VERSION          0x18
-#define R600_HDMI_UNKNOWN_1        0x28
-#define R600_HDMI_VIDEOINFOFRAME_0 0x54
-#define R600_HDMI_VIDEOINFOFRAME_1 0x58
-#define R600_HDMI_VIDEOINFOFRAME_2 0x5c
-#define R600_HDMI_VIDEOINFOFRAME_3 0x60
-#define R600_HDMI_32kHz_CTS        0xac
-#define R600_HDMI_32kHz_N          0xb0
-#define R600_HDMI_44_1kHz_CTS      0xb4
-#define R600_HDMI_44_1kHz_N        0xb8
-#define R600_HDMI_48kHz_CTS        0xbc
-#define R600_HDMI_48kHz_N          0xc0
-#define R600_HDMI_AUDIOINFOFRAME_0 0xcc
-#define R600_HDMI_AUDIOINFOFRAME_1 0xd0
-#define R600_HDMI_IEC60958_1       0xd4
-#define R600_HDMI_IEC60958_2       0xd8
-#define R600_HDMI_UNKNOWN_2        0xdc
-#define R600_HDMI_AUDIO_DEBUG_0    0xe0
-#define R600_HDMI_AUDIO_DEBUG_1    0xe4
-#define R600_HDMI_AUDIO_DEBUG_2    0xe8
-#define R600_HDMI_AUDIO_DEBUG_3    0xec
+#define R600_HDMI_ENABLE                0x00
+#define R600_HDMI_STATUS                0x04
+#       define R600_HDMI_INT_PENDING    (1 << 29)
+#define R600_HDMI_CNTL                  0x08
+#       define R600_HDMI_INT_EN         (1 << 28)
+#       define R600_HDMI_INT_ACK        (1 << 29)
+#define R600_HDMI_UNKNOWN_0             0x0C
+#define R600_HDMI_AUDIOCNTL             0x10
+#define R600_HDMI_VIDEOCNTL             0x14
+#define R600_HDMI_VERSION               0x18
+#define R600_HDMI_UNKNOWN_1             0x28
+#define R600_HDMI_VIDEOINFOFRAME_0      0x54
+#define R600_HDMI_VIDEOINFOFRAME_1      0x58
+#define R600_HDMI_VIDEOINFOFRAME_2      0x5c
+#define R600_HDMI_VIDEOINFOFRAME_3      0x60
+#define R600_HDMI_32kHz_CTS             0xac
+#define R600_HDMI_32kHz_N               0xb0
+#define R600_HDMI_44_1kHz_CTS           0xb4
+#define R600_HDMI_44_1kHz_N             0xb8
+#define R600_HDMI_48kHz_CTS             0xbc
+#define R600_HDMI_48kHz_N               0xc0
+#define R600_HDMI_AUDIOINFOFRAME_0      0xcc
+#define R600_HDMI_AUDIOINFOFRAME_1      0xd0
+#define R600_HDMI_IEC60958_1            0xd4
+#define R600_HDMI_IEC60958_2            0xd8
+#define R600_HDMI_UNKNOWN_2             0xdc
+#define R600_HDMI_AUDIO_DEBUG_0         0xe0
+#define R600_HDMI_AUDIO_DEBUG_1         0xe4
+#define R600_HDMI_AUDIO_DEBUG_2         0xe8
+#define R600_HDMI_AUDIO_DEBUG_3         0xec
 
 /* HDMI additional config base register addresses */
 #define R600_HDMI_CONFIG1                 0x7600
diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h
index 42217af58145..ab29d972a167 100644
--- a/drivers/gpu/drm/radeon/radeon.h
+++ b/drivers/gpu/drm/radeon/radeon.h
@@ -376,6 +376,8 @@ struct radeon_irq {
         wait_queue_head_t       vblank_queue;
         /* FIXME: use defines for max hpd/dacs */
         bool            hpd[6];
+        /* FIXME: use defines for max HDMI blocks */
+        bool            hdmi[2];
         spinlock_t sw_lock;
         int sw_refcount;
 };
@@ -1332,6 +1334,7 @@ extern int r600_audio_bits_per_sample(struct radeon_device *rdev);
 extern int r600_audio_rate(struct radeon_device *rdev);
 extern uint8_t r600_audio_status_bits(struct radeon_device *rdev);
 extern uint8_t r600_audio_category_code(struct radeon_device *rdev);
+extern void r600_audio_schedule_polling(struct radeon_device *rdev);
 extern void r600_audio_enable_polling(struct drm_encoder *encoder);
 extern void r600_audio_disable_polling(struct drm_encoder *encoder);
 extern void r600_audio_fini(struct radeon_device *rdev);