drm/radeon/kms: HDMI support for R600 KMS

Adding basic HDMI support for R600 KMS, ported from radeonhd ddx.

[airlied:- checkpatch cleanups]
Signed-off-by: Christian Koenig <deathsimple@vodafone.de>
Signed-off-by: Dave Airlie <airlied@redhat.com>

9 files changed, 895 insertions, 6 deletions

diff --git a/drivers/gpu/drm/radeon/Makefile b/drivers/gpu/drm/radeon/Makefile
index feb52eee4314..b5f5fe75e6af 100644
--- a/drivers/gpu/drm/radeon/Makefile
+++ b/drivers/gpu/drm/radeon/Makefile
@@ -49,7 +49,7 @@ radeon-y += radeon_device.o radeon_kms.o \
         radeon_cs.o radeon_bios.o radeon_benchmark.o r100.o r300.o r420.o \
         rs400.o rs600.o rs690.o rv515.o r520.o r600.o rv770.o radeon_test.o \
         r200.o radeon_legacy_tv.o r600_cs.o r600_blit.o r600_blit_shaders.o \
-        r600_blit_kms.o radeon_pm.o atombios_dp.o
+        r600_blit_kms.o radeon_pm.o atombios_dp.o r600_audio.o r600_hdmi.o
 
 radeon-$(CONFIG_COMPAT) += radeon_ioc32.o
 
diff --git a/drivers/gpu/drm/radeon/r600.c b/drivers/gpu/drm/radeon/r600.c
index e145faac9904..5c6058c6ddde 100644
--- a/drivers/gpu/drm/radeon/r600.c
+++ b/drivers/gpu/drm/radeon/r600.c
@@ -2067,6 +2067,10 @@ int r600_init(struct radeon_device *rdev)
                         rdev->accel_working = false;
                 }
         }
+
+        r = r600_audio_init(rdev);
+        if (r)
+                return r; /* TODO error handling */
         return 0;
 }
 
@@ -2075,6 +2079,7 @@ void r600_fini(struct radeon_device *rdev)
         /* Suspend operations */
         r600_suspend(rdev);
 
+        r600_audio_fini(rdev);
         r600_blit_fini(rdev);
         r600_irq_fini(rdev);
         radeon_irq_kms_fini(rdev);
diff --git a/drivers/gpu/drm/radeon/r600_audio.c b/drivers/gpu/drm/radeon/r600_audio.c
new file mode 100644
index 000000000000..99e2c3891a7d
--- /dev/null
+++ b/drivers/gpu/drm/radeon/r600_audio.c
@@ -0,0 +1,267 @@
+/*
+ * Copyright 2008 Advanced Micro Devices, Inc.
+ * Copyright 2008 Red Hat Inc.
+ * Copyright 2009 Christian König.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Authors: Christian König
+ */
+#include "drmP.h"
+#include "radeon.h"
+#include "radeon_reg.h"
+#include "atom.h"
+
+#define AUDIO_TIMER_INTERVALL 100 /* 1/10 sekund should be enough */
+
+/*
+ * check if the chipset is supported
+ */
+static int r600_audio_chipset_supported(struct radeon_device *rdev)
+{
+        return rdev->family >= CHIP_R600
+                || rdev->family == CHIP_RS600
+                || rdev->family == CHIP_RS690
+                || rdev->family == CHIP_RS740;
+}
+
+/*
+ * current number of channels
+ */
+static int r600_audio_channels(struct radeon_device *rdev)
+{
+        return (RREG32(R600_AUDIO_RATE_BPS_CHANNEL) & 0x7) + 1;
+}
+
+/*
+ * current bits per sample
+ */
+static int r600_audio_bits_per_sample(struct radeon_device *rdev)
+{
+        uint32_t value = (RREG32(R600_AUDIO_RATE_BPS_CHANNEL) & 0xF0) >> 4;
+        switch (value) {
+        case 0x0: return  8;
+        case 0x1: return 16;
+        case 0x2: return 20;
+        case 0x3: return 24;
+        case 0x4: return 32;
+        }
+
+        DRM_ERROR("Unknown bits per sample 0x%x using 16 instead.\n", (int)value);
+
+        return 16;
+}
+
+/*
+ * current sampling rate in HZ
+ */
+static int r600_audio_rate(struct radeon_device *rdev)
+{
+        uint32_t value = RREG32(R600_AUDIO_RATE_BPS_CHANNEL);
+        uint32_t result;
+
+        if (value & 0x4000)
+                result = 44100;
+        else
+                result = 48000;
+
+        result *= ((value >> 11) & 0x7) + 1;
+        result /= ((value >> 8) & 0x7) + 1;
+
+        return result;
+}
+
+/*
+ * iec 60958 status bits
+ */
+static uint8_t r600_audio_status_bits(struct radeon_device *rdev)
+{
+        return RREG32(R600_AUDIO_STATUS_BITS) & 0xff;
+}
+
+/*
+ * iec 60958 category code
+ */
+static uint8_t r600_audio_category_code(struct radeon_device *rdev)
+{
+        return (RREG32(R600_AUDIO_STATUS_BITS) >> 8) & 0xff;
+}
+
+/*
+ * update all hdmi interfaces with current audio parameters
+ */
+static void r600_audio_update_hdmi(unsigned long param)
+{
+        struct radeon_device *rdev = (struct radeon_device *)param;
+        struct drm_device *dev = rdev->ddev;
+
+        int channels = r600_audio_channels(rdev);
+        int rate = r600_audio_rate(rdev);
+        int bps = r600_audio_bits_per_sample(rdev);
+        uint8_t status_bits = r600_audio_status_bits(rdev);
+        uint8_t category_code = r600_audio_category_code(rdev);
+
+        struct drm_encoder *encoder;
+        int changes = 0;
+
+        changes |= channels != rdev->audio_channels;
+        changes |= rate != rdev->audio_rate;
+        changes |= bps != rdev->audio_bits_per_sample;
+        changes |= status_bits != rdev->audio_status_bits;
+        changes |= category_code != rdev->audio_category_code;
+
+        if (changes) {
+                rdev->audio_channels = channels;
+                rdev->audio_rate = rate;
+                rdev->audio_bits_per_sample = bps;
+                rdev->audio_status_bits = status_bits;
+                rdev->audio_category_code = category_code;
+        }
+
+        list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
+                if (changes || r600_hdmi_buffer_status_changed(encoder))