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Message-Id: <1468977071-29240-6-git-send-email-steve_longerbeam@mentor.com>
Date: Tue, 19 Jul 2016 18:11:03 -0700
From: Steve Longerbeam <slongerbeam@...il.com>
To: p.zabel@...gutronix.de, plagnioj@...osoft.com,
tomi.valkeinen@...com
Cc: dri-devel@...ts.freedesktop.org, linux-fbdev@...r.kernel.org,
linux-kernel@...r.kernel.org,
Steve Longerbeam <steve_longerbeam@...tor.com>
Subject: [PATCH v2 05/13] gpu: ipu-v3: Add IDMA channel linking support
Adds functions to link and unlink IDMAC source channels to sink
channels.
So far the following links are supported:
IPUV3_CHANNEL_IC_PRP_ENC_MEM -> IPUV3_CHANNEL_MEM_ROT_ENC
PUV3_CHANNEL_IC_PRP_VF_MEM -> IPUV3_CHANNEL_MEM_ROT_VF
IPUV3_CHANNEL_IC_PP_MEM -> IPUV3_CHANNEL_MEM_ROT_PP
More links can be added to the idmac_link_info[] array.
Signed-off-by: Steve Longerbeam <steve_longerbeam@...tor.com>
---
v2:
- replaced hardcoded channel numbers in idmac_link_info[] with
above channel names.
---
drivers/gpu/ipu-v3/ipu-common.c | 118 ++++++++++++++++++++++++++++++++++++++++
include/video/imx-ipu-v3.h | 3 +
2 files changed, 121 insertions(+)
diff --git a/drivers/gpu/ipu-v3/ipu-common.c b/drivers/gpu/ipu-v3/ipu-common.c
index 49af121..1c5aff4 100644
--- a/drivers/gpu/ipu-v3/ipu-common.c
+++ b/drivers/gpu/ipu-v3/ipu-common.c
@@ -730,6 +730,124 @@ void ipu_set_ic_src_mux(struct ipu_soc *ipu, int csi_id, bool vdi)
}
EXPORT_SYMBOL_GPL(ipu_set_ic_src_mux);
+
+/* IDMAC Channel Linking */
+
+struct idmac_link_reg_info {
+ int chno;
+ u32 reg;
+ int shift;
+ int bits;
+ u32 sel;
+};
+
+struct idmac_link_info {
+ struct idmac_link_reg_info src;
+ struct idmac_link_reg_info sink;
+};
+
+static const struct idmac_link_info idmac_link_info[] = {
+ {
+ .src = { IPUV3_CHANNEL_IC_PRP_ENC_MEM, IPU_FS_PROC_FLOW1,
+ 0, 4, 7 },
+ .sink = { IPUV3_CHANNEL_MEM_ROT_ENC, IPU_FS_PROC_FLOW2,
+ 0, 4, 1 },
+ }, {
+ .src = { IPUV3_CHANNEL_IC_PRP_VF_MEM, IPU_FS_PROC_FLOW1,
+ 8, 4, 8 },
+ .sink = { IPUV3_CHANNEL_MEM_ROT_VF, IPU_FS_PROC_FLOW2,
+ 4, 4, 1 },
+ }, {
+ .src = { IPUV3_CHANNEL_IC_PP_MEM, IPU_FS_PROC_FLOW1,
+ 16, 4, 5 },
+ .sink = { IPUV3_CHANNEL_MEM_ROT_PP, IPU_FS_PROC_FLOW2,
+ 12, 4, 3 },
+ },
+};
+
+static const struct idmac_link_info *find_idmac_link_info(
+ struct ipuv3_channel *src, struct ipuv3_channel *sink)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(idmac_link_info); i++) {
+ if (src->num == idmac_link_info[i].src.chno &&
+ sink->num == idmac_link_info[i].sink.chno)
+ return &idmac_link_info[i];
+ }
+
+ return NULL;
+}
+
+/*
+ * Links an IDMAC source channel to a sink channel.
+ */
+int ipu_idmac_link(struct ipuv3_channel *src, struct ipuv3_channel *sink)
+{
+ struct ipu_soc *ipu = src->ipu;
+ const struct idmac_link_info *link;
+ u32 src_reg, sink_reg, src_mask, sink_mask;
+ unsigned long flags;
+
+ link = find_idmac_link_info(src, sink);
+ if (!link)
+ return -EINVAL;
+
+ src_mask = ((1 << link->src.bits) - 1) << link->src.shift;
+ sink_mask = ((1 << link->sink.bits) - 1) << link->sink.shift;
+
+ spin_lock_irqsave(&ipu->lock, flags);
+
+ src_reg = ipu_cm_read(ipu, link->src.reg);
+ sink_reg = ipu_cm_read(ipu, link->sink.reg);
+
+ src_reg &= ~src_mask;
+ src_reg |= (link->src.sel << link->src.shift);
+
+ sink_reg &= ~sink_mask;
+ sink_reg |= (link->sink.sel << link->sink.shift);
+
+ ipu_cm_write(ipu, src_reg, link->src.reg);
+ ipu_cm_write(ipu, sink_reg, link->sink.reg);
+
+ spin_unlock_irqrestore(&ipu->lock, flags);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(ipu_idmac_link);
+
+/*
+ * Unlinks IDMAC source and sink channels.
+ */
+int ipu_idmac_unlink(struct ipuv3_channel *src, struct ipuv3_channel *sink)
+{
+ struct ipu_soc *ipu = src->ipu;
+ const struct idmac_link_info *link;
+ u32 src_reg, sink_reg, src_mask, sink_mask;
+ unsigned long flags;
+
+ link = find_idmac_link_info(src, sink);
+ if (!link)
+ return -EINVAL;
+
+ src_mask = ((1 << link->src.bits) - 1) << link->src.shift;
+ sink_mask = ((1 << link->sink.bits) - 1) << link->sink.shift;
+
+ spin_lock_irqsave(&ipu->lock, flags);
+
+ src_reg = ipu_cm_read(ipu, link->src.reg);
+ sink_reg = ipu_cm_read(ipu, link->sink.reg);
+
+ src_reg &= ~src_mask;
+ sink_reg &= ~sink_mask;
+
+ ipu_cm_write(ipu, src_reg, link->src.reg);
+ ipu_cm_write(ipu, sink_reg, link->sink.reg);
+
+ spin_unlock_irqrestore(&ipu->lock, flags);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(ipu_idmac_unlink);
+
struct ipu_devtype {
const char *name;
unsigned long cm_ofs;
diff --git a/include/video/imx-ipu-v3.h b/include/video/imx-ipu-v3.h
index 8a6ccaa..b252cb4 100644
--- a/include/video/imx-ipu-v3.h
+++ b/include/video/imx-ipu-v3.h
@@ -128,6 +128,7 @@ enum ipu_channel_irq {
#define IPUV3_CHANNEL_ROT_VF_MEM 49
#define IPUV3_CHANNEL_ROT_PP_MEM 50
#define IPUV3_CHANNEL_MEM_BG_SYNC_ALPHA 51
+#define IPUV3_NUM_CHANNELS 64
int ipu_map_irq(struct ipu_soc *ipu, int irq);
int ipu_idmac_channel_irq(struct ipu_soc *ipu, struct ipuv3_channel *channel,
@@ -171,6 +172,8 @@ int ipu_idmac_get_current_buffer(struct ipuv3_channel *channel);
bool ipu_idmac_buffer_is_ready(struct ipuv3_channel *channel, u32 buf_num);
void ipu_idmac_select_buffer(struct ipuv3_channel *channel, u32 buf_num);
void ipu_idmac_clear_buffer(struct ipuv3_channel *channel, u32 buf_num);
+int ipu_idmac_link(struct ipuv3_channel *src, struct ipuv3_channel *sink);
+int ipu_idmac_unlink(struct ipuv3_channel *src, struct ipuv3_channel *sink);
/*
* IPU Channel Parameter Memory (cpmem) functions
--
1.9.1
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