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Subject[PATCH 1/2] venus: use on-chip interconnect API
Date
This aims to add a requests for bandwidth scaling depending
on the resolution and framerate (macroblocks per second). The
exact value ff the requested bandwidth is get from a
pre-calculated tables for encoder and decoder.

Signed-off-by: Stanimir Varbanov <stanimir.varbanov@linaro.org>
---
drivers/media/platform/qcom/venus/core.c | 34 +++++++++++
drivers/media/platform/qcom/venus/core.h | 14 +++++
drivers/media/platform/qcom/venus/helpers.c | 67 ++++++++++++++++++++-
3 files changed, 114 insertions(+), 1 deletion(-)

diff --git a/drivers/media/platform/qcom/venus/core.c b/drivers/media/platform/qcom/venus/core.c
index 0acc7576cc58..19cbe9d5d028 100644
--- a/drivers/media/platform/qcom/venus/core.c
+++ b/drivers/media/platform/qcom/venus/core.c
@@ -5,6 +5,7 @@
*/
#include <linux/clk.h>
#include <linux/init.h>
+#include <linux/interconnect.h>
#include <linux/ioctl.h>
#include <linux/list.h>
#include <linux/module.h>
@@ -239,6 +240,14 @@ static int venus_probe(struct platform_device *pdev)
if (IS_ERR(core->base))
return PTR_ERR(core->base);

+ core->video_path = of_icc_get(dev, "video-mem");
+ if (IS_ERR(core->video_path))
+ return PTR_ERR(core->video_path);
+
+ core->cpucfg_path = of_icc_get(dev, "cpu-cfg");
+ if (IS_ERR(core->cpucfg_path))
+ return PTR_ERR(core->cpucfg_path);
+
core->irq = platform_get_irq(pdev, 0);
if (core->irq < 0)
return core->irq;
@@ -273,6 +282,10 @@ static int venus_probe(struct platform_device *pdev)
if (ret)
return ret;

+ ret = icc_set_bw(core->cpucfg_path, 0, kbps_to_icc(1000));
+ if (ret)
+ return ret;
+
ret = hfi_create(core, &venus_core_ops);
if (ret)
return ret;
@@ -355,6 +368,9 @@ static int venus_remove(struct platform_device *pdev)
pm_runtime_put_sync(dev);
pm_runtime_disable(dev);

+ icc_put(core->video_path);
+ icc_put(core->cpucfg_path);
+
v4l2_device_unregister(&core->v4l2_dev);

return ret;
@@ -464,9 +480,27 @@ static const struct freq_tbl sdm845_freq_table[] = {
{ 244800, 100000000 }, /* 1920x1080@30 */
};

+static const struct bw_tbl sdm845_bw_table_enc[] = {
+ { 1944000, 1612000, 0, 2416000, 0 }, /* 3840x2160@60 */
+ { 972000, 951000, 0, 1434000, 0 }, /* 3840x2160@30 */
+ { 489600, 723000, 0, 973000, 0 }, /* 1920x1080@60 */
+ { 244800, 370000, 0, 495000, 0 }, /* 1920x1080@30 */
+};
+
+static const struct bw_tbl sdm845_bw_table_dec[] = {
+ { 2073600, 3929000, 0, 5551000, 0 }, /* 4096x2160@60 */
+ { 1036800, 1987000, 0, 2797000, 0 }, /* 4096x2160@30 */
+ { 489600, 1040000, 0, 1298000, 0 }, /* 1920x1080@60 */
+ { 244800, 530000, 0, 659000, 0 }, /* 1920x1080@30 */
+};
+
static const struct venus_resources sdm845_res = {
.freq_tbl = sdm845_freq_table,
.freq_tbl_size = ARRAY_SIZE(sdm845_freq_table),
+ .bw_tbl_enc = sdm845_bw_table_enc,
+ .bw_tbl_enc_size = ARRAY_SIZE(sdm845_bw_table_enc),
+ .bw_tbl_dec = sdm845_bw_table_dec,
+ .bw_tbl_dec_size = ARRAY_SIZE(sdm845_bw_table_dec),
.clks = {"core", "iface", "bus" },
.clks_num = 3,
.max_load = 3110400, /* 4096x2160@90 */
diff --git a/drivers/media/platform/qcom/venus/core.h b/drivers/media/platform/qcom/venus/core.h
index 959eaa550f4e..4b0eb4627ba0 100644
--- a/drivers/media/platform/qcom/venus/core.h
+++ b/drivers/media/platform/qcom/venus/core.h
@@ -26,10 +26,22 @@ struct reg_val {
u32 value;
};

+struct bw_tbl {
+ u32 mbs_per_sec;
+ u32 avg;
+ u32 peak;
+ u32 avg_10bit;
+ u32 peak_10bit;
+};
+
struct venus_resources {
u64 dma_mask;
const struct freq_tbl *freq_tbl;
unsigned int freq_tbl_size;
+ const struct bw_tbl *bw_tbl_enc;
+ unsigned int bw_tbl_enc_size;
+ const struct bw_tbl *bw_tbl_dec;
+ unsigned int bw_tbl_dec_size;
const struct reg_val *reg_tbl;
unsigned int reg_tbl_size;
const char * const clks[VIDC_CLKS_NUM_MAX];
@@ -114,6 +126,8 @@ struct venus_core {
struct clk *core1_clk;
struct clk *core0_bus_clk;
struct clk *core1_bus_clk;
+ struct icc_path *video_path;
+ struct icc_path *cpucfg_path;
struct video_device *vdev_dec;
struct video_device *vdev_enc;
struct v4l2_device v4l2_dev;
diff --git a/drivers/media/platform/qcom/venus/helpers.c b/drivers/media/platform/qcom/venus/helpers.c
index 1ad96c25ab09..f18458921f5d 100644
--- a/drivers/media/platform/qcom/venus/helpers.c
+++ b/drivers/media/platform/qcom/venus/helpers.c
@@ -5,6 +5,7 @@
*/
#include <linux/clk.h>
#include <linux/iopoll.h>
+#include <linux/interconnect.h>
#include <linux/list.h>
#include <linux/mutex.h>
#include <linux/pm_runtime.h>
@@ -388,6 +389,65 @@ static u32 load_per_type(struct venus_core *core, u32 session_type)
return mbs_per_sec;
}

+static void mbs_to_bw(struct venus_inst *inst, u32 mbs, u32 *avg, u32 *peak)
+{
+ const struct venus_resources *res = inst->core->res;
+ const struct bw_tbl *bw_tbl;
+ unsigned int num_rows, i;
+
+ *avg = 0;
+ *peak = 0;
+
+ if (mbs == 0)
+ return;
+
+ if (inst->session_type == VIDC_SESSION_TYPE_ENC) {
+ num_rows = res->bw_tbl_enc_size;
+ bw_tbl = res->bw_tbl_enc;
+ } else if (inst->session_type == VIDC_SESSION_TYPE_DEC) {
+ num_rows = res->bw_tbl_dec_size;
+ bw_tbl = res->bw_tbl_dec;
+ } else {
+ return;
+ }
+
+ if (!bw_tbl || num_rows == 0)
+ return;
+
+ for (i = 0; i < num_rows; i++) {
+ if (mbs > bw_tbl[i].mbs_per_sec)
+ break;
+
+ if (inst->dpb_fmt & HFI_COLOR_FORMAT_10_BIT_BASE) {
+ *avg = bw_tbl[i].avg_10bit;
+ *peak = bw_tbl[i].peak_10bit;
+ } else {
+ *avg = bw_tbl[i].avg;
+ *peak = bw_tbl[i].peak;
+ }
+ }
+}
+
+static int load_scale_bw(struct venus_core *core)
+{
+ struct venus_inst *inst = NULL;
+ u32 mbs_per_sec, avg, peak, total_avg = 0, total_peak = 0;
+
+ mutex_lock(&core->lock);
+ list_for_each_entry(inst, &core->instances, list) {
+ mbs_per_sec = load_per_instance(inst);
+ mbs_to_bw(inst, mbs_per_sec, &avg, &peak);
+ total_avg += avg;
+ total_peak += peak;
+ }
+ mutex_unlock(&core->lock);
+
+ dev_dbg(core->dev, "total: avg_bw: %u, peak_bw: %u\n",
+ total_avg, total_peak);
+
+ return icc_set_bw(core->video_path, total_avg, total_peak);
+}
+
int venus_helper_load_scale_clocks(struct venus_core *core)
{
const struct freq_tbl *table = core->res->freq_tbl;
@@ -431,10 +491,15 @@ int venus_helper_load_scale_clocks(struct venus_core *core)
if (ret)
goto err;

+ ret = load_scale_bw(core);
+ if (ret)
+ goto err;
+
return 0;

err:
- dev_err(dev, "failed to set clock rate %lu (%d)\n", freq, ret);
+ dev_err(dev, "failed to set clock rate %lu or bandwidth (%d)\n",
+ freq, ret);
return ret;
}
EXPORT_SYMBOL_GPL(venus_helper_load_scale_clocks);
--
2.17.1
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