Remove the requirement of a VDEC_SYS reg iospace. To achieve that, rely
on the "active" clock being passed through the DT, and read its status
during IRQ handling to check whether the HW is active.
The old behavior is still present when reg-names aren't supplied, as to
keep backward compatibility.
Signed-off-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
---
(no changes since v1)
.../mediatek/vcodec/mtk_vcodec_dec_drv.c | 59 +++++++++++++++----
.../mediatek/vcodec/mtk_vcodec_dec_hw.c | 20 +++++--
.../mediatek/vcodec/mtk_vcodec_dec_pm.c | 12 +++-
.../platform/mediatek/vcodec/mtk_vcodec_drv.h | 1 +
4 files changed, 74 insertions(+), 18 deletions(-)
diff --git a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_drv.c b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_drv.c
index 9c652beb3f19..8038472fb67b 100644
--- a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_drv.c
+++ b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_drv.c
@@ -16,6 +16,7 @@
#include <media/v4l2-mem2mem.h>
#include <media/videobuf2-dma-contig.h>
#include <media/v4l2-device.h>
+#include <linux/clk-provider.h>
#include "mtk_vcodec_drv.h"
#include "mtk_vcodec_dec.h"
@@ -38,22 +39,29 @@ static int mtk_vcodec_get_hw_count(struct mtk_vcodec_dev *dev)
}
}
+static bool mtk_vcodec_is_hw_active(struct mtk_vcodec_dev *dev)
+{
+ u32 cg_status = 0;
+
+ if (!dev->reg_base[VDEC_SYS])
+ return __clk_is_enabled(dev->pm.vdec_active_clk);
+
+ cg_status = readl(dev->reg_base[VDEC_SYS]);
+ return (cg_status & VDEC_HW_ACTIVE) == 0;
+}
+
static irqreturn_t mtk_vcodec_dec_irq_handler(int irq, void *priv)
{
struct mtk_vcodec_dev *dev = priv;
struct mtk_vcodec_ctx *ctx;
- u32 cg_status = 0;
unsigned int dec_done_status = 0;
void __iomem *vdec_misc_addr = dev->reg_base[VDEC_MISC] +
VDEC_IRQ_CFG_REG;
ctx = mtk_vcodec_get_curr_ctx(dev, MTK_VDEC_CORE);
- /* check if HW active or not */
- cg_status = readl(dev->reg_base[0]);
- if ((cg_status & VDEC_HW_ACTIVE) != 0) {
- mtk_v4l2_err("DEC ISR, VDEC active is not 0x0 (0x%08x)",
- cg_status);
+ if (!mtk_vcodec_is_hw_active(dev)) {
+ mtk_v4l2_err("DEC ISR, VDEC active is not 0x0");
return IRQ_HANDLED;
}
@@ -82,6 +90,25 @@ static int mtk_vcodec_get_reg_bases(struct mtk_vcodec_dev *dev)
{
struct platform_device *pdev = dev->plat_dev;
int reg_num, i;
+ struct resource *res;
+ bool no_vdecsys_reg = false;
+ static const char * const mtk_dec_reg_names[] = {
+ "misc",
+ "ld",
+ "top",
+ "cm",
+ "ad",
+ "av",
+ "pp",
+ "hwd",
+ "hwq",
+ "hwb",
+ "hwg"
+ };
+
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "misc");
+ if (res)
+ no_vdecsys_reg = true;
/* Sizeof(u32) * 4 bytes for each register base. */
reg_num = of_property_count_elems_of_size(pdev->dev.of_node, "reg",
@@ -91,12 +118,22 @@ static int mtk_vcodec_get_reg_bases(struct mtk_vcodec_dev *dev)
return -EINVAL;
}
- for (i = 0; i < reg_num; i++) {
- dev->reg_base[i] = devm_platform_ioremap_resource(pdev, i);
- if (IS_ERR(dev->reg_base[i]))
- return PTR_ERR(dev->reg_base[i]);
+ if (!no_vdecsys_reg) {
+ for (i = 0; i < reg_num; i++) {
+ dev->reg_base[i] = devm_platform_ioremap_resource(pdev, i);
+ if (IS_ERR(dev->reg_base[i]))
+ return PTR_ERR(dev->reg_base[i]);
- mtk_v4l2_debug(2, "reg[%d] base=%p", i, dev->reg_base[i]);
+ mtk_v4l2_debug(2, "reg[%d] base=%p", i, dev->reg_base[i]);
+ }
+ } else {
+ for (i = 0; i < reg_num; i++) {
+ dev->reg_base[i+1] = devm_platform_ioremap_resource_byname(pdev, mtk_dec_reg_names[i]);
+ if (IS_ERR(dev->reg_base[i+1]))
+ return PTR_ERR(dev->reg_base[i+1]);
+
+ mtk_v4l2_debug(2, "reg[%d] base=%p", i+1, dev->reg_base[i+1]);
+ }
}
return 0;
diff --git a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_hw.c b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_hw.c
index b753bf54ebd9..4e786821015d 100644
--- a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_hw.c
+++ b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_hw.c
@@ -11,6 +11,7 @@
#include <linux/of_device.h>
#include <linux/pm_runtime.h>
#include <linux/slab.h>
+#include <linux/clk-provider.h>
#include "mtk_vcodec_drv.h"
#include "mtk_vcodec_dec.h"
@@ -63,22 +64,29 @@ static int mtk_vdec_hw_prob_done(struct mtk_vcodec_dev *vdec_dev)
return 0;
}
+static bool mtk_vcodec_is_hw_active(struct mtk_vdec_hw_dev *dev)
+{
+ u32 cg_status;
+
+ if (!dev->reg_base[VDEC_HW_SYS])
+ return __clk_is_enabled(dev->pm.vdec_active_clk);
+
+ cg_status = readl(dev->reg_base[VDEC_HW_SYS]);
+ return (cg_status & VDEC_HW_ACTIVE) == 0;
+}
+
static irqreturn_t mtk_vdec_hw_irq_handler(int irq, void *priv)
{
struct mtk_vdec_hw_dev *dev = priv;
struct mtk_vcodec_ctx *ctx;
- u32 cg_status;
unsigned int dec_done_status;
void __iomem *vdec_misc_addr = dev->reg_base[VDEC_HW_MISC] +
VDEC_IRQ_CFG_REG;
ctx = mtk_vcodec_get_curr_ctx(dev->main_dev, dev->hw_idx);
- /* check if HW active or not */
- cg_status = readl(dev->reg_base[VDEC_HW_SYS]);
- if (cg_status & VDEC_HW_ACTIVE) {
- mtk_v4l2_err("vdec active is not 0x0 (0x%08x)",
- cg_status);
+ if (!mtk_vcodec_is_hw_active(dev)) {
+ mtk_v4l2_err("vdec active is not 0x0");
return IRQ_HANDLED;
}
diff --git a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_pm.c b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_pm.c
index 777d445999e9..53e621965950 100644
--- a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_pm.c
+++ b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_pm.c
@@ -51,6 +51,9 @@ int mtk_vcodec_init_dec_clk(struct platform_device *pdev, struct mtk_vcodec_pm *
clk_info->clk_name);
return PTR_ERR(clk_info->vcodec_clk);
}
+
+ if (strcmp(clk_info->clk_name, "active") == 0)
+ pm->vdec_active_clk = clk_info->vcodec_clk;
}
return 0;
@@ -84,6 +87,9 @@ static void mtk_vcodec_dec_clock_on(struct mtk_vcodec_pm *pm)
dec_clk = &pm->vdec_clk;
for (i = 0; i < dec_clk->clk_num; i++) {
+ if (strcmp(dec_clk->clk_info[i].clk_name, "active") == 0)
+ continue;
+
ret = clk_prepare_enable(dec_clk->clk_info[i].vcodec_clk);
if (ret) {
mtk_v4l2_err("clk_prepare_enable %d %s fail %d", i,
@@ -104,8 +110,12 @@ static void mtk_vcodec_dec_clock_off(struct mtk_vcodec_pm *pm)
int i;
dec_clk = &pm->vdec_clk;
- for (i = dec_clk->clk_num - 1; i >= 0; i--)
+ for (i = dec_clk->clk_num - 1; i >= 0; i--) {
+ if (strcmp(dec_clk->clk_info[i].clk_name, "active") == 0)
+ continue;
+
clk_disable_unprepare(dec_clk->clk_info[i].vcodec_clk);
+ }
}
static void mtk_vcodec_dec_enable_irq(struct mtk_vcodec_dev *vdec_dev, int hw_idx)
diff --git a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_drv.h b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_drv.h
index 9acab54fd650..180e74c69042 100644
--- a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_drv.h
+++ b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_drv.h
@@ -208,6 +208,7 @@ struct mtk_vcodec_pm {
struct mtk_vcodec_clk vdec_clk;
struct mtk_vcodec_clk venc_clk;
struct device *dev;
+ struct clk *vdec_active_clk;
};
/**
--
2.41.0
On Thu, Jun 8, 2023 at 4:57 AM Nícolas F. R. A. Prado
<nfraprado@collabora.com> wrote:
>
> Remove the requirement of a VDEC_SYS reg iospace. To achieve that, rely
> on the "active" clock being passed through the DT, and read its status
> during IRQ handling to check whether the HW is active.
>
> The old behavior is still present when reg-names aren't supplied, as to
> keep backward compatibility.
>
> Signed-off-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
> ---
>
> (no changes since v1)
>
> .../mediatek/vcodec/mtk_vcodec_dec_drv.c | 59 +++++++++++++++----
> .../mediatek/vcodec/mtk_vcodec_dec_hw.c | 20 +++++--
> .../mediatek/vcodec/mtk_vcodec_dec_pm.c | 12 +++-
> .../platform/mediatek/vcodec/mtk_vcodec_drv.h | 1 +
> 4 files changed, 74 insertions(+), 18 deletions(-)
>
> diff --git a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_drv.c b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_drv.c
> index 9c652beb3f19..8038472fb67b 100644
> --- a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_drv.c
> +++ b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_drv.c
> @@ -16,6 +16,7 @@
> #include <media/v4l2-mem2mem.h>
> #include <media/videobuf2-dma-contig.h>
> #include <media/v4l2-device.h>
> +#include <linux/clk-provider.h>
^^^^^^^^^^^^^^
This seems like a violation of the API separation.
> #include "mtk_vcodec_drv.h"
> #include "mtk_vcodec_dec.h"
> @@ -38,22 +39,29 @@ static int mtk_vcodec_get_hw_count(struct mtk_vcodec_dev *dev)
> }
> }
>
> +static bool mtk_vcodec_is_hw_active(struct mtk_vcodec_dev *dev)
> +{
> + u32 cg_status = 0;
> +
> + if (!dev->reg_base[VDEC_SYS])
> + return __clk_is_enabled(dev->pm.vdec_active_clk);
AFAIK this is still around for clk drivers that haven't moved to clk_hw.
It shouldn't be used by clock consumers. Would it be better to just pass
a syscon?
ChenYu
> +
> + cg_status = readl(dev->reg_base[VDEC_SYS]);
> + return (cg_status & VDEC_HW_ACTIVE) == 0;
> +}
> +
> static irqreturn_t mtk_vcodec_dec_irq_handler(int irq, void *priv)
> {
> struct mtk_vcodec_dev *dev = priv;
> struct mtk_vcodec_ctx *ctx;
> - u32 cg_status = 0;
> unsigned int dec_done_status = 0;
> void __iomem *vdec_misc_addr = dev->reg_base[VDEC_MISC] +
> VDEC_IRQ_CFG_REG;
>
> ctx = mtk_vcodec_get_curr_ctx(dev, MTK_VDEC_CORE);
>
> - /* check if HW active or not */
> - cg_status = readl(dev->reg_base[0]);
> - if ((cg_status & VDEC_HW_ACTIVE) != 0) {
> - mtk_v4l2_err("DEC ISR, VDEC active is not 0x0 (0x%08x)",
> - cg_status);
> + if (!mtk_vcodec_is_hw_active(dev)) {
> + mtk_v4l2_err("DEC ISR, VDEC active is not 0x0");
> return IRQ_HANDLED;
> }
>
> @@ -82,6 +90,25 @@ static int mtk_vcodec_get_reg_bases(struct mtk_vcodec_dev *dev)
> {
> struct platform_device *pdev = dev->plat_dev;
> int reg_num, i;
> + struct resource *res;
> + bool no_vdecsys_reg = false;
> + static const char * const mtk_dec_reg_names[] = {
> + "misc",
> + "ld",
> + "top",
> + "cm",
> + "ad",
> + "av",
> + "pp",
> + "hwd",
> + "hwq",
> + "hwb",
> + "hwg"
> + };
> +
> + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "misc");
> + if (res)
> + no_vdecsys_reg = true;
>
> /* Sizeof(u32) * 4 bytes for each register base. */
> reg_num = of_property_count_elems_of_size(pdev->dev.of_node, "reg",
> @@ -91,12 +118,22 @@ static int mtk_vcodec_get_reg_bases(struct mtk_vcodec_dev *dev)
> return -EINVAL;
> }
>
> - for (i = 0; i < reg_num; i++) {
> - dev->reg_base[i] = devm_platform_ioremap_resource(pdev, i);
> - if (IS_ERR(dev->reg_base[i]))
> - return PTR_ERR(dev->reg_base[i]);
> + if (!no_vdecsys_reg) {
> + for (i = 0; i < reg_num; i++) {
> + dev->reg_base[i] = devm_platform_ioremap_resource(pdev, i);
> + if (IS_ERR(dev->reg_base[i]))
> + return PTR_ERR(dev->reg_base[i]);
>
> - mtk_v4l2_debug(2, "reg[%d] base=%p", i, dev->reg_base[i]);
> + mtk_v4l2_debug(2, "reg[%d] base=%p", i, dev->reg_base[i]);
> + }
> + } else {
> + for (i = 0; i < reg_num; i++) {
> + dev->reg_base[i+1] = devm_platform_ioremap_resource_byname(pdev, mtk_dec_reg_names[i]);
> + if (IS_ERR(dev->reg_base[i+1]))
> + return PTR_ERR(dev->reg_base[i+1]);
> +
> + mtk_v4l2_debug(2, "reg[%d] base=%p", i+1, dev->reg_base[i+1]);
> + }
> }
>
> return 0;
> diff --git a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_hw.c b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_hw.c
> index b753bf54ebd9..4e786821015d 100644
> --- a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_hw.c
> +++ b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_hw.c
> @@ -11,6 +11,7 @@
> #include <linux/of_device.h>
> #include <linux/pm_runtime.h>
> #include <linux/slab.h>
> +#include <linux/clk-provider.h>
>
> #include "mtk_vcodec_drv.h"
> #include "mtk_vcodec_dec.h"
> @@ -63,22 +64,29 @@ static int mtk_vdec_hw_prob_done(struct mtk_vcodec_dev *vdec_dev)
> return 0;
> }
>
> +static bool mtk_vcodec_is_hw_active(struct mtk_vdec_hw_dev *dev)
> +{
> + u32 cg_status;
> +
> + if (!dev->reg_base[VDEC_HW_SYS])
> + return __clk_is_enabled(dev->pm.vdec_active_clk);
> +
> + cg_status = readl(dev->reg_base[VDEC_HW_SYS]);
> + return (cg_status & VDEC_HW_ACTIVE) == 0;
> +}
> +
> static irqreturn_t mtk_vdec_hw_irq_handler(int irq, void *priv)
> {
> struct mtk_vdec_hw_dev *dev = priv;
> struct mtk_vcodec_ctx *ctx;
> - u32 cg_status;
> unsigned int dec_done_status;
> void __iomem *vdec_misc_addr = dev->reg_base[VDEC_HW_MISC] +
> VDEC_IRQ_CFG_REG;
>
> ctx = mtk_vcodec_get_curr_ctx(dev->main_dev, dev->hw_idx);
>
> - /* check if HW active or not */
> - cg_status = readl(dev->reg_base[VDEC_HW_SYS]);
> - if (cg_status & VDEC_HW_ACTIVE) {
> - mtk_v4l2_err("vdec active is not 0x0 (0x%08x)",
> - cg_status);
> + if (!mtk_vcodec_is_hw_active(dev)) {
> + mtk_v4l2_err("vdec active is not 0x0");
> return IRQ_HANDLED;
> }
>
> diff --git a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_pm.c b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_pm.c
> index 777d445999e9..53e621965950 100644
> --- a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_pm.c
> +++ b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_pm.c
> @@ -51,6 +51,9 @@ int mtk_vcodec_init_dec_clk(struct platform_device *pdev, struct mtk_vcodec_pm *
> clk_info->clk_name);
> return PTR_ERR(clk_info->vcodec_clk);
> }
> +
> + if (strcmp(clk_info->clk_name, "active") == 0)
> + pm->vdec_active_clk = clk_info->vcodec_clk;
> }
>
> return 0;
> @@ -84,6 +87,9 @@ static void mtk_vcodec_dec_clock_on(struct mtk_vcodec_pm *pm)
>
> dec_clk = &pm->vdec_clk;
> for (i = 0; i < dec_clk->clk_num; i++) {
> + if (strcmp(dec_clk->clk_info[i].clk_name, "active") == 0)
> + continue;
> +
> ret = clk_prepare_enable(dec_clk->clk_info[i].vcodec_clk);
> if (ret) {
> mtk_v4l2_err("clk_prepare_enable %d %s fail %d", i,
> @@ -104,8 +110,12 @@ static void mtk_vcodec_dec_clock_off(struct mtk_vcodec_pm *pm)
> int i;
>
> dec_clk = &pm->vdec_clk;
> - for (i = dec_clk->clk_num - 1; i >= 0; i--)
> + for (i = dec_clk->clk_num - 1; i >= 0; i--) {
> + if (strcmp(dec_clk->clk_info[i].clk_name, "active") == 0)
> + continue;
> +
> clk_disable_unprepare(dec_clk->clk_info[i].vcodec_clk);
> + }
> }
>
> static void mtk_vcodec_dec_enable_irq(struct mtk_vcodec_dev *vdec_dev, int hw_idx)
> diff --git a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_drv.h b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_drv.h
> index 9acab54fd650..180e74c69042 100644
> --- a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_drv.h
> +++ b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_drv.h
> @@ -208,6 +208,7 @@ struct mtk_vcodec_pm {
> struct mtk_vcodec_clk vdec_clk;
> struct mtk_vcodec_clk venc_clk;
> struct device *dev;
> + struct clk *vdec_active_clk;
> };
>
> /**
> --
> 2.41.0
>
>
Il 08/06/23 10:12, Chen-Yu Tsai ha scritto:
> On Thu, Jun 8, 2023 at 4:57 AM Nícolas F. R. A. Prado
> <nfraprado@collabora.com> wrote:
>>
>> Remove the requirement of a VDEC_SYS reg iospace. To achieve that, rely
>> on the "active" clock being passed through the DT, and read its status
>> during IRQ handling to check whether the HW is active.
>>
>> The old behavior is still present when reg-names aren't supplied, as to
>> keep backward compatibility.
>>
>> Signed-off-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
>> ---
>>
>> (no changes since v1)
>>
>> .../mediatek/vcodec/mtk_vcodec_dec_drv.c | 59 +++++++++++++++----
>> .../mediatek/vcodec/mtk_vcodec_dec_hw.c | 20 +++++--
>> .../mediatek/vcodec/mtk_vcodec_dec_pm.c | 12 +++-
>> .../platform/mediatek/vcodec/mtk_vcodec_drv.h | 1 +
>> 4 files changed, 74 insertions(+), 18 deletions(-)
>>
>> diff --git a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_drv.c b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_drv.c
>> index 9c652beb3f19..8038472fb67b 100644
>> --- a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_drv.c
>> +++ b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_drv.c
>> @@ -16,6 +16,7 @@
>> #include <media/v4l2-mem2mem.h>
>> #include <media/videobuf2-dma-contig.h>
>> #include <media/v4l2-device.h>
>> +#include <linux/clk-provider.h>
>
> ^^^^^^^^^^^^^^
>
> This seems like a violation of the API separation.
>
>> #include "mtk_vcodec_drv.h"
>> #include "mtk_vcodec_dec.h"
>> @@ -38,22 +39,29 @@ static int mtk_vcodec_get_hw_count(struct mtk_vcodec_dev *dev)
>> }
>> }
>>
>> +static bool mtk_vcodec_is_hw_active(struct mtk_vcodec_dev *dev)
>> +{
>> + u32 cg_status = 0;
>> +
>> + if (!dev->reg_base[VDEC_SYS])
>> + return __clk_is_enabled(dev->pm.vdec_active_clk);
>
> AFAIK this is still around for clk drivers that haven't moved to clk_hw.
> It shouldn't be used by clock consumers. Would it be better to just pass
> a syscon?
>
This is a legit usage of __clk_is_enabled().... because that's what we're really
doing here, we're checking if a clock got enabled by the underlying MCU (as that
clock goes up after the VDEC boots).
If this is *not* acceptable as it is, we will have to add a clock API call to
check if a clock is enabled... but it didn't seem worth doing since we don't
expect anyone else to have any legit usage of that, or at least, we don't know
about anyone else needing that...
As for the syscon, that's something that we've been discussing as well... the
thing is: we're really *really* checking if a clock is enabled, so we should
be using clock related calls... reading from a syscon means that we'd have to
perform a register read (of.. again.. a clock) outside of the clock framework
which, in my opinion, wouldn't be clean; I'd expect that to become a bit messy
in the future too, should more MediaTek SoCs (I think MT8192/95 are already in
the list, Nicolas please correct me if I'm wrong here) need the same thing, as
we'd be adding more definitions around.
Cheers,
Angelo
Il 07/06/23 22:53, Nícolas F. R. A. Prado ha scritto: > Remove the requirement of a VDEC_SYS reg iospace. To achieve that, rely > on the "active" clock being passed through the DT, and read its status > during IRQ handling to check whether the HW is active. > > The old behavior is still present when reg-names aren't supplied, as to > keep backward compatibility. > > Signed-off-by: Nícolas F. R. A. Prado <nfraprado@collabora.com> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
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