Re: [PATCH] drm/bridge: dw-mipi-dsi: Find the possible DSI devices
Thanks for catching this Michael.
> > Working on linux-next-5.14-rc4 on px30-evb rockchip board. On top of this
> > patch for px30 dsi
> > I need to add:
> >
>
> I wrote the driver for evb px30 v11. I just need to clean up a bit.
> Anyway the video is correct.
> Using my patch. The display is not a module
>
> Module Size Used by
> bluetooth 438272 2
> ecdh_generic 16384 1 bluetooth
> ecc36864 1 ecdh_generic
> brcmfmac 249856 0
> crct10dif_ce 20480 1
> brcmutil 20480 1 brcmfmac
> dwmac_rk 28672 0
> stmmac_platform20480 1 dwmac_rk
> cfg80211 360448 1 brcmfmac
> rfkill 36864 3 bluetooth,cfg80211
> stmmac217088 2 stmmac_platform,dwmac_rk
> rockchip_saradc16384 0
> pcs_xpcs 24576 1 stmmac
> industrialio_triggered_buffer16384 1 rockchip_saradc
> rockchip_thermal 24576 0
> kfifo_buf 16384 1 industrialio_triggered_buffer
> rtc_rk808 16384 1
> goodix 24576 0
> snd_soc_rockchip_i2s16384 0
> snd_soc_rockchip_pcm16384 1 snd_soc_rockchip_i2s
> adc_keys 16384 0
> fuse 131072 1
> ipv6 446464 36
>
> Michael
Can you submit this patch separately and add a Fixes tag to it?
With the above fixed, the drm-misc related changes have my ack.
Acked-by: Robert Foss
>
> >
> > From a0e0344b4cb4df3d97fac0e27e0aa76a2a191b0e Mon Sep 17 00:00:00 2001
> > From: Michael Trimarchi
> > Date: Sun, 10 Oct 2021 23:56:20 +0200
> > Subject: [PATCH] drm: dw-mipi-dsi-rockchip: Avoid the attach before probe is
> > completed
> >
> > Signed-off-by: Michael Trimarchi
> > ---
> > drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c | 8 +++-
> > drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c | 12
> > include/drm/bridge/dw_mipi_dsi.h| 2 +-
> > 3 files changed, 16 insertions(+), 6 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c
> > b/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c
> > index 45f4515dda00..a5535f183af3 100644
> > --- a/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c
> > +++ b/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c
> > @@ -362,8 +362,14 @@ static int dw_mipi_dsi_host_attach(struct
> > mipi_dsi_host *host,
> > dsi->device_found = true;
> > }
> >
> > + /*
> > +* NOTE: the dsi registration is implemented in
> > +* platform driver, that to say dsi would be exist after
> > +* probe is terminated. The call is done before the end of probe
> > +* so we need to pass the dsi to the platform driver.
> > +*/
> > if (pdata->host_ops && pdata->host_ops->attach) {
> > - ret = pdata->host_ops->attach(pdata->priv_data, device);
> > + ret = pdata->host_ops->attach(pdata->priv_data, device,
> > dsi);
> > if (ret < 0)
> > return ret;
> > }
> > diff --git a/drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c
> > b/drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c
> > index ec7729d18cb8..cf7c9cf11c9e 100644
> > --- a/drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c
> > +++ b/drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c
> > @@ -972,12 +972,15 @@ static const struct component_ops
> > dw_mipi_dsi_rockchip_ops = {
> > };
> >
> > static int dw_mipi_dsi_rockchip_host_attach(void *priv_data,
> > - struct mipi_dsi_device *device)
> > + struct mipi_dsi_device *device,
> > + struct dw_mipi_dsi *dmd)
> > {
> > struct dw_mipi_dsi_rockchip *dsi = priv_data;
> > struct device *second;
> > int ret;
> >
> > + dsi->dmd = dmd;
> > +
> > ret = component_add(dsi->dev, _mipi_dsi_rockchip_ops);
> > if (ret) {
> > DRM_DEV_ERROR(dsi->dev, "Failed to register component:
> > %d\n",
> > @@ -1027,6 +1030,7 @@ static int dw_mipi_dsi_rockchip_probe(struct
> > platform_device *pdev)
> > struct device_node *np = dev->of_node;
> > struct dw_mipi_dsi_rockchip *dsi;
> > struct resource *res;
> > + struct dw_mipi_dsi *dmd;
> > const struct rockchip_dw_dsi_chip_data *cdata =
> > of_device_get_match_data(dev);
> > int ret, i;
> > @@ -1115,9 +1119,9 @@ static int dw_mipi_dsi_rockchip_probe(struct
> > platform_device *pdev)
> > dsi->pdata.priv_data = dsi;
> > platform_set_drvdata(pdev, dsi);
> >
> > - dsi->dmd = dw_mipi_dsi_probe(pdev, >pdata);
> > - if (IS_ERR(dsi->dmd)) {
> > - ret = PTR_ERR(dsi->dmd);
> > + dmd = dw_mipi_dsi_probe(pdev, >pdata);
> > + if (IS_ERR(dmd)) {
> > + ret = PTR_ERR(dmd);
> > if (ret !=
Re: [PATCH] drm/bridge: dw-mipi-dsi: Find the possible DSI devices
On Mon, Oct 11, 2021 at 8:43 AM Michael Trimarchi
wrote:
>
> Hi
>
> On Sun, Jul 04, 2021 at 07:33:09PM +0530, Jagan Teki wrote:
> > Finding panel_or_bridge might vary based on associated
> > DSI devices like DSI panel, bridge, and I2C based DSI
> > bridge.
> >
> > 1. DSI panels and bridges will invoke the host attach
> >from probe in order to find the panel_or_bridge.
> >
> >chipone_probe()
> >dw_mipi_dsi_host_attach().start
> > dw_mipi_dsi_panel_or_bridge()
> > ...found the panel_or_bridge...
> >
> >ltdc_encoder_init().start
> >dw_mipi_dsi_bridge_attach().start
> > dw_mipi_dsi_host_attach().start
> > chipone_attach(). start
> >
> > chipone_attach(). done
> > dw_mipi_dsi_host_attach().done
> >dw_mipi_dsi_bridge_attach(). done
> >ltdc_encoder_init().done
> >
> > 2. I2C based DSI bridge will invoke the drm_bridge_attach
> >from bridge attach in order to find the panel_or_bridge.
> >
> >ltdc_encoder_init().start
> >dw_mipi_dsi_bridge_attach().start
> > dw_mipi_dsi_panel_or_bridge()
> > ...found the panel_or_bridge...
> > dw_mipi_dsi_host_attach().start
> > sn65dsi83_attach(). start
> >
> > sn65dsi83_attach(). done
> > dw_mipi_dsi_host_attach().done
> >dw_mipi_dsi_bridge_attach(). done
> >ltdc_encoder_init().done
> >
> > So, invoke the panel_or_bridge from host attach and
> > bridge attach in order to find all possible DSI devices.
> >
>
> Working on linux-next-5.14-rc4 on px30-evb rockchip board. On top of this
> patch for px30 dsi
> I need to add:
>
I wrote the driver for evb px30 v11. I just need to clean up a bit.
Anyway the video is correct.
Using my patch. The display is not a module
Module Size Used by
bluetooth 438272 2
ecdh_generic 16384 1 bluetooth
ecc36864 1 ecdh_generic
brcmfmac 249856 0
crct10dif_ce 20480 1
brcmutil 20480 1 brcmfmac
dwmac_rk 28672 0
stmmac_platform20480 1 dwmac_rk
cfg80211 360448 1 brcmfmac
rfkill 36864 3 bluetooth,cfg80211
stmmac217088 2 stmmac_platform,dwmac_rk
rockchip_saradc16384 0
pcs_xpcs 24576 1 stmmac
industrialio_triggered_buffer16384 1 rockchip_saradc
rockchip_thermal 24576 0
kfifo_buf 16384 1 industrialio_triggered_buffer
rtc_rk808 16384 1
goodix 24576 0
snd_soc_rockchip_i2s16384 0
snd_soc_rockchip_pcm16384 1 snd_soc_rockchip_i2s
adc_keys 16384 0
fuse 131072 1
ipv6 446464 36
Michael
>
> From a0e0344b4cb4df3d97fac0e27e0aa76a2a191b0e Mon Sep 17 00:00:00 2001
> From: Michael Trimarchi
> Date: Sun, 10 Oct 2021 23:56:20 +0200
> Subject: [PATCH] drm: dw-mipi-dsi-rockchip: Avoid the attach before probe is
> completed
>
> Signed-off-by: Michael Trimarchi
> ---
> drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c | 8 +++-
> drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c | 12
> include/drm/bridge/dw_mipi_dsi.h| 2 +-
> 3 files changed, 16 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c
> b/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c
> index 45f4515dda00..a5535f183af3 100644
> --- a/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c
> +++ b/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c
> @@ -362,8 +362,14 @@ static int dw_mipi_dsi_host_attach(struct mipi_dsi_host
> *host,
> dsi->device_found = true;
> }
>
> + /*
> +* NOTE: the dsi registration is implemented in
> +* platform driver, that to say dsi would be exist after
> +* probe is terminated. The call is done before the end of probe
> +* so we need to pass the dsi to the platform driver.
> +*/
> if (pdata->host_ops && pdata->host_ops->attach) {
> - ret = pdata->host_ops->attach(pdata->priv_data, device);
> + ret = pdata->host_ops->attach(pdata->priv_data, device, dsi);
> if (ret < 0)
> return ret;
> }
> diff --git a/drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c
> b/drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c
> index ec7729d18cb8..cf7c9cf11c9e 100644
> --- a/drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c
> +++ b/drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c
> @@ -972,12 +972,15 @@ static const struct component_ops
> dw_mipi_dsi_rockchip_ops = {
> };
>
> static int dw_mipi_dsi_rockchip_host_attach(void *priv_data,
> - struct mipi_dsi_device *device)
> + struct mipi_dsi_device *device,
> +
Re: [PATCH] drm/bridge: dw-mipi-dsi: Find the possible DSI devices
Hi
On Sun, Jul 04, 2021 at 07:33:09PM +0530, Jagan Teki wrote:
> Finding panel_or_bridge might vary based on associated
> DSI devices like DSI panel, bridge, and I2C based DSI
> bridge.
>
> 1. DSI panels and bridges will invoke the host attach
>from probe in order to find the panel_or_bridge.
>
>chipone_probe()
>dw_mipi_dsi_host_attach().start
> dw_mipi_dsi_panel_or_bridge()
> ...found the panel_or_bridge...
>
>ltdc_encoder_init().start
>dw_mipi_dsi_bridge_attach().start
> dw_mipi_dsi_host_attach().start
> chipone_attach(). start
>
> chipone_attach(). done
> dw_mipi_dsi_host_attach().done
>dw_mipi_dsi_bridge_attach(). done
>ltdc_encoder_init().done
>
> 2. I2C based DSI bridge will invoke the drm_bridge_attach
>from bridge attach in order to find the panel_or_bridge.
>
>ltdc_encoder_init().start
>dw_mipi_dsi_bridge_attach().start
> dw_mipi_dsi_panel_or_bridge()
> ...found the panel_or_bridge...
> dw_mipi_dsi_host_attach().start
> sn65dsi83_attach(). start
>
> sn65dsi83_attach(). done
> dw_mipi_dsi_host_attach().done
>dw_mipi_dsi_bridge_attach(). done
>ltdc_encoder_init().done
>
> So, invoke the panel_or_bridge from host attach and
> bridge attach in order to find all possible DSI devices.
>
Working on linux-next-5.14-rc4 on px30-evb rockchip board. On top of this patch
for px30 dsi
I need to add:
>From a0e0344b4cb4df3d97fac0e27e0aa76a2a191b0e Mon Sep 17 00:00:00 2001
From: Michael Trimarchi
Date: Sun, 10 Oct 2021 23:56:20 +0200
Subject: [PATCH] drm: dw-mipi-dsi-rockchip: Avoid the attach before probe is
completed
Signed-off-by: Michael Trimarchi
---
drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c | 8 +++-
drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c | 12
include/drm/bridge/dw_mipi_dsi.h| 2 +-
3 files changed, 16 insertions(+), 6 deletions(-)
diff --git a/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c
b/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c
index 45f4515dda00..a5535f183af3 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c
@@ -362,8 +362,14 @@ static int dw_mipi_dsi_host_attach(struct mipi_dsi_host
*host,
dsi->device_found = true;
}
+ /*
+* NOTE: the dsi registration is implemented in
+* platform driver, that to say dsi would be exist after
+* probe is terminated. The call is done before the end of probe
+* so we need to pass the dsi to the platform driver.
+*/
if (pdata->host_ops && pdata->host_ops->attach) {
- ret = pdata->host_ops->attach(pdata->priv_data, device);
+ ret = pdata->host_ops->attach(pdata->priv_data, device, dsi);
if (ret < 0)
return ret;
}
diff --git a/drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c
b/drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c
index ec7729d18cb8..cf7c9cf11c9e 100644
--- a/drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c
+++ b/drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c
@@ -972,12 +972,15 @@ static const struct component_ops
dw_mipi_dsi_rockchip_ops = {
};
static int dw_mipi_dsi_rockchip_host_attach(void *priv_data,
- struct mipi_dsi_device *device)
+ struct mipi_dsi_device *device,
+ struct dw_mipi_dsi *dmd)
{
struct dw_mipi_dsi_rockchip *dsi = priv_data;
struct device *second;
int ret;
+ dsi->dmd = dmd;
+
ret = component_add(dsi->dev, _mipi_dsi_rockchip_ops);
if (ret) {
DRM_DEV_ERROR(dsi->dev, "Failed to register component: %d\n",
@@ -1027,6 +1030,7 @@ static int dw_mipi_dsi_rockchip_probe(struct
platform_device *pdev)
struct device_node *np = dev->of_node;
struct dw_mipi_dsi_rockchip *dsi;
struct resource *res;
+ struct dw_mipi_dsi *dmd;
const struct rockchip_dw_dsi_chip_data *cdata =
of_device_get_match_data(dev);
int ret, i;
@@ -1115,9 +1119,9 @@ static int dw_mipi_dsi_rockchip_probe(struct
platform_device *pdev)
dsi->pdata.priv_data = dsi;
platform_set_drvdata(pdev, dsi);
- dsi->dmd = dw_mipi_dsi_probe(pdev, >pdata);
- if (IS_ERR(dsi->dmd)) {
- ret = PTR_ERR(dsi->dmd);
+ dmd = dw_mipi_dsi_probe(pdev, >pdata);
+ if (IS_ERR(dmd)) {
+ ret = PTR_ERR(dmd);
if (ret != -EPROBE_DEFER)
DRM_DEV_ERROR(dev,
"Failed to probe dw_mipi_dsi: %d\n", ret);
diff --git a/include/drm/bridge/dw_mipi_dsi.h
Re: [PATCH] drm/bridge: dw-mipi-dsi: Find the possible DSI devices
Pushed to drm-misc-next
Re: [PATCH] drm/bridge: dw-mipi-dsi: Find the possible DSI devices
Am Sonntag, 4. Juli 2021, 16:03:09 CEST schrieb Jagan Teki:
> Finding panel_or_bridge might vary based on associated
> DSI devices like DSI panel, bridge, and I2C based DSI
> bridge.
>
> 1. DSI panels and bridges will invoke the host attach
>from probe in order to find the panel_or_bridge.
>
>chipone_probe()
>dw_mipi_dsi_host_attach().start
> dw_mipi_dsi_panel_or_bridge()
> ...found the panel_or_bridge...
>
>ltdc_encoder_init().start
>dw_mipi_dsi_bridge_attach().start
> dw_mipi_dsi_host_attach().start
> chipone_attach(). start
>
> chipone_attach(). done
> dw_mipi_dsi_host_attach().done
>dw_mipi_dsi_bridge_attach(). done
>ltdc_encoder_init().done
>
> 2. I2C based DSI bridge will invoke the drm_bridge_attach
>from bridge attach in order to find the panel_or_bridge.
>
>ltdc_encoder_init().start
>dw_mipi_dsi_bridge_attach().start
> dw_mipi_dsi_panel_or_bridge()
> ...found the panel_or_bridge...
> dw_mipi_dsi_host_attach().start
> sn65dsi83_attach(). start
>
> sn65dsi83_attach(). done
> dw_mipi_dsi_host_attach().done
>dw_mipi_dsi_bridge_attach(). done
>ltdc_encoder_init().done
>
> So, invoke the panel_or_bridge from host attach and
> bridge attach in order to find all possible DSI devices.
>
> Signed-off-by: Jagan Teki
On px30 with a dsi-display and rk3399 with my csi-phy patches
hooking into the rockchip-dsi
Tested-by: Heiko Stuebner
> ---
> drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c | 58 ++-
> 1 file changed, 43 insertions(+), 15 deletions(-)
>
> diff --git a/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c
> b/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c
> index 6b268f9445b3..45f4515dda00 100644
> --- a/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c
> +++ b/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c
> @@ -246,6 +246,7 @@ struct dw_mipi_dsi {
>
> struct clk *pclk;
>
> + bool device_found;
> unsigned int lane_mbps; /* per lane */
> u32 channel;
> u32 lanes;
> @@ -309,13 +310,37 @@ static inline u32 dsi_read(struct dw_mipi_dsi *dsi, u32
> reg)
> return readl(dsi->base + reg);
> }
>
> +static int dw_mipi_dsi_panel_or_bridge(struct dw_mipi_dsi *dsi,
> +struct device_node *node)
> +{
> + struct drm_bridge *bridge;
> + struct drm_panel *panel;
> + int ret;
> +
> + ret = drm_of_find_panel_or_bridge(node, 1, 0, , );
> + if (ret)
> + return ret;
> +
> + if (panel) {
> + bridge = drm_panel_bridge_add_typed(panel,
> + DRM_MODE_CONNECTOR_DSI);
> + if (IS_ERR(bridge))
> + return PTR_ERR(bridge);
> + }
> +
> + dsi->panel_bridge = bridge;
> +
> + if (!dsi->panel_bridge)
> + return -EPROBE_DEFER;
> +
> + return 0;
> +}
> +
> static int dw_mipi_dsi_host_attach(struct mipi_dsi_host *host,
> struct mipi_dsi_device *device)
> {
> struct dw_mipi_dsi *dsi = host_to_dsi(host);
> const struct dw_mipi_dsi_plat_data *pdata = dsi->plat_data;
> - struct drm_bridge *bridge;
> - struct drm_panel *panel;
> int ret;
>
> if (device->lanes > dsi->plat_data->max_data_lanes) {
> @@ -329,22 +354,14 @@ static int dw_mipi_dsi_host_attach(struct mipi_dsi_host
> *host,
> dsi->format = device->format;
> dsi->mode_flags = device->mode_flags;
>
> - ret = drm_of_find_panel_or_bridge(host->dev->of_node, 1, 0,
> - , );
> - if (ret)
> - return ret;
> + if (!dsi->device_found) {
> + ret = dw_mipi_dsi_panel_or_bridge(dsi, host->dev->of_node);
> + if (ret)
> + return ret;
>
> - if (panel) {
> - bridge = drm_panel_bridge_add_typed(panel,
> - DRM_MODE_CONNECTOR_DSI);
> - if (IS_ERR(bridge))
> - return PTR_ERR(bridge);
> + dsi->device_found = true;
> }
>
> - dsi->panel_bridge = bridge;
> -
> - drm_bridge_add(>bridge);
> -
> if (pdata->host_ops && pdata->host_ops->attach) {
> ret = pdata->host_ops->attach(pdata->priv_data, device);
> if (ret < 0)
> @@ -999,6 +1016,16 @@ static int dw_mipi_dsi_bridge_attach(struct drm_bridge
> *bridge,
> /* Set the encoder type as caller does not know it */
> bridge->encoder->encoder_type = DRM_MODE_ENCODER_DSI;
>
> + if (!dsi->device_found) {
> + int ret;
> +
> + ret = dw_mipi_dsi_panel_or_bridge(dsi, dsi->dev->of_node);
> + if (ret)
> + return ret;
> +
> +
Re: [PATCH] drm/bridge: dw-mipi-dsi: Find the possible DSI devices
Reviewed-by: Robert Foss
Re: [PATCH] drm/bridge: dw-mipi-dsi: Find the possible DSI devices
Hi Jagan,
Sorry for the delay. Thanks for the patch.
Tested-by: Yannick Fertre
On 7/4/21 4:03 PM, Jagan Teki wrote:
Finding panel_or_bridge might vary based on associated
DSI devices like DSI panel, bridge, and I2C based DSI
bridge.
1. DSI panels and bridges will invoke the host attach
from probe in order to find the panel_or_bridge.
chipone_probe()
dw_mipi_dsi_host_attach().start
dw_mipi_dsi_panel_or_bridge()
...found the panel_or_bridge...
ltdc_encoder_init().start
dw_mipi_dsi_bridge_attach().start
dw_mipi_dsi_host_attach().start
chipone_attach(). start
chipone_attach(). done
dw_mipi_dsi_host_attach().done
dw_mipi_dsi_bridge_attach(). done
ltdc_encoder_init().done
2. I2C based DSI bridge will invoke the drm_bridge_attach
from bridge attach in order to find the panel_or_bridge.
ltdc_encoder_init().start
dw_mipi_dsi_bridge_attach().start
dw_mipi_dsi_panel_or_bridge()
...found the panel_or_bridge...
dw_mipi_dsi_host_attach().start
sn65dsi83_attach(). start
sn65dsi83_attach(). done
dw_mipi_dsi_host_attach().done
dw_mipi_dsi_bridge_attach(). done
ltdc_encoder_init().done
So, invoke the panel_or_bridge from host attach and
bridge attach in order to find all possible DSI devices.
Signed-off-by: Jagan Teki
---
drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c | 58 ++-
1 file changed, 43 insertions(+), 15 deletions(-)
diff --git a/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c
b/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c
index 6b268f9445b3..45f4515dda00 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c
@@ -246,6 +246,7 @@ struct dw_mipi_dsi {
struct clk *pclk;
+ bool device_found;
unsigned int lane_mbps; /* per lane */
u32 channel;
u32 lanes;
@@ -309,13 +310,37 @@ static inline u32 dsi_read(struct dw_mipi_dsi *dsi, u32
reg)
return readl(dsi->base + reg);
}
+static int dw_mipi_dsi_panel_or_bridge(struct dw_mipi_dsi *dsi,
+ struct device_node *node)
+{
+ struct drm_bridge *bridge;
+ struct drm_panel *panel;
+ int ret;
+
+ ret = drm_of_find_panel_or_bridge(node, 1, 0, , );
+ if (ret)
+ return ret;
+
+ if (panel) {
+ bridge = drm_panel_bridge_add_typed(panel,
+ DRM_MODE_CONNECTOR_DSI);
+ if (IS_ERR(bridge))
+ return PTR_ERR(bridge);
+ }
+
+ dsi->panel_bridge = bridge;
+
+ if (!dsi->panel_bridge)
+ return -EPROBE_DEFER;
+
+ return 0;
+}
+
static int dw_mipi_dsi_host_attach(struct mipi_dsi_host *host,
struct mipi_dsi_device *device)
{
struct dw_mipi_dsi *dsi = host_to_dsi(host);
const struct dw_mipi_dsi_plat_data *pdata = dsi->plat_data;
- struct drm_bridge *bridge;
- struct drm_panel *panel;
int ret;
if (device->lanes > dsi->plat_data->max_data_lanes) {
@@ -329,22 +354,14 @@ static int dw_mipi_dsi_host_attach(struct mipi_dsi_host
*host,
dsi->format = device->format;
dsi->mode_flags = device->mode_flags;
- ret = drm_of_find_panel_or_bridge(host->dev->of_node, 1, 0,
- , );
- if (ret)
- return ret;
+ if (!dsi->device_found) {
+ ret = dw_mipi_dsi_panel_or_bridge(dsi, host->dev->of_node);
+ if (ret)
+ return ret;
- if (panel) {
- bridge = drm_panel_bridge_add_typed(panel,
- DRM_MODE_CONNECTOR_DSI);
- if (IS_ERR(bridge))
- return PTR_ERR(bridge);
+ dsi->device_found = true;
}
- dsi->panel_bridge = bridge;
-
- drm_bridge_add(>bridge);
-
if (pdata->host_ops && pdata->host_ops->attach) {
ret = pdata->host_ops->attach(pdata->priv_data, device);
if (ret < 0)
@@ -999,6 +1016,16 @@ static int dw_mipi_dsi_bridge_attach(struct drm_bridge
*bridge,
/* Set the encoder type as caller does not know it */
bridge->encoder->encoder_type = DRM_MODE_ENCODER_DSI;
+ if (!dsi->device_found) {
+ int ret;
+
+ ret = dw_mipi_dsi_panel_or_bridge(dsi, dsi->dev->of_node);
+ if (ret)
+ return ret;
+
+ dsi->device_found = true;
+ }
+
/* Attach the panel-bridge to the dsi bridge */
return drm_bridge_attach(bridge->encoder, dsi->panel_bridge, bridge,
flags);
@@
[PATCH] drm/bridge: dw-mipi-dsi: Find the possible DSI devices
Finding panel_or_bridge might vary based on associated
DSI devices like DSI panel, bridge, and I2C based DSI
bridge.
1. DSI panels and bridges will invoke the host attach
from probe in order to find the panel_or_bridge.
chipone_probe()
dw_mipi_dsi_host_attach().start
dw_mipi_dsi_panel_or_bridge()
...found the panel_or_bridge...
ltdc_encoder_init().start
dw_mipi_dsi_bridge_attach().start
dw_mipi_dsi_host_attach().start
chipone_attach(). start
chipone_attach(). done
dw_mipi_dsi_host_attach().done
dw_mipi_dsi_bridge_attach(). done
ltdc_encoder_init().done
2. I2C based DSI bridge will invoke the drm_bridge_attach
from bridge attach in order to find the panel_or_bridge.
ltdc_encoder_init().start
dw_mipi_dsi_bridge_attach().start
dw_mipi_dsi_panel_or_bridge()
...found the panel_or_bridge...
dw_mipi_dsi_host_attach().start
sn65dsi83_attach(). start
sn65dsi83_attach(). done
dw_mipi_dsi_host_attach().done
dw_mipi_dsi_bridge_attach(). done
ltdc_encoder_init().done
So, invoke the panel_or_bridge from host attach and
bridge attach in order to find all possible DSI devices.
Signed-off-by: Jagan Teki
---
drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c | 58 ++-
1 file changed, 43 insertions(+), 15 deletions(-)
diff --git a/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c
b/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c
index 6b268f9445b3..45f4515dda00 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c
@@ -246,6 +246,7 @@ struct dw_mipi_dsi {
struct clk *pclk;
+ bool device_found;
unsigned int lane_mbps; /* per lane */
u32 channel;
u32 lanes;
@@ -309,13 +310,37 @@ static inline u32 dsi_read(struct dw_mipi_dsi *dsi, u32
reg)
return readl(dsi->base + reg);
}
+static int dw_mipi_dsi_panel_or_bridge(struct dw_mipi_dsi *dsi,
+ struct device_node *node)
+{
+ struct drm_bridge *bridge;
+ struct drm_panel *panel;
+ int ret;
+
+ ret = drm_of_find_panel_or_bridge(node, 1, 0, , );
+ if (ret)
+ return ret;
+
+ if (panel) {
+ bridge = drm_panel_bridge_add_typed(panel,
+ DRM_MODE_CONNECTOR_DSI);
+ if (IS_ERR(bridge))
+ return PTR_ERR(bridge);
+ }
+
+ dsi->panel_bridge = bridge;
+
+ if (!dsi->panel_bridge)
+ return -EPROBE_DEFER;
+
+ return 0;
+}
+
static int dw_mipi_dsi_host_attach(struct mipi_dsi_host *host,
struct mipi_dsi_device *device)
{
struct dw_mipi_dsi *dsi = host_to_dsi(host);
const struct dw_mipi_dsi_plat_data *pdata = dsi->plat_data;
- struct drm_bridge *bridge;
- struct drm_panel *panel;
int ret;
if (device->lanes > dsi->plat_data->max_data_lanes) {
@@ -329,22 +354,14 @@ static int dw_mipi_dsi_host_attach(struct mipi_dsi_host
*host,
dsi->format = device->format;
dsi->mode_flags = device->mode_flags;
- ret = drm_of_find_panel_or_bridge(host->dev->of_node, 1, 0,
- , );
- if (ret)
- return ret;
+ if (!dsi->device_found) {
+ ret = dw_mipi_dsi_panel_or_bridge(dsi, host->dev->of_node);
+ if (ret)
+ return ret;
- if (panel) {
- bridge = drm_panel_bridge_add_typed(panel,
- DRM_MODE_CONNECTOR_DSI);
- if (IS_ERR(bridge))
- return PTR_ERR(bridge);
+ dsi->device_found = true;
}
- dsi->panel_bridge = bridge;
-
- drm_bridge_add(>bridge);
-
if (pdata->host_ops && pdata->host_ops->attach) {
ret = pdata->host_ops->attach(pdata->priv_data, device);
if (ret < 0)
@@ -999,6 +1016,16 @@ static int dw_mipi_dsi_bridge_attach(struct drm_bridge
*bridge,
/* Set the encoder type as caller does not know it */
bridge->encoder->encoder_type = DRM_MODE_ENCODER_DSI;
+ if (!dsi->device_found) {
+ int ret;
+
+ ret = dw_mipi_dsi_panel_or_bridge(dsi, dsi->dev->of_node);
+ if (ret)
+ return ret;
+
+ dsi->device_found = true;
+ }
+
/* Attach the panel-bridge to the dsi bridge */
return drm_bridge_attach(bridge->encoder, dsi->panel_bridge, bridge,
flags);
@@ -1181,6 +1208,7 @@ __dw_mipi_dsi_probe(struct platform_device *pdev,
#ifdef CONFIG_OF
dsi->bridge.of_node =
