Re: [PATCH v6 5/8] drm: rcar-du: crtc: Control CMM operations
Hi Jacopo,
Thank you for the patch.
On Wed, Oct 16, 2019 at 10:55:45AM +0200, Jacopo Mondi wrote:
> Implement CMM handling in the crtc begin and enable atomic callbacks,
> and enable CMM unit through the Display Extensional Functions
> register at group setup time.
>
> Reviewed-by: Kieran Bingham
> Signed-off-by: Jacopo Mondi
> ---
> drivers/gpu/drm/rcar-du/rcar_du_crtc.c | 55 +
> drivers/gpu/drm/rcar-du/rcar_du_group.c | 10 +
> drivers/gpu/drm/rcar-du/rcar_du_regs.h | 5 +++
> 3 files changed, 70 insertions(+)
>
> diff --git a/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
> b/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
> index 23f1d6cc1719..d7ad491577f3 100644
> --- a/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
> +++ b/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
> @@ -21,6 +21,7 @@
> #include
> #include
>
> +#include "rcar_cmm.h"
> #include "rcar_du_crtc.h"
> #include "rcar_du_drv.h"
> #include "rcar_du_encoder.h"
> @@ -474,6 +475,45 @@ static void rcar_du_crtc_wait_page_flip(struct
> rcar_du_crtc *rcrtc)
> rcar_du_crtc_finish_page_flip(rcrtc);
> }
>
> +/*
> -
> + * Color Management Module (CMM)
> + */
> +
> +static int rcar_du_cmm_check(struct drm_crtc *crtc,
> + struct drm_crtc_state *state)
> +{
> + struct drm_property_blob *drm_lut = state->gamma_lut;
> + struct rcar_du_crtc *rcrtc = to_rcar_crtc(crtc);
> + struct device *dev = rcrtc->dev->dev;
> +
> + if (!rcrtc->cmm || !drm_lut)
As the gamma LUT property is only created when CMM is present, can't you
drop the first part of this condition ?
> + return 0;
> +
> + /* We only accept fully populated LUT tables. */
> + if (drm_color_lut_size(drm_lut) != CM2_LUT_SIZE) {
> + dev_err(dev, "invalid gamma lut size: %lu bytes\n",
> + drm_lut->length);
> + return -EINVAL;
> + }
> +
> + return 0;
> +}
> +
> +static void rcar_du_cmm_setup(struct drm_crtc *crtc)
> +{
> + struct drm_property_blob *drm_lut = crtc->state->gamma_lut;
> + struct rcar_du_crtc *rcrtc = to_rcar_crtc(crtc);
> + struct rcar_cmm_config cmm_config = {};
> +
> + if (!rcrtc->cmm)
> + return;
> +
> + if (drm_lut)
> + cmm_config.lut.table = (struct drm_color_lut *)drm_lut->data;
> +
> + rcar_cmm_setup(rcrtc->cmm, _config);
> +}
> +
> /*
> -
> * Start/Stop and Suspend/Resume
> */
> @@ -619,6 +659,9 @@ static void rcar_du_crtc_stop(struct rcar_du_crtc *rcrtc)
> if (rcar_du_has(rcrtc->dev, RCAR_DU_FEATURE_VSP1_SOURCE))
> rcar_du_vsp_disable(rcrtc);
>
> + if (rcrtc->cmm)
> + rcar_cmm_disable(rcrtc->cmm);
> +
> /*
>* Select switch sync mode. This stops display operation and configures
>* the HSYNC and VSYNC signals as inputs.
> @@ -642,6 +685,11 @@ static int rcar_du_crtc_atomic_check(struct drm_crtc
> *crtc,
> {
> struct rcar_du_crtc_state *rstate = to_rcar_crtc_state(state);
> struct drm_encoder *encoder;
> + int ret;
> +
> + ret = rcar_du_cmm_check(crtc, state);
> + if (ret)
> + return ret;
>
> /* Store the routes from the CRTC output to the DU outputs. */
> rstate->outputs = 0;
> @@ -667,6 +715,8 @@ static void rcar_du_crtc_atomic_enable(struct drm_crtc
> *crtc,
> struct rcar_du_crtc_state *rstate = to_rcar_crtc_state(crtc->state);
> struct rcar_du_device *rcdu = rcrtc->dev;
>
> + if (rcrtc->cmm)
> + rcar_cmm_enable(rcrtc->cmm);
> rcar_du_crtc_get(rcrtc);
>
> /*
> @@ -686,6 +736,7 @@ static void rcar_du_crtc_atomic_enable(struct drm_crtc
> *crtc,
> }
>
> rcar_du_crtc_start(rcrtc);
> + rcar_du_cmm_setup(crtc);
Let's add a TODO here to figure out why we can't setup CMM before
starting the CRTC.
With these two small issues fixed,
Reviewed-by: Laurent Pinchart
> }
>
> static void rcar_du_crtc_atomic_disable(struct drm_crtc *crtc,
> @@ -739,6 +790,10 @@ static void rcar_du_crtc_atomic_begin(struct drm_crtc
> *crtc,
>*/
> rcar_du_crtc_get(rcrtc);
>
> + /* If the active state changed, we let .atomic_enable handle CMM. */
> + if (crtc->state->color_mgmt_changed && !crtc->state->active_changed)
> + rcar_du_cmm_setup(crtc);
> +
> if (rcar_du_has(rcrtc->dev, RCAR_DU_FEATURE_VSP1_SOURCE))
> rcar_du_vsp_atomic_begin(rcrtc);
> }
> diff --git a/drivers/gpu/drm/rcar-du/rcar_du_group.c
> b/drivers/gpu/drm/rcar-du/rcar_du_group.c
> index 9eee47969e77..88a783ceb3e9 100644
> --- a/drivers/gpu/drm/rcar-du/rcar_du_group.c
> +++ b/drivers/gpu/drm/rcar-du/rcar_du_group.c
> @@ -135,6 +135,7 @@ static void rcar_du_group_setup_didsr(struct
> rcar_du_group *rgrp)
> static void rcar_du_group_setup(struct rcar_du_group *rgrp)
> {
>
[PATCH v6 5/8] drm: rcar-du: crtc: Control CMM operations
Implement CMM handling in the crtc begin and enable atomic callbacks,
and enable CMM unit through the Display Extensional Functions
register at group setup time.
Reviewed-by: Kieran Bingham
Signed-off-by: Jacopo Mondi
---
drivers/gpu/drm/rcar-du/rcar_du_crtc.c | 55 +
drivers/gpu/drm/rcar-du/rcar_du_group.c | 10 +
drivers/gpu/drm/rcar-du/rcar_du_regs.h | 5 +++
3 files changed, 70 insertions(+)
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
b/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
index 23f1d6cc1719..d7ad491577f3 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
@@ -21,6 +21,7 @@
#include
#include
+#include "rcar_cmm.h"
#include "rcar_du_crtc.h"
#include "rcar_du_drv.h"
#include "rcar_du_encoder.h"
@@ -474,6 +475,45 @@ static void rcar_du_crtc_wait_page_flip(struct
rcar_du_crtc *rcrtc)
rcar_du_crtc_finish_page_flip(rcrtc);
}
+/*
-
+ * Color Management Module (CMM)
+ */
+
+static int rcar_du_cmm_check(struct drm_crtc *crtc,
+struct drm_crtc_state *state)
+{
+ struct drm_property_blob *drm_lut = state->gamma_lut;
+ struct rcar_du_crtc *rcrtc = to_rcar_crtc(crtc);
+ struct device *dev = rcrtc->dev->dev;
+
+ if (!rcrtc->cmm || !drm_lut)
+ return 0;
+
+ /* We only accept fully populated LUT tables. */
+ if (drm_color_lut_size(drm_lut) != CM2_LUT_SIZE) {
+ dev_err(dev, "invalid gamma lut size: %lu bytes\n",
+ drm_lut->length);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static void rcar_du_cmm_setup(struct drm_crtc *crtc)
+{
+ struct drm_property_blob *drm_lut = crtc->state->gamma_lut;
+ struct rcar_du_crtc *rcrtc = to_rcar_crtc(crtc);
+ struct rcar_cmm_config cmm_config = {};
+
+ if (!rcrtc->cmm)
+ return;
+
+ if (drm_lut)
+ cmm_config.lut.table = (struct drm_color_lut *)drm_lut->data;
+
+ rcar_cmm_setup(rcrtc->cmm, _config);
+}
+
/*
-
* Start/Stop and Suspend/Resume
*/
@@ -619,6 +659,9 @@ static void rcar_du_crtc_stop(struct rcar_du_crtc *rcrtc)
if (rcar_du_has(rcrtc->dev, RCAR_DU_FEATURE_VSP1_SOURCE))
rcar_du_vsp_disable(rcrtc);
+ if (rcrtc->cmm)
+ rcar_cmm_disable(rcrtc->cmm);
+
/*
* Select switch sync mode. This stops display operation and configures
* the HSYNC and VSYNC signals as inputs.
@@ -642,6 +685,11 @@ static int rcar_du_crtc_atomic_check(struct drm_crtc *crtc,
{
struct rcar_du_crtc_state *rstate = to_rcar_crtc_state(state);
struct drm_encoder *encoder;
+ int ret;
+
+ ret = rcar_du_cmm_check(crtc, state);
+ if (ret)
+ return ret;
/* Store the routes from the CRTC output to the DU outputs. */
rstate->outputs = 0;
@@ -667,6 +715,8 @@ static void rcar_du_crtc_atomic_enable(struct drm_crtc
*crtc,
struct rcar_du_crtc_state *rstate = to_rcar_crtc_state(crtc->state);
struct rcar_du_device *rcdu = rcrtc->dev;
+ if (rcrtc->cmm)
+ rcar_cmm_enable(rcrtc->cmm);
rcar_du_crtc_get(rcrtc);
/*
@@ -686,6 +736,7 @@ static void rcar_du_crtc_atomic_enable(struct drm_crtc
*crtc,
}
rcar_du_crtc_start(rcrtc);
+ rcar_du_cmm_setup(crtc);
}
static void rcar_du_crtc_atomic_disable(struct drm_crtc *crtc,
@@ -739,6 +790,10 @@ static void rcar_du_crtc_atomic_begin(struct drm_crtc
*crtc,
*/
rcar_du_crtc_get(rcrtc);
+ /* If the active state changed, we let .atomic_enable handle CMM. */
+ if (crtc->state->color_mgmt_changed && !crtc->state->active_changed)
+ rcar_du_cmm_setup(crtc);
+
if (rcar_du_has(rcrtc->dev, RCAR_DU_FEATURE_VSP1_SOURCE))
rcar_du_vsp_atomic_begin(rcrtc);
}
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_group.c
b/drivers/gpu/drm/rcar-du/rcar_du_group.c
index 9eee47969e77..88a783ceb3e9 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_group.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_group.c
@@ -135,6 +135,7 @@ static void rcar_du_group_setup_didsr(struct rcar_du_group
*rgrp)
static void rcar_du_group_setup(struct rcar_du_group *rgrp)
{
struct rcar_du_device *rcdu = rgrp->dev;
+ u32 defr7 = DEFR7_CODE;
/* Enable extended features */
rcar_du_group_write(rgrp, DEFR, DEFR_CODE | DEFR_DEFE);
@@ -147,6 +148,15 @@ static void rcar_du_group_setup(struct rcar_du_group *rgrp)
rcar_du_group_setup_pins(rgrp);
+ /*
+* TODO: Handle routing of the DU output to CMM dynamically, as we
+* should bypass CMM completely when no color management feature is
+* used.
+*/
+ defr7 |= (rgrp->cmms_mask &
