From: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
To: Jacopo Mondi <jacopo+renesas@jmondi.org>
Cc: kieran.bingham+renesas@ideasonboard.com, airlied@linux.ie,
daniel@ffwll.ch, koji.matsuoka.xm@renesas.com, muroya@ksk.co.jp,
VenkataRajesh.Kalakodima@in.bosch.com,
Harsha.ManjulaMallikarjun@in.bosch.com,
linux-renesas-soc@vger.kernel.org,
dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 16/20] drm: rcar-du: kms: Collect CMM instances
Date: Fri, 7 Jun 2019 14:49:49 +0300 [thread overview]
Message-ID: <20190607114949.GE7593@pendragon.ideasonboard.com> (raw)
In-Reply-To: <20190606142220.1392-17-jacopo+renesas@jmondi.org>
Hi Jacopo,
Thank you for the patch.
On Thu, Jun 06, 2019 at 04:22:16PM +0200, Jacopo Mondi wrote:
> Implement device tree parsing to collect the available CMM instances
> described by the 'cmms' property. Associate CMMs with CRTCs and store a
> mask of active CMMs in the DU group for later enablement.
>
> Also define a new feature to let each SoC claim support for CMM.
The feature is added in the previous patch.
> Signed-off-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
> ---
> drivers/gpu/drm/rcar-du/rcar_du_crtc.c | 7 ++++
> drivers/gpu/drm/rcar-du/rcar_du_crtc.h | 2 +
> drivers/gpu/drm/rcar-du/rcar_du_drv.h | 3 ++
> drivers/gpu/drm/rcar-du/rcar_du_group.h | 2 +
> drivers/gpu/drm/rcar-du/rcar_du_kms.c | 50 +++++++++++++++++++++++++
> 5 files changed, 64 insertions(+)
>
> diff --git a/drivers/gpu/drm/rcar-du/rcar_du_crtc.c b/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
> index 2da46e3dc4ae..9f270a54b164 100644
> --- a/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
> +++ b/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
> @@ -1194,6 +1194,13 @@ int rcar_du_crtc_create(struct rcar_du_group *rgrp, unsigned int swindex,
> if (ret < 0)
> return ret;
>
> + /* CMM might be disabled for this CRTC. */
> + if (rcar_du_has(rcdu, RCAR_DU_FEATURE_CMM) &&
> + rcdu->cmms[swindex]) {
You can skip testing RCAR_DU_FEATURE_CMM here as rcdu->cmms[swindex]
can't be set if the feature isn't available.
> + rcrtc->cmm = rcdu->cmms[swindex];
> + rgrp->cmms_mask |= BIT(hwindex % 2);
> + }
> +
> drm_crtc_helper_add(crtc, &crtc_helper_funcs);
>
> /* Start with vertical blanking interrupt reporting disabled. */
> diff --git a/drivers/gpu/drm/rcar-du/rcar_du_crtc.h b/drivers/gpu/drm/rcar-du/rcar_du_crtc.h
> index 3b7fc668996f..5f2940c42225 100644
> --- a/drivers/gpu/drm/rcar-du/rcar_du_crtc.h
> +++ b/drivers/gpu/drm/rcar-du/rcar_du_crtc.h
> @@ -39,6 +39,7 @@ struct rcar_du_vsp;
> * @vblank_wait: wait queue used to signal vertical blanking
> * @vblank_count: number of vertical blanking interrupts to wait for
> * @group: CRTC group this CRTC belongs to
> + * @cmm: CMM associated with this CRTC
> * @vsp: VSP feeding video to this CRTC
> * @vsp_pipe: index of the VSP pipeline feeding video to this CRTC
> * @writeback: the writeback connector
> @@ -64,6 +65,7 @@ struct rcar_du_crtc {
> unsigned int vblank_count;
>
> struct rcar_du_group *group;
> + struct platform_device *cmm;
> struct rcar_du_vsp *vsp;
> unsigned int vsp_pipe;
>
> diff --git a/drivers/gpu/drm/rcar-du/rcar_du_drv.h b/drivers/gpu/drm/rcar-du/rcar_du_drv.h
> index a00dccc447aa..300ec60ba31b 100644
> --- a/drivers/gpu/drm/rcar-du/rcar_du_drv.h
> +++ b/drivers/gpu/drm/rcar-du/rcar_du_drv.h
> @@ -13,6 +13,7 @@
> #include <linux/kernel.h>
> #include <linux/wait.h>
>
> +#include "rcar_cmm.h"
> #include "rcar_du_crtc.h"
> #include "rcar_du_group.h"
> #include "rcar_du_vsp.h"
> @@ -70,6 +71,7 @@ struct rcar_du_device_info {
>
> #define RCAR_DU_MAX_CRTCS 4
> #define RCAR_DU_MAX_GROUPS DIV_ROUND_UP(RCAR_DU_MAX_CRTCS, 2)
> +#define RCAR_DU_MAX_CMMS 4
> #define RCAR_DU_MAX_VSPS 4
>
> struct rcar_du_device {
> @@ -86,6 +88,7 @@ struct rcar_du_device {
> struct rcar_du_encoder *encoders[RCAR_DU_OUTPUT_MAX];
>
> struct rcar_du_group groups[RCAR_DU_MAX_GROUPS];
> + struct platform_device *cmms[RCAR_DU_MAX_CMMS];
> struct rcar_du_vsp vsps[RCAR_DU_MAX_VSPS];
>
> struct {
> diff --git a/drivers/gpu/drm/rcar-du/rcar_du_group.h b/drivers/gpu/drm/rcar-du/rcar_du_group.h
> index 87950c1f6a52..b0c1466593a3 100644
> --- a/drivers/gpu/drm/rcar-du/rcar_du_group.h
> +++ b/drivers/gpu/drm/rcar-du/rcar_du_group.h
> @@ -22,6 +22,7 @@ struct rcar_du_device;
> * @mmio_offset: registers offset in the device memory map
> * @index: group index
> * @channels_mask: bitmask of populated DU channels in this group
> + * @cmms_mask: bitmask of enabled CMMs in this group
> * @num_crtcs: number of CRTCs in this group (1 or 2)
> * @use_count: number of users of the group (rcar_du_group_(get|put))
> * @used_crtcs: number of CRTCs currently in use
> @@ -37,6 +38,7 @@ struct rcar_du_group {
> unsigned int index;
>
> unsigned int channels_mask;
> + unsigned int cmms_mask;
> unsigned int num_crtcs;
> unsigned int use_count;
> unsigned int used_crtcs;
> diff --git a/drivers/gpu/drm/rcar-du/rcar_du_kms.c b/drivers/gpu/drm/rcar-du/rcar_du_kms.c
> index adbc4f5d8fc5..5a910a04e1d9 100644
> --- a/drivers/gpu/drm/rcar-du/rcar_du_kms.c
> +++ b/drivers/gpu/drm/rcar-du/rcar_du_kms.c
> @@ -18,6 +18,7 @@
> #include <drm/drm_vblank.h>
>
> #include <linux/of_graph.h>
> +#include <linux/of_platform.h>
> #include <linux/wait.h>
>
> #include "rcar_du_crtc.h"
> @@ -614,6 +615,48 @@ static int rcar_du_vsps_init(struct rcar_du_device *rcdu)
> return ret;
> }
>
> +static int rcar_du_cmm_init(struct rcar_du_device *rcdu)
> +{
> + const struct device_node *np = rcdu->dev->of_node;
> + unsigned int cells;
> + unsigned int i;
> +
> + cells = of_property_count_u32_elems(np, "cmms");
> + if (cells > RCAR_DU_MAX_CMMS || cells > rcdu->num_crtcs) {
> + dev_err(rcdu->dev, "invalid 'cmms' property format\n");
> + return -EINVAL;
> + }
I don't think you need to count the elements first, you can loop over
the number of CRTCs below.
> +
> + for (i = 0; i < cells; ++i) {
> + struct platform_device *pdev;
> + struct device_node *cmm;
> +
> + cmm = of_parse_phandle(np, "cmms", i);
> + if (IS_ERR(cmm)) {
> + dev_err(rcdu->dev, "failed to parse 'cmms' property\n");
> + return PTR_ERR(cmm);
> + }
> +
> + pdev = of_find_device_by_node(cmm);
> + if (IS_ERR(pdev)) {
> + dev_err(rcdu->dev, "invalid property 'cmms'[%u]\n", i);
How about "No device found for cmms[%u]\n" ?
> + of_node_put(cmm);
> + return PTR_ERR(pdev);
> + }
> +
> + if (!of_device_is_available(cmm)) {
> + /* It's fine to have a phandle to a non-enabled CMM. */
> + of_node_put(cmm);
> + continue;
> + }
> +
> + of_node_put(cmm);
> + rcdu->cmms[i] = pdev;
> + }
> +
> + return 0;
> +}
> +
> int rcar_du_modeset_init(struct rcar_du_device *rcdu)
> {
> static const unsigned int mmio_offsets[] = {
> @@ -704,6 +747,13 @@ int rcar_du_modeset_init(struct rcar_du_device *rcdu)
> return ret;
> }
>
> + /* Initialize the Color Management Modules. */
> + if (rcar_du_has(rcdu, RCAR_DU_FEATURE_CMM)) {
Instead of using a feature, could we simply return 0 in
rcar_du_cmm_init() if the cmms property doesn't exist ? This will
preserve compatibility with older DTs.
> + ret = rcar_du_cmm_init(rcdu);
> + if (ret < 0)
> + return ret;
> + }
> +
> /* Create the CRTCs. */
> for (swindex = 0, hwindex = 0; swindex < rcdu->num_crtcs; ++hwindex) {
> struct rcar_du_group *rgrp;
--
Regards,
Laurent Pinchart
next prev parent reply other threads:[~2019-06-07 11:50 UTC|newest]
Thread overview: 58+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-06 14:22 [PATCH 00/20] drm: rcar-du: Add Color Management Module (CMM) Jacopo Mondi
2019-06-06 14:22 ` [PATCH 01/20] dt-bindings: display: renesas,cmm: Add R-Car CMM documentation Jacopo Mondi
2019-06-06 16:52 ` Laurent Pinchart
2019-06-06 18:06 ` Geert Uytterhoeven
2019-06-06 20:19 ` Sergei Shtylyov
2019-06-06 14:22 ` [PATCH 02/20] dt-bindings: display, renesas,du: Document cmms property Jacopo Mondi
2019-06-06 16:52 ` Laurent Pinchart
2019-06-06 14:22 ` [PATCH 03/20] dt-bindings: display, renesas,du: Update 'vsps' in example Jacopo Mondi
2019-06-06 16:53 ` Laurent Pinchart
2019-06-06 20:00 ` Geert Uytterhoeven
2019-06-07 11:36 ` Laurent Pinchart
2019-06-06 14:22 ` [PATCH 04/20] clk: renesas: r8a7796: Add CMM clocks Jacopo Mondi
2019-06-06 14:22 ` [PATCH 05/20] clk: renesas: r8a7795: " Jacopo Mondi
2019-06-06 16:58 ` Laurent Pinchart
2019-06-06 18:18 ` Jacopo Mondi
2019-06-12 7:41 ` Geert Uytterhoeven
2019-06-06 14:22 ` [PATCH 06/20] clk: renesas: r8a77965: " Jacopo Mondi
2019-06-06 16:59 ` Laurent Pinchart
2019-06-12 7:43 ` Geert Uytterhoeven
2019-06-06 14:22 ` [PATCH 07/20] clk: renesas: r8a77990: " Jacopo Mondi
2019-06-06 17:00 ` Laurent Pinchart
2019-06-12 7:43 ` Geert Uytterhoeven
2019-06-06 14:22 ` [PATCH 08/20] clk: renesas: r8a77995: " Jacopo Mondi
2019-06-06 17:00 ` Laurent Pinchart
2019-06-12 7:44 ` Geert Uytterhoeven
2019-06-06 14:22 ` [PATCH 09/20] arm64: dts: renesas: r8a7796: Add CMM units Jacopo Mondi
2019-06-06 17:04 ` Laurent Pinchart
2019-06-06 14:22 ` [PATCH 10/20] arm64: dts: renesas: r8a7795: " Jacopo Mondi
2019-06-06 17:06 ` Laurent Pinchart
2019-06-06 14:22 ` [PATCH 11/20] arm64: dts: renesas: r8a77965: " Jacopo Mondi
2019-06-06 17:06 ` Laurent Pinchart
2019-06-06 14:22 ` [PATCH 12/20] arm64: dts: renesas: r8a77990: " Jacopo Mondi
2019-06-06 17:07 ` Laurent Pinchart
2019-06-06 14:22 ` [PATCH 13/20] arm64: dts: renesas: r8a77995: " Jacopo Mondi
2019-06-06 17:08 ` Laurent Pinchart
2019-06-06 14:22 ` [PATCH 14/20] drm: rcar-du: Add support for CMM Jacopo Mondi
2019-06-07 11:35 ` Laurent Pinchart
2019-06-07 11:44 ` Laurent Pinchart
2019-06-07 12:18 ` Laurent Pinchart
2019-06-14 8:54 ` Jacopo Mondi
2019-06-06 14:22 ` [PATCH 15/20] drm: rcar-du: Claim CMM support for Gen3 SoCs Jacopo Mondi
2019-06-07 11:38 ` Laurent Pinchart
2019-06-06 14:22 ` [PATCH 16/20] drm: rcar-du: kms: Collect CMM instances Jacopo Mondi
2019-06-07 11:49 ` Laurent Pinchart [this message]
2019-06-06 14:22 ` [PATCH 17/20] drm: rcar-du: crtc: Enable and disable CMMs Jacopo Mondi
2019-06-07 11:51 ` Laurent Pinchart
2019-06-06 14:22 ` [PATCH 18/20] drm: rcar-du: group: Enable DU's CMM extension Jacopo Mondi
2019-06-07 11:55 ` Laurent Pinchart
2019-06-06 14:22 ` [PATCH 19/20] drm: rcar-du: crtc: Register GAMMA_LUT properties Jacopo Mondi
2019-06-07 12:03 ` Laurent Pinchart
2019-06-14 8:15 ` Jacopo Mondi
2019-06-14 8:42 ` Daniel Vetter
2019-06-14 9:27 ` Jacopo Mondi
2019-06-14 14:47 ` Daniel Vetter
2019-06-06 14:22 ` [PATCH 20/20] drm: rcar-du: kms: Update CMM in atomic commit tail Jacopo Mondi
2019-06-07 12:06 ` Laurent Pinchart
2019-06-14 8:19 ` Jacopo Mondi
2019-09-12 23:39 ` Laurent Pinchart
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