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Message-ID: <20230623165038.GB2112@pendragon.ideasonboard.com>
Date: Fri, 23 Jun 2023 19:50:38 +0300
From: Laurent Pinchart <laurent.pinchart@...asonboard.com>
To: Geert Uytterhoeven <geert+renesas@...der.be>
Cc: Kieran Bingham <kieran.bingham+renesas@...asonboard.com>,
David Airlie <airlied@...il.com>,
Daniel Vetter <daniel@...ll.ch>,
Thomas Zimmermann <tzimmermann@...e.de>,
Magnus Damm <magnus.damm@...il.com>,
dri-devel@...ts.freedesktop.org, linux-renesas-soc@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH 24/39] drm: renesas: shmobile: Unify plane allocation
Hi Geert,
Thank you for the patch.
On Thu, Jun 22, 2023 at 11:21:36AM +0200, Geert Uytterhoeven wrote:
> Unify primary and overlay plane allocation:
> - Enhance shmob_drm_plane_create() so it can be used to create the
> primary plane, too,
> - Move overlay plane creation next to primary plane creation.
>
> As overlay plane index zero now means the primary plane, this requires
> shifting all overlay plane indices by one.
Do you use index zero to identify the primary plane just for
shmob_drm_plane_create(), or somewhere else too ? If it's just to create
the plane, you could instead pass the plane type to the function.
> Signed-off-by: Geert Uytterhoeven <geert+renesas@...der.be>
> ---
> Perhaps it would be better to not use dynamic allocation, but store
> "struct drm_plane primary" and "struct shmob_drm_plane planes[5]" in
> struct drm_shmob_device instead, like is done for the crtc and encoder?
> ---
> .../gpu/drm/renesas/shmobile/shmob_drm_crtc.c | 39 ++------
> .../gpu/drm/renesas/shmobile/shmob_drm_drv.c | 9 --
> .../drm/renesas/shmobile/shmob_drm_plane.c | 96 +++++++++++--------
> .../drm/renesas/shmobile/shmob_drm_plane.h | 3 +-
> 4 files changed, 70 insertions(+), 77 deletions(-)
>
> diff --git a/drivers/gpu/drm/renesas/shmobile/shmob_drm_crtc.c b/drivers/gpu/drm/renesas/shmobile/shmob_drm_crtc.c
> index 28a70536693f7788..3f6af12f45988124 100644
> --- a/drivers/gpu/drm/renesas/shmobile/shmob_drm_crtc.c
> +++ b/drivers/gpu/drm/renesas/shmobile/shmob_drm_crtc.c
> @@ -19,7 +19,6 @@
> #include <drm/drm_gem_dma_helper.h>
> #include <drm/drm_modeset_helper.h>
> #include <drm/drm_modeset_helper_vtables.h>
> -#include <drm/drm_plane_helper.h>
> #include <drm/drm_probe_helper.h>
> #include <drm/drm_simple_kms_helper.h>
> #include <drm/drm_vblank.h>
> @@ -501,47 +500,29 @@ static const struct drm_crtc_funcs crtc_funcs = {
> .disable_vblank = shmob_drm_disable_vblank,
> };
>
> -static const uint32_t modeset_formats[] = {
> - DRM_FORMAT_RGB565,
> - DRM_FORMAT_RGB888,
> - DRM_FORMAT_ARGB8888,
> - DRM_FORMAT_XRGB8888,
> - DRM_FORMAT_NV12,
> - DRM_FORMAT_NV21,
> - DRM_FORMAT_NV16,
> - DRM_FORMAT_NV61,
> - DRM_FORMAT_NV24,
> - DRM_FORMAT_NV42,
> -};
> -
> -static const struct drm_plane_funcs primary_plane_funcs = {
> - DRM_PLANE_NON_ATOMIC_FUNCS,
> -};
> -
> int shmob_drm_crtc_create(struct shmob_drm_device *sdev)
> {
> struct drm_crtc *crtc = &sdev->crtc.crtc;
> - struct drm_plane *primary;
> + struct drm_plane *primary, *plane;
> + unsigned int i;
> int ret;
>
> sdev->crtc.dpms = DRM_MODE_DPMS_OFF;
>
> - primary = __drm_universal_plane_alloc(&sdev->ddev, sizeof(*primary), 0,
> - 0, &primary_plane_funcs,
> - modeset_formats,
> - ARRAY_SIZE(modeset_formats),
> - NULL, DRM_PLANE_TYPE_PRIMARY,
> - NULL);
> + primary = shmob_drm_plane_create(sdev, 0);
> if (IS_ERR(primary))
> return PTR_ERR(primary);
>
> + for (i = 1; i < 5; ++i) {
> + plane = shmob_drm_plane_create(sdev, i);
> + if (IS_ERR(plane))
> + return PTR_ERR(plane);
> + }
> +
> ret = drm_crtc_init_with_planes(&sdev->ddev, crtc, primary, NULL,
> &crtc_funcs, NULL);
> - if (ret < 0) {
> - drm_plane_cleanup(primary);
> - kfree(primary);
> + if (ret < 0)
> return ret;
> - }
>
> drm_crtc_helper_add(crtc, &crtc_helper_funcs);
>
> diff --git a/drivers/gpu/drm/renesas/shmobile/shmob_drm_drv.c b/drivers/gpu/drm/renesas/shmobile/shmob_drm_drv.c
> index c15ebbe74cac501f..c98e2bdd888c3274 100644
> --- a/drivers/gpu/drm/renesas/shmobile/shmob_drm_drv.c
> +++ b/drivers/gpu/drm/renesas/shmobile/shmob_drm_drv.c
> @@ -154,7 +154,6 @@ static int shmob_drm_probe(struct platform_device *pdev)
> struct shmob_drm_platform_data *pdata = pdev->dev.platform_data;
> struct shmob_drm_device *sdev;
> struct drm_device *ddev;
> - unsigned int i;
> int ret;
>
> if (pdata == NULL) {
> @@ -195,14 +194,6 @@ static int shmob_drm_probe(struct platform_device *pdev)
> return dev_err_probe(&pdev->dev, ret,
> "failed to initialize mode setting\n");
>
> - for (i = 0; i < 4; ++i) {
> - ret = shmob_drm_plane_create(sdev, i);
> - if (ret < 0) {
> - dev_err(&pdev->dev, "failed to create plane %u\n", i);
> - goto err_modeset_cleanup;
> - }
> - }
> -
> ret = drm_vblank_init(ddev, 1);
> if (ret < 0) {
> dev_err(&pdev->dev, "failed to initialize vblank\n");
> diff --git a/drivers/gpu/drm/renesas/shmobile/shmob_drm_plane.c b/drivers/gpu/drm/renesas/shmobile/shmob_drm_plane.c
> index c58b9dca34736342..63886015baaebfc0 100644
> --- a/drivers/gpu/drm/renesas/shmobile/shmob_drm_plane.c
> +++ b/drivers/gpu/drm/renesas/shmobile/shmob_drm_plane.c
> @@ -12,6 +12,7 @@
> #include <drm/drm_fourcc.h>
> #include <drm/drm_framebuffer.h>
> #include <drm/drm_gem_dma_helper.h>
> +#include <drm/drm_plane_helper.h>
>
> #include "shmob_drm_drv.h"
> #include "shmob_drm_kms.h"
> @@ -64,57 +65,58 @@ static void __shmob_drm_plane_setup(struct shmob_drm_plane *splane,
> struct drm_framebuffer *fb)
> {
> struct shmob_drm_device *sdev = to_shmob_device(splane->plane.dev);
> + unsigned int ovl_idx = splane->index - 1;
> u32 format;
>
> /* TODO: Support ROP3 mode */
> format = LDBBSIFR_EN | (splane->alpha << LDBBSIFR_LAY_SHIFT) |
> splane->format->ldbbsifr;
>
> -#define plane_reg_dump(sdev, splane, reg) \
> +#define plane_reg_dump(sdev, ovl_idx, reg) \
> dev_dbg(sdev->ddev.dev, "%s(%u): %s 0x%08x 0x%08x\n", __func__, \
> - splane->index, #reg, \
> - lcdc_read(sdev, reg(splane->index)), \
> - lcdc_read(sdev, reg(splane->index) + LCDC_SIDE_B_OFFSET))
> -
> - plane_reg_dump(sdev, splane, LDBnBSIFR);
> - plane_reg_dump(sdev, splane, LDBnBSSZR);
> - plane_reg_dump(sdev, splane, LDBnBLOCR);
> - plane_reg_dump(sdev, splane, LDBnBSMWR);
> - plane_reg_dump(sdev, splane, LDBnBSAYR);
> - plane_reg_dump(sdev, splane, LDBnBSACR);
> -
> - lcdc_write(sdev, LDBCR, LDBCR_UPC(splane->index));
> - dev_dbg(sdev->ddev.dev, "%s(%u): %s 0x%08x\n", __func__, splane->index,
> + ovl_idx, #reg, \
> + lcdc_read(sdev, reg(ovl_idx)), \
> + lcdc_read(sdev, reg(ovl_idx) + LCDC_SIDE_B_OFFSET))
> +
> + plane_reg_dump(sdev, ovl_idx, LDBnBSIFR);
> + plane_reg_dump(sdev, ovl_idx, LDBnBSSZR);
> + plane_reg_dump(sdev, ovl_idx, LDBnBLOCR);
> + plane_reg_dump(sdev, ovl_idx, LDBnBSMWR);
> + plane_reg_dump(sdev, ovl_idx, LDBnBSAYR);
> + plane_reg_dump(sdev, ovl_idx, LDBnBSACR);
> +
> + lcdc_write(sdev, LDBCR, LDBCR_UPC(ovl_idx));
> + dev_dbg(sdev->ddev.dev, "%s(%u): %s 0x%08x\n", __func__, ovl_idx,
> "LDBCR", lcdc_read(sdev, LDBCR));
>
> - lcdc_write(sdev, LDBnBSIFR(splane->index), format);
> + lcdc_write(sdev, LDBnBSIFR(ovl_idx), format);
>
> - lcdc_write(sdev, LDBnBSSZR(splane->index),
> + lcdc_write(sdev, LDBnBSSZR(ovl_idx),
> (splane->crtc_h << LDBBSSZR_BVSS_SHIFT) |
> (splane->crtc_w << LDBBSSZR_BHSS_SHIFT));
> - lcdc_write(sdev, LDBnBLOCR(splane->index),
> + lcdc_write(sdev, LDBnBLOCR(ovl_idx),
> (splane->crtc_y << LDBBLOCR_CVLC_SHIFT) |
> (splane->crtc_x << LDBBLOCR_CHLC_SHIFT));
> - lcdc_write(sdev, LDBnBSMWR(splane->index),
> + lcdc_write(sdev, LDBnBSMWR(ovl_idx),
> fb->pitches[0] << LDBBSMWR_BSMW_SHIFT);
>
> shmob_drm_plane_compute_base(splane, fb, splane->src_x, splane->src_y);
>
> - lcdc_write(sdev, LDBnBSAYR(splane->index), splane->dma[0]);
> + lcdc_write(sdev, LDBnBSAYR(ovl_idx), splane->dma[0]);
> if (shmob_drm_format_is_yuv(splane->format))
> - lcdc_write(sdev, LDBnBSACR(splane->index), splane->dma[1]);
> + lcdc_write(sdev, LDBnBSACR(ovl_idx), splane->dma[1]);
>
> lcdc_write(sdev, LDBCR,
> - LDBCR_UPF(splane->index) | LDBCR_UPD(splane->index));
> - dev_dbg(sdev->ddev.dev, "%s(%u): %s 0x%08x\n", __func__, splane->index,
> + LDBCR_UPF(ovl_idx) | LDBCR_UPD(ovl_idx));
> + dev_dbg(sdev->ddev.dev, "%s(%u): %s 0x%08x\n", __func__, ovl_idx,
> "LDBCR", lcdc_read(sdev, LDBCR));
>
> - plane_reg_dump(sdev, splane, LDBnBSIFR);
> - plane_reg_dump(sdev, splane, LDBnBSSZR);
> - plane_reg_dump(sdev, splane, LDBnBLOCR);
> - plane_reg_dump(sdev, splane, LDBnBSMWR);
> - plane_reg_dump(sdev, splane, LDBnBSAYR);
> - plane_reg_dump(sdev, splane, LDBnBSACR);
> + plane_reg_dump(sdev, ovl_idx, LDBnBSIFR);
> + plane_reg_dump(sdev, ovl_idx, LDBnBSSZR);
> + plane_reg_dump(sdev, ovl_idx, LDBnBLOCR);
> + plane_reg_dump(sdev, ovl_idx, LDBnBSMWR);
> + plane_reg_dump(sdev, ovl_idx, LDBnBSAYR);
> + plane_reg_dump(sdev, ovl_idx, LDBnBSACR);
> }
>
> void shmob_drm_plane_setup(struct drm_plane *plane)
> @@ -169,16 +171,22 @@ static int shmob_drm_plane_disable(struct drm_plane *plane,
> {
> struct shmob_drm_device *sdev = to_shmob_device(plane->dev);
> struct shmob_drm_plane *splane = to_shmob_plane(plane);
> + unsigned int ovl_idx = splane->index - 1;
>
> splane->format = NULL;
>
> - lcdc_write(sdev, LDBCR, LDBCR_UPC(splane->index));
> - lcdc_write(sdev, LDBnBSIFR(splane->index), 0);
> + lcdc_write(sdev, LDBCR, LDBCR_UPC(ovl_idx));
> + lcdc_write(sdev, LDBnBSIFR(ovl_idx), 0);
> lcdc_write(sdev, LDBCR,
> - LDBCR_UPF(splane->index) | LDBCR_UPD(splane->index));
> + LDBCR_UPF(ovl_idx) | LDBCR_UPD(ovl_idx));
> return 0;
> }
>
> +static const struct drm_plane_funcs primary_plane_funcs = {
While at it, you can name this shmob_primary_plane_funcs to avoid
namespace clashes.
> + .update_plane = drm_plane_helper_update_primary,
> + .disable_plane = drm_plane_helper_disable_primary,
> +};
> +
> static const struct drm_plane_funcs shmob_drm_plane_funcs = {
And shmob_overlay_plane_funcs for consistency.
> .update_plane = shmob_drm_plane_update,
> .disable_plane = shmob_drm_plane_disable,
> @@ -197,19 +205,31 @@ static const uint32_t formats[] = {
> DRM_FORMAT_NV42,
> };
>
> -int shmob_drm_plane_create(struct shmob_drm_device *sdev, unsigned int index)
> +struct drm_plane *shmob_drm_plane_create(struct shmob_drm_device *sdev,
> + unsigned int index)
> {
> + const struct drm_plane_funcs *funcs;
> struct shmob_drm_plane *splane;
> + enum drm_plane_type type;
> +
> + if (!index) {
> + type = DRM_PLANE_TYPE_PRIMARY;
> + funcs = &primary_plane_funcs;
> + } else {
> + type = DRM_PLANE_TYPE_OVERLAY;
> + funcs = &shmob_drm_plane_funcs;
> + }
>
> - splane = drmm_universal_plane_alloc(&sdev->ddev, struct shmob_drm_plane,
> - plane, 1, &shmob_drm_plane_funcs,
> - formats, ARRAY_SIZE(formats), NULL,
> - DRM_PLANE_TYPE_OVERLAY, NULL);
> + splane = drmm_universal_plane_alloc(&sdev->ddev,
> + struct shmob_drm_plane, plane, 1,
> + funcs, formats,
> + ARRAY_SIZE(formats), NULL, type,
> + NULL);
> if (IS_ERR(splane))
> - return PTR_ERR(splane);
> + return ERR_CAST(splane);
>
> splane->index = index;
> splane->alpha = 255;
>
> - return 0;
> + return &splane->plane;
> }
> diff --git a/drivers/gpu/drm/renesas/shmobile/shmob_drm_plane.h b/drivers/gpu/drm/renesas/shmobile/shmob_drm_plane.h
> index e72b21a4288fc23f..29cf6732d479a509 100644
> --- a/drivers/gpu/drm/renesas/shmobile/shmob_drm_plane.h
> +++ b/drivers/gpu/drm/renesas/shmobile/shmob_drm_plane.h
> @@ -13,7 +13,8 @@
> struct drm_plane;
> struct shmob_drm_device;
>
> -int shmob_drm_plane_create(struct shmob_drm_device *sdev, unsigned int index);
> +struct drm_plane *shmob_drm_plane_create(struct shmob_drm_device *sdev,
> + unsigned int index);
> void shmob_drm_plane_setup(struct drm_plane *plane);
>
> #endif /* __SHMOB_DRM_PLANE_H__ */
--
Regards,
Laurent Pinchart
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