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Date: Mon, 5 Nov 2018 13:53:03 +0100
From: Neil Armstrong <narmstrong@...libre.com>
To: Maxime Jourdan <mjourdan@...libre.com>
Cc: Kevin Hilman <khilman@...libre.com>,
Jerome Brunet <jbrunet@...libre.com>,
devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org,
linux-amlogic@...ts.infradead.org, dri-devel@...ts.freedesktop.org
Subject: Re: [PATCH 2/2] drm/meson: Use optional canvas provider
On 05/11/2018 11:45, Maxime Jourdan wrote:
> This is the first step into converting the meson/drm driver to use
> the canvas module.
>
> If a canvas provider node is detected in DT, use it. Otherwise,
> fall back to what is currently being done.
>
> Signed-off-by: Maxime Jourdan <mjourdan@...libre.com>
> ---
> drivers/gpu/drm/meson/Kconfig | 1 +
> drivers/gpu/drm/meson/meson_crtc.c | 14 ++++++---
> drivers/gpu/drm/meson/meson_drv.c | 46 ++++++++++++++++++-----------
> drivers/gpu/drm/meson/meson_drv.h | 4 +++
> drivers/gpu/drm/meson/meson_plane.c | 8 ++++-
> 5 files changed, 51 insertions(+), 22 deletions(-)
>
> diff --git a/drivers/gpu/drm/meson/Kconfig b/drivers/gpu/drm/meson/Kconfig
> index 3ce51d8dfe1c..c28b69f48555 100644
> --- a/drivers/gpu/drm/meson/Kconfig
> +++ b/drivers/gpu/drm/meson/Kconfig
> @@ -7,6 +7,7 @@ config DRM_MESON
> select DRM_GEM_CMA_HELPER
> select VIDEOMODE_HELPERS
> select REGMAP_MMIO
> + select MESON_CANVAS
>
> config DRM_MESON_DW_HDMI
> tristate "HDMI Synopsys Controller support for Amlogic Meson Display"
> diff --git a/drivers/gpu/drm/meson/meson_crtc.c b/drivers/gpu/drm/meson/meson_crtc.c
> index 05520202c967..b3bc0b0ee07f 100644
> --- a/drivers/gpu/drm/meson/meson_crtc.c
> +++ b/drivers/gpu/drm/meson/meson_crtc.c
> @@ -193,10 +193,16 @@ void meson_crtc_irq(struct meson_drm *priv)
> } else
> meson_vpp_disable_interlace_vscaler_osd1(priv);
>
> - meson_canvas_setup(priv, MESON_CANVAS_ID_OSD1,
> - priv->viu.osd1_addr, priv->viu.osd1_stride,
> - priv->viu.osd1_height, MESON_CANVAS_WRAP_NONE,
> - MESON_CANVAS_BLKMODE_LINEAR);
> + if (priv->canvas)
> + meson_canvas_config(priv->canvas, priv->canvas_id_osd1,
> + priv->viu.osd1_addr, priv->viu.osd1_stride,
> + priv->viu.osd1_height, MESON_CANVAS_WRAP_NONE,
> + MESON_CANVAS_BLKMODE_LINEAR, 0);
> + else
> + meson_canvas_setup(priv, MESON_CANVAS_ID_OSD1,
> + priv->viu.osd1_addr, priv->viu.osd1_stride,
> + priv->viu.osd1_height, MESON_CANVAS_WRAP_NONE,
> + MESON_CANVAS_BLKMODE_LINEAR);
>
> /* Enable OSD1 */
> writel_bits_relaxed(VPP_OSD1_POSTBLEND, VPP_OSD1_POSTBLEND,
> diff --git a/drivers/gpu/drm/meson/meson_drv.c b/drivers/gpu/drm/meson/meson_drv.c
> index d3443125e661..b39c38c2350d 100644
> --- a/drivers/gpu/drm/meson/meson_drv.c
> +++ b/drivers/gpu/drm/meson/meson_drv.c
> @@ -216,24 +216,33 @@ static int meson_drv_bind_master(struct device *dev, bool has_components)
> goto free_drm;
> }
>
> - res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dmc");
> - if (!res) {
> - ret = -EINVAL;
> - goto free_drm;
> - }
> - /* Simply ioremap since it may be a shared register zone */
> - regs = devm_ioremap(dev, res->start, resource_size(res));
> - if (!regs) {
> - ret = -EADDRNOTAVAIL;
> - goto free_drm;
> - }
> + priv->canvas = meson_canvas_get(dev);
> + if (!IS_ERR(priv->canvas)) {
> + ret = meson_canvas_alloc(priv->canvas, &priv->canvas_id_osd1);
> + if (ret)
> + goto free_drm;
> + } else {
> + priv->canvas = NULL;
>
> - priv->dmc = devm_regmap_init_mmio(dev, regs,
> - &meson_regmap_config);
> - if (IS_ERR(priv->dmc)) {
> - dev_err(&pdev->dev, "Couldn't create the DMC regmap\n");
> - ret = PTR_ERR(priv->dmc);
> - goto free_drm;
> + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dmc");
> + if (!res) {
> + ret = -EINVAL;
> + goto free_drm;
> + }
> + /* Simply ioremap since it may be a shared register zone */
> + regs = devm_ioremap(dev, res->start, resource_size(res));
> + if (!regs) {
> + ret = -EADDRNOTAVAIL;
> + goto free_drm;
> + }
> +
> + priv->dmc = devm_regmap_init_mmio(dev, regs,
> + &meson_regmap_config);
> + if (IS_ERR(priv->dmc)) {
> + dev_err(&pdev->dev, "Couldn't create the DMC regmap\n");
> + ret = PTR_ERR(priv->dmc);
> + goto free_drm;
> + }
> }
>
> priv->vsync_irq = platform_get_irq(pdev, 0);
> @@ -315,6 +324,9 @@ static void meson_drv_unbind(struct device *dev)
> struct drm_device *drm = dev_get_drvdata(dev);
> struct meson_drm *priv = drm->dev_private;
>
> + if (priv->canvas)
> + meson_canvas_free(priv->canvas, priv->canvas_id_osd1);
> +
> drm_dev_unregister(drm);
> drm_kms_helper_poll_fini(drm);
> drm_fbdev_cma_fini(priv->fbdev);
> diff --git a/drivers/gpu/drm/meson/meson_drv.h b/drivers/gpu/drm/meson/meson_drv.h
> index 8450d6ac8c9b..728d0ca33732 100644
> --- a/drivers/gpu/drm/meson/meson_drv.h
> +++ b/drivers/gpu/drm/meson/meson_drv.h
> @@ -22,6 +22,7 @@
> #include <linux/platform_device.h>
> #include <linux/regmap.h>
> #include <linux/of.h>
> +#include <linux/soc/amlogic/meson-canvas.h>
> #include <drm/drmP.h>
>
> struct meson_drm {
> @@ -31,6 +32,9 @@ struct meson_drm {
> struct regmap *dmc;
> int vsync_irq;
>
> + struct meson_canvas *canvas;
> + u8 canvas_id_osd1;
> +
> struct drm_device *drm;
> struct drm_crtc *crtc;
> struct drm_fbdev_cma *fbdev;
> diff --git a/drivers/gpu/drm/meson/meson_plane.c b/drivers/gpu/drm/meson/meson_plane.c
> index 12c80dfcff59..51bec8e98a39 100644
> --- a/drivers/gpu/drm/meson/meson_plane.c
> +++ b/drivers/gpu/drm/meson/meson_plane.c
> @@ -90,6 +90,7 @@ static void meson_plane_atomic_update(struct drm_plane *plane,
> .y2 = state->crtc_y + state->crtc_h,
> };
> unsigned long flags;
> + u8 canvas_id_osd1;
>
> /*
> * Update Coordinates
> @@ -104,8 +105,13 @@ static void meson_plane_atomic_update(struct drm_plane *plane,
> (0xFF << OSD_GLOBAL_ALPHA_SHIFT) |
> OSD_BLK0_ENABLE;
>
> + if (priv->canvas)
> + canvas_id_osd1 = priv->canvas_id_osd1;
> + else
> + canvas_id_osd1 = MESON_CANVAS_ID_OSD1;
> +
> /* Set up BLK0 to point to the right canvas */
> - priv->viu.osd1_blk0_cfg[0] = ((MESON_CANVAS_ID_OSD1 << OSD_CANVAS_SEL) |
> + priv->viu.osd1_blk0_cfg[0] = ((canvas_id_osd1 << OSD_CANVAS_SEL) |
> OSD_ENDIANNESS_LE);
>
> /* On GXBB, Use the old non-HDR RGB2YUV converter */
>
Reviewed-by: Neil Armstrong <narmstrong@...libre.com>
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