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Date: Tue, 12 Oct 2021 10:21:20 +0300
From: Tomi Valkeinen <tomi.valkeinen@...asonboard.com>
To: Neil Armstrong <narmstrong@...libre.com>
Cc: linux-omap@...r.kernel.org, dri-devel@...ts.freedesktop.org,
linux-kernel@...r.kernel.org, khilman@...libre.com,
Benoit Parrot <bparrot@...com>
Subject: Re: [PATCH v5 1/8] drm/omap: Add ability to check if requested plane
modes can be supported
Hi,
On 23/09/2021 10:06, Neil Armstrong wrote:
> From: Benoit Parrot <bparrot@...com>
>
> We currently assume that an overlay has the same maximum width and
> maximum height as the overlay manager. This assumption is incorrect. On
> some variants the overlay manager maximum width is twice the maximum
> width that the overlay can handle. We need to add the appropriate data
> per variant as well as export a helper function to retrieve the data so
> check can be made dynamically in omap_plane_atomic_check().
>
> Signed-off-by: Benoit Parrot <bparrot@...com>
> Signed-off-by: Neil Armstrong <narmstrong@...libre.com>
> ---
> drivers/gpu/drm/omapdrm/dss/dispc.c | 22 ++++++++++++++++++++++
> drivers/gpu/drm/omapdrm/dss/dss.h | 2 ++
> drivers/gpu/drm/omapdrm/omap_plane.c | 14 ++++++++++++++
> 3 files changed, 38 insertions(+)
>
> diff --git a/drivers/gpu/drm/omapdrm/dss/dispc.c b/drivers/gpu/drm/omapdrm/dss/dispc.c
> index 3c4a4991e45a..bdecec8f4d88 100644
> --- a/drivers/gpu/drm/omapdrm/dss/dispc.c
> +++ b/drivers/gpu/drm/omapdrm/dss/dispc.c
> @@ -92,6 +92,8 @@ struct dispc_features {
> u8 mgr_height_start;
> u16 mgr_width_max;
> u16 mgr_height_max;
> + u16 ovl_width_max;
> + u16 ovl_height_max;
> unsigned long max_lcd_pclk;
> unsigned long max_tv_pclk;
> unsigned int max_downscale;
> @@ -2599,6 +2601,12 @@ static int dispc_ovl_calc_scaling(struct dispc_device *dispc,
> return 0;
> }
>
> +void dispc_ovl_get_max_size(struct dispc_device *dispc, u16 *width, u16 *height)
> +{
> + *width = dispc->feat->ovl_width_max;
> + *height = dispc->feat->ovl_height_max;
> +}
> +
> static int dispc_ovl_setup_common(struct dispc_device *dispc,
> enum omap_plane_id plane,
> enum omap_overlay_caps caps,
> @@ -4240,6 +4248,8 @@ static const struct dispc_features omap24xx_dispc_feats = {
> .mgr_height_start = 26,
> .mgr_width_max = 2048,
> .mgr_height_max = 2048,
> + .ovl_width_max = 2048,
> + .ovl_height_max = 2048,
> .max_lcd_pclk = 66500000,
> .max_downscale = 2,
> /*
> @@ -4278,6 +4288,8 @@ static const struct dispc_features omap34xx_rev1_0_dispc_feats = {
> .mgr_height_start = 26,
> .mgr_width_max = 2048,
> .mgr_height_max = 2048,
> + .ovl_width_max = 2048,
> + .ovl_height_max = 2048,
> .max_lcd_pclk = 173000000,
> .max_tv_pclk = 59000000,
> .max_downscale = 4,
> @@ -4313,6 +4325,8 @@ static const struct dispc_features omap34xx_rev3_0_dispc_feats = {
> .mgr_height_start = 26,
> .mgr_width_max = 2048,
> .mgr_height_max = 2048,
> + .ovl_width_max = 2048,
> + .ovl_height_max = 2048,
> .max_lcd_pclk = 173000000,
> .max_tv_pclk = 59000000,
> .max_downscale = 4,
> @@ -4348,6 +4362,8 @@ static const struct dispc_features omap36xx_dispc_feats = {
> .mgr_height_start = 26,
> .mgr_width_max = 2048,
> .mgr_height_max = 2048,
> + .ovl_width_max = 2048,
> + .ovl_height_max = 2048,
> .max_lcd_pclk = 173000000,
> .max_tv_pclk = 59000000,
> .max_downscale = 4,
> @@ -4383,6 +4399,8 @@ static const struct dispc_features am43xx_dispc_feats = {
> .mgr_height_start = 26,
> .mgr_width_max = 2048,
> .mgr_height_max = 2048,
> + .ovl_width_max = 2048,
> + .ovl_height_max = 2048,
> .max_lcd_pclk = 173000000,
> .max_tv_pclk = 59000000,
> .max_downscale = 4,
> @@ -4418,6 +4436,8 @@ static const struct dispc_features omap44xx_dispc_feats = {
> .mgr_height_start = 26,
> .mgr_width_max = 2048,
> .mgr_height_max = 2048,
> + .ovl_width_max = 2048,
> + .ovl_height_max = 2048,
> .max_lcd_pclk = 170000000,
> .max_tv_pclk = 185625000,
> .max_downscale = 4,
> @@ -4457,6 +4477,8 @@ static const struct dispc_features omap54xx_dispc_feats = {
> .mgr_height_start = 27,
> .mgr_width_max = 4096,
> .mgr_height_max = 4096,
> + .ovl_width_max = 2048,
> + .ovl_height_max = 4096,
> .max_lcd_pclk = 170000000,
> .max_tv_pclk = 192000000,
> .max_downscale = 4,
> diff --git a/drivers/gpu/drm/omapdrm/dss/dss.h b/drivers/gpu/drm/omapdrm/dss/dss.h
> index a547527bb2f3..14c39f7c3988 100644
> --- a/drivers/gpu/drm/omapdrm/dss/dss.h
> +++ b/drivers/gpu/drm/omapdrm/dss/dss.h
> @@ -397,6 +397,8 @@ int dispc_get_num_mgrs(struct dispc_device *dispc);
> const u32 *dispc_ovl_get_color_modes(struct dispc_device *dispc,
> enum omap_plane_id plane);
>
> +void dispc_ovl_get_max_size(struct dispc_device *dispc, u16 *width, u16 *height);
> +
> u32 dispc_read_irqstatus(struct dispc_device *dispc);
> void dispc_clear_irqstatus(struct dispc_device *dispc, u32 mask);
> void dispc_write_irqenable(struct dispc_device *dispc, u32 mask);
> diff --git a/drivers/gpu/drm/omapdrm/omap_plane.c b/drivers/gpu/drm/omapdrm/omap_plane.c
> index 512af976b7e9..d0a67b7ed1a0 100644
> --- a/drivers/gpu/drm/omapdrm/omap_plane.c
> +++ b/drivers/gpu/drm/omapdrm/omap_plane.c
> @@ -109,11 +109,18 @@ static int omap_plane_atomic_check(struct drm_plane *plane,
> {
> struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state,
> plane);
> + struct omap_drm_private *priv = plane->dev->dev_private;
> struct drm_crtc_state *crtc_state;
> + u16 width, height;
> + u32 width_fp, height_fp;
I think naming these max_w/max_width etc. would be better.
Tomi
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