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Date: Wed, 26 Jun 2024 14:09:22 +0300
From: Tomi Valkeinen <tomi.valkeinen@...asonboard.com>
To: Aradhya Bhatia <a-bhatia1@...com>,
Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
Andrzej Hajda <andrzej.hajda@...el.com>,
Neil Armstrong <neil.armstrong@...aro.org>, Robert Foss <rfoss@...nel.org>,
Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
Jonas Karlman <jonas@...boo.se>, Jernej Skrabec <jernej.skrabec@...il.com>,
Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
Maxime Ripard <mripard@...nel.org>, Jyri Sarha <jyri.sarha@....fi>,
Thomas Zimmermann <tzimmermann@...e.de>, David Airlie <airlied@...il.com>,
Daniel Vetter <daniel@...ll.ch>
Cc: DRI Development List <dri-devel@...ts.freedesktop.org>,
Linux Kernel List <linux-kernel@...r.kernel.org>,
Dominik Haller <d.haller@...tec.de>, Sam Ravnborg <sam@...nborg.org>,
Thierry Reding <treding@...dia.com>,
Kieran Bingham <kieran.bingham+renesas@...asonboard.com>,
Nishanth Menon <nm@...com>, Vignesh Raghavendra <vigneshr@...com>,
Praneeth Bajjuri <praneeth@...com>, Udit Kumar <u-kumar1@...com>,
Devarsh Thakkar <devarsht@...com>, Jayesh Choudhary <j-choudhary@...com>,
Jai Luthra <j-luthra@...com>
Subject: Re: [PATCH v4 09/11] drm/bridge: cdns-dsi: Support atomic bridge APIs
On 22/06/2024 14:09, Aradhya Bhatia wrote:
> Change the existing (and deprecated) bridge hooks, to the bridge
> atomic APIs.
>
> Add drm helpers for duplicate_state, destroy_state, and bridge_reset
> bridge hooks.
>
> Further add support for the input format negotiation hook.
>
> Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
> Signed-off-by: Aradhya Bhatia <a-bhatia1@...com>
Reviewed-by: Tomi Valkeinen <tomi.valkeinen@...asonboard.com>
Tomi
> ---
> .../gpu/drm/bridge/cadence/cdns-dsi-core.c | 51 ++++++++++++++++---
> 1 file changed, 43 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/gpu/drm/bridge/cadence/cdns-dsi-core.c b/drivers/gpu/drm/bridge/cadence/cdns-dsi-core.c
> index cad0c1478ef0..c9697818308e 100644
> --- a/drivers/gpu/drm/bridge/cadence/cdns-dsi-core.c
> +++ b/drivers/gpu/drm/bridge/cadence/cdns-dsi-core.c
> @@ -655,7 +655,8 @@ cdns_dsi_bridge_mode_valid(struct drm_bridge *bridge,
> return MODE_OK;
> }
>
> -static void cdns_dsi_bridge_disable(struct drm_bridge *bridge)
> +static void cdns_dsi_bridge_atomic_disable(struct drm_bridge *bridge,
> + struct drm_bridge_state *old_bridge_state)
> {
> struct cdns_dsi_input *input = bridge_to_cdns_dsi_input(bridge);
> struct cdns_dsi *dsi = input_to_dsi(input);
> @@ -679,7 +680,8 @@ static void cdns_dsi_bridge_disable(struct drm_bridge *bridge)
> pm_runtime_put(dsi->base.dev);
> }
>
> -static void cdns_dsi_bridge_post_disable(struct drm_bridge *bridge)
> +static void cdns_dsi_bridge_atomic_post_disable(struct drm_bridge *bridge,
> + struct drm_bridge_state *old_bridge_state)
> {
> struct cdns_dsi_input *input = bridge_to_cdns_dsi_input(bridge);
> struct cdns_dsi *dsi = input_to_dsi(input);
> @@ -755,7 +757,8 @@ static void cdns_dsi_init_link(struct cdns_dsi *dsi)
> dsi->link_initialized = true;
> }
>
> -static void cdns_dsi_bridge_enable(struct drm_bridge *bridge)
> +static void cdns_dsi_bridge_atomic_enable(struct drm_bridge *bridge,
> + struct drm_bridge_state *old_bridge_state)
> {
> struct cdns_dsi_input *input = bridge_to_cdns_dsi_input(bridge);
> struct cdns_dsi *dsi = input_to_dsi(input);
> @@ -906,7 +909,8 @@ static void cdns_dsi_bridge_enable(struct drm_bridge *bridge)
> writel(tmp, dsi->regs + MCTL_MAIN_EN);
> }
>
> -static void cdns_dsi_bridge_pre_enable(struct drm_bridge *bridge)
> +static void cdns_dsi_bridge_atomic_pre_enable(struct drm_bridge *bridge,
> + struct drm_bridge_state *old_bridge_state)
> {
> struct cdns_dsi_input *input = bridge_to_cdns_dsi_input(bridge);
> struct cdns_dsi *dsi = input_to_dsi(input);
> @@ -918,13 +922,44 @@ static void cdns_dsi_bridge_pre_enable(struct drm_bridge *bridge)
> cdns_dsi_hs_init(dsi);
> }
>
> +static u32 *cdns_dsi_bridge_get_input_bus_fmts(struct drm_bridge *bridge,
> + struct drm_bridge_state *bridge_state,
> + struct drm_crtc_state *crtc_state,
> + struct drm_connector_state *conn_state,
> + u32 output_fmt,
> + unsigned int *num_input_fmts)
> +{
> + struct cdns_dsi_input *input = bridge_to_cdns_dsi_input(bridge);
> + struct cdns_dsi *dsi = input_to_dsi(input);
> + struct cdns_dsi_output *output = &dsi->output;
> + u32 *input_fmts;
> +
> + *num_input_fmts = 0;
> +
> + input_fmts = kzalloc(sizeof(*input_fmts), GFP_KERNEL);
> + if (!input_fmts)
> + return NULL;
> +
> + input_fmts[0] = drm_mipi_dsi_get_input_bus_fmt(output->dev->format);
> + if (!input_fmts[0])
> + return NULL;
> +
> + *num_input_fmts = 1;
> +
> + return input_fmts;
> +}
> +
> static const struct drm_bridge_funcs cdns_dsi_bridge_funcs = {
> .attach = cdns_dsi_bridge_attach,
> .mode_valid = cdns_dsi_bridge_mode_valid,
> - .disable = cdns_dsi_bridge_disable,
> - .pre_enable = cdns_dsi_bridge_pre_enable,
> - .enable = cdns_dsi_bridge_enable,
> - .post_disable = cdns_dsi_bridge_post_disable,
> + .atomic_disable = cdns_dsi_bridge_atomic_disable,
> + .atomic_pre_enable = cdns_dsi_bridge_atomic_pre_enable,
> + .atomic_enable = cdns_dsi_bridge_atomic_enable,
> + .atomic_post_disable = cdns_dsi_bridge_atomic_post_disable,
> + .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
> + .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
> + .atomic_reset = drm_atomic_helper_bridge_reset,
> + .atomic_get_input_bus_fmts = cdns_dsi_bridge_get_input_bus_fmts,
> };
>
> static int cdns_dsi_attach(struct mipi_dsi_host *host,
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