[PATCH 4.19.y-cip 09/17] drm: rcar-du: lvds: Get mode from state


Biju Das <biju.das.jz@...>
 

From: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>

commit 593885b085d699c9f49992c3ea50f372e0c7008d upstream.

The R-Car LVDS encoder driver implements the bridge .mode_set()
operation for the sole purpose of storing the mode in the LVDS private
data, to be used later when enabling the encoder.

Switch to the bridge .atomic_enable() and .atomic_disable() operations
in order to access the global atomic state, and get the mode from the
state instead. Remove both the unneeded .mode_set() operation and the
display_mode and mode fields storing state data from the rcar_lvds
private structure.

As a side effect we get the CRTC from the state, replace the CRTC
pointer retrieved through the bridge's encoder that shouldn't be used by
atomic drivers.

While at it, clarify a few error messages in rcar_lvds_get_lvds_mode()
and turn them into warnings as they are not fatal.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Reviewed-by: Fabrizio Castro <fabrizio.castro@bp.renesas.com>
Tested-by: Fabrizio Castro <fabrizio.castro@bp.renesas.com>
Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
---
drivers/gpu/drm/rcar-du/rcar_lvds.c | 140 +++++++++++++++-------------
1 file changed, 74 insertions(+), 66 deletions(-)

diff --git a/drivers/gpu/drm/rcar-du/rcar_lvds.c b/drivers/gpu/drm/rcar-du/rcar_lvds.c
index 2558067efe22..aa07af7d944f 100644
--- a/drivers/gpu/drm/rcar-du/rcar_lvds.c
+++ b/drivers/gpu/drm/rcar-du/rcar_lvds.c
@@ -63,9 +63,6 @@ struct rcar_lvds {
struct clk *dotclkin[2]; /* External DU clocks */
} clocks;

- struct drm_display_mode display_mode;
- enum rcar_lvds_mode mode;
-
struct drm_bridge *companion;
bool dual_link;
};
@@ -398,10 +395,53 @@ EXPORT_SYMBOL_GPL(rcar_lvds_clk_disable);
* Bridge
*/

-static void rcar_lvds_enable(struct drm_bridge *bridge)
+static enum rcar_lvds_mode rcar_lvds_get_lvds_mode(struct rcar_lvds *lvds,
+ const struct drm_connector *connector)
+{
+ const struct drm_display_info *info;
+ enum rcar_lvds_mode mode;
+
+ /*
+ * There is no API yet to retrieve LVDS mode from a bridge, only panels
+ * are supported.
+ */
+ if (!lvds->panel)
+ return RCAR_LVDS_MODE_JEIDA;
+
+ info = &connector->display_info;
+ if (!info->num_bus_formats || !info->bus_formats) {
+ dev_warn(lvds->dev,
+ "no LVDS bus format reported, using JEIDA\n");
+ return RCAR_LVDS_MODE_JEIDA;
+ }
+
+ switch (info->bus_formats[0]) {
+ case MEDIA_BUS_FMT_RGB666_1X7X3_SPWG:
+ case MEDIA_BUS_FMT_RGB888_1X7X4_JEIDA:
+ mode = RCAR_LVDS_MODE_JEIDA;
+ break;
+ case MEDIA_BUS_FMT_RGB888_1X7X4_SPWG:
+ mode = RCAR_LVDS_MODE_VESA;
+ break;
+ default:
+ dev_warn(lvds->dev,
+ "unsupported LVDS bus format 0x%04x, using JEIDA\n",
+ info->bus_formats[0]);
+ return RCAR_LVDS_MODE_JEIDA;
+ }
+
+ if (info->bus_flags & DRM_BUS_FLAG_DATA_LSB_TO_MSB)
+ mode |= RCAR_LVDS_MODE_MIRROR;
+
+ return mode;
+}
+
+static void __rcar_lvds_atomic_enable(struct drm_bridge *bridge,
+ struct drm_atomic_state *state,
+ struct drm_crtc *crtc,
+ struct drm_connector *connector)
{
struct rcar_lvds *lvds = bridge_to_rcar_lvds(bridge);
- const struct drm_display_mode *mode = &lvds->display_mode;
u32 lvdhcr;
u32 lvdcr0;
int ret;
@@ -412,7 +452,8 @@ static void rcar_lvds_enable(struct drm_bridge *bridge)

/* Enable the companion LVDS encoder in dual-link mode. */
if (lvds->dual_link && lvds->companion)
- lvds->companion->funcs->enable(lvds->companion);
+ __rcar_lvds_atomic_enable(lvds->companion, state, crtc,
+ connector);

/*
* Hardcode the channels and control signals routing for now.
@@ -448,18 +489,20 @@ static void rcar_lvds_enable(struct drm_bridge *bridge)
* PLL clock configuration on all instances but the companion in
* dual-link mode.
*/
- if (!lvds->dual_link || lvds->companion)
+ if (!lvds->dual_link || lvds->companion) {
+ const struct drm_crtc_state *crtc_state =
+ drm_atomic_get_new_crtc_state(state, crtc);
+ const struct drm_display_mode *mode =
+ &crtc_state->adjusted_mode;
+
lvds->info->pll_setup(lvds, mode->clock * 1000);
+ }

/* Set the LVDS mode and select the input. */
- lvdcr0 = lvds->mode << LVDCR0_LVMD_SHIFT;
+ lvdcr0 = rcar_lvds_get_lvds_mode(lvds, connector) << LVDCR0_LVMD_SHIFT;

if (lvds->bridge.encoder) {
- /*
- * FIXME: We should really retrieve the CRTC through the state,
- * but how do we get a state pointer?
- */
- if (drm_crtc_index(lvds->bridge.encoder->crtc) == 2)
+ if (drm_crtc_index(crtc) == 2)
lvdcr0 |= LVDCR0_DUSEL;
}

@@ -512,7 +555,21 @@ static void rcar_lvds_enable(struct drm_bridge *bridge)
}
}

-static void rcar_lvds_disable(struct drm_bridge *bridge)
+static void rcar_lvds_atomic_enable(struct drm_bridge *bridge,
+ struct drm_atomic_state *state)
+{
+ struct drm_connector *connector;
+ struct drm_crtc *crtc;
+
+ connector = drm_atomic_get_new_connector_for_encoder(state,
+ bridge->encoder);
+ crtc = drm_atomic_get_new_connector_state(state, connector)->crtc;
+
+ __rcar_lvds_atomic_enable(bridge, state, crtc, connector);
+}
+
+static void rcar_lvds_atomic_disable(struct drm_bridge *bridge,
+ struct drm_atomic_state *state)
{
struct rcar_lvds *lvds = bridge_to_rcar_lvds(bridge);

@@ -527,7 +584,7 @@ static void rcar_lvds_disable(struct drm_bridge *bridge)

/* Disable the companion LVDS encoder in dual-link mode. */
if (lvds->dual_link && lvds->companion)
- lvds->companion->funcs->disable(lvds->companion);
+ lvds->companion->funcs->atomic_disable(lvds->companion, state);

clk_disable_unprepare(lvds->clocks.mod);
}
@@ -550,54 +607,6 @@ static bool rcar_lvds_mode_fixup(struct drm_bridge *bridge,
return true;
}

-static void rcar_lvds_get_lvds_mode(struct rcar_lvds *lvds)
-{
- struct drm_display_info *info = &lvds->connector.display_info;
- enum rcar_lvds_mode mode;
-
- /*
- * There is no API yet to retrieve LVDS mode from a bridge, only panels
- * are supported.
- */
- if (!lvds->panel)
- return;
-
- if (!info->num_bus_formats || !info->bus_formats) {
- dev_err(lvds->dev, "no LVDS bus format reported\n");
- return;
- }
-
- switch (info->bus_formats[0]) {
- case MEDIA_BUS_FMT_RGB666_1X7X3_SPWG:
- case MEDIA_BUS_FMT_RGB888_1X7X4_JEIDA:
- mode = RCAR_LVDS_MODE_JEIDA;
- break;
- case MEDIA_BUS_FMT_RGB888_1X7X4_SPWG:
- mode = RCAR_LVDS_MODE_VESA;
- break;
- default:
- dev_err(lvds->dev, "unsupported LVDS bus format 0x%04x\n",
- info->bus_formats[0]);
- return;
- }
-
- if (info->bus_flags & DRM_BUS_FLAG_DATA_LSB_TO_MSB)
- mode |= RCAR_LVDS_MODE_MIRROR;
-
- lvds->mode = mode;
-}
-
-static void rcar_lvds_mode_set(struct drm_bridge *bridge,
- struct drm_display_mode *mode,
- struct drm_display_mode *adjusted_mode)
-{
- struct rcar_lvds *lvds = bridge_to_rcar_lvds(bridge);
-
- lvds->display_mode = *adjusted_mode;
-
- rcar_lvds_get_lvds_mode(lvds);
-}
-
static int rcar_lvds_attach(struct drm_bridge *bridge)
{
struct rcar_lvds *lvds = bridge_to_rcar_lvds(bridge);
@@ -639,10 +648,9 @@ static void rcar_lvds_detach(struct drm_bridge *bridge)
static const struct drm_bridge_funcs rcar_lvds_bridge_ops = {
.attach = rcar_lvds_attach,
.detach = rcar_lvds_detach,
- .enable = rcar_lvds_enable,
- .disable = rcar_lvds_disable,
+ .atomic_enable = rcar_lvds_atomic_enable,
+ .atomic_disable = rcar_lvds_atomic_disable,
.mode_fixup = rcar_lvds_mode_fixup,
- .mode_set = rcar_lvds_mode_set,
};

bool rcar_lvds_dual_link(struct drm_bridge *bridge)
--
2.17.1

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