From 4151c14cdda689fd64299736f2779668a9fb3a7d Mon Sep 17 00:00:00 2001 From: Sam Ravnborg Date: Mon, 27 Jul 2020 19:03:19 +0200 Subject: drm/bridge: nxp-ptn3460: add get_edid bridge operation Add the get_edid() bridge operation to prepare for use as a chained bridge. Add helper function that is also used by the connector. v2: - Fix memory leak (Laurent) - Do not save a copy of edid, read it when needed Signed-off-by: Sam Ravnborg Reviewed-by: Laurent Pinchart Cc: Andrzej Hajda Cc: Neil Armstrong Cc: Laurent Pinchart Cc: Jonas Karlman Cc: Jernej Skrabec Link: https://patchwork.freedesktop.org/patch/msgid/20200727170320.959777-5-sam@ravnborg.org --- drivers/gpu/drm/bridge/nxp-ptn3460.c | 43 +++++++++++++++++++++--------------- 1 file changed, 25 insertions(+), 18 deletions(-) (limited to 'drivers/gpu/drm/bridge') diff --git a/drivers/gpu/drm/bridge/nxp-ptn3460.c b/drivers/gpu/drm/bridge/nxp-ptn3460.c index 438e566ce0a4..2805c8938f98 100644 --- a/drivers/gpu/drm/bridge/nxp-ptn3460.c +++ b/drivers/gpu/drm/bridge/nxp-ptn3460.c @@ -29,7 +29,6 @@ struct ptn3460_bridge { struct drm_connector connector; struct i2c_client *client; struct drm_bridge bridge; - struct edid *edid; struct drm_panel *panel; struct gpio_desc *gpio_pd_n; struct gpio_desc *gpio_rst_n; @@ -184,17 +183,13 @@ static void ptn3460_post_disable(struct drm_bridge *bridge) } } -static int ptn3460_get_modes(struct drm_connector *connector) +static struct edid *ptn3460_get_edid(struct drm_bridge *bridge, + struct drm_connector *connector) { - struct ptn3460_bridge *ptn_bridge; - u8 *edid; - int ret, num_modes = 0; + struct ptn3460_bridge *ptn_bridge = bridge_to_ptn3460(bridge); bool power_off; - - ptn_bridge = connector_to_ptn3460(connector); - - if (ptn_bridge->edid) - return drm_add_edid_modes(connector, ptn_bridge->edid); + u8 *edid; + int ret; power_off = !ptn_bridge->enabled; ptn3460_pre_enable(&ptn_bridge->bridge); @@ -202,30 +197,40 @@ static int ptn3460_get_modes(struct drm_connector *connector) edid = kmalloc(EDID_LENGTH, GFP_KERNEL); if (!edid) { DRM_ERROR("Failed to allocate EDID\n"); - return 0; + goto out; } ret = ptn3460_read_bytes(ptn_bridge, PTN3460_EDID_ADDR, edid, - EDID_LENGTH); + EDID_LENGTH); if (ret) { kfree(edid); + edid = NULL; goto out; } - ptn_bridge->edid = (struct edid *)edid; - drm_connector_update_edid_property(connector, ptn_bridge->edid); - - num_modes = drm_add_edid_modes(connector, ptn_bridge->edid); - out: if (power_off) ptn3460_disable(&ptn_bridge->bridge); + return (struct edid *)edid; +} + +static int ptn3460_connector_get_modes(struct drm_connector *connector) +{ + struct ptn3460_bridge *ptn_bridge = connector_to_ptn3460(connector); + struct edid *edid; + int num_modes; + + edid = ptn3460_get_edid(&ptn_bridge->bridge, connector); + drm_connector_update_edid_property(connector, edid); + num_modes = drm_add_edid_modes(connector, edid); + kfree(edid); + return num_modes; } static const struct drm_connector_helper_funcs ptn3460_connector_helper_funcs = { - .get_modes = ptn3460_get_modes, + .get_modes = ptn3460_connector_get_modes, }; static const struct drm_connector_funcs ptn3460_connector_funcs = { @@ -279,6 +284,7 @@ static const struct drm_bridge_funcs ptn3460_bridge_funcs = { .disable = ptn3460_disable, .post_disable = ptn3460_post_disable, .attach = ptn3460_bridge_attach, + .get_edid = ptn3460_get_edid, }; static int ptn3460_probe(struct i2c_client *client, @@ -327,6 +333,7 @@ static int ptn3460_probe(struct i2c_client *client, } ptn_bridge->bridge.funcs = &ptn3460_bridge_funcs; + ptn_bridge->bridge.ops = DRM_BRIDGE_OP_EDID; ptn_bridge->bridge.of_node = dev->of_node; drm_bridge_add(&ptn_bridge->bridge); -- cgit v1.2.3