From: Maciej Purski Date: Thu, 24 Aug 2017 08:58:07 +0000 (+0200) Subject: drm/bridge/sii8620: add remote control support X-Git-Tag: v4.15-rc1~90^2~37^2~3 X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=e25f1f7c94e16d4493398300efa03e5b6c77fcbf;p=linux.git drm/bridge/sii8620: add remote control support MHL specification defines Remote Control Protocol(RCP) to send input events between MHL devices. The driver now recognizes RCP messages and reacts to them by reporting key events to input subsystem, allowing a user to control a device using TV remote control. Signed-off-by: Maciej Purski Acked-by: Sean Young Acked-by: Mauro Carvalho Chehab Signed-off-by: Andrzej Hajda Link: https://patchwork.freedesktop.org/patch/msgid/1503565087-19730-1-git-send-email-m.purski@samsung.com --- diff --git a/drivers/gpu/drm/bridge/Kconfig b/drivers/gpu/drm/bridge/Kconfig index 9dba16fd56c3..3b99d5a06c16 100644 --- a/drivers/gpu/drm/bridge/Kconfig +++ b/drivers/gpu/drm/bridge/Kconfig @@ -71,7 +71,7 @@ config DRM_PARADE_PS8622 config DRM_SIL_SII8620 tristate "Silicon Image SII8620 HDMI/MHL bridge" - depends on OF + depends on OF && RC_CORE select DRM_KMS_HELPER help Silicon Image SII8620 HDMI/MHL bridge chip driver. diff --git a/drivers/gpu/drm/bridge/sil-sii8620.c b/drivers/gpu/drm/bridge/sil-sii8620.c index 5131bfb94f06..b7eb704d0a8a 100644 --- a/drivers/gpu/drm/bridge/sil-sii8620.c +++ b/drivers/gpu/drm/bridge/sil-sii8620.c @@ -28,6 +28,8 @@ #include #include +#include + #include "sil-sii8620.h" #define SII8620_BURST_BUF_LEN 288 @@ -58,6 +60,7 @@ enum sii8620_mt_state { struct sii8620 { struct drm_bridge bridge; struct device *dev; + struct rc_dev *rc_dev; struct clk *clk_xtal; struct gpio_desc *gpio_reset; struct gpio_desc *gpio_int; @@ -431,6 +434,16 @@ static void sii8620_mt_rap(struct sii8620 *ctx, u8 code) sii8620_mt_msc_msg(ctx, MHL_MSC_MSG_RAP, code); } +static void sii8620_mt_rcpk(struct sii8620 *ctx, u8 code) +{ + sii8620_mt_msc_msg(ctx, MHL_MSC_MSG_RCPK, code); +} + +static void sii8620_mt_rcpe(struct sii8620 *ctx, u8 code) +{ + sii8620_mt_msc_msg(ctx, MHL_MSC_MSG_RCPE, code); +} + static void sii8620_mt_read_devcap_send(struct sii8620 *ctx, struct sii8620_mt_msg *msg) { @@ -1753,6 +1766,25 @@ static void sii8620_send_features(struct sii8620 *ctx) sii8620_write_buf(ctx, REG_MDT_XMIT_WRITE_PORT, buf, ARRAY_SIZE(buf)); } +static bool sii8620_rcp_consume(struct sii8620 *ctx, u8 scancode) +{ + bool pressed = !(scancode & MHL_RCP_KEY_RELEASED_MASK); + + scancode &= MHL_RCP_KEY_ID_MASK; + + if (!ctx->rc_dev) { + dev_dbg(ctx->dev, "RCP input device not initialized\n"); + return false; + } + + if (pressed) + rc_keydown(ctx->rc_dev, RC_PROTO_CEC, scancode, 0); + else + rc_keyup(ctx->rc_dev); + + return true; +} + static void sii8620_msc_mr_set_int(struct sii8620 *ctx) { u8 ints[MHL_INT_SIZE]; @@ -1804,19 +1836,25 @@ static void sii8620_msc_mt_done(struct sii8620 *ctx) static void sii8620_msc_mr_msc_msg(struct sii8620 *ctx) { - struct sii8620_mt_msg *msg = sii8620_msc_msg_first(ctx); + struct sii8620_mt_msg *msg; u8 buf[2]; - if (!msg) - return; - sii8620_read_buf(ctx, REG_MSC_MR_MSC_MSG_RCVD_1ST_DATA, buf, 2); switch (buf[0]) { case MHL_MSC_MSG_RAPK: + msg = sii8620_msc_msg_first(ctx); + if (!msg) + return; msg->ret = buf[1]; ctx->mt_state = MT_STATE_DONE; break; + case MHL_MSC_MSG_RCP: + if (!sii8620_rcp_consume(ctx, buf[1])) + sii8620_mt_rcpe(ctx, + MHL_RCPE_STATUS_INEFFECTIVE_KEY_CODE); + sii8620_mt_rcpk(ctx, buf[1]); + break; default: dev_err(ctx->dev, "%s message type %d,%d not supported", __func__, buf[0], buf[1]); @@ -2102,11 +2140,57 @@ static void sii8620_cable_in(struct sii8620 *ctx) enable_irq(to_i2c_client(ctx->dev)->irq); } +static void sii8620_init_rcp_input_dev(struct sii8620 *ctx) +{ + struct rc_dev *rc_dev; + int ret; + + rc_dev = rc_allocate_device(RC_DRIVER_SCANCODE); + if (!rc_dev) { + dev_err(ctx->dev, "Failed to allocate RC device\n"); + ctx->error = -ENOMEM; + return; + } + + rc_dev->input_phys = "sii8620/input0"; + rc_dev->input_id.bustype = BUS_VIRTUAL; + rc_dev->map_name = RC_MAP_CEC; + rc_dev->allowed_protocols = RC_PROTO_BIT_CEC; + rc_dev->driver_name = "sii8620"; + rc_dev->device_name = "sii8620"; + + ret = rc_register_device(rc_dev); + + if (ret) { + dev_err(ctx->dev, "Failed to register RC device\n"); + ctx->error = ret; + rc_free_device(ctx->rc_dev); + return; + } + ctx->rc_dev = rc_dev; +} + static inline struct sii8620 *bridge_to_sii8620(struct drm_bridge *bridge) { return container_of(bridge, struct sii8620, bridge); } +static int sii8620_attach(struct drm_bridge *bridge) +{ + struct sii8620 *ctx = bridge_to_sii8620(bridge); + + sii8620_init_rcp_input_dev(ctx); + + return sii8620_clear_error(ctx); +} + +static void sii8620_detach(struct drm_bridge *bridge) +{ + struct sii8620 *ctx = bridge_to_sii8620(bridge); + + rc_unregister_device(ctx->rc_dev); +} + static bool sii8620_mode_fixup(struct drm_bridge *bridge, const struct drm_display_mode *mode, struct drm_display_mode *adjusted_mode) @@ -2151,6 +2235,8 @@ static bool sii8620_mode_fixup(struct drm_bridge *bridge, } static const struct drm_bridge_funcs sii8620_bridge_funcs = { + .attach = sii8620_attach, + .detach = sii8620_detach, .mode_fixup = sii8620_mode_fixup, }; @@ -2217,8 +2303,8 @@ static int sii8620_remove(struct i2c_client *client) struct sii8620 *ctx = i2c_get_clientdata(client); disable_irq(to_i2c_client(ctx->dev)->irq); - drm_bridge_remove(&ctx->bridge); sii8620_hw_off(ctx); + drm_bridge_remove(&ctx->bridge); return 0; } diff --git a/include/drm/bridge/mhl.h b/include/drm/bridge/mhl.h index fbdfc8d7f3c7..96a5e0f6ff12 100644 --- a/include/drm/bridge/mhl.h +++ b/include/drm/bridge/mhl.h @@ -262,6 +262,10 @@ enum { #define MHL_RAPK_UNSUPPORTED 0x02 /* Rcvd RAP action code not supported */ #define MHL_RAPK_BUSY 0x03 /* Responder too busy to respond */ +/* Bit masks for RCP messages */ +#define MHL_RCP_KEY_RELEASED_MASK 0x80 +#define MHL_RCP_KEY_ID_MASK 0x7F + /* * Error status codes for RCPE messages */