From 0c93a61db462e3fe1a2c63d908549d4e353a56fb Mon Sep 17 00:00:00 2001 From: Sebastian Reichel Date: Tue, 15 Dec 2020 12:45:59 +0200 Subject: [PATCH] drm/omap: dsi: do bus locking in host driver This moves the bus locking into the host driver and unexports the custom API in preparation for drm_panel support. Signed-off-by: Sebastian Reichel Signed-off-by: Tomi Valkeinen Link: https://patchwork.freedesktop.org/patch/msgid/20201215104657.802264-27-tomi.valkeinen@ti.com --- drivers/gpu/drm/omapdrm/displays/panel-dsi-cm.c | 44 +------------------------ drivers/gpu/drm/omapdrm/dss/dsi.c | 41 +++++++++++++++-------- drivers/gpu/drm/omapdrm/dss/omapdss.h | 3 -- 3 files changed, 28 insertions(+), 60 deletions(-) diff --git a/drivers/gpu/drm/omapdrm/displays/panel-dsi-cm.c b/drivers/gpu/drm/omapdrm/displays/panel-dsi-cm.c index a79c95a..efbca64 100644 --- a/drivers/gpu/drm/omapdrm/displays/panel-dsi-cm.c +++ b/drivers/gpu/drm/omapdrm/displays/panel-dsi-cm.c @@ -295,7 +295,6 @@ static int dsicm_wake_up(struct panel_drv_data *ddata) static int dsicm_bl_update_status(struct backlight_device *dev) { struct panel_drv_data *ddata = dev_get_drvdata(&dev->dev); - struct omap_dss_device *src = ddata->src; int r = 0; int level; @@ -310,14 +309,10 @@ static int dsicm_bl_update_status(struct backlight_device *dev) mutex_lock(&ddata->lock); if (ddata->enabled) { - src->ops->dsi.bus_lock(src); - r = dsicm_wake_up(ddata); if (!r) r = dsicm_dcs_write_1( ddata, MIPI_DCS_SET_DISPLAY_BRIGHTNESS, level); - - src->ops->dsi.bus_unlock(src); } mutex_unlock(&ddata->lock); @@ -343,21 +338,16 @@ static ssize_t dsicm_num_errors_show(struct device *dev, struct device_attribute *attr, char *buf) { struct panel_drv_data *ddata = dev_get_drvdata(dev); - struct omap_dss_device *src = ddata->src; u8 errors = 0; int r; mutex_lock(&ddata->lock); if (ddata->enabled) { - src->ops->dsi.bus_lock(src); - r = dsicm_wake_up(ddata); if (!r) r = dsicm_dcs_read_1(ddata, DCS_READ_NUM_ERRORS, &errors); - - src->ops->dsi.bus_unlock(src); } else { r = -ENODEV; } @@ -374,20 +364,15 @@ static ssize_t dsicm_hw_revision_show(struct device *dev, struct device_attribute *attr, char *buf) { struct panel_drv_data *ddata = dev_get_drvdata(dev); - struct omap_dss_device *src = ddata->src; u8 id1, id2, id3; int r; mutex_lock(&ddata->lock); if (ddata->enabled) { - src->ops->dsi.bus_lock(src); - r = dsicm_wake_up(ddata); if (!r) r = dsicm_get_id(ddata, &id1, &id2, &id3); - - src->ops->dsi.bus_unlock(src); } else { r = -ENODEV; } @@ -405,7 +390,6 @@ static ssize_t dsicm_store_ulps(struct device *dev, const char *buf, size_t count) { struct panel_drv_data *ddata = dev_get_drvdata(dev); - struct omap_dss_device *src = ddata->src; unsigned long t; int r; @@ -416,14 +400,10 @@ static ssize_t dsicm_store_ulps(struct device *dev, mutex_lock(&ddata->lock); if (ddata->enabled) { - src->ops->dsi.bus_lock(src); - if (t) r = dsicm_enter_ulps(ddata); else r = dsicm_wake_up(ddata); - - src->ops->dsi.bus_unlock(src); } mutex_unlock(&ddata->lock); @@ -453,7 +433,6 @@ static ssize_t dsicm_store_ulps_timeout(struct device *dev, const char *buf, size_t count) { struct panel_drv_data *ddata = dev_get_drvdata(dev); - struct omap_dss_device *src = ddata->src; unsigned long t; int r; @@ -466,9 +445,7 @@ static ssize_t dsicm_store_ulps_timeout(struct device *dev, if (ddata->enabled) { /* dsicm_wake_up will restart the timer */ - src->ops->dsi.bus_lock(src); r = dsicm_wake_up(ddata); - src->ops->dsi.bus_unlock(src); } mutex_unlock(&ddata->lock); @@ -669,17 +646,11 @@ static void dsicm_disconnect(struct omap_dss_device *src, static void dsicm_enable(struct omap_dss_device *dssdev) { struct panel_drv_data *ddata = to_panel_data(dssdev); - struct omap_dss_device *src = ddata->src; int r; mutex_lock(&ddata->lock); - src->ops->dsi.bus_lock(src); - r = dsicm_power_on(ddata); - - src->ops->dsi.bus_unlock(src); - if (r) goto err; @@ -696,7 +667,6 @@ err: static void dsicm_disable(struct omap_dss_device *dssdev) { struct panel_drv_data *ddata = to_panel_data(dssdev); - struct omap_dss_device *src = ddata->src; int r; dsicm_bl_power(ddata, false); @@ -705,24 +675,18 @@ static void dsicm_disable(struct omap_dss_device *dssdev) dsicm_cancel_ulps_work(ddata); - src->ops->dsi.bus_lock(src); - r = dsicm_wake_up(ddata); if (!r) dsicm_power_off(ddata); - src->ops->dsi.bus_unlock(src); - mutex_unlock(&ddata->lock); } static void dsicm_framedone_cb(int err, void *data) { struct panel_drv_data *ddata = data; - struct omap_dss_device *src = ddata->src; dev_dbg(&ddata->dsi->dev, "framedone, err %d\n", err); - src->ops->dsi.bus_unlock(src); } static int dsicm_update(struct omap_dss_device *dssdev, @@ -735,7 +699,6 @@ static int dsicm_update(struct omap_dss_device *dssdev, dev_dbg(&ddata->dsi->dev, "update %d, %d, %d x %d\n", x, y, w, h); mutex_lock(&ddata->lock); - src->ops->dsi.bus_lock(src); r = dsicm_wake_up(ddata); if (r) @@ -757,11 +720,10 @@ static int dsicm_update(struct omap_dss_device *dssdev, if (r) goto err; - /* note: no bus_unlock here. unlock is src framedone_cb */ mutex_unlock(&ddata->lock); + return 0; err: - src->ops->dsi.bus_unlock(src); mutex_unlock(&ddata->lock); return r; } @@ -787,7 +749,6 @@ static void dsicm_ulps_work(struct work_struct *work) struct panel_drv_data *ddata = container_of(work, struct panel_drv_data, ulps_work.work); struct omap_dss_device *dssdev = &ddata->dssdev; - struct omap_dss_device *src = ddata->src; mutex_lock(&ddata->lock); @@ -796,11 +757,8 @@ static void dsicm_ulps_work(struct work_struct *work) return; } - src->ops->dsi.bus_lock(src); - dsicm_enter_ulps(ddata); - src->ops->dsi.bus_unlock(src); mutex_unlock(&ddata->lock); } diff --git a/drivers/gpu/drm/omapdrm/dss/dsi.c b/drivers/gpu/drm/omapdrm/dss/dsi.c index b326ad9..2114151 100644 --- a/drivers/gpu/drm/omapdrm/dss/dsi.c +++ b/drivers/gpu/drm/omapdrm/dss/dsi.c @@ -477,17 +477,13 @@ static inline u32 dsi_read_reg(struct dsi_data *dsi, const struct dsi_reg idx) return __raw_readl(base + idx.idx); } -static void dsi_bus_lock(struct omap_dss_device *dssdev) +static void dsi_bus_lock(struct dsi_data *dsi) { - struct dsi_data *dsi = to_dsi_data(dssdev); - down(&dsi->bus_lock); } -static void dsi_bus_unlock(struct omap_dss_device *dssdev) +static void dsi_bus_unlock(struct dsi_data *dsi) { - struct dsi_data *dsi = to_dsi_data(dssdev); - up(&dsi->bus_lock); } @@ -3800,6 +3796,8 @@ static void dsi_handle_framedone(struct dsi_data *dsi, int error) REG_FLD_MOD(dsi, DSI_TIMING2, 1, 15, 15); /* LP_RX_TO */ } + dsi_bus_unlock(dsi); + dsi->framedone_callback(error, dsi->framedone_data); if (!error) @@ -3854,6 +3852,8 @@ static int dsi_update(struct omap_dss_device *dssdev, int channel, { struct dsi_data *dsi = to_dsi_data(dssdev); + dsi_bus_lock(dsi); + dsi->update_channel = channel; dsi->framedone_callback = callback; dsi->framedone_data = data; @@ -4059,7 +4059,7 @@ static void dsi_display_enable(struct omap_dss_device *dssdev) DSSDBG("dsi_display_enable\n"); - WARN_ON(!dsi_bus_is_locked(dsi)); + dsi_bus_lock(dsi); mutex_lock(&dsi->lock); @@ -4075,6 +4075,8 @@ static void dsi_display_enable(struct omap_dss_device *dssdev) mutex_unlock(&dsi->lock); + dsi_bus_unlock(dsi); + return; err_init_dsi: @@ -4091,7 +4093,7 @@ static void dsi_display_disable(struct omap_dss_device *dssdev, DSSDBG("dsi_display_disable\n"); - WARN_ON(!dsi_bus_is_locked(dsi)); + dsi_bus_lock(dsi); mutex_lock(&dsi->lock); @@ -4105,6 +4107,8 @@ static void dsi_display_disable(struct omap_dss_device *dssdev, dsi_runtime_put(dsi); mutex_unlock(&dsi->lock); + + dsi_bus_unlock(dsi); } static int dsi_enable_te(struct dsi_data *dsi, bool enable) @@ -4713,10 +4717,9 @@ static enum omap_channel dsi_get_channel(struct dsi_data *dsi) } } -static ssize_t omap_dsi_host_transfer(struct mipi_dsi_host *host, - const struct mipi_dsi_msg *msg) +static ssize_t _omap_dsi_host_transfer(struct dsi_data *dsi, + const struct mipi_dsi_msg *msg) { - struct dsi_data *dsi = host_to_omap(host); struct omap_dss_device *dssdev = &dsi->output; int r; @@ -4765,6 +4768,19 @@ static ssize_t omap_dsi_host_transfer(struct mipi_dsi_host *host, return 0; } +static ssize_t omap_dsi_host_transfer(struct mipi_dsi_host *host, + const struct mipi_dsi_msg *msg) +{ + struct dsi_data *dsi = host_to_omap(host); + int r; + + dsi_bus_lock(dsi); + r = _omap_dsi_host_transfer(dsi, msg); + dsi_bus_unlock(dsi); + + return r; +} + static int dsi_get_clocks(struct dsi_data *dsi) { struct clk *clk; @@ -4798,9 +4814,6 @@ static const struct omap_dss_device_ops dsi_ops = { .enable = dsi_display_enable, .dsi = { - .bus_lock = dsi_bus_lock, - .bus_unlock = dsi_bus_unlock, - .disable = dsi_display_disable, .set_config = dsi_set_config, diff --git a/drivers/gpu/drm/omapdrm/dss/omapdss.h b/drivers/gpu/drm/omapdrm/dss/omapdss.h index 161d08a..9bb9a7d 100644 --- a/drivers/gpu/drm/omapdrm/dss/omapdss.h +++ b/drivers/gpu/drm/omapdrm/dss/omapdss.h @@ -294,9 +294,6 @@ struct omapdss_dsi_ops { int (*update)(struct omap_dss_device *dssdev, int channel, void (*callback)(int, void *), void *data); - void (*bus_lock)(struct omap_dss_device *dssdev); - void (*bus_unlock)(struct omap_dss_device *dssdev); - int (*enable_video_output)(struct omap_dss_device *dssdev, int channel); void (*disable_video_output)(struct omap_dss_device *dssdev, int channel); -- 2.7.4