diff options
Diffstat (limited to 'drivers/gpu/drm/mcde')
| -rw-r--r-- | drivers/gpu/drm/mcde/mcde_drv.c | 13 | ||||
| -rw-r--r-- | drivers/gpu/drm/mcde/mcde_dsi.c | 70 |
2 files changed, 54 insertions, 29 deletions
diff --git a/drivers/gpu/drm/mcde/mcde_drv.c b/drivers/gpu/drm/mcde/mcde_drv.c index baf63fb6850a..9a09eba53182 100644 --- a/drivers/gpu/drm/mcde/mcde_drv.c +++ b/drivers/gpu/drm/mcde/mcde_drv.c @@ -237,7 +237,7 @@ DEFINE_DRM_GEM_CMA_FOPS(drm_fops); static struct drm_driver mcde_drm_driver = { .driver_features = - DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME | DRIVER_ATOMIC, + DRIVER_MODESET | DRIVER_GEM | DRIVER_ATOMIC, .release = mcde_release, .lastclose = drm_fb_helper_lastclose, .ioctls = NULL, @@ -254,8 +254,6 @@ static struct drm_driver mcde_drm_driver = { .prime_handle_to_fd = drm_gem_prime_handle_to_fd, .prime_fd_to_handle = drm_gem_prime_fd_to_handle, - .gem_prime_import = drm_gem_prime_import, - .gem_prime_export = drm_gem_prime_export, .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table, .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table, .gem_prime_vmap = drm_gem_cma_prime_vmap, @@ -319,7 +317,7 @@ static int mcde_probe(struct platform_device *pdev) struct device *dev = &pdev->dev; struct drm_device *drm; struct mcde *mcde; - struct component_match *match; + struct component_match *match = NULL; struct resource *res; u32 pid; u32 val; @@ -477,14 +475,17 @@ static int mcde_probe(struct platform_device *pdev) struct device_driver *drv = &mcde_component_drivers[i]->driver; struct device *p = NULL, *d; - while ((d = bus_find_device(&platform_bus_type, p, drv, - (void *)platform_bus_type.match))) { + while ((d = platform_find_device_by_driver(p, drv))) { put_device(p); component_match_add(dev, &match, mcde_compare_dev, d); p = d; } put_device(p); } + if (!match) { + dev_err(dev, "no matching components\n"); + return -ENODEV; + } if (IS_ERR(match)) { dev_err(dev, "could not create component match\n"); ret = PTR_ERR(match); diff --git a/drivers/gpu/drm/mcde/mcde_dsi.c b/drivers/gpu/drm/mcde/mcde_dsi.c index 07f7090d08b3..f9c9e32b299c 100644 --- a/drivers/gpu/drm/mcde/mcde_dsi.c +++ b/drivers/gpu/drm/mcde/mcde_dsi.c @@ -178,22 +178,26 @@ static ssize_t mcde_dsi_host_transfer(struct mipi_dsi_host *host, const u32 loop_delay_us = 10; /* us */ const u8 *tx = msg->tx_buf; u32 loop_counter; - size_t txlen; + size_t txlen = msg->tx_len; + size_t rxlen = msg->rx_len; u32 val; int ret; int i; - txlen = msg->tx_len; - if (txlen > 12) { + if (txlen > 16) { dev_err(d->dev, - "dunno how to write more than 12 bytes yet\n"); + "dunno how to write more than 16 bytes yet\n"); + return -EIO; + } + if (rxlen > 4) { + dev_err(d->dev, + "dunno how to read more than 4 bytes yet\n"); return -EIO; } dev_dbg(d->dev, - "message to channel %d, %zd bytes", - msg->channel, - txlen); + "message to channel %d, write %zd bytes read %zd bytes\n", + msg->channel, txlen, rxlen); /* Command "nature" */ if (MCDE_DSI_HOST_IS_READ(msg->type)) @@ -210,9 +214,7 @@ static ssize_t mcde_dsi_host_transfer(struct mipi_dsi_host *host, if (mipi_dsi_packet_format_is_long(msg->type)) val |= DSI_DIRECT_CMD_MAIN_SETTINGS_CMD_LONGNOTSHORT; val |= 0 << DSI_DIRECT_CMD_MAIN_SETTINGS_CMD_ID_SHIFT; - /* Add one to the length for the MIPI DCS command */ - val |= txlen - << DSI_DIRECT_CMD_MAIN_SETTINGS_CMD_SIZE_SHIFT; + val |= txlen << DSI_DIRECT_CMD_MAIN_SETTINGS_CMD_SIZE_SHIFT; val |= DSI_DIRECT_CMD_MAIN_SETTINGS_CMD_LP_EN; val |= msg->type << DSI_DIRECT_CMD_MAIN_SETTINGS_CMD_HEAD_SHIFT; writel(val, d->regs + DSI_DIRECT_CMD_MAIN_SETTINGS); @@ -249,17 +251,36 @@ static ssize_t mcde_dsi_host_transfer(struct mipi_dsi_host *host, writel(1, d->regs + DSI_DIRECT_CMD_SEND); loop_counter = 1000 * 1000 / loop_delay_us; - while (!(readl(d->regs + DSI_DIRECT_CMD_STS) & - DSI_DIRECT_CMD_STS_WRITE_COMPLETED) - && --loop_counter) - usleep_range(loop_delay_us, (loop_delay_us * 3) / 2); - - if (!loop_counter) { - dev_err(d->dev, "DSI write timeout!\n"); - return -ETIME; + if (MCDE_DSI_HOST_IS_READ(msg->type)) { + /* Read command */ + while (!(readl(d->regs + DSI_DIRECT_CMD_STS) & + (DSI_DIRECT_CMD_STS_READ_COMPLETED | + DSI_DIRECT_CMD_STS_READ_COMPLETED_WITH_ERR)) + && --loop_counter) + usleep_range(loop_delay_us, (loop_delay_us * 3) / 2); + if (!loop_counter) { + dev_err(d->dev, "DSI read timeout!\n"); + return -ETIME; + } + } else { + /* Writing only */ + while (!(readl(d->regs + DSI_DIRECT_CMD_STS) & + DSI_DIRECT_CMD_STS_WRITE_COMPLETED) + && --loop_counter) + usleep_range(loop_delay_us, (loop_delay_us * 3) / 2); + + if (!loop_counter) { + dev_err(d->dev, "DSI write timeout!\n"); + return -ETIME; + } } val = readl(d->regs + DSI_DIRECT_CMD_STS); + if (val & DSI_DIRECT_CMD_STS_READ_COMPLETED_WITH_ERR) { + dev_err(d->dev, "read completed with error\n"); + writel(1, d->regs + DSI_DIRECT_CMD_RD_INIT); + return -EIO; + } if (val & DSI_DIRECT_CMD_STS_ACKNOWLEDGE_WITH_ERR_RECEIVED) { val >>= DSI_DIRECT_CMD_STS_ACK_VAL_SHIFT; dev_err(d->dev, "error during transmission: %04x\n", @@ -269,10 +290,7 @@ static ssize_t mcde_dsi_host_transfer(struct mipi_dsi_host *host, if (!MCDE_DSI_HOST_IS_READ(msg->type)) { /* Return number of bytes written */ - if (mipi_dsi_packet_format_is_long(msg->type)) - ret = 4 + txlen; - else - ret = 4; + ret = txlen; } else { /* OK this is a read command, get the response */ u32 rdsz; @@ -282,7 +300,13 @@ static ssize_t mcde_dsi_host_transfer(struct mipi_dsi_host *host, rdsz = readl(d->regs + DSI_DIRECT_CMD_RD_PROPERTY); rdsz &= DSI_DIRECT_CMD_RD_PROPERTY_RD_SIZE_MASK; rddat = readl(d->regs + DSI_DIRECT_CMD_RDDAT); - for (i = 0; i < 4 && i < rdsz; i++) + if (rdsz < rxlen) { + dev_err(d->dev, "read error, requested %zd got %d\n", + rxlen, rdsz); + return -EIO; + } + /* FIXME: read more than 4 bytes */ + for (i = 0; i < 4 && i < rxlen; i++) rx[i] = (rddat >> (i * 8)) & 0xff; ret = rdsz; } |
