diff options
| -rw-r--r-- | drivers/media/platform/ti-vpe/cal.c | 170 |
1 files changed, 94 insertions, 76 deletions
diff --git a/drivers/media/platform/ti-vpe/cal.c b/drivers/media/platform/ti-vpe/cal.c index 6b0ed2946eba..50fe6c19c417 100644 --- a/drivers/media/platform/ti-vpe/cal.c +++ b/drivers/media/platform/ti-vpe/cal.c @@ -664,54 +664,50 @@ static void cal_camerarx_wait_stop_state(struct cal_camerarx *phy) phy_err(phy, "Timeout waiting for stop state\n"); } -static void cal_camerarx_wait_ready(struct cal_camerarx *phy) -{ - /* Steps - * 2. Wait for completion of reset - * Note if the external sensor is not sending byte clock, - * the reset will timeout - * 4.Force FORCERXMODE - * G. Wait for all enabled lane to reach stop state - * H. Disable pull down using pad control - */ - - /* 2. Wait for reset completion */ - cal_camerarx_wait_reset(phy); - - /* 4. G. Wait for all enabled lane to reach stop state */ - cal_camerarx_wait_stop_state(phy); - - phy_dbg(1, phy, "CSI2_%d_REG1 = 0x%08x (Bit(31,28) should be set!)\n", - phy->instance, reg_read(phy, CAL_CSI2_PHY_REG1)); -} - -static void cal_camerarx_init(struct cal_camerarx *phy, +static int cal_camerarx_start(struct cal_camerarx *phy, const struct cal_fmt *fmt) { - u32 val; u32 sscounter; + u32 val; + int ret; + + ret = cal_camerarx_get_external_info(phy); + if (ret < 0) + return ret; + + ret = v4l2_subdev_call(phy->sensor, core, s_power, 1); + if (ret < 0 && ret != -ENOIOCTLCMD && ret != -ENODEV) { + phy_err(phy, "power on failed in subdev\n"); + return ret; + } - /* Steps - * 1. Configure D-PHY mode and enable required lanes - * 2. Reset complex IO - Wait for completion of reset - * Note if the external sensor is not sending byte clock, - * the reset will timeout - * 3 Program Stop States - * A. Program THS_TERM, THS_SETTLE, etc... Timings parameters - * in terms of DDR clock periods - * B. Enable stop state transition timeouts - * 4.Force FORCERXMODE - * D. Enable pull down using pad control - * E. Power up PHY - * F. Wait for power up completion - * G. Wait for all enabled lane to reach stop state - * H. Disable pull down using pad control + /* + * CSI-2 PHY Link Initialization Sequence, according to the DRA74xP / + * DRA75xP / DRA76xP / DRA77xP TRM. The DRA71x / DRA72x and the AM65x / + * DRA80xM TRMs have a a slightly simplified sequence. */ - /* 1. Configure D-PHY mode and enable required lanes */ + /* + * 1. Configure all CSI-2 low level protocol registers to be ready to + * receive signals/data from the CSI-2 PHY. + * + * i.-v. Configure the lanes position and polarity. + */ + cal_camerarx_lane_config(phy); + + /* + * vi.-vii. Configure D-PHY mode, enable the required lanes and + * enable the CAMERARX clock. + */ cal_camerarx_enable(phy); - /* 2. Reset complex IO - Do not wait for reset completion */ + /* + * 2. CSI PHY and link initialization sequence. + * + * a. Deassert the CSI-2 PHY reset. Do not wait for reset completion + * at this point, as it requires the external sensor to send the + * CSI-2 HS clock. + */ reg_write_field(phy->cal, CAL_CSI2_COMPLEXIO_CFG(phy->instance), CAL_CSI2_COMPLEXIO_CFG_RESET_CTRL_OPERATIONAL, CAL_CSI2_COMPLEXIO_CFG_RESET_CTRL_MASK); @@ -719,19 +715,20 @@ static void cal_camerarx_init(struct cal_camerarx *phy, phy->instance, reg_read(phy->cal, CAL_CSI2_COMPLEXIO_CFG(phy->instance))); - /* Dummy read to allow SCP reset to complete */ + /* Dummy read to allow SCP reset to complete. */ reg_read(phy, CAL_CSI2_PHY_REG0); - /* 3.A. Program Phy Timing Parameters */ + /* Program the PHY timing parameters. */ cal_camerarx_config(phy, fmt); - /* 3.B. Program Stop States */ /* + * b. Assert the FORCERXMODE signal. + * * The stop-state-counter is based on fclk cycles, and we always use * the x16 and x4 settings, so stop-state-timeout = * fclk-cycle * 16 * 4 * counter. * - * Stop-state-timeout must be more than 100us as per CSI2 spec, so we + * Stop-state-timeout must be more than 100us as per CSI-2 spec, so we * calculate a timeout that's 100us (rounding up). */ sscounter = DIV_ROUND_UP(clk_get_rate(phy->cal->fclk), 10000 * 16 * 4); @@ -745,24 +742,63 @@ static void cal_camerarx_init(struct cal_camerarx *phy, phy->instance, reg_read(phy->cal, CAL_CSI2_TIMING(phy->instance))); - /* 4. Force FORCERXMODE */ + /* Assert the FORCERXMODE signal. */ reg_write_field(phy->cal, CAL_CSI2_TIMING(phy->instance), 1, CAL_CSI2_TIMING_FORCE_RX_MODE_IO1_MASK); phy_dbg(3, phy, "CAL_CSI2_TIMING(%d) = 0x%08x Force RXMODE\n", phy->instance, reg_read(phy->cal, CAL_CSI2_TIMING(phy->instance))); - /* E. Power up the PHY using the complex IO */ + /* + * c. Connect pull-down on CSI-2 PHY link (using pad control). + * + * This is not required on DRA71x, DRA72x, AM65x and DRA80xM. Not + * implemented. + */ + + /* + * d. Power up the CSI-2 PHY. + * e. Check whether the state status reaches the ON state. + */ cal_camerarx_power(phy, true); + + /* + * Start the sensor to enable the CSI-2 HS clock. We can now wait for + * CSI-2 PHY reset to complete. + */ + ret = v4l2_subdev_call(phy->sensor, video, s_stream, 1); + if (ret) { + v4l2_subdev_call(phy->sensor, core, s_power, 0); + phy_err(phy, "stream on failed in subdev\n"); + return ret; + } + + cal_camerarx_wait_reset(phy); + + /* f. Wait for STOPSTATE=1 for all enabled lane modules. */ + cal_camerarx_wait_stop_state(phy); + + phy_dbg(1, phy, "CSI2_%u_REG1 = 0x%08x (bits 31-28 should be set)\n", + phy->instance, reg_read(phy, CAL_CSI2_PHY_REG1)); + + /* + * g. Disable pull-down on CSI-2 PHY link (using pad control). + * + * This is not required on DRA71x, DRA72x, AM65x and DRA80xM. Not + * implemented. + */ + + return 0; } -static void cal_camerarx_deinit(struct cal_camerarx *phy) +static void cal_camerarx_stop(struct cal_camerarx *phy) { unsigned int i; + int ret; cal_camerarx_power(phy, false); - /* Assert Comple IO Reset */ + /* Assert Complex IO Reset */ reg_write_field(phy->cal, CAL_CSI2_COMPLEXIO_CFG(phy->instance), CAL_CSI2_COMPLEXIO_CFG_RESET_CTRL, CAL_CSI2_COMPLEXIO_CFG_RESET_CTRL_MASK); @@ -783,6 +819,13 @@ static void cal_camerarx_deinit(struct cal_camerarx *phy) /* Disable the phy */ cal_camerarx_disable(phy); + + if (v4l2_subdev_call(phy->sensor, video, s_stream, 0)) + phy_err(phy, "stream off failed in subdev\n"); + + ret = v4l2_subdev_call(phy->sensor, core, s_power, 0); + if (ret < 0 && ret != -ENOIOCTLCMD && ret != -ENODEV) + phy_err(phy, "power off failed in subdev\n"); } /* @@ -1809,36 +1852,19 @@ static int cal_start_streaming(struct vb2_queue *vq, unsigned int count) addr = vb2_dma_contig_plane_dma_addr(&ctx->cur_frm->vb.vb2_buf, 0); ctx->sequence = 0; - ret = cal_camerarx_get_external_info(ctx->phy); - if (ret < 0) - goto err; - - ret = v4l2_subdev_call(ctx->phy->sensor, core, s_power, 1); - if (ret < 0 && ret != -ENOIOCTLCMD && ret != -ENODEV) { - ctx_err(ctx, "power on failed in subdev\n"); - goto err; - } - pm_runtime_get_sync(ctx->cal->dev); cal_ctx_csi2_config(ctx); cal_ctx_pix_proc_config(ctx); cal_ctx_wr_dma_config(ctx, ctx->v_fmt.fmt.pix.bytesperline, ctx->v_fmt.fmt.pix.height); - cal_camerarx_lane_config(ctx->phy); cal_camerarx_enable_irqs(ctx->phy); - cal_camerarx_init(ctx->phy, ctx->fmt); - ret = v4l2_subdev_call(ctx->phy->sensor, video, s_stream, 1); - if (ret) { - v4l2_subdev_call(ctx->phy->sensor, core, s_power, 0); - ctx_err(ctx, "stream on failed in subdev\n"); - pm_runtime_put_sync(ctx->cal->dev); + ret = cal_camerarx_start(ctx->phy, ctx->fmt); + if (ret) goto err; - } - cal_camerarx_wait_ready(ctx->phy); cal_ctx_wr_dma_addr(ctx, addr); cal_camerarx_ppi_enable(ctx->phy); @@ -1867,7 +1893,6 @@ static void cal_stop_streaming(struct vb2_queue *vq) struct cal_buffer *buf, *tmp; unsigned long timeout; unsigned long flags; - int ret; bool dma_act; cal_camerarx_ppi_disable(ctx->phy); @@ -1887,14 +1912,7 @@ static void cal_stop_streaming(struct vb2_queue *vq) ctx_err(ctx, "failed to disable dma cleanly\n"); cal_camerarx_disable_irqs(ctx->phy); - cal_camerarx_deinit(ctx->phy); - - if (v4l2_subdev_call(ctx->phy->sensor, video, s_stream, 0)) - ctx_err(ctx, "stream off failed in subdev\n"); - - ret = v4l2_subdev_call(ctx->phy->sensor, core, s_power, 0); - if (ret < 0 && ret != -ENOIOCTLCMD && ret != -ENODEV) - ctx_err(ctx, "power off failed in subdev\n"); + cal_camerarx_stop(ctx->phy); /* Release all active buffers */ spin_lock_irqsave(&ctx->slock, flags); |