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authorArchit Taneja <architt@codeaurora.org>2017-07-28 16:17:04 +0530
committerRob Clark <robdclark@gmail.com>2017-08-02 07:53:46 -0400
commitf54ca1a0966bcdb525aee130a043a8adbccc5cbb (patch)
tree51473d35f3d49d0611bb6eee19fe8e9e1a4fbf1a /drivers/gpu/drm/msm/dsi/dsi_host.c
parentf6be1121ea8aa563f5a651cf5a96742c965a95f7 (diff)
drm/msm/dsi: Implement RPM suspend/resume callbacks
The bus clocks are always enabled/disabled along with the power domain, so move it to the runtime suspend/resume ops. This cleans up the clock code a bit. Get rid of the clk_mutex mutex since it isn't needed. Signed-off-by: Archit Taneja <architt@codeaurora.org> Signed-off-by: Rob Clark <robdclark@gmail.com>
Diffstat (limited to 'drivers/gpu/drm/msm/dsi/dsi_host.c')
-rw-r--r--drivers/gpu/drm/msm/dsi/dsi_host.c83
1 files changed, 42 insertions, 41 deletions
diff --git a/drivers/gpu/drm/msm/dsi/dsi_host.c b/drivers/gpu/drm/msm/dsi/dsi_host.c
index da0913a33ca0..dbb31a014419 100644
--- a/drivers/gpu/drm/msm/dsi/dsi_host.c
+++ b/drivers/gpu/drm/msm/dsi/dsi_host.c
@@ -135,7 +135,6 @@ struct msm_dsi_host {
struct completion video_comp;
struct mutex dev_mutex;
struct mutex cmd_mutex;
- struct mutex clk_mutex;
spinlock_t intr_lock; /* Protect interrupt ctrl register */
u32 err_work_state;
@@ -458,6 +457,34 @@ static void dsi_bus_clk_disable(struct msm_dsi_host *msm_host)
clk_disable_unprepare(msm_host->bus_clks[i]);
}
+int msm_dsi_runtime_suspend(struct device *dev)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct msm_dsi *msm_dsi = platform_get_drvdata(pdev);
+ struct mipi_dsi_host *host = msm_dsi->host;
+ struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
+
+ if (!msm_host->cfg_hnd)
+ return 0;
+
+ dsi_bus_clk_disable(msm_host);
+
+ return 0;
+}
+
+int msm_dsi_runtime_resume(struct device *dev)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct msm_dsi *msm_dsi = platform_get_drvdata(pdev);
+ struct mipi_dsi_host *host = msm_dsi->host;
+ struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
+
+ if (!msm_host->cfg_hnd)
+ return 0;
+
+ return dsi_bus_clk_enable(msm_host);
+}
+
static int dsi_link_clk_enable_6g(struct msm_dsi_host *msm_host)
{
int ret;
@@ -599,35 +626,6 @@ static void dsi_link_clk_disable(struct msm_dsi_host *msm_host)
}
}
-static int dsi_clk_ctrl(struct msm_dsi_host *msm_host, bool enable)
-{
- int ret = 0;
-
- mutex_lock(&msm_host->clk_mutex);
- if (enable) {
- ret = dsi_bus_clk_enable(msm_host);
- if (ret) {
- pr_err("%s: Can not enable bus clk, %d\n",
- __func__, ret);
- goto unlock_ret;
- }
- ret = dsi_link_clk_enable(msm_host);
- if (ret) {
- pr_err("%s: Can not enable link clk, %d\n",
- __func__, ret);
- dsi_bus_clk_disable(msm_host);
- goto unlock_ret;
- }
- } else {
- dsi_link_clk_disable(msm_host);
- dsi_bus_clk_disable(msm_host);
- }
-
-unlock_ret:
- mutex_unlock(&msm_host->clk_mutex);
- return ret;
-}
-
static int dsi_calc_clk_rate(struct msm_dsi_host *msm_host)
{
struct drm_display_mode *mode = msm_host->mode;
@@ -1702,6 +1700,7 @@ int msm_dsi_host_init(struct msm_dsi *msm_dsi)
}
msm_host->pdev = pdev;
+ msm_dsi->host = &msm_host->base;
ret = dsi_host_parse_dt(msm_host);
if (ret) {
@@ -1758,7 +1757,6 @@ int msm_dsi_host_init(struct msm_dsi *msm_dsi)
init_completion(&msm_host->video_comp);
mutex_init(&msm_host->dev_mutex);
mutex_init(&msm_host->cmd_mutex);
- mutex_init(&msm_host->clk_mutex);
spin_lock_init(&msm_host->intr_lock);
/* setup workqueue */
@@ -1766,7 +1764,6 @@ int msm_dsi_host_init(struct msm_dsi *msm_dsi)
INIT_WORK(&msm_host->err_work, dsi_err_worker);
INIT_WORK(&msm_host->hpd_work, dsi_hpd_worker);
- msm_dsi->host = &msm_host->base;
msm_dsi->id = msm_host->id;
DBG("Dsi Host %d initialized", msm_host->id);
@@ -1788,7 +1785,6 @@ void msm_dsi_host_destroy(struct mipi_dsi_host *host)
msm_host->workqueue = NULL;
}
- mutex_destroy(&msm_host->clk_mutex);
mutex_destroy(&msm_host->cmd_mutex);
mutex_destroy(&msm_host->dev_mutex);
@@ -1889,7 +1885,7 @@ int msm_dsi_host_xfer_prepare(struct mipi_dsi_host *host,
* mdp clock need to be enabled to receive dsi interrupt
*/
pm_runtime_get_sync(&msm_host->pdev->dev);
- dsi_clk_ctrl(msm_host, 1);
+ dsi_link_clk_enable(msm_host);
/* TODO: vote for bus bandwidth */
@@ -1919,7 +1915,7 @@ void msm_dsi_host_xfer_restore(struct mipi_dsi_host *host,
/* TODO: unvote for bus bandwidth */
- dsi_clk_ctrl(msm_host, 0);
+ dsi_link_clk_disable(msm_host);
pm_runtime_put_autosuspend(&msm_host->pdev->dev);
}
@@ -2169,8 +2165,11 @@ int msm_dsi_host_enable(struct mipi_dsi_host *host)
* and only turned on before MDP START.
* This part of code should be enabled once mdp driver support it.
*/
- /* if (msm_panel->mode == MSM_DSI_CMD_MODE)
- dsi_clk_ctrl(msm_host, 0); */
+ /* if (msm_panel->mode == MSM_DSI_CMD_MODE) {
+ * dsi_link_clk_disable(msm_host);
+ * pm_runtime_put_autosuspend(&msm_host->pdev->dev);
+ * }
+ */
return 0;
}
@@ -2227,9 +2226,10 @@ int msm_dsi_host_power_on(struct mipi_dsi_host *host,
}
pm_runtime_get_sync(&msm_host->pdev->dev);
- ret = dsi_clk_ctrl(msm_host, 1);
+ ret = dsi_link_clk_enable(msm_host);
if (ret) {
- pr_err("%s: failed to enable clocks. ret=%d\n", __func__, ret);
+ pr_err("%s: failed to enable link clocks. ret=%d\n",
+ __func__, ret);
goto fail_disable_reg;
}
@@ -2253,7 +2253,8 @@ int msm_dsi_host_power_on(struct mipi_dsi_host *host,
return 0;
fail_disable_clk:
- dsi_clk_ctrl(msm_host, 0);
+ dsi_link_clk_disable(msm_host);
+ pm_runtime_put_autosuspend(&msm_host->pdev->dev);
fail_disable_reg:
dsi_host_regulator_disable(msm_host);
unlock_ret:
@@ -2278,7 +2279,7 @@ int msm_dsi_host_power_off(struct mipi_dsi_host *host)
pinctrl_pm_select_sleep_state(&msm_host->pdev->dev);
- dsi_clk_ctrl(msm_host, 0);
+ dsi_link_clk_disable(msm_host);
pm_runtime_put_autosuspend(&msm_host->pdev->dev);
dsi_host_regulator_disable(msm_host);