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drm/msm/dsi: Create a helper to check if there is a connected device

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Create a helper msm_dsi_device_connected() which checks whether we have a
device connected to the dsi host or not. This check gets messy when we
have support external bridges too. Having an inline function makes it
more legible.

For now, the check only consists of msm_dsi->panel being non-NULL. Later,
this will check if we have an external bridge or not.

This helper isn't used in dsi_connector related code as that's specific
to only when a drm_panel is connected.

Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>
This commit is contained in:
Archit Taneja 2015-08-03 14:08:33 +05:30 committed by Rob Clark
parent a9ddac9c57
commit 6f054ec5b9
3 changed files with 10 additions and 3 deletions
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2
drivers/gpu/drm/msm/dsi/dsi.c
View File

@ -15,7 +15,7 @@
struct drm_encoder *msm_dsi_get_encoder(struct msm_dsi *msm_dsi)
{
if (!msm_dsi || !msm_dsi->panel)
if (!msm_dsi || !msm_dsi_device_connected(msm_dsi))
return NULL;
return (msm_dsi->device_flags & MIPI_DSI_MODE_VIDEO) ?

5
drivers/gpu/drm/msm/dsi/dsi.h
View File

@ -85,6 +85,11 @@ int msm_dsi_manager_register(struct msm_dsi *msm_dsi);
void msm_dsi_manager_unregister(struct msm_dsi *msm_dsi);
/* msm dsi */
static inline bool msm_dsi_device_connected(struct msm_dsi *msm_dsi)
{
return msm_dsi->panel;
}
struct drm_encoder *msm_dsi_get_encoder(struct msm_dsi *msm_dsi);
/* dsi pll */

6
drivers/gpu/drm/msm/dsi/dsi_manager.c
View File

@ -344,7 +344,8 @@ static void dsi_mgr_bridge_pre_enable(struct drm_bridge *bridge)
int ret;
DBG("id=%d", id);
if (!panel || (is_dual_dsi && (DSI_1 == id)))
if (!msm_dsi_device_connected(msm_dsi) ||
(is_dual_dsi && (DSI_1 == id)))
return;
ret = msm_dsi_host_power_on(host);
@ -431,7 +432,8 @@ static void dsi_mgr_bridge_post_disable(struct drm_bridge *bridge)
DBG("id=%d", id);
if (!panel || (is_dual_dsi && (DSI_1 == id)))
if (!msm_dsi_device_connected(msm_dsi) ||
(is_dual_dsi && (DSI_1 == id)))
return;
ret = drm_panel_disable(panel);