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drm/msm/dpu: support setting the TE source

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Make the DPU driver use the TE source specified in the DT. If none is
specified, the driver defaults to the first GPIO (mdp_vsync_p).

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Patchwork: https://patchwork.freedesktop.org/patch/598733/
Link: https://lore.kernel.org/r/20240613-dpu-handle-te-signal-v2-7-67a0116b5366@linaro.org
This commit is contained in:
Dmitry Baryshkov
2024-06-13 20:05:10 +03:00
parent 958d8d99cc
commit bb3db0eb68
1 changed files with 43 additions and 1 deletions
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drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
+43 -1
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@@ -505,6 +505,44 @@ static void dpu_kms_wait_flush(struct msm_kms *kms, unsigned crtc_mask)
dpu_kms_wait_for_commit_done(kms, crtc);
}
static const char *dpu_vsync_sources[] = {
[DPU_VSYNC_SOURCE_GPIO_0] = "mdp_vsync_p",
[DPU_VSYNC_SOURCE_GPIO_1] = "mdp_vsync_s",
[DPU_VSYNC_SOURCE_GPIO_2] = "mdp_vsync_e",
[DPU_VSYNC_SOURCE_INTF_0] = "mdp_intf0",
[DPU_VSYNC_SOURCE_INTF_1] = "mdp_intf1",
[DPU_VSYNC_SOURCE_INTF_2] = "mdp_intf2",
[DPU_VSYNC_SOURCE_INTF_3] = "mdp_intf3",
[DPU_VSYNC_SOURCE_WD_TIMER_0] = "timer0",
[DPU_VSYNC_SOURCE_WD_TIMER_1] = "timer1",
[DPU_VSYNC_SOURCE_WD_TIMER_2] = "timer2",
[DPU_VSYNC_SOURCE_WD_TIMER_3] = "timer3",
[DPU_VSYNC_SOURCE_WD_TIMER_4] = "timer4",
};
static int dpu_kms_dsi_set_te_source(struct msm_display_info *info,
struct msm_dsi *dsi)
{
const char *te_source = msm_dsi_get_te_source(dsi);
int i;
if (!te_source) {
info->vsync_source = DPU_VSYNC_SOURCE_GPIO_0;
return 0;
}
/* we can not use match_string since dpu_vsync_sources is a sparse array */
for (i = 0; i < ARRAY_SIZE(dpu_vsync_sources); i++) {
if (dpu_vsync_sources[i] &&
!strcmp(dpu_vsync_sources[i], te_source)) {
info->vsync_source = i;
return 0;
}
}
return -EINVAL;
}
static int _dpu_kms_initialize_dsi(struct drm_device *dev,
struct msm_drm_private *priv,
struct dpu_kms *dpu_kms)
@@ -543,7 +581,11 @@ static int _dpu_kms_initialize_dsi(struct drm_device *dev,
info.is_cmd_mode = msm_dsi_is_cmd_mode(priv->dsi[i]);
info.vsync_source = DPU_VSYNC_SOURCE_GPIO_0;
rc = dpu_kms_dsi_set_te_source(&info, priv->dsi[i]);
if (rc) {
DPU_ERROR("failed to identify TE source for dsi display\n");
return rc;
}
encoder = dpu_encoder_init(dev, DRM_MODE_ENCODER_DSI, &info);
if (IS_ERR(encoder)) {