@@ -65,6 +65,73 @@ static void dpu_crtc_destroy(struct drm_crtc *crtc)
kfree(dpu_crtc);
}
+static struct drm_encoder *get_encoder_from_crtc(struct drm_crtc *crtc)
+{
+ struct drm_device *dev = crtc->dev;
+ struct drm_encoder *encoder;
+
+ drm_for_each_encoder(encoder, dev)
+ if (encoder->crtc == crtc)
+ return encoder;
+
+ return NULL;
+}
+
+static bool dpu_crtc_get_scanout_position(struct drm_crtc *crtc,
+ bool in_vblank_irq,
+ int *vpos, int *hpos,
+ ktime_t *stime, ktime_t *etime,
+ const struct drm_display_mode *mode)
+{
+ unsigned int pipe = crtc->index;
+ struct drm_encoder *encoder;
+ int line, vsw, vbp, vactive_start, vactive_end, vfp_end;
+
+
+ encoder = get_encoder_from_crtc(crtc);
+ if (!encoder) {
+ DRM_ERROR("no encoder found for crtc %d\n", pipe);
+ return false;
+ }
+
+ vsw = mode->crtc_vsync_end - mode->crtc_vsync_start;
+ vbp = mode->crtc_vtotal - mode->crtc_vsync_end;
+
+ /*
+ * the line counter is 1 at the start of the VSYNC pulse and VTOTAL at
+ * the end of VFP. Translate the porch values relative to the line
+ * counter positions.
+ */
+
+ vactive_start = vsw + vbp + 1;
+
+ vactive_end = vactive_start + mode->crtc_vdisplay;
+
+ /* last scan line before VSYNC */
+ vfp_end = mode->crtc_vtotal;
+
+ if (stime)
+ *stime = ktime_get();
+
+ line = dpu_encoder_get_linecount(encoder);
+
+ if (line < vactive_start)
+ line -= vactive_start;
+ else if (line > vactive_end)
+ line = line - vfp_end - vactive_start;
+ else
+ line -= vactive_start;
+
+ *vpos = line;
+ *hpos = 0;
+
+ if (etime)
+ *etime = ktime_get();
+
+ return true;
+}
+
+
static void _dpu_crtc_setup_blend_cfg(struct dpu_crtc_mixer *mixer,
struct dpu_plane_state *pstate, struct dpu_format *format)
{
@@ -1243,6 +1310,7 @@ static const struct drm_crtc_funcs dpu_crtc_funcs = {
.early_unregister = dpu_crtc_early_unregister,
.enable_vblank = msm_crtc_enable_vblank,
.disable_vblank = msm_crtc_disable_vblank,
+ .get_vblank_timestamp = drm_crtc_vblank_helper_get_vblank_timestamp,
};
static const struct drm_crtc_helper_funcs dpu_crtc_helper_funcs = {
@@ -1251,6 +1319,7 @@ static const struct drm_crtc_helper_funcs dpu_crtc_helper_funcs = {
.atomic_check = dpu_crtc_atomic_check,
.atomic_begin = dpu_crtc_atomic_begin,
.atomic_flush = dpu_crtc_atomic_flush,
+ .get_scanout_position = dpu_crtc_get_scanout_position,
};
/* initialize crtc */
@@ -425,6 +425,21 @@ int dpu_encoder_helper_unregister_irq(struct dpu_encoder_phys *phys_enc,
return 0;
}
+int dpu_encoder_get_linecount(struct drm_encoder *drm_enc)
+{
+ struct dpu_encoder_virt *dpu_enc = NULL;
+ struct dpu_encoder_phys *phys = NULL;
+ int linecount = 0;
+
+ dpu_enc = to_dpu_encoder_virt(drm_enc);
+ phys = dpu_enc ? dpu_enc->cur_master : NULL;
+
+ if (phys && phys->ops.get_line_count)
+ linecount = phys->ops.get_line_count(phys);
+
+ return linecount;
+}
+
void dpu_encoder_get_hw_resources(struct drm_encoder *drm_enc,
struct dpu_encoder_hw_resources *hw_res)
{
@@ -156,5 +156,11 @@ void dpu_encoder_prepare_commit(struct drm_encoder *drm_enc);
*/
void dpu_encoder_set_idle_timeout(struct drm_encoder *drm_enc,
u32 idle_timeout);
+/**
+ * dpu_encoder_get_linecount - get interface line count for the encoder.
+ * @drm_enc: Pointer to previously created drm encoder structure
+ */
+
+int dpu_encoder_get_linecount(struct drm_encoder *drm_enc);
#endif /* __DPU_ENCODER_H__ */
@@ -14,6 +14,7 @@
#include <drm/drm_crtc.h>
#include <drm/drm_file.h>
+#include <drm/drm_vblank.h>
#include "msm_drv.h"
#include "msm_mmu.h"
@@ -1020,6 +1021,9 @@ static int dpu_kms_hw_init(struct msm_kms *kms)
*/
dev->mode_config.allow_fb_modifiers = true;
+ /* Disable vblank irqs aggressively for power-saving */
+ dev->vblank_disable_immediate = true;
+
/*
* _dpu_kms_drm_obj_init should create the DRM related objects
* i.e. CRTCs, planes, encoders, connectors and so forth
Turn off vblank irqs immediately as soon as drm_vblank_put is requested so that there are no irqs triggered during idle state. This will reduce cpu wakeups and help in power saving. The change also enable driver timestamp for vblanks. Signed-off-by: Kalyan Thota <kalyan_t@codeaurora.org> --- drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c | 69 +++++++++++++++++++++++++++++ drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c | 15 +++++++ drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.h | 6 +++ drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c | 4 ++ 4 files changed, 94 insertions(+)