[PATCH v2 6/8] drm/msm/dpu: intf timing path for displayport

Jonathan Marek
2020-07-11T00:50:36Z

Calculate the correct timings for displayport, from downstream driver.

Signed-off-by: Jonathan Marek <jonathan@marek.ca>
---
drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c | 20 +++++++++++++++-----
1 file changed, 15 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c
index 64f556d693dd..6f0f54588124 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c
@@ -107,11 +107,6 @@ static void dpu_hw_intf_setup_timing_engine(struct dpu_hw_intf *ctx,
display_v_end = ((vsync_period - p->v_front_porch) * hsync_period) +
p->hsync_skew - 1;

- if (ctx->cap->type == INTF_EDP || ctx->cap->type == INTF_DP) {
- display_v_start += p->hsync_pulse_width + p->h_back_porch;
- display_v_end -= p->h_front_porch;
- }
-
hsync_start_x = p->h_back_porch + p->hsync_pulse_width;
hsync_end_x = hsync_period - p->h_front_porch - 1;

@@ -144,10 +139,25 @@ static void dpu_hw_intf_setup_timing_engine(struct dpu_hw_intf *ctx,
hsync_ctl = (hsync_period << 16) | p->hsync_pulse_width;
display_hctl = (hsync_end_x << 16) | hsync_start_x;

+ if (ctx->cap->type == INTF_EDP || ctx->cap->type == INTF_DP) {
+ active_h_start = hsync_start_x;
+ active_h_end = active_h_start + p->xres - 1;
+ active_v_start = display_v_start;
+ active_v_end = active_v_start + (p->yres * hsync_period) - 1;
+
+ display_v_start += p->hsync_pulse_width + p->h_back_porch;
+
+ active_hctl = (active_h_end << 16) | active_h_start;
+ display_hctl = active_hctl;
+ }
+
den_polarity = 0;
if (ctx->cap->type == INTF_HDMI) {
hsync_polarity = p->yres >= 720 ? 0 : 1;
vsync_polarity = p->yres >= 720 ? 0 : 1;
+ } else if (ctx->cap->type == INTF_DP) {
+ hsync_polarity = p->hsync_polarity;
+ vsync_polarity = p->vsync_polarity;
} else {
hsync_polarity = 0;
vsync_polarity = 0;
--
2.26.1