[V2,6/6] drm: bridge: samsung-dsim: Let blanking calcuation work in non-burst mode

Commit Message

Adam Ford April 23, 2023, 12:12 p.m. UTC

The blanking calculation currently uses burst_clk_rate for calculating
the settings. Since it's possible to use this in non-burst mode, it's
possible that where won't be burst_clk_rate.  Instead, cache the
clock rate configured from of samsung_dsim_set_pll and use it instead.

Signed-off-by: Adam Ford <[e-mail]>
---
 drivers/gpu/drm/bridge/samsung-dsim.c | 4 +++-
 include/drm/bridge/samsung-dsim.h     | 1 +
 2 files changed, 4 insertions(+), 1 deletion(-)

Patch

diff --git a/drivers/gpu/drm/bridge/samsung-dsim.c b/drivers/gpu/drm/bridge/samsung-dsim.c
index cea847b8e23c..8c69d22a57b7 100644
--- a/drivers/gpu/drm/bridge/samsung-dsim.c
+++ b/drivers/gpu/drm/bridge/samsung-dsim.c
@@ -652,6 +652,8 @@  static unsigned long samsung_dsim_set_pll(struct samsung_dsim *dsi,
 		reg = samsung_dsim_read(dsi, DSIM_STATUS_REG);
 	} while ((reg & DSIM_PLL_STABLE) == 0);
 
+	dsi->hs_clock = fout;
+
 	return fout;
 }
 
@@ -960,7 +962,7 @@  static void samsung_dsim_set_display_mode(struct samsung_dsim *dsi)
 	u32 reg;
 
 	if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO) {
-		int byte_clk_khz = dsi->burst_clk_rate / 1000 / 8;
+		int byte_clk_khz = dsi->hs_clock / 1000 / 8;
 		int hfp = (m->hsync_start - m->hdisplay) * byte_clk_khz / m->clock;
 		int hbp = (m->htotal - m->hsync_end) * byte_clk_khz / m->clock;
 		int hsa = (m->hsync_end - m->hsync_start) * byte_clk_khz / m->clock;
diff --git a/include/drm/bridge/samsung-dsim.h b/include/drm/bridge/samsung-dsim.h
index 25475d78adb3..41cbae00cd7e 100644
--- a/include/drm/bridge/samsung-dsim.h
+++ b/include/drm/bridge/samsung-dsim.h
@@ -94,6 +94,7 @@  struct samsung_dsim {
 
 	u32 pll_clk_rate;
 	u32 burst_clk_rate;
+	u32 hs_clock;
 	u32 esc_clk_rate;
 	u32 lanes;
 	u32 mode_flags;