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drm/sun4i: dsi: Fix front vs back porch calculation 

Since I always confuse the back and front porches, a few miscalculation
slipped through. Fix them.

Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
Reviewed-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
Link: https://patchwork.freedesktop.org/patch/msgid/90c2375b8a853cae0dcc135cedb47edbc26168d8.1549896081.git-series.maxime.ripard@bootlin.com
hifive-unleashed-5.2
Maxime Ripard 2019-02-11 15:41:25 +01:00
parent efa3180120
commit 2cfdc24d2f
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GPG Key ID: E3EF0D6F671851C5
1 changed files with 4 additions and 4 deletions
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8
drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c
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@ -478,7 +478,7 @@ static void sun6i_dsi_setup_timings(struct sun6i_dsi *dsi,
*/
#define HBP_PACKET_OVERHEAD 6
hbp = max((unsigned int)HBP_PACKET_OVERHEAD,
(mode->hsync_start - mode->hdisplay) * Bpp - HBP_PACKET_OVERHEAD);
(mode->htotal - mode->hsync_end) * Bpp - HBP_PACKET_OVERHEAD);
/*
* The frontporch is set using a blanking packet (4 bytes +
@ -486,7 +486,7 @@ static void sun6i_dsi_setup_timings(struct sun6i_dsi *dsi,
*/
#define HFP_PACKET_OVERHEAD 6
hfp = max((unsigned int)HFP_PACKET_OVERHEAD,
(mode->htotal - mode->hsync_end) * Bpp - HFP_PACKET_OVERHEAD);
(mode->hsync_start - mode->hdisplay) * Bpp - HFP_PACKET_OVERHEAD);
/*
* hblk seems to be the line + porches length.
@ -532,8 +532,8 @@ static void sun6i_dsi_setup_timings(struct sun6i_dsi *dsi,
regmap_write(dsi->regs, SUN6I_DSI_BASIC_SIZE0_REG,
SUN6I_DSI_BASIC_SIZE0_VSA(mode->vsync_end -
mode->vsync_start) |
SUN6I_DSI_BASIC_SIZE0_VBP(mode->vsync_start -
mode->vdisplay));
SUN6I_DSI_BASIC_SIZE0_VBP(mode->vtotal -
mode->vsync_end));
regmap_write(dsi->regs, SUN6I_DSI_BASIC_SIZE1_REG,
SUN6I_DSI_BASIC_SIZE1_VACT(mode->vdisplay) |