diff options
| author | Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> | 2013-11-13 16:35:15 +0400 |
|---|---|---|
| committer | Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> | 2013-12-02 04:27:28 +0400 |
| commit | 5cca30ebe089be23bc2588c4b76af69e89b3b639 (patch) | |
| tree | 2998202c77d0bc3e6bed5de4d0d1a6a7790e7a35 | |
| parent | e8355e0dc48c966477e6b427e7043ea71698776a (diff) | |
| download | linux-5cca30ebe089be23bc2588c4b76af69e89b3b639.tar.xz | |
drm/rcar-du: Add LVDS_LANES quirk
LVDS lanes 1 and 3 are switched in ES1 hardware (R8A7790). The problem
has been fixed in newer revisions, add a quirk to make the workaround
selectable.
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
| -rw-r--r-- | drivers/gpu/drm/rcar-du/rcar_du_drv.c | 2 | ||||
| -rw-r--r-- | drivers/gpu/drm/rcar-du/rcar_du_drv.h | 1 | ||||
| -rw-r--r-- | drivers/gpu/drm/rcar-du/rcar_du_lvdsenc.c | 15 |
3 files changed, 12 insertions, 6 deletions
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_drv.c b/drivers/gpu/drm/rcar-du/rcar_du_drv.c index a0ffacb4b80b..4eee02f89965 100644 --- a/drivers/gpu/drm/rcar-du/rcar_du_drv.c +++ b/drivers/gpu/drm/rcar-du/rcar_du_drv.c @@ -250,7 +250,7 @@ static const struct rcar_du_device_info rcar_du_r8a7779_info = { static const struct rcar_du_device_info rcar_du_r8a7790_info = { .features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK | RCAR_DU_FEATURE_DEFR8, - .quirks = RCAR_DU_QUIRK_ALIGN_128B, + .quirks = RCAR_DU_QUIRK_ALIGN_128B | RCAR_DU_QUIRK_LVDS_LANES, .num_crtcs = 3, .routes = { /* R8A7790 has one RGB output, two LVDS outputs and one diff --git a/drivers/gpu/drm/rcar-du/rcar_du_drv.h b/drivers/gpu/drm/rcar-du/rcar_du_drv.h index 7ca98f352479..e31b735d3f25 100644 --- a/drivers/gpu/drm/rcar-du/rcar_du_drv.h +++ b/drivers/gpu/drm/rcar-du/rcar_du_drv.h @@ -31,6 +31,7 @@ struct rcar_du_lvdsenc; #define RCAR_DU_FEATURE_DEFR8 (1 << 1) /* Has DEFR8 register */ #define RCAR_DU_QUIRK_ALIGN_128B (1 << 0) /* Align pitches to 128 bytes */ +#define RCAR_DU_QUIRK_LVDS_LANES (1 << 1) /* LVDS lanes 1 and 3 inverted */ /* * struct rcar_du_output_routing - Output routing specification diff --git a/drivers/gpu/drm/rcar-du/rcar_du_lvdsenc.c b/drivers/gpu/drm/rcar-du/rcar_du_lvdsenc.c index fe1f6f59f539..df30a075d793 100644 --- a/drivers/gpu/drm/rcar-du/rcar_du_lvdsenc.c +++ b/drivers/gpu/drm/rcar-du/rcar_du_lvdsenc.c @@ -44,6 +44,7 @@ static int rcar_du_lvdsenc_start(struct rcar_du_lvdsenc *lvds, const struct drm_display_mode *mode = &rcrtc->crtc.mode; unsigned int freq = mode->clock; u32 lvdcr0; + u32 lvdhcr; u32 pllcr; int ret; @@ -72,15 +73,19 @@ static int rcar_du_lvdsenc_start(struct rcar_du_lvdsenc *lvds, * VSYNC -> CTRL1 * DISP -> CTRL2 * 0 -> CTRL3 - * - * Channels 1 and 3 are switched on ES1. */ rcar_lvds_write(lvds, LVDCTRCR, LVDCTRCR_CTR3SEL_ZERO | LVDCTRCR_CTR2SEL_DISP | LVDCTRCR_CTR1SEL_VSYNC | LVDCTRCR_CTR0SEL_HSYNC); - rcar_lvds_write(lvds, LVDCHCR, - LVDCHCR_CHSEL_CH(0, 0) | LVDCHCR_CHSEL_CH(1, 3) | - LVDCHCR_CHSEL_CH(2, 2) | LVDCHCR_CHSEL_CH(3, 1)); + + if (rcar_du_needs(lvds->dev, RCAR_DU_QUIRK_LVDS_LANES)) + lvdhcr = LVDCHCR_CHSEL_CH(0, 0) | LVDCHCR_CHSEL_CH(1, 3) + | LVDCHCR_CHSEL_CH(2, 2) | LVDCHCR_CHSEL_CH(3, 1); + else + lvdhcr = LVDCHCR_CHSEL_CH(0, 0) | LVDCHCR_CHSEL_CH(1, 1) + | LVDCHCR_CHSEL_CH(2, 2) | LVDCHCR_CHSEL_CH(3, 3); + + rcar_lvds_write(lvds, LVDCHCR, lvdhcr); /* Select the input, hardcode mode 0, enable LVDS operation and turn * bias circuitry on. |