diff options
| author | Archit Taneja <architt@codeaurora.org> | 2016-06-17 08:45:52 +0200 |
|---|---|---|
| committer | Archit Taneja <architt@codeaurora.org> | 2016-07-13 10:54:37 +0200 |
| commit | 62b2f026cd8e42df53dc8a6ed76594e51ab41735 (patch) | |
| tree | c381b4e82c07d6c24ede5f891a377ac69035e955 /drivers/gpu/drm/bridge/adv7511 | |
| parent | drm/bridge: adv7533: Use internal timing generator (diff) | |
| download | linux-62b2f026cd8e42df53dc8a6ed76594e51ab41735.tar.xz linux-62b2f026cd8e42df53dc8a6ed76594e51ab41735.zip | |
drm/bridge: adv7533: Change number of DSI lanes dynamically
Lower modes on ADV7533 require lower number of DSI lanes for correct
operation. If ADV7533 is being used with 4 DSI lanes, then switch the
lanes to 3 when the target mode's pixel clock is less than 80 Mhz.
Based on patch by Andy Green <andy.green@linaro.org>
Signed-off-by: Archit Taneja <architt@codeaurora.org>
Diffstat (limited to 'drivers/gpu/drm/bridge/adv7511')
| -rw-r--r-- | drivers/gpu/drm/bridge/adv7511/adv7511.h | 6 | ||||
| -rw-r--r-- | drivers/gpu/drm/bridge/adv7511/adv7511_drv.c | 3 | ||||
| -rw-r--r-- | drivers/gpu/drm/bridge/adv7511/adv7533.c | 22 |
3 files changed, 31 insertions, 0 deletions
diff --git a/drivers/gpu/drm/bridge/adv7511/adv7511.h b/drivers/gpu/drm/bridge/adv7511/adv7511.h index 90a8c0993d00..161c923d6162 100644 --- a/drivers/gpu/drm/bridge/adv7511/adv7511.h +++ b/drivers/gpu/drm/bridge/adv7511/adv7511.h @@ -339,6 +339,7 @@ struct adv7511 { #ifdef CONFIG_DRM_I2C_ADV7533 void adv7533_dsi_power_on(struct adv7511 *adv); void adv7533_dsi_power_off(struct adv7511 *adv); +void adv7533_mode_set(struct adv7511 *adv, struct drm_display_mode *mode); int adv7533_patch_registers(struct adv7511 *adv); void adv7533_uninit_cec(struct adv7511 *adv); int adv7533_init_cec(struct adv7511 *adv); @@ -354,6 +355,11 @@ static inline void adv7533_dsi_power_off(struct adv7511 *adv) { } +static inline void adv7533_mode_set(struct adv7511 *adv, + struct drm_display_mode *mode) +{ +} + static inline int adv7533_patch_registers(struct adv7511 *adv) { return -ENODEV; diff --git a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c index e0c353ea1f2f..ec8fb2ed3275 100644 --- a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c +++ b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c @@ -712,6 +712,9 @@ static void adv7511_mode_set(struct adv7511 *adv7511, regmap_update_bits(adv7511->regmap, 0x17, 0x60, (vsync_polarity << 6) | (hsync_polarity << 5)); + if (adv7511->type == ADV7533) + adv7533_mode_set(adv7511, adj_mode); + drm_mode_copy(&adv7511->curr_mode, adj_mode); /* diff --git a/drivers/gpu/drm/bridge/adv7511/adv7533.c b/drivers/gpu/drm/bridge/adv7511/adv7533.c index d002ac4cefcc..5eebd15899b1 100644 --- a/drivers/gpu/drm/bridge/adv7511/adv7533.c +++ b/drivers/gpu/drm/bridge/adv7511/adv7533.c @@ -115,6 +115,28 @@ void adv7533_dsi_power_off(struct adv7511 *adv) regmap_write(adv->regmap_cec, 0x27, 0x0b); } +void adv7533_mode_set(struct adv7511 *adv, struct drm_display_mode *mode) +{ + struct mipi_dsi_device *dsi = adv->dsi; + int lanes, ret; + + if (adv->num_dsi_lanes != 4) + return; + + if (mode->clock > 80000) + lanes = 4; + else + lanes = 3; + + if (lanes != dsi->lanes) { + mipi_dsi_detach(dsi); + dsi->lanes = lanes; + ret = mipi_dsi_attach(dsi); + if (ret) + dev_err(&dsi->dev, "failed to change host lanes\n"); + } +} + int adv7533_patch_registers(struct adv7511 *adv) { return regmap_register_patch(adv->regmap, |