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drm/bridge: adv7533: Change number of DSI lanes dynamically

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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>
This commit is contained in:
Archit Taneja
2016-06-17 12:15:52 +05:30
parent 78fa479d70
commit 62b2f026cd
3 changed files with 31 additions and 0 deletions
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6
drivers/gpu/drm/bridge/adv7511/adv7511.h
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@@ -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;