Hi YoungJun, Thierry,
On 07/31/2014 06:14 AM, YoungJun Cho wrote:
This patch adds some generic functions for DCS like below to standize on common APIs rather than per-driver implementations.
mipi_dcs_enter_sleep_mode() / mipi_dcs_exit_sleep_mode()
- These are required to disable / enable all blocks inside the display module.
mipi_dcs_set_display_off() / mipi_dcs_set_display_on()
- These are required to stop / start displaying the image data on the display device.
mipi_dcs_set_tear_off() / mipi_dcs_set_tear_on()
- These are required to turn off or on the display module's TE output signal on the TE signal line.
I wonder if it wouldn't be better to make these functions inline.
Regards Andrzej
mipi_dsi_set_maximum_return_packet_size()
- Although it is not related with DCS, it is required before using mipi_dsi_dcs_read() to specify the maximum size of the payload in a long packet.
Signed-off-by: YoungJun Cho yj44.cho@samsung.com Acked-by: Inki Dae inki.dae@samsung.com Acked-by: Kyungmin Park kyungmin.park@samsung.com
drivers/gpu/drm/drm_mipi_dsi.c | 113 +++++++++++++++++++++++++++++++++++++++++ include/drm/drm_mipi_dsi.h | 14 +++++ 2 files changed, 127 insertions(+)
diff --git a/drivers/gpu/drm/drm_mipi_dsi.c b/drivers/gpu/drm/drm_mipi_dsi.c index 6b2bbda..ba506d7 100644 --- a/drivers/gpu/drm/drm_mipi_dsi.c +++ b/drivers/gpu/drm/drm_mipi_dsi.c @@ -269,6 +269,119 @@ ssize_t mipi_dsi_dcs_read(struct mipi_dsi_device *dsi, unsigned int channel, } EXPORT_SYMBOL(mipi_dsi_dcs_read);
+/**
- mipi_dsi_set_maximum_return_packet_size
- specify the maximum size of the payload in a Long packet transmitted from
- peripheral back to the host processor
- @dsi: DSI peripheral device
- @size: the maximum size of the payload
- */
+int mipi_dsi_set_maximum_return_packet_size(struct mipi_dsi_device *dsi,
u16 size)+{
- const struct mipi_dsi_host_ops *ops = dsi->host->ops;
- struct mipi_dsi_msg msg;
- if (!ops || !ops->transfer)
return -ENOSYS;- memset(&msg, 0, sizeof(msg));
- msg.channel = dsi->channel;
- msg.type = MIPI_DSI_SET_MAXIMUM_RETURN_PACKET_SIZE;
- msg.tx_len = sizeof(size);
- msg.tx_buf = (const void *)(&size);
- return ops->transfer(dsi->host, &msg);
+} +EXPORT_SYMBOL(mipi_dsi_set_maximum_return_packet_size);
+/**
- mipi_dcs_enter_sleep_mode - disable all unnecessary blocks inside the display
module except interface communication
- @dsi: DSI peripheral device
- */
+int mipi_dcs_enter_sleep_mode(struct mipi_dsi_device *dsi) +{
- u8 data = MIPI_DCS_ENTER_SLEEP_MODE;
- return mipi_dsi_dcs_write(dsi, dsi->channel, (const void *)&data,
sizeof(data));+} +EXPORT_SYMBOL(mipi_dcs_enter_sleep_mode);
+/**
- mipi_dcs_exit_sleep_mode - enable all blocks inside the display module
- @dsi: DSI peripheral device
- */
+int mipi_dcs_exit_sleep_mode(struct mipi_dsi_device *dsi) +{
- u8 data = MIPI_DCS_EXIT_SLEEP_MODE;
- return mipi_dsi_dcs_write(dsi, dsi->channel, (const void *)&data,
sizeof(data));+} +EXPORT_SYMBOL(mipi_dcs_exit_sleep_mode);
+/**
- mipi_dcs_set_display_off - stop displaying the image data on the display device
- @dsi: DSI peripheral device
- */
+int mipi_dcs_set_display_off(struct mipi_dsi_device *dsi) +{
- u8 data = MIPI_DCS_SET_DISPLAY_OFF;
- return mipi_dsi_dcs_write(dsi, dsi->channel, (const void *)&data,
sizeof(data));+} +EXPORT_SYMBOL(mipi_dcs_set_display_off);
+/**
- mipi_dcs_set_display_on - start displaying the image data on the display device
- @dsi: DSI peripheral device
- */
+int mipi_dcs_set_display_on(struct mipi_dsi_device *dsi) +{
- u8 data = MIPI_DCS_SET_DISPLAY_ON;
- return mipi_dsi_dcs_write(dsi, dsi->channel, (const void *)&data,
sizeof(data));+} +EXPORT_SYMBOL(mipi_dcs_set_display_on);
+/**
- mipi_dcs_set_tear_off - turn off the display module's Tearing Effect output
signal on the TE signal line
- @dsi: DSI peripheral device
- */
+int mipi_dcs_set_tear_off(struct mipi_dsi_device *dsi) +{
- u8 data = MIPI_DCS_SET_TEAR_OFF;
- return mipi_dsi_dcs_write(dsi, dsi->channel, (const void *)&data,
sizeof(data));+} +EXPORT_SYMBOL(mipi_dcs_set_tear_off);
+/**
- mipi_dcs_set_tear_on - turn on the display module's Tearing Effect output
signal on the TE signal line.
- @dsi: DSI peripheral device
- @mode: the Tearing Effect output line mode
- MIPI_DCS_TEAR_MODE_VBLANK: the TE output line consists of V-Blanking
information only
- MIPI_DCS_TEAR_MODE_VHBLANK : the TE output line consists of both
V-Blanking and H-Blanking information- */
+int mipi_dcs_set_tear_on(struct mipi_dsi_device *dsi,
enum mipi_dcs_tear_mode mode)+{
- u8 data[2] = { MIPI_DCS_SET_TEAR_ON, mode };
- return mipi_dsi_dcs_write(dsi, dsi->channel, (const void *)data,
sizeof(data));+} +EXPORT_SYMBOL(mipi_dcs_set_tear_on);
static int mipi_dsi_drv_probe(struct device *dev) { struct mipi_dsi_driver *drv = to_mipi_dsi_driver(dev->driver); diff --git a/include/drm/drm_mipi_dsi.h b/include/drm/drm_mipi_dsi.h index 1c41e49..5af2d0e 100644 --- a/include/drm/drm_mipi_dsi.h +++ b/include/drm/drm_mipi_dsi.h @@ -106,6 +106,11 @@ enum mipi_dsi_pixel_format { MIPI_DSI_FMT_RGB565, };
+enum mipi_dcs_tear_mode {
- MIPI_DCS_TEAR_MODE_VBLANK,
- MIPI_DCS_TEAR_MODE_VHBLANK,
+};
/**
- struct mipi_dsi_device - DSI peripheral device
- @host: DSI host for this peripheral
@@ -133,6 +138,15 @@ int mipi_dsi_dcs_write(struct mipi_dsi_device *dsi, unsigned int channel, const void *data, size_t len); ssize_t mipi_dsi_dcs_read(struct mipi_dsi_device *dsi, unsigned int channel, u8 cmd, void *data, size_t len); +int mipi_dsi_set_maximum_return_packet_size(struct mipi_dsi_device *dsi,
u16 size);+int mipi_dcs_enter_sleep_mode(struct mipi_dsi_device *dsi); +int mipi_dcs_exit_sleep_mode(struct mipi_dsi_device *dsi); +int mipi_dcs_set_display_off(struct mipi_dsi_device *dsi); +int mipi_dcs_set_display_on(struct mipi_dsi_device *dsi); +int mipi_dcs_set_tear_off(struct mipi_dsi_device *dsi); +int mipi_dcs_set_tear_on(struct mipi_dsi_device *dsi,
enum mipi_dcs_tear_mode mode);/**
- struct mipi_dsi_driver - DSI driver