It's better to leave power handling and controller init to the modesetting machinery using the simple pipe .enable and .disable callbacks.
Signed-off-by: Noralf Trønnes noralf@tronnes.org --- drivers/gpu/drm/tinydrm/mi0283qt.c | 55 +++++++++----------------------------- drivers/gpu/drm/tinydrm/mipi-dbi.c | 10 ++++--- 2 files changed, 19 insertions(+), 46 deletions(-)
diff --git a/drivers/gpu/drm/tinydrm/mi0283qt.c b/drivers/gpu/drm/tinydrm/mi0283qt.c index d61f987..9495c9a 100644 --- a/drivers/gpu/drm/tinydrm/mi0283qt.c +++ b/drivers/gpu/drm/tinydrm/mi0283qt.c @@ -20,9 +20,11 @@ #include <linux/spi/spi.h> #include <video/mipi_display.h>
-static int mi0283qt_init(struct mipi_dbi *mipi) +static void mi0283qt_enable(struct drm_simple_display_pipe *pipe, + struct drm_crtc_state *crtc_state) { - struct tinydrm_device *tdev = &mipi->tinydrm; + struct tinydrm_device *tdev = pipe_to_tinydrm(pipe); + struct mipi_dbi *mipi = mipi_dbi_from_tinydrm(tdev); struct device *dev = tdev->drm.dev; u8 addr_mode; int ret; @@ -31,20 +33,19 @@ static int mi0283qt_init(struct mipi_dbi *mipi)
ret = regulator_enable(mipi->regulator); if (ret) { - dev_err(dev, "Failed to enable regulator %d\n", ret); - return ret; + dev_err(dev, "Failed to enable regulator (%d)\n", ret); + return; }
- /* Avoid flicker by skipping setup if the bootloader has done it */ if (mipi_dbi_display_is_on(mipi)) - return 0; + goto out_enable;
mipi_dbi_hw_reset(mipi); ret = mipi_dbi_command(mipi, MIPI_DCS_SOFT_RESET); if (ret) { - dev_err(dev, "Error sending command %d\n", ret); + dev_err(dev, "Error sending command (%d)\n", ret); regulator_disable(mipi->regulator); - return ret; + return; }
msleep(20); @@ -110,19 +111,12 @@ static int mi0283qt_init(struct mipi_dbi *mipi) mipi_dbi_command(mipi, MIPI_DCS_SET_DISPLAY_ON); msleep(100);
- return 0; -} - -static void mi0283qt_fini(void *data) -{ - struct mipi_dbi *mipi = data; - - DRM_DEBUG_KMS("\n"); - regulator_disable(mipi->regulator); +out_enable: + mipi_dbi_pipe_enable(pipe, crtc_state); }
static const struct drm_simple_display_pipe_funcs mi0283qt_pipe_funcs = { - .enable = mipi_dbi_pipe_enable, + .enable = mi0283qt_enable, .disable = mipi_dbi_pipe_disable, .update = tinydrm_display_pipe_update, .prepare_fb = tinydrm_display_pipe_prepare_fb, @@ -206,17 +200,6 @@ static int mi0283qt_probe(struct spi_device *spi) return ret; }
- ret = mi0283qt_init(mipi); - if (ret) - return ret; - - /* use devres to fini after drm unregister (drv->remove is before) */ - ret = devm_add_action(dev, mi0283qt_fini, mipi); - if (ret) { - mi0283qt_fini(mipi); - return ret; - } - spi_set_drvdata(spi, mipi);
return devm_tinydrm_register(&mipi->tinydrm); @@ -232,25 +215,13 @@ static void mi0283qt_shutdown(struct spi_device *spi) static int __maybe_unused mi0283qt_pm_suspend(struct device *dev) { struct mipi_dbi *mipi = dev_get_drvdata(dev); - int ret; - - ret = tinydrm_suspend(&mipi->tinydrm); - if (ret) - return ret;
- mi0283qt_fini(mipi); - - return 0; + return tinydrm_suspend(&mipi->tinydrm); }
static int __maybe_unused mi0283qt_pm_resume(struct device *dev) { struct mipi_dbi *mipi = dev_get_drvdata(dev); - int ret; - - ret = mi0283qt_init(mipi); - if (ret) - return ret;
return tinydrm_resume(&mipi->tinydrm); } diff --git a/drivers/gpu/drm/tinydrm/mipi-dbi.c b/drivers/gpu/drm/tinydrm/mipi-dbi.c index ec8f001..8498b49 100644 --- a/drivers/gpu/drm/tinydrm/mipi-dbi.c +++ b/drivers/gpu/drm/tinydrm/mipi-dbi.c @@ -263,8 +263,9 @@ static const struct drm_framebuffer_funcs mipi_dbi_fb_funcs = { * @pipe: Display pipe * @crtc_state: CRTC state * - * This function enables backlight. Drivers can use this as their - * &drm_simple_display_pipe_funcs->enable callback. + * This function flushes the whole framebuffer and enables the backlight. + * Drivers can use this in their &drm_simple_display_pipe_funcs->enable + * callback. */ void mipi_dbi_pipe_enable(struct drm_simple_display_pipe *pipe, struct drm_crtc_state *crtc_state) @@ -273,8 +274,6 @@ void mipi_dbi_pipe_enable(struct drm_simple_display_pipe *pipe, struct mipi_dbi *mipi = mipi_dbi_from_tinydrm(tdev); struct drm_framebuffer *fb = pipe->plane.fb;
- DRM_DEBUG_KMS("\n"); - mipi->enabled = true; if (fb) fb->funcs->dirty(fb, NULL, 0, 0, NULL, 0); @@ -321,6 +320,9 @@ void mipi_dbi_pipe_disable(struct drm_simple_display_pipe *pipe) tinydrm_disable_backlight(mipi->backlight); else mipi_dbi_blank(mipi); + + if (mipi->regulator) + regulator_disable(mipi->regulator); } EXPORT_SYMBOL(mipi_dbi_pipe_disable);