On Mon, Jan 07, 2019 at 12:15:56PM +0100, Hans de Goede wrote:
> Add support for PMIC MIPI sequences using the new
> intel_soc_pmic_exec_mipi_pmic_seq_element function.
>
> This fixes the DSI LCD panel not lighting up when not initialized by the
> GOP (because an external monitor was connected) on GPD win and GPD pocket
> devices.
>
> Specifically the LCD panel seems to need GPIO pin 9 on the PMIC to be
> driven high, which is done through a PMIC MIPI sequence. Before this commit
> if the sequence was not executed by the GOP the pin would stay low causing
> the LCD panel to not work. Having the MIPI sequences properly control this
> GPIO should also help save some power when the panel is off.
>
> Changes in v2, v3:
> -Only changes to other patches in this patch-set
>
> Changes in v4:
> -Move decoding of the raw 15 bytes PMIC MIPI sequence element into
> i2c-address, register-address, value and mask into the mipi_exec_pmic()
> function instead of passing the raw data to
> intel_soc_pmic_exec_mipi_pmic_seq_element()
>
> Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx>
Reviewed-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
> ---
> drivers/gpu/drm/i915/intel_dsi_vbt.c | 22 +++++++++++++++++++++-
> 1 file changed, 21 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_dsi_vbt.c b/drivers/gpu/drm/i915/intel_dsi_vbt.c
> index 3d1fa1a03a66..240664ef294c 100644
> --- a/drivers/gpu/drm/i915/intel_dsi_vbt.c
> +++ b/drivers/gpu/drm/i915/intel_dsi_vbt.c
> @@ -29,9 +29,11 @@
> #include <drm/drm_edid.h>
> #include <drm/i915_drm.h>
> #include <linux/gpio/consumer.h>
> +#include <linux/mfd/intel_soc_pmic.h>
> #include <linux/slab.h>
> #include <video/mipi_display.h>
> #include <asm/intel-mid.h>
> +#include <asm/unaligned.h>
> #include "i915_drv.h"
> #include "intel_drv.h"
> #include "intel_dsi.h"
> @@ -392,7 +394,25 @@ static const u8 *mipi_exec_spi(struct intel_dsi *intel_dsi, const u8 *data)
>
> static const u8 *mipi_exec_pmic(struct intel_dsi *intel_dsi, const u8 *data)
> {
> - DRM_DEBUG_KMS("Skipping PMIC element execution\n");
> +#ifdef CONFIG_PMIC_OPREGION
> + u32 value, mask, reg_address;
> + u16 i2c_address;
> + int ret;
> +
> + /* byte 0 aka PMIC Flag is reserved */
> + i2c_address = get_unaligned_le16(data + 1);
> + reg_address = get_unaligned_le32(data + 3);
> + value = get_unaligned_le32(data + 7);
> + mask = get_unaligned_le32(data + 11);
> +
> + ret = intel_soc_pmic_exec_mipi_pmic_seq_element(i2c_address,
> + reg_address,
> + value, mask);
> + if (ret)
> + DRM_ERROR("%s failed, error: %d\n", __func__, ret);
> +#else
> + DRM_ERROR("Your hardware requires CONFIG_PMIC_OPREGION and it is not set\n");
> +#endif
>
> return data + 15;
> }
> --
> 2.20.1
>
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--
Ville Syrjälä
Intel
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